TTMusic/entry/src/main/ets/pages/WebDavMainPage.ets

import { BreadcrumbItem, RemoteDriveGlobalSearchResult, RemoteDriveManager } from '../common/util/RemoteDriveManager';
import { WebDavAccount } from '../viewmodel/WebDavAccount';
import { Song } from '../viewmodel/Song';
import { RemoteDriveManagerStates } from '../common/enums/RemoteDriveManagerStates';
import Logger from '../common/util/Logger';
import { SymbolGlyphModifier, router, curves } from '@kit.ArkUI';
import { CommonConstants } from '../common/constants/CommonConstants';
import { VideoItem } from '../viewmodel/VideoItem';
import { GlobalContext } from '../common/util/GlobalContext';
import { FileInfo } from '../viewmodel/FileInfo';
import { emitter, deviceInfo } from '@kit.BasicServicesKit';
import { hdsEffect } from '@kit.UIDesignKit';
import { EventConstants } from '../common/constants/EventConstants';
import { LazyDataSource } from '../common/util/LazyDataSource';
import { ArrayUtil, FileUtil, MD5, PreferencesUtil, StrUtil, ToastUtil } from '@pura/harmony-utils';
import { MenuModifier } from '../common/util/AttributeModifierUtil';
import { getRemoteDriveAccountLabel, getRemoteDriveDisplayLabel, getRemoteDrivePlaylistPrefix } from '../common/util/RemoteDriveLabel';
import { RemoteDriveType } from '../common/enums/RemoteDriveType';
import { Utility } from '../common/util/Utility';
import { SettingPage } from './SettingPage';
import { getCloudDiskIcon } from '../dialog/RemoteDriveAccountDialog';
import { CreateFolderDialog } from '../dialog/CreateFolderDialog';
import { UploadMusicPage } from './UploadMusicPage';
import { FFmpeg } from '@sj/ffmpeg';
import FileManager from '../common/util/FileManager';
import { fileIo, fileUri, picker } from '@kit.CoreFileKit';
import { mergeCoverWithPriority, setVideoUrlForSong } from '../common/util/RemotePlayerUtil';
import { showAddToPlaylistDialog } from '../dialog/AddToPlaylistDialog';
import { showCreatePlaylistDialog } from '../dialog/PlaylistDialog';
import { Playlist } from '../viewmodel/Playlist';
import PlaylistTable from '../common/util/PlaylistTable';
import MediaTable from '../common/util/MediaTable';
import { DownloadCenterManager, DownloadCenterTask } from '../common/util/DownloadCenterManager';
import { TitleBarPointLightButton } from '../view/PointLight/TitleBarPointLightButton';
import { DownloadCenter } from '../view/DownloadCenter';
import { WebDavUrlUtil } from '../common/util/WebDavUrlUtil';
import { SearchHistoryUtil } from '../common/util/SearchHistoryUtil';
import { PlayingIndicator } from '../view/PlayingIndicator';
import { buildWebDavVisibleThumbPrefetchWindow, WebDavThumbPrefetchRange } from '../common/util/WebDavThumbPrefetchHelper';
import { buildWebDavSongItemRenderKey } from '../common/util/WebDavListRenderHelper';
import { MusicPlaybackController } from '../controller/MusicPlaybackController';

interface WebDavMetadataUpdatePayload {
  filePath: string;
  pixelMapPath?: string;
  isCustomCover?: number;
  md5Str?: string;
  name?: string;
  artist?: string;
}

interface RemoteThumbSource {
  playUrl: string;
  headers: Map<string, string>;
}

const TAG = 'heanup WebDavMainPage';
const REMOTE_THUMB_CACHE_DIR: string = 'remote_thumbs';
const REMOTE_THUMB_CAPTURE_SECONDS: string = '1.2';
const WEBDAV_PROGRESSIVE_RELOAD_THRESHOLD: number = 180;
const WEBDAV_PROGRESSIVE_RELOAD_INITIAL_COUNT: number = 20;
const WEBDAV_PROGRESSIVE_RELOAD_BATCH_SIZE: number = 20;
const WEBDAV_PROGRESSIVE_RELOAD_DELAY_MS: number = 32;
const WEBDAV_VISIBLE_THUMB_PREFETCH_DELAY_MS: number = 120;

// WebDAV歌曲数据全局内存存储
let globalWebdavVideoItems: VideoItem[] = [];
let globalWebdavCurrentPlayIndex: number = 0;
let globalRemoteThumbFfmpegQueue: Promise<void> = Promise.resolve();

// 导出函数供LocalMusic访问
export function getWebdavVideoItems(): VideoItem[] {
  return globalWebdavVideoItems;
}

export function getWebdavCurrentPlayIndex(): number {
  return globalWebdavCurrentPlayIndex;
}

export function setWebdavPlaylist(items: VideoItem[], startIndex: number): void {
  globalWebdavVideoItems = items.slice();
  globalWebdavCurrentPlayIndex = startIndex;
}

export function clearWebdavVideoItems(): void {
  globalWebdavVideoItems = [];
  globalWebdavCurrentPlayIndex = 0;
}

// URL解码函数
function decodeUrlEncodedString(encodedStr: string): string {
  try {
    return decodeURIComponent(encodedStr);
  } catch (error) {
    // 如果解码失败，返回原始字符串
    return encodedStr;
  }
}

@Preview
@Entry
@Component
export struct WebDavMainPage {
  @State appName: string = ''
  @State isShowUploadFile: boolean = false
  @State isShowTitleBar: boolean = true //是否显示分类导航条
  private prevOffsetY: number = 0; // 记录上一次的Y轴偏移量
  @State autoHideTitle: boolean = true //滚动自动隐藏标题栏
  @State isCustomizeBg: boolean = false //自定义背景界面
  @State isHomeBgFollowMusicCover: boolean = true //主页背景随当前播放封面
  @StorageProp('isLandscape')  isLandscape: boolean = false;
  @State blurValue: number = 0 //背景模糊
  @State bgBrightness: number = 0 //背景亮度
  @State customizeBgPath: string | undefined = '';
  @StorageProp('customizeMusicBgPath') customizeMusicBgPath: string = '';
  private listScroller: ListScroller = new ListScroller()
  @StorageProp('bottomSafeHeight') bottomSafeHeight: number = 0;
  searchController: SearchController = new SearchController()
  private searchTicket: number = 0;
  @StorageProp('animationState') animationState: AnimationStatus= AnimationStatus.Running
  @State isSearchMode: boolean = false
  @StorageLink('currentSong') @Watch('onHomeBgCurrentSongChange') currentSong: VideoItem | undefined = undefined;
  @StorageProp('topSafeHeight') topSafeHeight: number = 0;
  @State webdavManager: RemoteDriveManager = RemoteDriveManager.getInstance();
  @State accounts: WebDavAccount[] = [];
  @Prop @Watch('onSwitchAccount') selectedAccount: WebDavAccount;
  private songs: VideoItem[] = [];
  @State  dataSource:LazyDataSource<VideoItem> = new LazyDataSource(this.songs)
  @Link mType: number;
  @Link offsetX: number;
  @Link isShowDrawer: boolean;
  @State isLoading: boolean = false;
  @State isRefreshingCache: boolean = false;
  @State isDirectoryNavigationLoading: boolean = false;
  private webDavFiles: FileInfo[] = []; // 原始目录数据保持为普通字段，避免大数组响应式代理卡顿
  @StorageProp('themeColor') themeColor: string = CommonConstants.DEFAULT_THEME_COLOR;
  @StorageProp('isDarkMode') isDarkMode: boolean = false;
  @State currentDirectoryPath: string = '';
  @State breadcrumbs:BreadcrumbItem[] = []//面包屑导航
  @State private pointLightOptions: hdsEffect.PointLightOptions | undefined = undefined
  @State private activePointLightItemKey: string = ''

  @State visibleFoldersState: FileInfo[] = []; // 改为普通状态变量
  @State isShowFileName: boolean = false//是否显示文件名
  @State isLongNameRoLL: boolean = true//长歌名滚动
  @State sortType: number = 0 //默认排序方式
  @Consume isMultiSelect: boolean
  @State selectedSongs: VideoItem[] = []
  @State selectedFolders: FileInfo[] = []
  @State isAllSelected: boolean = false
  @State isDeletingSelection: boolean = false
  @State ignoreTapAfterExitMultiSelect: boolean = false
  @State isShowSongPropertySheet: boolean = false
  @State songForPropertySheet: VideoItem | undefined = undefined
  @State rootPath: string = ''
  @State isShowDownloadCenter: boolean = false
  @State downloadCenterTabIndex: number[] = [0]
  @State downloadCenterRefreshVersion: number = 0
  @State downloadCenterActiveTasks: DownloadCenterTask[] = []
  @State downloadCenterCompletedTasks: DownloadCenterTask[] = []
  @State isSearchLoading: boolean = false
  private readonly downloadFolderName: string = '下载'
  private readonly metadataUpdateEvent: emitter.InnerEvent = { eventId: EventConstants.EVENT_WEBDAV_METADATA_UPDATED };
  private thumbnailTaskToken: number = 0;
  private thumbnailRunningKeys: Set<string> = new Set<string>();
  private visibleListStartIndex: number = -1;
  private visibleListEndIndex: number = -1;
  private scheduledThumbPrefetchTimer: number = -1;
  private lastVisibleThumbStart: number = -1;
  private lastVisibleThumbEndExclusive: number = -1;
  private readonly downloadCenterManager: DownloadCenterManager = DownloadCenterManager.getInstance();
  private readonly downloadCenterListener: () => void = (): void => {
    this.scheduleDownloadCenterRefresh();
  };
  private downloadCenterRefreshTimer: number = -1;
  private displayReloadToken: number = 0;
  private pendingDirectoryRefreshToken: number = 0;
  private playbackController: MusicPlaybackController = MusicPlaybackController.getInstance()

  private async runSerializedThumbnailFfmpeg(task: () => Promise<void>): Promise<void> {
    const nextTask: Promise<void> = globalRemoteThumbFfmpegQueue.then(async (): Promise<void> => {
      await task();
    }, async (): Promise<void> => {
      await task();
    });
    globalRemoteThumbFfmpegQueue = nextTask.catch((): void => {});
    await nextTask;
  }

  async onSwitchAccount(){
    console.log('heanup 切换账户:', this.selectedAccount.name);
    this.cancelPendingDirectoryRefresh();
    this.resetRemoteThumbPrefetchState();
    this.searchTicket++;
    this.searchText = '';
    this.filteredList = [];
    this.filteredFolderList = [];
    this.isSearchMode = false;
    this.isSearchLoading = false;
    this.songs = [];
    this.visibleFoldersState = [];
    this.updateListData(this.songs)
    this.exitMultiSelect();

    // 注意：不再需要清空全局上下文，因为LocalMusic已改用实例变量缓存
    // 当新账户加载时，新的认证信息会自动覆盖旧的
    Logger.info(TAG, 'heanup 切换账户，准备加载新账户文件');
    this.currentDirectoryPath = this.selectedAccount.filepath || '/';

    this.scheduleDirectoryRefresh(this.selectedAccount.filepath,
      () => this.webdavManager.loadFilesInfoFromAccount(this.selectedAccount), '加载文件失败');
    this.breadcrumbs = this.webdavManager.getBreadcrumbs();
  }

  updateListData(mList:Array<VideoItem>, noSort?: boolean, shouldScrollToTop: boolean = true){
    if (!noSort) {
      this.sortType = PreferencesUtil.getNumberSync('webDavSortType', 0)
      this.doSortType(this.sortType, shouldScrollToTop)
      return
    }
    this.refreshDisplaySongs(mList, shouldScrollToTop)
  }

  private refreshDisplaySongs(mList: Array<VideoItem>, shouldScrollToTop: boolean = true): void {
    const reloadToken: number = ++this.displayReloadToken;
    this.invalidateRemoteThumbPrefetchRange()
    const displayItems: Array<VideoItem> = mList ? [...mList] : [];
    if (displayItems.length <= WEBDAV_PROGRESSIVE_RELOAD_THRESHOLD) {
      this.dataSource.pushArrayData(displayItems)
      if (shouldScrollToTop && displayItems.length > 0) {
        setTimeout(() => {
          if (reloadToken !== this.displayReloadToken) {
            return
          }
          this.listScroller.scrollToIndex(0)
        }, 120)
      }
      return
    }

    const initialItems: Array<VideoItem> = displayItems.slice(0, WEBDAV_PROGRESSIVE_RELOAD_INITIAL_COUNT)
    this.dataSource.pushArrayData(initialItems)
    if (shouldScrollToTop && initialItems.length > 0) {
      setTimeout(() => {
        if (reloadToken !== this.displayReloadToken) {
          return
        }
        this.listScroller.scrollToIndex(0)
      }, 80)
    }

    let cursor: number = initialItems.length
    const appendNextBatch = (): void => {
      if (reloadToken !== this.displayReloadToken) {
        return
      }
      if (cursor >= displayItems.length) {
        return
      }
      const nextBatch: Array<VideoItem> = displayItems.slice(cursor, cursor + WEBDAV_PROGRESSIVE_RELOAD_BATCH_SIZE)
      this.dataSource.appendArrayData(nextBatch)
      cursor += nextBatch.length
      if (cursor < displayItems.length) {
        setTimeout(() => {
          appendNextBatch()
        }, WEBDAV_PROGRESSIVE_RELOAD_DELAY_MS)
      }
    }
    setTimeout(() => {
      appendNextBatch()
    }, WEBDAV_PROGRESSIVE_RELOAD_DELAY_MS)
  }

  private cancelPendingDirectoryRefresh(): void {
    this.pendingDirectoryRefreshToken += 1
  }

  private startDirectoryNavigationLoading(): void {
    this.isDirectoryNavigationLoading = true
  }

  private stopDirectoryNavigationLoading(): void {
    this.isDirectoryNavigationLoading = false
  }

  private scheduleDirectoryRefresh(_targetPath: string | undefined, loadAction: () => Promise<void>,
    errorPrefix: string): void {
    this.cancelPendingDirectoryRefresh()
    this.startDirectoryNavigationLoading()
    const refreshToken: number = this.pendingDirectoryRefreshToken
    this.isLoading = true
    this.isRefreshingCache = false

    const executeLoad = (): void => {
      if (refreshToken !== this.pendingDirectoryRefreshToken) {
        return
      }
      void loadAction().catch((error: Error) => {
        if (refreshToken !== this.pendingDirectoryRefreshToken) {
          return
        }
        Logger.error(TAG, `${errorPrefix}: ${error.message}`)
        this.isLoading = false
        this.isRefreshingCache = false
        this.stopDirectoryNavigationLoading()
      })
    }

    executeLoad()
  }

  private buildThumbnailIdentity(item: VideoItem): string {
    const accountId: string = item.webdav_account_id ? item.webdav_account_id : '';
    const relPath: string = item.remote_rel_path ? item.remote_rel_path : '';
    return `${item.type}:${accountId}:${relPath}:${item.filePath}`;
  }

  private async ensureThumbnailCacheDir(): Promise<string> {
    const context = getContext(this);
    const cacheDir: string = `${context.filesDir}/${REMOTE_THUMB_CACHE_DIR}`;
    await FileManager.createDir(cacheDir);
    return cacheDir;
  }

  private async resolveRemoteThumbPath(item: VideoItem): Promise<string> {
    const cacheDir: string = await this.ensureThumbnailCacheDir();
    const identity: string = this.buildThumbnailIdentity(item);
    const hashName: string = MD5.digestSync(identity);
    return `${cacheDir}/${hashName}.jpg`;
  }

  private buildFfmpegHeadersArg(headers: Map<string, string>): string {
    if (!headers || headers.size <= 0) {
      return '';
    }
    const lines: string[] = [];
    headers.forEach((value: string, key: string): void => {
      if (StrUtil.isEmpty(key) || StrUtil.isEmpty(value)) {
        return;
      }
      lines.push(`${key}: ${value}`);
    });
    if (lines.length <= 0) {
      return '';
    }
    return `${lines.join('\r\n')}\r\n`;
  }

  private buildRemoteThumbFfmpegCmd(playUrl: string, headersArg: string, outputPath: string): string[] {
    const commands: string[] = ['ffmpeg', '-y', '-ss', REMOTE_THUMB_CAPTURE_SECONDS];
    const networkArgs: string[] = this.buildRemoteFfmpegNetworkArgs(playUrl);
    for (let index: number = 0; index < networkArgs.length; index += 1) {
      commands.push(networkArgs[index]);
    }
    if (StrUtil.isNotEmpty(headersArg)) {
      commands.push('-headers', headersArg);
    }
    commands.push(
      '-i', playUrl,
      '-frames:v', '1',
      '-vf', 'scale=320:-2',
      '-q:v', '4',
      outputPath
    );
    return commands;
  }

  private buildRemoteAudioCoverFfmpegCmd(playUrl: string, headersArg: string, outputPath: string): string[] {
    const commands: string[] = ['ffmpeg', '-y'];
    const networkArgs: string[] = this.buildRemoteFfmpegNetworkArgs(playUrl);
    for (let index: number = 0; index < networkArgs.length; index += 1) {
      commands.push(networkArgs[index]);
    }
    if (StrUtil.isNotEmpty(headersArg)) {
      commands.push('-headers', headersArg);
    }
    commands.push(
      '-i', playUrl,
      '-map', '0:v:0',
      '-frames:v', '1',
      '-q:v', '4',
      outputPath
    );
    return commands;
  }

  private buildRemoteFfmpegNetworkArgs(playUrl: string): string[] {
    if (StrUtil.isEmpty(playUrl)) {
      return [];
    }
    const lowerPlayUrl: string = playUrl.toLowerCase();
    if (!lowerPlayUrl.startsWith('http://') && !lowerPlayUrl.startsWith('https://')) {
      return [];
    }
    return ['-rw_timeout', '15000000', '-probesize', '1048576', '-analyzeduration', '2000000'];
  }

  private sanitizeFfmpegCommands(commands: string[]): string[] {
    const safeCommands: string[] = [];
    for (let index: number = 0; index < commands.length; index++) {
      const value: string = commands[index];
      if (value === undefined || value === null) {
        Logger.warn(TAG, `缩略图命令存在空参数 index=${index}`);
        continue;
      }
      const text: string = `${value}`;
      if (text.length <= 0) {
        Logger.warn(TAG, `缩略图命令存在空字符串参数 index=${index}`);
        continue;
      }
      safeCommands.push(text);
    }
    return safeCommands;
  }

  private async executeSafeFfmpeg(commands: string[]): Promise<void> {
    // 兼容部分版本 @sj/ffmpeg 对第二个参数空值处理不安全的问题
    await FFmpeg.execute(commands, {});
  }

  private normalizeThumbImageSource(path: string): string {
    if (StrUtil.isEmpty(path)) {
      return '';
    }
    if (path.startsWith('http://') || path.startsWith('https://') || path.startsWith('file://')) {
      return path;
    }
    if (path.startsWith('/')) {
      return fileUri.getUriFromPath(path);
    }
    return path;
  }

  private normalizeThumbLocalPath(path: string): string {
    if (StrUtil.isEmpty(path)) {
      return '';
    }
    if (path.startsWith('file://')) {
      try {
        return new fileUri.FileUri(path).path;
      } catch (error) {
        const err: Error = error as Error;
        Logger.warn(TAG, `缩略图URI转路径失败 uri=${path}, error=${err.message}`);
        return '';
      }
    }
    return path;
  }

  private isThumbCacheValid(localPath: string): boolean {
    if (StrUtil.isEmpty(localPath)) {
      return false;
    }
    if (!FileUtil.accessSync(localPath)) {
      return false;
    }
    try {
      const stat: fileIo.Stat = fileIo.statSync(localPath);
      if (stat.size <= 1024) {
        Logger.warn(TAG, `缩略图缓存文件过小，判定无效 path=${localPath}, size=${stat.size}`);
        return false;
      }
      if (this.isImageMagicValid(localPath)) {
        return true;
      }
      Logger.warn(TAG, `缩略图缓存文件头无效，判定无效 path=${localPath}, size=${stat.size}`);
    } catch (error) {
      const err: Error = error as Error;
      Logger.warn(TAG, `缩略图缓存校验失败 path=${localPath}, error=${err.message}`);
    }
    return false;
  }

  private isImageMagicValid(localPath: string): boolean {
    let file: fileIo.File | undefined = undefined;
    try {
      file = fileIo.openSync(localPath, fileIo.OpenMode.READ_ONLY);
      const headerBuffer: ArrayBuffer = new ArrayBuffer(12);
      const readLen: number = fileIo.readSync(file.fd, headerBuffer);
      if (readLen < 4) {
        return false;
      }
      const bytes: Uint8Array = new Uint8Array(headerBuffer);
      const isJpg: boolean = bytes[0] === 0xFF && bytes[1] === 0xD8 && bytes[2] === 0xFF;
      const isPng: boolean = readLen >= 8 &&
        bytes[0] === 0x89 && bytes[1] === 0x50 && bytes[2] === 0x4E && bytes[3] === 0x47 &&
        bytes[4] === 0x0D && bytes[5] === 0x0A && bytes[6] === 0x1A && bytes[7] === 0x0A;
      const isGif: boolean = readLen >= 4 &&
        bytes[0] === 0x47 && bytes[1] === 0x49 && bytes[2] === 0x46 && bytes[3] === 0x38;
      const isBmp: boolean = bytes[0] === 0x42 && bytes[1] === 0x4D;
      const isWebp: boolean = readLen >= 12 &&
        bytes[0] === 0x52 && bytes[1] === 0x49 && bytes[2] === 0x46 && bytes[3] === 0x46 &&
        bytes[8] === 0x57 && bytes[9] === 0x45 && bytes[10] === 0x42 && bytes[11] === 0x50;
      return isJpg || isPng || isGif || isBmp || isWebp;
    } catch (error) {
      const err: Error = error as Error;
      Logger.warn(TAG, `缩略图文件头校验失败 path=${localPath}, error=${err.message}`);
      return false;
    } finally {
      if (file !== undefined) {
        try {
          fileIo.closeSync(file);
        } catch (error) {
          const err: Error = error as Error;
          Logger.warn(TAG, `关闭缩略图文件失败 path=${localPath}, error=${err.message}`);
        }
      }
    }
  }

  private removeInvalidThumbCache(localPath: string): void {
    if (StrUtil.isEmpty(localPath) || !FileUtil.accessSync(localPath)) {
      return;
    }
    try {
      fileIo.unlinkSync(localPath);
      Logger.info(TAG, `已删除无效缩略图缓存 path=${localPath}`);
    } catch (error) {
      const err: Error = error as Error;
      Logger.warn(TAG, `删除无效缩略图缓存失败 path=${localPath}, error=${err.message}`);
    }
  }

  private resolveFileNameForTypeCheck(item: VideoItem): string {
    const rawName: string = item.fileName ?? item.remote_rel_path ?? item.filePath;
    if (StrUtil.isEmpty(rawName)) {
      return '';
    }
    const hashIndex = rawName.indexOf('#');
    const queryIndex = rawName.indexOf('?');
    let endIndex = rawName.length;
    if (queryIndex >= 0) {
      endIndex = queryIndex;
    }
    if (hashIndex >= 0 && hashIndex < endIndex) {
      endIndex = hashIndex;
    }
    return rawName.substring(0, endIndex);
  }

  private isVideoMediaItem(item: VideoItem): boolean {
    if (item.mimeType && item.mimeType.toLowerCase().startsWith('video/')) {
      return true;
    }
    const fileNameForCheck: string = this.resolveFileNameForTypeCheck(item);
    return Utility.isVideoByExtension(fileNameForCheck);
  }

  private refreshThumbItem(item: VideoItem): void {
    const dataIndex: number = this.dataSource.dataArray.indexOf(item);
    if (dataIndex >= 0) {
      this.dataSource.notifyDataChange(dataIndex);
    }
  }

  private getDisplayedFolderCount(): number {
    return this.isSearchMode ? this.filteredFolderList.length : this.visibleFoldersState.length
  }

  private stopScheduledRemoteThumbPrefetch(): void {
    if (this.scheduledThumbPrefetchTimer >= 0) {
      clearTimeout(this.scheduledThumbPrefetchTimer)
      this.scheduledThumbPrefetchTimer = -1
    }
  }

  // 保留当前视口索引，但让新的列表内容可以重新触发同一可见区间的封面补全。
  private invalidateRemoteThumbPrefetchRange(): void {
    this.stopScheduledRemoteThumbPrefetch()
    this.thumbnailTaskToken += 1
    this.thumbnailRunningKeys.clear()
    this.lastVisibleThumbStart = -1
    this.lastVisibleThumbEndExclusive = -1
  }

  // 列表数据源切换时需要显式取消旧任务，避免后台继续为已经离开的可见区生成封面。
  private resetRemoteThumbPrefetchState(): void {
    this.invalidateRemoteThumbPrefetchRange()
    this.visibleListStartIndex = -1
    this.visibleListEndIndex = -1
  }

  private updateVisibleRemoteThumbRange(start: number, end: number): void {
    this.visibleListStartIndex = start
    this.visibleListEndIndex = end
    this.scheduleRemoteThumbPrefetch()
  }

  private async prepareRemoteThumbSource(item: VideoItem): Promise<RemoteThumbSource> {
    let playUrl: string = item.filePath;
    if (StrUtil.isNotEmpty(playUrl)) {
      const lowerPath = playUrl.toLowerCase();
      const isDirectPath = lowerPath.startsWith('http://') || lowerPath.startsWith('https://') ||
        lowerPath.startsWith('/') || lowerPath.startsWith('file://');
      if (!isDirectPath) {
        try {
          playUrl = await setVideoUrlForSong(item, {
            extractCover: false,
            extractLyric: false,
            extractAudioInfo: false
          });
        } catch (error) {
          Logger.warn(TAG, `解析缩略图播放地址失败 name=${item.name}, error=${(error as Error).message}`);
        }
      }
    }
    const headers: Map<string, string> = await this.webdavManager.buildHttpHeadersWithAccountId(item, playUrl);
    const source: RemoteThumbSource = {
      playUrl: playUrl,
      headers: headers
    };
    return source;
  }

  private async tryResolveRemoteMusicCover(item: VideoItem, token: number): Promise<void> {
    if (item.isCustomCover === 1 && StrUtil.isNotEmpty(item.pixelMapPath)) {
      this.refreshThumbItem(item);
      return;
    }
    const coverPath: string = await this.resolveRemoteThumbPath(item);
    if (this.isThumbCacheValid(coverPath)) {
      mergeCoverWithPriority(item, this.normalizeThumbImageSource(coverPath));
      this.refreshThumbItem(item);
      return;
    }
    this.removeInvalidThumbCache(coverPath);
    const source: RemoteThumbSource = await this.prepareRemoteThumbSource(item);
    if (StrUtil.isEmpty(source.playUrl)) {
      return;
    }
    const headersArg: string = this.buildFfmpegHeadersArg(source.headers);
    const rawCommands: string[] = this.buildRemoteAudioCoverFfmpegCmd(source.playUrl, headersArg, coverPath);
    const commands: string[] = this.sanitizeFfmpegCommands(rawCommands);
    if (commands.length < 2) {
      return;
    }
    await this.runSerializedThumbnailFfmpeg(async (): Promise<void> => {
      if (token !== this.thumbnailTaskToken) {
        return;
      }
      await this.executeSafeFfmpeg(commands);
    });
    if (token !== this.thumbnailTaskToken) {
      return;
    }
    if (this.isThumbCacheValid(coverPath)) {
      mergeCoverWithPriority(item, this.normalizeThumbImageSource(coverPath));
      this.refreshThumbItem(item);
    }
  }

  private async generateRemoteVideoThumb(item: VideoItem, token: number): Promise<void> {
    if (token !== this.thumbnailTaskToken) {
      return;
    }
    const identity: string = this.buildThumbnailIdentity(item);
    if (this.thumbnailRunningKeys.has(identity)) {
      return;
    }
    this.thumbnailRunningKeys.add(identity);
    try {
      const isVideoFile: boolean = this.isVideoMediaItem(item);
      if (!isVideoFile) {
        await this.tryResolveRemoteMusicCover(item, token);
        return;
      }
      const thumbPath: string = await this.resolveRemoteThumbPath(item);
      if (this.isThumbCacheValid(thumbPath)) {
        mergeCoverWithPriority(item, this.normalizeThumbImageSource(thumbPath));
        this.refreshThumbItem(item);
        return;
      }
      this.removeInvalidThumbCache(thumbPath);
      const source = await this.prepareRemoteThumbSource(item);
      if (StrUtil.isEmpty(source.playUrl)) {
        return;
      }
      const headersArg: string = this.buildFfmpegHeadersArg(source.headers);
      const rawCommands: string[] = this.buildRemoteThumbFfmpegCmd(source.playUrl, headersArg, thumbPath);
      const commands: string[] = this.sanitizeFfmpegCommands(rawCommands);
      if (commands.length < 2) {
        return;
      }
      await this.runSerializedThumbnailFfmpeg(async (): Promise<void> => {
        if (token !== this.thumbnailTaskToken) {
          return;
        }
        await this.executeSafeFfmpeg(commands);
      });
      if (token !== this.thumbnailTaskToken) {
        return;
      }
      if (this.isThumbCacheValid(thumbPath)) {
        mergeCoverWithPriority(item, this.normalizeThumbImageSource(thumbPath));
        this.refreshThumbItem(item);
      }
    } catch (error) {
      const err: Error = error as Error;
      Logger.info(TAG, `远程缩略图/封面生成失败 name=${item.name}, error=${err.message}`);
    } finally {
      this.thumbnailRunningKeys.delete(identity);
    }
  }

  private scheduleRemoteThumbPrefetch(): void {
    if (this.isLoading || this.isRefreshingCache) {
      this.stopScheduledRemoteThumbPrefetch()
      this.thumbnailTaskToken += 1
      this.thumbnailRunningKeys.clear()
      return
    }
    const totalSongs: number = this.dataSource.totalCount()
    const visibleWindow = buildWebDavVisibleThumbPrefetchWindow(totalSongs, this.getDisplayedFolderCount(),
      this.visibleListStartIndex, this.visibleListEndIndex)
    if (!visibleWindow.hasVisibleSongs) {
      this.stopScheduledRemoteThumbPrefetch()
      this.thumbnailTaskToken += 1
      this.thumbnailRunningKeys.clear()
      return
    }
    const range: WebDavThumbPrefetchRange = visibleWindow.range
    const isSameVisibleRange: boolean = range.start === this.lastVisibleThumbStart &&
      range.endExclusive === this.lastVisibleThumbEndExclusive
    if (isSameVisibleRange) {
      return
    }
    this.lastVisibleThumbStart = range.start
    this.lastVisibleThumbEndExclusive = range.endExclusive
    this.stopScheduledRemoteThumbPrefetch()
    const token: number = this.thumbnailTaskToken + 1
    this.thumbnailTaskToken = token
    this.thumbnailRunningKeys.clear()
    this.scheduledThumbPrefetchTimer = setTimeout((): void => {
      this.scheduledThumbPrefetchTimer = -1
      if (token !== this.thumbnailTaskToken) {
        return
      }
      const mediaItems: VideoItem[] = this.dataSource.dataArray.slice(range.start, range.endExclusive)
      if (mediaItems.length <= 0) {
        return
      }
      void this.runRemoteThumbPrefetchQueue(mediaItems, token)
    }, WEBDAV_VISIBLE_THUMB_PREFETCH_DELAY_MS)
  }

  private async runRemoteThumbPrefetchQueue(items: VideoItem[], token: number): Promise<void> {
    for (let index: number = 0; index < items.length; index += 1) {
      if (token !== this.thumbnailTaskToken) {
        return;
      }
      const item: VideoItem = items[index];
      if (StrUtil.isNotEmpty(item.pixelMapPath)) {
        const currentThumbRef: string = item.pixelMapPath ? item.pixelMapPath : '';
        if (currentThumbRef.startsWith('http')) {
          continue;
        }
        const currentThumbPath: string = this.normalizeThumbLocalPath(currentThumbRef);
        if (StrUtil.isNotEmpty(currentThumbPath) && this.isThumbCacheValid(currentThumbPath)) {
          continue;
        }
      }
      await this.generateRemoteVideoThumb(item, token);
    }
  }

  // 更新可见文件夹列表
  private updateVisibleFolders(): void {
    try {
      // 安全检查webDavFiles
      if (!this.webDavFiles || !Array.isArray(this.webDavFiles)) {
        this.visibleFoldersState = [];
        return;
      }

      const allFolders = this.webDavFiles.filter(f => f.isDirectory);
      const isFlatFolderAccount = this.selectedAccount?.webType === RemoteDriveType.Navidrome
        || this.selectedAccount?.webType === RemoteDriveType.Jellyfin
        || this.selectedAccount?.webType === RemoteDriveType.Emby;
      if (isFlatFolderAccount) {
        const sortedNavFolders = allFolders.sort((a, b) => a.fileName.localeCompare(b.fileName));
        this.visibleFoldersState = sortedNavFolders;
        return;
      }
      const visible: FileInfo[] = [];

      for (let i = 0; i < allFolders.length; i++) {
        const folder = allFolders[i];

        // 安全检查folder对象
        if (!folder || typeof folder.fileName !== 'string') {
          continue;
        }

        let shouldShow = this.isDirectChildOfCurrentPath(folder);

        if (shouldShow) {
          visible.push(folder);
        }
      }
      console.log('更新文件夹列表:', visible);

      this.visibleFoldersState = visible;
    } catch (error) {
      Logger.error(TAG, '更新文件夹列表失败:', error.toString());
      this.visibleFoldersState = [];

    }

    this.isShowTitleBar = true

  }

  private isSongSelected(song: VideoItem): boolean {
    return this.selectedSongs.some(item => item.filePath === song.filePath);
  }

  private resolveFolderSelectionKey(folder: FileInfo): string {
    return folder.href;
  }

  private isFolderSelected(folder: FileInfo): boolean {
    const key = this.resolveFolderSelectionKey(folder);
    return this.selectedFolders.some(item => this.resolveFolderSelectionKey(item) === key);
  }

  private getSelectableSongs(): VideoItem[] {
    return this.isSearchMode ? this.filteredList : this.songs;
  }

  private getSelectableFolders(): FileInfo[] {
    return this.isSearchMode ? this.filteredFolderList : this.visibleFoldersState;
  }

  private getSelectedEntryCount(): number {
    return this.selectedSongs.length + this.selectedFolders.length;
  }

  private hasSelectedFolders(): boolean {
    return this.selectedFolders.length > 0;
  }

  private canOperateOnSelectedSongs(): boolean {
    return this.selectedSongs.length > 0 && !this.hasSelectedFolders() && !this.isDeletingSelection;
  }

  private updateAllSelectedState(): void {
    const totalSelectable = this.getSelectableSongs().length + this.getSelectableFolders().length;
    const totalSelected = this.getSelectedEntryCount();
    this.isAllSelected = totalSelected > 0 && totalSelected === totalSelectable;
  }

  private enterMultiSelect(song: VideoItem): void {
    if (!this.isMultiSelect) {
      this.isMultiSelect = true;
      this.selectedSongs = [song];
      this.selectedFolders = [];
      this.updateAllSelectedState();
      return;
    }
    if (!this.isSongSelected(song)) {
      this.toggleSongSelection(song);
    }
  }

  private toggleSongSelection(song: VideoItem): void {
    if (!this.isMultiSelect) {
      this.isMultiSelect = true;
    }
    const exists = this.isSongSelected(song);
    if (exists) {
      const next = this.selectedSongs.filter(item => item.filePath !== song.filePath);
      this.selectedSongs = next;
      this.updateAllSelectedState();
      if (next.length === 0) {
        if (this.selectedFolders.length === 0) {
          this.exitMultiSelect();
        }
      }
    } else {
      const next = [...this.selectedSongs, song];
      this.selectedSongs = next;
      this.updateAllSelectedState();
    }
  }

  private handleCheckboxSelection(song: VideoItem, checked: boolean): void {
    if (this.ignoreTapAfterExitMultiSelect) {
      return;
    }
    if (!this.isMultiSelect) {
      this.isMultiSelect = true;
    }
    const exists = this.isSongSelected(song);
    if (checked && !exists) {
      this.toggleSongSelection(song);
    } else if (!checked && exists) {
      this.toggleSongSelection(song);
    }
  }

  private enterFolderMultiSelect(folder: FileInfo): void {
    if (!this.isMultiSelect) {
      this.isMultiSelect = true;
      this.selectedFolders = [folder];
      this.selectedSongs = [];
      this.updateAllSelectedState();
      return;
    }
    if (!this.isFolderSelected(folder)) {
      this.toggleFolderSelection(folder);
    }
  }

  private toggleFolderSelection(folder: FileInfo): void {
    if (!this.isMultiSelect) {
      this.isMultiSelect = true;
    }
    const key = this.resolveFolderSelectionKey(folder);
    const exists = this.selectedFolders.some(item => this.resolveFolderSelectionKey(item) === key);
    if (exists) {
      const next = this.selectedFolders.filter(item => this.resolveFolderSelectionKey(item) !== key);
      this.selectedFolders = next;
      this.updateAllSelectedState();
      if (next.length === 0 && this.selectedSongs.length === 0) {
        this.exitMultiSelect();
      }
    } else {
      this.selectedFolders = [...this.selectedFolders, folder];
      this.updateAllSelectedState();
    }
  }

  private handleFolderCheckboxSelection(folder: FileInfo, checked: boolean): void {
    if (this.ignoreTapAfterExitMultiSelect) {
      return;
    }
    if (!this.isMultiSelect) {
      this.isMultiSelect = true;
    }
    const exists = this.isFolderSelected(folder);
    if (checked && !exists) {
      this.toggleFolderSelection(folder);
    } else if (!checked && exists) {
      this.toggleFolderSelection(folder);
    }
  }

  private toggleSelectAll(): void {
    if (this.isAllSelected) {
      this.selectedSongs = [];
      this.selectedFolders = [];
      this.isAllSelected = false;
      return;
    }
    if (!this.isMultiSelect) {
      this.isMultiSelect = true;
    }
    this.selectedSongs = this.getSelectableSongs().slice();
    this.selectedFolders = this.getSelectableFolders().slice();
    this.updateAllSelectedState();
  }

  private exitMultiSelect(): void {
    this.ignoreTapAfterExitMultiSelect = true;
    this.isMultiSelect = false;
    this.selectedSongs = [];
    this.selectedFolders = [];
    this.isAllSelected = false;
    setTimeout(() => {
      this.isMultiSelect = false;
      this.ignoreTapAfterExitMultiSelect = false;
    }, 180);
    console.info('onecold this.isMultiSelect ' + this.isMultiSelect)
  }

  private syncSelectionAfterRefresh(): void {
    if (!this.isMultiSelect) {
      return;
    }
    const currentSongKeys: Set<string> = new Set(this.getSelectableSongs().map(item => item.filePath));
    const filteredSongs = this.selectedSongs.filter(item => currentSongKeys.has(item.filePath));
    if (filteredSongs.length !== this.selectedSongs.length) {
      this.selectedSongs = filteredSongs;
    }
    const currentFolderKeys: Set<string> = new Set(
      this.getSelectableFolders().map(item => this.resolveFolderSelectionKey(item))
    );
    const filteredFolders = this.selectedFolders.filter(item =>
      currentFolderKeys.has(this.resolveFolderSelectionKey(item))
    );
    if (filteredFolders.length !== this.selectedFolders.length) {
      this.selectedFolders = filteredFolders;
    }
    this.updateAllSelectedState();
    if (filteredSongs.length === 0 && filteredFolders.length === 0) {
      this.exitMultiSelect();
    }
  }

  private confirmDeleteSelected(): void {
    if (!this.selectedAccount) {
      this.getUIContext().getPromptAction().showToast({ message: `请先选择${getRemoteDriveAccountLabel()}` });
      return;
    }
    const totalSelected = this.getSelectedEntryCount();
    if (!this.isMultiSelect || totalSelected === 0) {
      this.getUIContext().getPromptAction().showToast({ message: '请先选择要删除的文件或文件夹' });
      return;
    }
    this.getUIContext().showAlertDialog({
      title: '删除项目',
      message: `确定删除选中的${totalSelected}项吗？`,
      primaryButton: {
        value: '取消',
        action: () => {}
      },
      secondaryButton: {
        value: '删除',
        fontColor: Color.Red,
        action: () => {
          void this.performDeleteSelected();
        }
      }
    });
  }

  private async performDeleteSelected(): Promise<void> {
    if (!this.selectedAccount || this.getSelectedEntryCount() === 0) {
      return;
    }
    this.isDeletingSelection = true;
    try {
      if (this.selectedSongs.length > 0) {
        await this.webdavManager.deleteRemoteSongs(this.selectedAccount, this.selectedSongs.slice());
      }
      if (this.selectedFolders.length > 0) {
        await this.webdavManager.deleteRemoteFolders(this.selectedAccount, this.selectedFolders.slice());
      }
      this.removeSongsLocally(this.selectedSongs.slice())
      this.removeFoldersLocally(this.selectedFolders.slice())
      this.exitMultiSelect();
      this.getUIContext().getPromptAction().showToast({ message: '删除成功' });
    } catch (error) {
      const err = error as Error;
      this.getUIContext().getPromptAction().showToast({ message: `删除失败: ${err.message}` });
    } finally {
      this.isDeletingSelection = false;
    }
  }

  private confirmDeleteSingleSong(song: VideoItem): void {
    if (!this.selectedAccount) {
      this.getUIContext().getPromptAction().showToast({ message: `请先选择${getRemoteDriveAccountLabel()}` });
      return;
    }
    this.getUIContext().showAlertDialog({
      title: '删除文件',
      message: `确定删除 "${song.name}" 吗？`,
      primaryButton: {
        value: '取消',
        action: () => {}
      },
      secondaryButton: {
        value: '删除',
        fontColor: Color.Red,
        action: () => {
          void this.performDeleteSingleSong(song);
        }
      }
    });
  }

  private async performDeleteSingleSong(song: VideoItem): Promise<void> {
    if (!this.selectedAccount) {
      return;
    }
    this.isDeletingSelection = true;
    try {
      await this.webdavManager.deleteRemoteSongs(this.selectedAccount, [song]);
      this.removeSongsLocally([song])
      this.getUIContext().getPromptAction().showToast({ message: '删除成功' });
    } catch (error) {
      const err = error as Error;
      this.getUIContext().getPromptAction().showToast({ message: `删除失败: ${err.message}` });
    } finally {
      this.isDeletingSelection = false;
    }
  }

  private getRemoteFolderDisplayName(folder: FileInfo): string {
    return decodeUrlEncodedString((folder.fileName ?? folder.name ?? '').replace(/\/+$/, ''));
  }

  private confirmDeleteSingleFolder(folder: FileInfo): void {
    if (!this.selectedAccount) {
      this.getUIContext().getPromptAction().showToast({ message: `请先选择${getRemoteDriveAccountLabel()}` });
      return;
    }
    this.getUIContext().showAlertDialog({
      title: '删除文件夹',
      message: `确定删除 "${this.getRemoteFolderDisplayName(folder)}" 吗？`,
      primaryButton: {
        value: '取消',
        action: () => {}
      },
      secondaryButton: {
        value: '删除',
        fontColor: Color.Red,
        action: () => {
          void this.performDeleteSingleFolder(folder);
        }
      }
    });
  }

  private async performDeleteSingleFolder(folder: FileInfo): Promise<void> {
    if (!this.selectedAccount) {
      return;
    }
    this.isDeletingSelection = true;
    try {
      await this.webdavManager.deleteRemoteFolders(this.selectedAccount, [folder]);
      this.removeFoldersLocally([folder])
      this.getUIContext().getPromptAction().showToast({ message: '删除成功' });
    } catch (error) {
      const err = error as Error;
      this.getUIContext().getPromptAction().showToast({ message: `删除失败: ${err.message}` });
    } finally {
      this.isDeletingSelection = false;
    }
  }

  private removeDisplayedRemoteSongsByKeys(keys: Set<string>): void {
    for (let index = this.dataSource.dataArray.length - 1; index >= 0; index--) {
      const item = this.dataSource.dataArray[index]
      if (item && keys.has(item.filePath)) {
        this.dataSource.deleteData(index)
      }
    }
  }

  private syncGlobalWebdavQueueAfterSongRemoval(keys: Set<string>): void {
    if (keys.size <= 0 || !ArrayUtil.isNotEmpty(globalWebdavVideoItems)) {
      return
    }
    const nextQueue = globalWebdavVideoItems.filter((item: VideoItem) => !keys.has(item.filePath))
    if (nextQueue.length === globalWebdavVideoItems.length) {
      return
    }
    const currentPath = this.currentSong?.filePath ?? '';
    let nextIndex = nextQueue.findIndex((item: VideoItem) => item.filePath === currentPath)
    if (nextIndex < 0) {
      nextIndex = nextQueue.length > 0 ? Math.min(globalWebdavCurrentPlayIndex, nextQueue.length - 1) : 0
    }
    globalWebdavVideoItems = nextQueue
    globalWebdavCurrentPlayIndex = nextIndex
    const eventQueueRefresh: emitter.InnerEvent = { eventId: EventConstants.EVENT_PLAY_QUEUE_REFRESH }
    emitter.emit(eventQueueRefresh, { data: { source: 'webdav-delete' } })
  }

  private removeSongsLocally(songs: VideoItem[]): void {
    if (ArrayUtil.isEmpty(songs)) {
      return
    }
    const keys: Set<string> = new Set<string>(songs.map((item: VideoItem) => item.filePath))
    this.songs = this.songs.filter((item: VideoItem) => !keys.has(item.filePath))
    this.webdavManager.webDavSongs = this.songs.slice()
    this.filteredList = this.filteredList.filter((item: VideoItem) => !keys.has(item.filePath))
    this.removeDisplayedRemoteSongsByKeys(keys)
    this.syncGlobalWebdavQueueAfterSongRemoval(keys)
    if (this.isSearchMode && this.searchText.length > 0) {
      this.syncSelectionAfterRefresh()
    } else {
      this.syncSelectionAfterRefresh()
    }
    this.invalidateRemoteThumbPrefetchRange()
    this.scheduleRemoteThumbPrefetch()
  }

  private removeFoldersLocally(folders: FileInfo[]): void {
    if (ArrayUtil.isEmpty(folders)) {
      return
    }
    const keys: Set<string> = new Set<string>(folders.map((item: FileInfo) => this.resolveFolderSelectionKey(item)))
    this.webDavFiles = this.webDavFiles.filter((item: FileInfo) => !keys.has(this.resolveFolderSelectionKey(item)))
    this.webdavManager.webDavFiles = this.webDavFiles.slice()
    this.visibleFoldersState = this.visibleFoldersState.filter((item: FileInfo) =>
      !keys.has(this.resolveFolderSelectionKey(item)))
    this.filteredFolderList = this.filteredFolderList.filter((item: FileInfo) =>
      !keys.has(this.resolveFolderSelectionKey(item)))
    if (this.isSearchMode && this.searchText.length > 0) {
      this.refreshDisplaySongs(this.filteredList)
    } else {
      this.updateVisibleFolders()
    }
    this.syncSelectionAfterRefresh()
  }

  @Builder
  private buildSwipeDeleteAction(onDelete: () => void) {
    Button() {
      Image($r('app.media.delete2'))
        .fillColor(Color.White)
        .width(20)
        .height(20)
    }
    .width(56)
    .height(56)
    .type(ButtonType.Circle)
    .backgroundColor('#E53935')
    .margin(8)
    .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.86 })
    .onClick(() => {
      onDelete()
    })
  }

  private canRenameRemoteSong(song: VideoItem): boolean {
    return song.type === CommonConstants.TYPE_WEBDAV ||
      song.type === CommonConstants.TYPE_SMB ||
      song.type === CommonConstants.TYPE_FTP ||
      song.type === CommonConstants.TYPE_BAIDU;
  }

  private canRenameRemoteFolder(): boolean {
    return !!this.selectedAccount &&
      (this.selectedAccount.webType === RemoteDriveType.WebDav ||
        this.selectedAccount.webType === RemoteDriveType.Smb ||
        this.selectedAccount.webType === RemoteDriveType.Ftp ||
        this.selectedAccount.webType === RemoteDriveType.Baidu);
  }

  private getRemoteSongRenameFileName(song: VideoItem): string {
    const rawName = StrUtil.isNotEmpty(song.fileName) ? song.fileName as string : song.name;
    return decodeUrlEncodedString(rawName ?? '');
  }

  private getRemoteSongRenameExtension(song: VideoItem): string {
    const fileName = this.getRemoteSongRenameFileName(song);
    const lastDotIndex = fileName.lastIndexOf('.');
    if (lastDotIndex <= 0) {
      return '';
    }
    return fileName.substring(lastDotIndex);
  }

  private async resolveSongAccountForAction(song: VideoItem): Promise<WebDavAccount | null> {
    if (song.webdav_account_id) {
      const account = await this.webdavManager.getWebDavAccountById(song.webdav_account_id);
      if (account) {
        return account;
      }
    }
    return this.selectedAccount ?? null;
  }

  private showRenameSongDialog(song: VideoItem): void {
    if (!this.canRenameRemoteSong(song)) {
      this.getUIContext().getPromptAction().showToast({ message: '当前文件暂不支持重命名' });
      return;
    }
    const extension = this.getRemoteSongRenameExtension(song);
    const currentThemeColor = this.themeColor;
    this.renameSongDialogController = new CustomDialogController({
      builder: CreateFolderDialog({
        onConfirm: (fileName: string) => {
          if (fileName.trim().length > 0) {
            void this.performRenameRemoteSong(song, fileName.trim());
          } else {
            this.getUIContext().getPromptAction().showToast({ message: '文件名称不能为空' });
          }
        },
        onCancel: () => {
        },
        initialName: this.getRemoteSongRenameFileName(song),
        title: '重命名',
        placeholder: extension.length > 0 ? `请输入文件名称，保留 ${extension} 格式` : '请输入文件名称',
        confirmText: '确定',
        cancelText: '取消',
        themeColor: currentThemeColor
      }),
      autoCancel: true,
      alignment: DialogAlignment.Center,
      customStyle: false
    });
    this.renameSongDialogController.open();
  }

  private showRenameFolderDialog(folder: FileInfo): void {
    if (!this.canRenameRemoteFolder()) {
      this.getUIContext().getPromptAction().showToast({ message: '当前文件夹暂不支持重命名' });
      return;
    }
    const currentThemeColor = this.themeColor;
    this.renameSongDialogController = new CustomDialogController({
      builder: CreateFolderDialog({
        onConfirm: (folderName: string) => {
          if (folderName.trim().length > 0) {
            void this.performRenameRemoteFolder(folder, folderName.trim());
          } else {
            this.getUIContext().getPromptAction().showToast({ message: '文件夹名称不能为空' });
          }
        },
        onCancel: () => {
        },
        initialName: this.getRemoteFolderDisplayName(folder),
        title: '重命名',
        placeholder: '请输入文件夹名称',
        confirmText: '确定',
        cancelText: '取消',
        themeColor: currentThemeColor
      }),
      autoCancel: true,
      alignment: DialogAlignment.Center,
      customStyle: false
    });
    this.renameSongDialogController.open();
  }

  private async performRenameRemoteSong(song: VideoItem, content: string): Promise<void> {
    const nextName = content ? content.trim() : '';
    if (!nextName) {
      this.getUIContext().getPromptAction().showToast({ message: '文件名称不能为空' });
      return;
    }
    const currentFileName = this.getRemoteSongRenameFileName(song);
    if (nextName === currentFileName) {
      return;
    }
    const account = await this.resolveSongAccountForAction(song);
    if (!account) {
      this.getUIContext().getPromptAction().showToast({ message: `请先选择${getRemoteDriveAccountLabel()}` });
      return;
    }
    this.isLoading = true;
    try {
      await this.webdavManager.renameRemoteSong(account, song, nextName);
      await this.webdavManager.loadFilesInfoFromAccount(account, this.currentDirectoryPath || account.filepath || '/');
      this.getUIContext().getPromptAction().showToast({ message: '重命名成功' });
    } catch (error) {
      const err = error as Error;
      this.getUIContext().getPromptAction().showToast({ message: `重命名失败: ${err.message}` });
    } finally {
      this.isLoading = false;
    }
  }

  private async performRenameRemoteFolder(folder: FileInfo, content: string): Promise<void> {
    const nextName = content ? content.trim().replace(/\/+$/, '') : '';
    if (!nextName) {
      this.getUIContext().getPromptAction().showToast({ message: '文件夹名称不能为空' });
      return;
    }
    const currentFolderName = this.getRemoteFolderDisplayName(folder);
    if (nextName === currentFolderName) {
      return;
    }
    if (!this.selectedAccount) {
      this.getUIContext().getPromptAction().showToast({ message: `请先选择${getRemoteDriveAccountLabel()}` });
      return;
    }
    this.isLoading = true;
    try {
      await this.webdavManager.renameRemoteFolder(this.selectedAccount, folder, nextName);
      await this.webdavManager.loadFilesInfoFromAccount(this.selectedAccount,
        this.currentDirectoryPath || this.selectedAccount.filepath || '/');
      this.getUIContext().getPromptAction().showToast({ message: '重命名成功' });
    } catch (error) {
      const err = error as Error;
      this.getUIContext().getPromptAction().showToast({ message: `重命名失败: ${err.message}` });
    } finally {
      this.isLoading = false;
    }
  }

  private addSongToNextPlay(song: VideoItem): void {
    if (!song) {
      return;
    }
    const displayQueue: VideoItem[] = this.getCurrentPlaybackQueue();
    const queue: VideoItem[] = globalWebdavVideoItems && globalWebdavVideoItems.length > 0 ?
      globalWebdavVideoItems : displayQueue;
    if (!queue || queue.length === 0) {
      this.getUIContext().getPromptAction().showToast({ message: '当前列表为空' });
      return;
    }

    const currentPath = this.currentSong?.filePath;
    if (StrUtil.isEmpty(currentPath)) {
      const targetIndex = displayQueue.findIndex((item: VideoItem) => item.filePath === song.filePath);
      if (targetIndex >= 0) {
        this.playSong(song, targetIndex, false);
        this.getUIContext().getPromptAction().showToast({ message: '已开始播放' });
      }
      return;
    }

    if (currentPath === song.filePath) {
      this.getUIContext().getPromptAction().showToast({ message: '当前正在播放这首歌' });
      return;
    }

    let currentIndex = queue.findIndex((item: VideoItem) => item.filePath === currentPath);
    if (currentIndex < 0 && globalWebdavCurrentPlayIndex >= 0 && globalWebdavCurrentPlayIndex < queue.length) {
      currentIndex = globalWebdavCurrentPlayIndex;
    }
    if (currentIndex < 0) {
      currentIndex = 0;
    }

    const existIndex = queue.findIndex((item: VideoItem) => item.filePath === song.filePath);
    if (existIndex >= 0) {
      const movedSong = queue.splice(existIndex, 1)[0];
      if (existIndex < currentIndex) {
        currentIndex -= 1;
      }
      queue.splice(currentIndex + 1, 0, movedSong);
    } else {
      queue.splice(currentIndex + 1, 0, song);
    }

    globalWebdavCurrentPlayIndex = currentIndex;
    globalWebdavVideoItems = queue;
    this.songs = [...queue];
    this.dataSource.pushArrayData(this.songs);
    const eventQueueRefresh: emitter.InnerEvent = { eventId: EventConstants.EVENT_PLAY_QUEUE_REFRESH };
    emitter.emit(eventQueueRefresh, { data: { source: 'webdav' } });
    this.getUIContext().getPromptAction().showToast({ message: '已添加到下一首播放' });
  }

  private cloneSongForDb(song: VideoItem): VideoItem {
    const dbSong = new VideoItem(
      song.name || '',
      song.id || song.filePath,
      song.filePath,
      song.type,
      song.videoSize || 0,
      song.cTime || Utility.getFormatDateStr(new Date(), 'yyyy-MM-dd HH:mm')
    );
    dbSong.parentPath = song.parentPath;
    dbSong.isFav = song.isFav;
    dbSong.size = song.size;
    dbSong.pixelMapPath = song.pixelMapPath;
    dbSong.isCustomCover = song.isCustomCover;
    dbSong.artist = song.artist;
    dbSong.album = song.album;
    dbSong.fileName = song.fileName;
    dbSong.duration = song.duration;
    dbSong.mimeType = song.mimeType;
    dbSong.sampleRate = song.sampleRate;
    dbSong.trackCount = song.trackCount;
    dbSong.lastPlayedStr = song.lastPlayedStr;
    dbSong.playCount = song.playCount;
    dbSong.lyricContent = song.lyricContent;
    dbSong.md5Str = song.md5Str;
    dbSong.extra_json = song.extra_json;
    dbSong.pyStr = song.pyStr;
    dbSong.bit_rate = song.bit_rate;
    dbSong.probe_score = song.probe_score;
    dbSong.year = song.year;
    dbSong.nb_streams = song.nb_streams;
    dbSong.nb_programs = song.nb_programs;
    dbSong.genre = song.genre;
    dbSong.track = song.track;
    dbSong.bits_per_raw_sample = song.bits_per_raw_sample;
    dbSong.channels = song.channels;
    dbSong.channel_layout = song.channel_layout;
    dbSong.start_time = song.start_time;
    dbSong.ALBUMARTIST = song.ALBUMARTIST;
    dbSong.COMPOSER = song.COMPOSER;
    dbSong.LYRICIST = song.LYRICIST;
    dbSong.COMMENT = song.COMMENT;
    dbSong.disc = song.disc;
    dbSong.webdav_account_id = song.webdav_account_id;
    dbSong.remote_rel_path = song.remote_rel_path;
    dbSong.navArtistId = song.navArtistId;
    dbSong.navAlbumId = song.navAlbumId;
    dbSong.baiduFsId = song.baiduFsId;
    dbSong.webdav_id = song.webdav_id;
    dbSong.lyricIndex = song.lyricIndex;
    return dbSong;
  }

  private emitPlaylistRefresh(): void {
    emitter.emit({ eventId: EventConstants.EVENT_PLAYLIST_REFRESH }, {});
  }

  private buildPlaylistSongCandidates(songs: VideoItem[]): VideoItem[] {
    if (!songs || songs.length <= 0) {
      return [];
    }
    const result: VideoItem[] = [];
    const existedPaths: Set<string> = new Set<string>();
    for (let index: number = 0; index < songs.length; index += 1) {
      const song = songs[index];
      if (!song || StrUtil.isEmpty(song.filePath)) {
        continue;
      }
      if (existedPaths.has(song.filePath)) {
        continue;
      }
      existedPaths.add(song.filePath);
      result.push(song);
    }
    return result;
  }

  private async resolvePlaylistSongPaths(mediaTable: MediaTable, songs: VideoItem[]): Promise<string[]> {
    const paths: string[] = [];
    for (let index: number = 0; index < songs.length; index += 1) {
      const song: VideoItem = songs[index];
      const songForDb: VideoItem = this.cloneSongForDb(song);
      if (!songForDb.webdav_account_id && this.selectedAccount?.id) {
        songForDb.webdav_account_id = this.selectedAccount.id.toString();
      }
      if (StrUtil.isEmpty(songForDb.id)) {
        songForDb.id = songForDb.remote_rel_path || songForDb.filePath;
      }
      if (StrUtil.isEmpty(songForDb.remote_rel_path)) {
        songForDb.remote_rel_path = songForDb.id || songForDb.filePath;
      }
      if (StrUtil.isEmpty(songForDb.parentPath) && songForDb.filePath.includes('/')) {
        const pathIndex = songForDb.filePath.lastIndexOf('/');
        if (pathIndex > 0) {
          songForDb.parentPath = songForDb.filePath.substring(0, pathIndex);
        }
      }

      const saved: boolean = await mediaTable.saveOrUpdateWebDavItem(songForDb);
      if (!saved) {
        Logger.warn(TAG, `歌曲入库失败，跳过加入歌单: ${songForDb.filePath}`);
        continue;
      }
      const storedSong: VideoItem | null = await mediaTable.queryVideoByFilePath(songForDb.filePath);
      if (storedSong && StrUtil.isNotEmpty(storedSong.filePath)) {
        paths.push(storedSong.filePath);
      }
    }

    const uniquePaths: string[] = [];
    const pathSet: Set<string> = new Set<string>();
    for (let index: number = 0; index < paths.length; index += 1) {
      const path = paths[index];
      if (StrUtil.isEmpty(path) || pathSet.has(path)) {
        continue;
      }
      pathSet.add(path);
      uniquePaths.push(path);
    }
    return uniquePaths;
  }

  private async openSongsAddToPlaylistDialog(songs: VideoItem[]): Promise<void> {
    const candidateSongs: VideoItem[] = this.buildPlaylistSongCandidates(songs);
    if (candidateSongs.length <= 0) {
      this.getUIContext().getPromptAction().showToast({ message: '请选择要加入歌单的歌曲' });
      return;
    }

    try {
      const uiContext = this.getUIContext();
      const hostCtx = uiContext ? uiContext.getHostContext() : undefined;
      if (!hostCtx) {
        this.getUIContext().getPromptAction().showToast({ message: '无法获取上下文' });
        return;
      }

      const playlistTable: PlaylistTable = new PlaylistTable(hostCtx);
      const mediaTable: MediaTable = new MediaTable(hostCtx);

      await new Promise<void>((resolve) => {
        mediaTable.getRdbStore(hostCtx, () => resolve());
      });

      const playlistSongPaths: string[] = await this.resolvePlaylistSongPaths(mediaTable, candidateSongs);
      if (playlistSongPaths.length <= 0) {
        this.getUIContext().getPromptAction().showToast({ message: '歌曲入库失败，无法添加到歌单' });
        return;
      }

      const resolveSuccessToast = (): string => {
        if (playlistSongPaths.length > 1) {
          return `已添加${playlistSongPaths.length}首到歌单`;
        }
        return '已添加到歌单';
      };

      const openDialog = async (): Promise<void> => {
        const playlists: Playlist[] = await playlistTable.queryAllPlaylists();
        showAddToPlaylistDialog(
          candidateSongs,
          playlists,
          async (playlistId: string) => {
            const success = await playlistTable.addSongsToPlaylist(playlistId, playlistSongPaths);
            if (success) {
              this.emitPlaylistRefresh();
            }
            this.getUIContext().getPromptAction().showToast({ message: success ? resolveSuccessToast() : '歌曲已在该歌单中' });
          },
          () => {},
          () => {
            showCreatePlaylistDialog(
              async (name: string, description: string, coverPath?: string) => {
                const created = await playlistTable.createPlaylist(name, description, coverPath);
                if (!created) {
                  this.getUIContext().getPromptAction().showToast({ message: '歌单创建失败' });
                  return;
                }
                const target = await playlistTable.queryPlaylistByName(name);
                if (!target) {
                  this.getUIContext().getPromptAction().showToast({ message: '未找到新建歌单' });
                  return;
                }
                const addSuccess = await playlistTable.addSongsToPlaylist(target.id, playlistSongPaths);
                if (addSuccess) {
                  this.emitPlaylistRefresh();
                }
                this.getUIContext().getPromptAction().showToast({ message: addSuccess ? resolveSuccessToast() : '歌曲已在该歌单中' });
              },
              () => {}
            );
          }
        );
      };

      await openDialog();
    } catch (error) {
      const err = error as Error;
      Logger.error(TAG, `打开添加到歌单失败: ${err.message}`);
      this.getUIContext().getPromptAction().showToast({ message: '添加到歌单失败' });
    }
  }

  private async openSelectedSongsAddToPlaylistDialog(): Promise<void> {
    if (!this.isMultiSelect || this.selectedSongs.length <= 0) {
      this.getUIContext().getPromptAction().showToast({ message: '请先选择歌曲' });
      return;
    }
    await this.openSongsAddToPlaylistDialog(this.selectedSongs.slice());
  }

  private async openSongAddToPlaylistDialog(song: VideoItem): Promise<void> {
    if (!song) {
      return;
    }
    await this.openSongsAddToPlaylistDialog([song]);
  }

  private sanitizeDownloadFileName(fileName: string): string {
    const trimmed = (fileName || '').trim();
    const sanitized = trimmed.replace(/[\\/:*?"<>|]/g, '_');
    return sanitized.length > 0 ? sanitized : '未知歌曲.mp3';
  }

  private resolveDownloadFileName(song: VideoItem, sourceUrlOrPath: string): string {
    if (StrUtil.isNotEmpty(song.fileName)) {
      return this.sanitizeDownloadFileName(song.fileName as string);
    }
    if (StrUtil.isNotEmpty(song.name) && (song.name as string).includes('.')) {
      return this.sanitizeDownloadFileName(song.name as string);
    }
    if (StrUtil.isNotEmpty(sourceUrlOrPath)) {
      const purePath = sourceUrlOrPath.split('?')[0];
      const lastSlash = purePath.lastIndexOf('/');
      if (lastSlash >= 0 && lastSlash < purePath.length - 1) {
        const urlName = purePath.substring(lastSlash + 1);
        if (StrUtil.isNotEmpty(urlName)) {
          return this.sanitizeDownloadFileName(urlName);
        }
      }
    }
    const baseName = StrUtil.isNotEmpty(song.name) ? song.name as string : '未知歌曲';
    return this.sanitizeDownloadFileName(`${baseName}.mp3`);
  }

  private buildUniqueDownloadPath(downloadDir: string, fileName: string): string {
    const safeName = this.sanitizeDownloadFileName(fileName);
    const dotIndex = safeName.lastIndexOf('.');
    const hasExt = dotIndex > 0;
    const namePart = hasExt ? safeName.substring(0, dotIndex) : safeName;
    const extPart = hasExt ? safeName.substring(dotIndex) : '';
    let targetPath = `${downloadDir}/${safeName}`;
    let suffix = 1;
    while (FileUtil.accessSync(targetPath)) {
      targetPath = `${downloadDir}/${namePart}(${suffix})${extPart}`;
      suffix += 1;
    }
    return targetPath;
  }

  private async pickDownloadRootPath(): Promise<string> {
    try {
      const documentViewPicker = new picker.DocumentViewPicker();
      const documentSaveResult = await documentViewPicker.save({ pickerMode: picker.DocumentPickerMode.DOWNLOAD });
      if (!documentSaveResult || documentSaveResult.length === 0) {
        return '';
      }
      const resolvedPath = new fileUri.FileUri(documentSaveResult[0]).path;
      this.rootPath = resolvedPath;
      return resolvedPath;
    } catch (error) {
      const err = error as Error;
      Logger.error(TAG, `选择下载目录失败: ${err.message}`);
      return '';
    }
  }

  private async ensureDownloadDirectory(): Promise<string> {
    let basePath = this.rootPath;
    if (StrUtil.isEmpty(basePath) || !FileUtil.accessSync(basePath)) {
      basePath = await this.pickDownloadRootPath();
    }
    if (StrUtil.isEmpty(basePath)) {
      return '';
    }
    const downloadDir = `${basePath}/${this.downloadFolderName}`;
    if (!FileUtil.accessSync(downloadDir)) {
      await fileIo.mkdir(downloadDir);
    }
    return downloadDir;
  }

  private async upsertDownloadedSongToLibrary(targetPath: string, sourceSong: VideoItem): Promise<void> {
    if (StrUtil.isEmpty(targetPath) || !FileUtil.accessSync(targetPath)) {
      return;
    }
    try {
      const pageContext = getContext(this);
      const mediaModule = await import('../common/util/MediaTable');
      const mediaTable = new mediaModule.default(pageContext);
      await new Promise<void>((resolve) => {
        mediaTable.getRdbStore(pageContext, () => resolve());
      });

      const exists = await mediaTable.isRecordExists(targetPath);
      if (exists) {
        return;
      }

      let mediaItem: VideoItem;
      try {
        mediaItem = await Utility.readMetaInfoFFmpeg(pageContext, targetPath, CommonConstants.TYPE_LOCAL, false);
      } catch (error) {
        Logger.warn(TAG, `下载歌曲读取元数据失败，使用兜底入库: ${(error as Error).message}`);
        mediaItem = new VideoItem(
          sourceSong.name || FileUtil.getFileName(targetPath),
          targetPath,
          targetPath,
          CommonConstants.TYPE_LOCAL,
          0,
          Utility.getFormatDateStr(new Date(), 'yyyy-MM-dd HH:mm')
        );
        mediaItem.fileName = FileUtil.getFileName(targetPath);
        mediaItem.artist = sourceSong.artist;
        mediaItem.album = sourceSong.album;
      }

      mediaItem.id = targetPath;
      mediaItem.filePath = targetPath;
      mediaItem.type = CommonConstants.TYPE_LOCAL;
      if (StrUtil.isEmpty(mediaItem.fileName)) {
        mediaItem.fileName = FileUtil.getFileName(targetPath);
      }
      if (StrUtil.isEmpty(mediaItem.name)) {
        mediaItem.name = mediaItem.fileName as string;
      }
      if (StrUtil.isEmpty(mediaItem.parentPath)) {
        mediaItem.parentPath = FileUtil.getParentPath(targetPath);
      }

      await new Promise<void>((resolve) => {
        mediaTable.insert(mediaItem, () => resolve());
      });
      emitter.emit({ eventId: EventConstants.EVENT_SCAN_UPDATE }, {});
    } catch (error) {
      Logger.error(TAG, `下载歌曲入库失败: ${(error as Error).message}`);
    }
  }

  private openDownloadCenter(): void {
    this.syncDownloadCenterTasks();
    this.isShowDownloadCenter = true;
  }

  private syncDownloadCenterTasks(): void {
    this.downloadCenterActiveTasks = this.downloadCenterManager.getActiveTasks();
    this.downloadCenterCompletedTasks = this.downloadCenterManager.getCompletedTasks();
  }

  private scheduleDownloadCenterRefresh(): void {
    if (this.downloadCenterRefreshTimer >= 0) {
      return;
    }
    this.downloadCenterRefreshTimer = setTimeout((): void => {
      this.downloadCenterRefreshTimer = -1;
      this.syncDownloadCenterTasks();
      this.downloadCenterRefreshVersion += 1;
    }, 0);
  }

  private stopDownloadCenterRefresh(): void {
    if (this.downloadCenterRefreshTimer >= 0) {
      clearTimeout(this.downloadCenterRefreshTimer);
      this.downloadCenterRefreshTimer = -1;
    }
  }

  private resolveSongDownloadSizeText(song: VideoItem): string {
    if (StrUtil.isNotEmpty(song.size)) {
      return decodeUrlEncodedString(song.size as string);
    }
    if (song.videoSize > 0) {
      return this.formatDownloadBytes(song.videoSize);
    }
    return '';
  }

  private parseSizeTextToBytes(sizeText: string): number {
    if (StrUtil.isEmpty(sizeText)) {
      return 0;
    }
    const normalized = sizeText.trim();
    const match = normalized.match(/([0-9]+(?:\.[0-9]+)?)\s*(B|KB|MB|GB|TB)/i);
    if (!match) {
      return 0;
    }
    const value = parseFloat(match[1]);
    if (!Number.isFinite(value) || value <= 0) {
      return 0;
    }
    const unit = match[2].toUpperCase();
    const factor = this.resolveUnitFactor(unit);
    return Math.floor(value * factor);
  }

  private resolveUnitFactor(unit: string): number {
    switch (unit) {
      case 'KB':
        return 1024;
      case 'MB':
        return 1024 * 1024;
      case 'GB':
        return 1024 * 1024 * 1024;
      case 'TB':
        return 1024 * 1024 * 1024 * 1024;
      case 'B':
      default:
        return 1;
    }
  }

  private formatDownloadBytes(bytes: number): string {
    if (!Number.isFinite(bytes) || bytes <= 0) {
      return '';
    }
    const units: string[] = ['B', 'KB', 'MB', 'GB', 'TB'];
    let size: number = bytes;
    let index: number = 0;
    while (size >= 1024 && index < units.length - 1) {
      size /= 1024;
      index += 1;
    }
    const precision: number = index === 0 ? 0 : 2;
    return `${size.toFixed(precision)} ${units[index]}`;
  }

  private pauseDownloadTask(taskId: string): void {
    if (StrUtil.isEmpty(taskId)) {
      return;
    }
    this.downloadCenterManager.pauseTask(taskId);
  }

  private resumeDownloadTask(taskId: string): void {
    if (StrUtil.isEmpty(taskId)) {
      return;
    }
    this.downloadCenterManager.resumeTask(taskId);
  }

  private deleteDownloadTask(taskId: string): void {
    if (StrUtil.isEmpty(taskId)) {
      return;
    }
    this.downloadCenterManager.deleteTask(taskId);
    this.syncDownloadCenterTasks();
    this.downloadCenterRefreshVersion += 1;
  }

  private buildDownloadedVideoItem(task: DownloadCenterTask): VideoItem {
    const fileName = StrUtil.isNotEmpty(task.fileName) ? task.fileName : FileUtil.getFileName(task.targetPath);
    const title = StrUtil.isNotEmpty(task.title) ? task.title : fileName;
    const item = new VideoItem(
      title,
      task.targetPath,
      task.targetPath,
      CommonConstants.TYPE_LOCAL,
      task.totalBytes,
      '',
      task.sizeText,
      task.coverPath,
      undefined,
      undefined,
      fileName
    );
    item.parentPath = StrUtil.isNotEmpty(task.downloadDir) ? task.downloadDir : FileUtil.getParentPath(task.targetPath);
    item.pixelMapPath = task.coverPath;
    item.size = task.sizeText;
    item.videoSize = task.totalBytes;
    item.type = CommonConstants.TYPE_LOCAL;
    return item;
  }

  private playCompletedDownloadTask(taskId: string): void {
    if (StrUtil.isEmpty(taskId)) {
      return;
    }
    const playableTasks = this.downloadCenterCompletedTasks.filter((task: DownloadCenterTask): boolean => {
      return StrUtil.isNotEmpty(task.targetPath)
    });
    const playlist: VideoItem[] = playableTasks.map((task: DownloadCenterTask): VideoItem => {
      return this.buildDownloadedVideoItem(task)
    });

    if (playlist.length <= 0) {
      this.getUIContext().getPromptAction().showToast({ message: '没有可播放的下载文件' });
      return;
    }

    const startIndex = playableTasks.findIndex((task: DownloadCenterTask): boolean => {
      return task.taskId === taskId;
    });

    if (startIndex < 0 || startIndex >= playlist.length) {
      this.getUIContext().getPromptAction().showToast({ message: '未找到对应下载任务' });
      return;
    }

    setWebdavPlaylist(playlist, startIndex);
    void this.playbackController.playQueue(playlist.slice(), startIndex, 'controller-open').catch((error: Error) => {
      Logger.error(TAG, `下载中心播放失败: ${error.message}`);
      this.getUIContext().getPromptAction().showToast({ message: '播放失败' });
    });


  }

  private async resolveSongDownloadSourceUrl(song: VideoItem): Promise<string> {
    if (song.type === CommonConstants.TYPE_BAIDU && song.webdav_account_id) {
      try {
        const account = await this.webdavManager.getWebDavAccountById(song.webdav_account_id);
        if (account) {
          const dlink = await this.webdavManager.getBaiduDownloadUrl(account, song);
          if (StrUtil.isNotEmpty(dlink)) {
            Logger.info(TAG, `下载中心使用百度直链下载: ${song.name}`);
            return dlink;
          }
        }
      } catch (error) {
        Logger.warn(TAG, `百度下载直链获取失败，回退播放地址: ${(error as Error).message}`);
      }
    }

    if (song.type === CommonConstants.TYPE_WEBDAV) {
      try {
        let account: WebDavAccount | null = null;
        if (song.webdav_account_id) {
          account = await this.webdavManager.getWebDavAccountById(song.webdav_account_id);
        }
        if (!account && this.selectedAccount?.webType === RemoteDriveType.WebDav) {
          account = this.selectedAccount;
        }
        if (account) {
          const relativePath = song.remote_rel_path || song.filePath;
          const fullUrl = WebDavUrlUtil.buildFullUrl(account, relativePath);
          if (StrUtil.isNotEmpty(fullUrl)) {
            Logger.info(TAG, `下载中心使用WebDAV直链下载: ${song.name}, url=${fullUrl}`);
            return fullUrl;
          }
        }
      } catch (error) {
        Logger.warn(TAG, `WebDAV下载直链构建失败，回退播放地址: ${(error as Error).message}`);
      }
    }

    return setVideoUrlForSong(song, {
      context: getContext(this),
      autoParseMusicName: false,
      extractCover: false,
      extractLyric: false,
      extractAudioInfo: false
    });
  }

  private async buildDownloadRequestHeaders(song: VideoItem, sourceUrl: string): Promise<Map<string, string>> {
    if (song.type === CommonConstants.TYPE_BAIDU) {
      const headers = new Map<string, string>();
      // 参考 BaiduFileCache 下载链路，避免复用播放头导致 Range 行为异常
      headers.set('User-Agent', 'pan.baidu.com');
      headers.set('Accept', '*/*');
      headers.set('Connection', 'Keep-Alive');
      return headers;
    }
    return this.webdavManager.buildHttpHeadersWithAccountId(song, sourceUrl);
  }

  private async enqueueSongDownloadWithDirectory(song: VideoItem, downloadDir: string): Promise<string> {
    if (!song) {
      throw new Error('歌曲不存在');
    }
    if (StrUtil.isEmpty(downloadDir)) {
      throw new Error('未选择下载目录');
    }
    const sourceUrl = await this.resolveSongDownloadSourceUrl(song);
    const normalizedSource = sourceUrl.startsWith('file://') ? new fileUri.FileUri(sourceUrl).path : sourceUrl;
    const fileName = this.resolveDownloadFileName(song, normalizedSource);
    const targetPath = this.buildUniqueDownloadPath(downloadDir, fileName);
    const sizeText = this.resolveSongDownloadSizeText(song);
    const expectedBytes = this.parseSizeTextToBytes(sizeText);
    const requestHeaders = await this.buildDownloadRequestHeaders(song, sourceUrl);
    const coverPath = song.pixelMapPath ?? '';

    this.downloadCenterManager.enqueueDownload({
      title: song.name || fileName,
      fileName: fileName,
      coverPath: coverPath,
      sizeText: sizeText,
      expectedBytes: expectedBytes,
      sourceUrl: sourceUrl,
      targetPath: targetPath,
      downloadDir: downloadDir,
      headers: requestHeaders,
      onCompleted: async () => {
        await this.upsertDownloadedSongToLibrary(targetPath, song);
      }
    });
    return fileName;
  }

  private async enqueueSongDownload(song: VideoItem): Promise<void> {
    if (!song) {
      return;
    }
    try {
      const downloadDir = await this.ensureDownloadDirectory();
      if (StrUtil.isEmpty(downloadDir)) {
        this.getUIContext().getPromptAction().showToast({ message: '未选择下载目录' });
        return;
      }
      const fileName: string = await this.enqueueSongDownloadWithDirectory(song, downloadDir);
      this.openDownloadCenter();
      this.getUIContext().getPromptAction().showToast({ message: `已加入下载队列: ${fileName}` });
    } catch (error) {
      const err = error as Error;
      Logger.error(TAG, `加入下载队列失败: ${err.message}`);
      this.getUIContext().getPromptAction().showToast({ message: `下载任务创建失败: ${err.message}` });
    }
  }

  private async enqueueSelectedSongsDownload(): Promise<void> {
    if (!this.isMultiSelect || this.selectedSongs.length <= 0) {
      this.getUIContext().getPromptAction().showToast({ message: '请先选择要下载的歌曲' });
      return;
    }

    const candidates: VideoItem[] = this.buildPlaylistSongCandidates(this.selectedSongs.slice());
    if (candidates.length <= 0) {
      this.getUIContext().getPromptAction().showToast({ message: '没有可下载的歌曲' });
      return;
    }

    try {
      const downloadDir = await this.ensureDownloadDirectory();
      if (StrUtil.isEmpty(downloadDir)) {
        this.getUIContext().getPromptAction().showToast({ message: '未选择下载目录' });
        return;
      }

      let successCount: number = 0;
      let failedCount: number = 0;

      for (let index: number = 0; index < candidates.length; index += 1) {
        const song: VideoItem = candidates[index];
        try {
          await this.enqueueSongDownloadWithDirectory(song, downloadDir);
          successCount += 1;
        } catch (error) {
          failedCount += 1;
          const err = error as Error;
          Logger.error(TAG, `批量下载入队失败: ${(song.name || song.fileName || song.filePath)}, ${err.message}`);
        }
      }

      if (successCount > 0) {
        this.openDownloadCenter();
        this.exitMultiSelect();
      }

      if (successCount > 0 && failedCount <= 0) {
        this.getUIContext().getPromptAction().showToast({ message: `已加入下载队列: ${successCount}首` });
        return;
      }
      if (successCount > 0) {
        this.getUIContext().getPromptAction().showToast({ message: `已加入下载队列${successCount}首，失败${failedCount}首` });
        return;
      }
      this.getUIContext().getPromptAction().showToast({ message: '下载任务创建失败' });
    } catch (error) {
      const err = error as Error;
      Logger.error(TAG, `批量下载失败: ${err.message}`);
      this.getUIContext().getPromptAction().showToast({ message: `批量下载失败: ${err.message}` });
    }
  }

  private buildSongMetaLine(song: VideoItem): string {
    const parts: string[] = [];
    if (StrUtil.isNotEmpty(song.duration)) {
      parts.push(song.duration as string);
    } else if (StrUtil.isNotEmpty(song.size)) {
      parts.push(decodeUrlEncodedString(song.size as string));
    }
    if (parts.length === 0 && StrUtil.isNotEmpty(song.cTime)) {
      parts.push(song.cTime as string);
    }
    return parts.join(' · ');
  }

  private buildSongQualityLabel(song: VideoItem): string {
    if (!song || StrUtil.isEmpty(song.md5Str)) {
      return '';
    }
    const quality = song.md5Str as string;
    return quality.includes('Lossless') ? '无损' : quality;
  }

  // 对话框控制器
  private accountDialogController: CustomDialogController | null = null;
  // 保存事件处理器引用，用于取消订阅
  private eventHandler: (event: string) => void = (event: string) => {
    this.handleWebdavEvent(event);
  };

  initSetting(){
    this.isCustomizeBg  = PreferencesUtil.getBooleanSync(SettingPage.IS_CUSTOMIZE_BG, false)
    this.isHomeBgFollowMusicCover = PreferencesUtil.getBooleanSync(SettingPage.IS_HOME_BG_FOLLOW_MUSIC_COVER, true)
    this.customizeBgPath  = PreferencesUtil.getStringSync(SettingPage.IS_CUSTOMIZE_BG_PATH, '')
    this.blurValue = PreferencesUtil.getNumberSync(SettingPage.CUSTOMIZE_BG_BLUR, 0)
    this.bgBrightness = PreferencesUtil.getNumberSync(SettingPage.BG_BRIGHTNESS, 0)
    this.isShowFileName = PreferencesUtil.getBooleanSync('isShowFileName', false)
    this.isLongNameRoLL = PreferencesUtil.getBooleanSync('isLongNameRoLL', true)
    this.sortType = PreferencesUtil.getNumberSync('webDavSortType', 0)
    this.isShowTitleBar = PreferencesUtil.getBooleanSync(SettingPage.IS_SHOW_TITLTBAR, true)
    this.autoHideTitle = PreferencesUtil.getBooleanSync('autoHideTitle', true)
    this.syncCustomizeMusicBgPath()
  }

  private onHomeBgCurrentSongChange(): void {
    this.syncCustomizeMusicBgPath()
  }

  private syncCustomizeMusicBgPath(): void {
    if (!this.isHomeBgFollowMusicCover) {
      return
    }
    const coverPath: string = this.currentSong?.pixelMapPath ?? ''
    AppStorage.setOrCreate('customizeMusicBgPath', coverPath)
  }

  private isMusicCoverHomeBackgroundActive(): boolean {
    return this.isHomeBgFollowMusicCover && this.customizeMusicBgPath.length > 0
  }
  aboutToAppear(): void {
    Utility.getAppName(getContext(this)).then((appName: string) => {
      this.appName = appName
    })
    this.initSetting()
    let eventSetting: emitter.InnerEvent = { eventId: 333 }
    // 监听广播事件（通用设置配置更新）
    emitter.on(eventSetting, (eventData: emitter.EventData) => {
      this.initSetting()
    });

    // 加载账户列表
    this.loadAccounts();

    this.loadFiles()

    this.breadcrumbs = this.webdavManager.getBreadcrumbs();

    // 订阅WebDAV状态变化
    this.webdavManager.subscribe(this.eventHandler);
    this.downloadCenterManager.subscribe(this.downloadCenterListener);
    this.subscribeWebDavMetadataUpdates();


    // 监听手势返回事件
    let eventBackSwipeBack: emitter.InnerEvent = { eventId: EventConstants.EVENT_SWIPE_BACK_DISK }
    emitter.on(eventBackSwipeBack, (eventData: emitter.EventData) => {
      console.info('onecold', ' 收到 EVENT_SWIPE_BACK_DISK 事件');
      // 如果在详情视图模式,退出详情视图
      this.goBack()
    });
  }


  aboutToDisappear(): void {
    // 取消订阅
    this.cancelPendingDirectoryRefresh();
    this.resetRemoteThumbPrefetchState();
    this.stopDirectoryNavigationLoading();
    this.webdavManager.unsubscribe(this.eventHandler);
    this.downloadCenterManager.unsubscribe(this.downloadCenterListener);
    this.stopDownloadCenterRefresh();
    emitter.off(EventConstants.EVENT_WEBDAV_METADATA_UPDATED);
  }

  // 处理WebDAV事件
  private handleWebdavEvent(event: string): void {
    switch (event) {
      case RemoteDriveManagerStates.LoadFilesInfoStart:
        this.resetRemoteThumbPrefetchState();
        this.startDirectoryNavigationLoading();
        if (this.dataSource.totalCount() > 0 || this.visibleFoldersState.length > 0) {
          this.isLoading = false;
          this.isRefreshingCache = true;
        } else {
          this.isLoading = true;
          this.isRefreshingCache = false;
        }
        break;
      case RemoteDriveManagerStates.LoadFilesInfoSucceed:
        const shouldScrollToTop: boolean = !this.isRefreshingCache;
        this.resetRemoteThumbPrefetchState();
        this.songs = this.webdavManager.webDavSongs;
        // 直接引用webdavManager的数组，避免@Observed序列化问题
        this.webDavFiles = this.webdavManager.webDavFiles;
        this.currentDirectoryPath = this.webdavManager.currentPath || '/';
        this.isLoading = false;
        this.isRefreshingCache = false;
        this.stopDirectoryNavigationLoading();

        // 更新可见文件夹列表
        this.updateVisibleFolders();
        this.breadcrumbs = this.webdavManager.getBreadcrumbs();
        this.syncSelectionAfterRefresh();
        if (this.isSearchMode && this.searchText.length > 0) {
          void this.applyGlobalSearch(this.searchText, ++this.searchTicket);
        } else {
          this.restoreCurrentDirectorySearchView(shouldScrollToTop);
        }

        // promptAction.showToast({
        //   message: '加载成功: ' + this.webDavFiles.filter(f => f.isDirectory).length + '个文件夹, ' + this.songs.length + '首歌曲'
        // });
        break;
      case RemoteDriveManagerStates.LoadFilesInfoFailed:
        this.isLoading = false;
        this.isRefreshingCache = false;
        this.stopDirectoryNavigationLoading();
        // this.getUIContext().getPromptAction().showToast({ message: '加载失败' });
        break;
      case RemoteDriveManagerStates.InsertAccountSucceed:
      case RemoteDriveManagerStates.EditAccountSucceed:
      case RemoteDriveManagerStates.RemoveAccountSucceed:
        this.loadAccounts();
        break;
      case RemoteDriveManagerStates.GlobalSearchIndexBuildStart:
      case RemoteDriveManagerStates.GlobalSearchIndexUpdated:
      case RemoteDriveManagerStates.GlobalSearchIndexReady:
        if (this.isSearchMode && this.searchText.length > 0) {
          void this.applyGlobalSearch(this.searchText, ++this.searchTicket);
        }
        break;
      case RemoteDriveManagerStates.GlobalSearchIndexFailed:
        this.isSearchLoading = false;
        break;
    }
  }

  private subscribeWebDavMetadataUpdates(): void {
    emitter.on(this.metadataUpdateEvent, (eventData: emitter.EventData) => {
      const payloads = eventData?.data as WebDavMetadataUpdatePayload[] | undefined;
      if (!payloads || payloads.length === 0) {
        Logger.info(TAG, 'WebDav metadata event received but payload empty');
        return;
      }
      Logger.info(TAG, `WebDav metadata event payload count: ${payloads.length}`);
      this.handleWebDavMetadataUpdates(payloads);
    });
  }

  private handleWebDavMetadataUpdates(payloads: WebDavMetadataUpdatePayload[]): void {
    if (!payloads || payloads.length === 0) {
      return;
    }
    Logger.info(TAG, 'handleWebDavMetadataUpdates start');
    const changedIndices: number[] = [];
    for (let i = 0; i < payloads.length; i++) {
      const payload = payloads[i];
      if (!payload || !payload.filePath) {
        continue;
      }
      Logger.info(TAG, `WebDav metadata detail path=${payload.pixelMapPath ?? 'null'}`);
      const changedIndex = this.updateSongMetadata(payload);
      if (changedIndex >= 0) {
        if (changedIndices.indexOf(changedIndex) < 0) {
          changedIndices.push(changedIndex);
        }
        Logger.info(TAG, `metadata updated for ${payload.filePath}`);
      }
    }
    if (changedIndices.length === 0) {
      Logger.info(TAG, 'handleWebDavMetadataUpdates no changes detected');
      return;
    }
    // 元数据回填只刷新变更行，避免后台补封面时整列表反复重建导致卡顿。
    for (let index = 0; index < changedIndices.length; index += 1) {
      const changedIndex = changedIndices[index];
      if (changedIndex >= 0 && changedIndex < this.dataSource.totalCount()) {
        this.dataSource.notifyDataChange(changedIndex);
      }
    }
    Logger.info(TAG, 'handleWebDavMetadataUpdates trigger refresh');
  }

  private updateSongMetadata(payload: WebDavMetadataUpdatePayload): number {
    if (!payload.filePath) {
      return -1;
    }
    const targetIndex = this.findSongIndex(payload.filePath);
    if (targetIndex < 0) {
      return -1;
    }
    const targetSong = this.songs[targetIndex];
    let mutated = false;
    if (mergeCoverWithPriority(targetSong, payload.pixelMapPath, payload.isCustomCover ?? 0)) {
      mutated = true;
    }
    if (payload.md5Str && payload.md5Str.length > 0 && targetSong.md5Str !== payload.md5Str) {
      targetSong.md5Str = payload.md5Str;
      mutated = true;
    }
    if (payload.name && payload.name.length > 0) {
      targetSong.name = payload.name;
      mutated = true;
    }
    if (payload.artist && payload.artist.length > 0) {
      targetSong.artist = payload.artist;
      mutated = true;
    }
    return mutated ? targetIndex : -1;
  }

  private findSongIndex(filePath: string): number {
    for (let i = 0; i < this.songs.length; i++) {
      if (this.songs[i].filePath === filePath) {
        return i;
      }
    }
    return -1;
  }

  // 加载账户列表
  private loadAccounts(): void {
    this.accounts = this.webdavManager.getAllWebDavAccounts();

  }

  // 加载文件列表
  private loadFiles(): void {
    if (!this.selectedAccount) {
      this.getUIContext().getPromptAction().showToast({ message: '请先选择账户' });
      return;
    }
    console.info('heanup '+this.selectedAccount.name+'type '+this.selectedAccount.webType)
    this.scheduleDirectoryRefresh(this.selectedAccount.filepath,
      () => this.webdavManager.loadFilesInfoFromAccount(this.selectedAccount), '加载文件失败')
  }

  // 进入文件夹
  private enterFolder(folder: FileInfo): void {
    const targetPath = this.webdavManager.prepareEnterFolder(folder)
    if (!targetPath || !this.selectedAccount) {
      return
    }
    Logger.info(TAG, `进入文件夹: current=${this.currentDirectoryPath}, target=${targetPath}`)
    this.scheduleDirectoryRefresh(targetPath,
      () => this.webdavManager.loadFilesInfoFromAccount(this.selectedAccount, targetPath), '进入文件夹失败')
  }

  // 检查是否为当前目录的直接子项
  private isDirectChildOfCurrentPath(folder: FileInfo): boolean {
    const currentPath = this.currentDirectoryPath || '';

    // 如果在根目录（currentPath为空或'/'），显示所有第一级文件夹
    if (currentPath === '' || currentPath === '/') {
      const folderPath = folder.href.replace(/\/$/, ''); // 去掉尾部斜杠
      return folder.href.startsWith('/') &&
             folder.href !== '/' &&
             !folderPath.substring(1).includes('/');
    }

    // 非根目录情况，计算相对路径
    let relativePath = folder.href;
    if (currentPath !== '/') {
      relativePath = folder.href.replace(currentPath, '');
    }
    relativePath = relativePath.replace(/^\//, '').replace(/\/$/, '');

    // 只有相对路径不为空且不包含/时才认为是直接子项
    return relativePath !== '' && !relativePath.includes('/');
  }

  // 返回上级目录
  private goBack(): void {
    if(this.webdavManager.canGoBack()){
      const previousPath = this.webdavManager.prepareGoBack()
      if (!previousPath || !this.selectedAccount) {
        return
      }
      Logger.info(TAG, `返回上级目录: current=${this.currentDirectoryPath}, previous=${previousPath}`)
      this.scheduleDirectoryRefresh(previousPath,
        () => this.webdavManager.loadFilesInfoFromAccount(this.selectedAccount, previousPath), '返回失败')
    }else{
      this.getUIContext().animateTo({ duration: 555 }, () => {
        // 动画闭包内控制Image组件的出现和消失
        this.isShowDrawer = !this.isShowDrawer
        this.offsetX = 0
      })
    }


  }

  // 切换账户
  private switchAccount(account: WebDavAccount): void {
    this.selectedAccount = account;
    this.songs = [];
    this.updateListData(this.songs)
  }

  private getCurrentPlaybackQueue(): VideoItem[] {
    if (this.isSearchMode && this.searchText.length > 0 && this.filteredList.length > 0) {
      return this.filteredList;
    }
    return this.songs;
  }

  private resolveSongPlayIndex(song: VideoItem, fallbackIndex: number, queue: VideoItem[]): number {
    if (queue.length <= 0) {
      return -1;
    }
    if (song && StrUtil.isNotEmpty(song.filePath)) {
      for (let i = 0; i < queue.length; i++) {
        if (queue[i].filePath === song.filePath) {
          return i;
        }
      }
    }
    if (fallbackIndex >= 0 && fallbackIndex < queue.length) {
      return fallbackIndex;
    }
    return 0;
  }

  // 播放WebDAV歌曲
  private playSong(song: VideoItem, index: number,isJump:boolean=false): void {
    try {
      const queue: VideoItem[] = this.getCurrentPlaybackQueue();
      Logger.info(TAG, `heanup === WebDAV playSong 方法被调用 ===`);
      Logger.info(TAG, 'heanup 播放指定歌曲: ' + song.name + ', 索引: ' + index);
      Logger.info(TAG, 'heanup 播放队列长度: ' + queue.length);
      const playIndex = this.resolveSongPlayIndex(song, index, queue);
      if (playIndex < 0 || playIndex >= queue.length) {
        this.getUIContext().getPromptAction().showToast({ message: '播放失败，未找到歌曲' });
        Logger.warn(TAG, `heanup 无法定位播放索引: fallback=${index}, songPath=${song.filePath}`);
        return;
      }
      if (playIndex !== index) {
        Logger.info(TAG, `heanup 修正播放索引: fallback=${index}, real=${playIndex}, song=${song.name}`);
      }

      // 检查歌曲是否有webdav_account_id
      Logger.info(TAG, `heanup 播放歌曲的webdav_account_id: ${song.webdav_account_id || '未设置'}`);

      // 确保所有歌曲都设置了正确的webdav_account_id
      if (this.selectedAccount && this.selectedAccount.id) {
        const accountIds = queue.map(s => s.webdav_account_id).filter(id => id);
        Logger.info(TAG, `heanup 当前歌曲列表中有 ${accountIds.length}/${queue.length} 首歌曲设置了webdav_account_id`);

        // 如果发现歌曲缺少webdav_account_id，立即设置
        queue.forEach((item) => {
          if (!item.webdav_account_id) {
            item.webdav_account_id = this.selectedAccount!.id.toString();
            Logger.info(TAG, `heanup 为歌曲 "${item.name}" 设置webdav_account_id: ${item.webdav_account_id}`);
          }
        });
      }

      const videoItems: VideoItem[] = queue.slice();
      setWebdavPlaylist(videoItems, playIndex);

      Logger.info(TAG, `heanup 保存WebDAV歌曲到全局内存，长度: ${videoItems.length}, 索引: ${playIndex}`);

      void this.playbackController.playQueue(
        videoItems,
        playIndex,
        isJump ? 'controller-open' : 'webdav-main'
      ).then(() => {
        Logger.info(TAG, `heanup WebDAV 直连播放成功，索引: ${playIndex}`);
      }).catch((error: Error) => {
        Logger.error(TAG, `播放歌曲失败: ${error.message}`);
        this.getUIContext().getPromptAction().showToast({ message: '播放失败' });
      });


    } catch (error) {
      const err = error as Error;
      Logger.error(TAG, '播放歌曲失败: ' + err.message);
      this.getUIContext().getPromptAction().showToast({ message: '播放失败' });
    }
  }

  /**
   * 一键创建歌单：将当前WebDAV歌曲全部加入新歌单
   */
  private async createPlaylistFromCurrentWebDav(): Promise<void> {
    try {
      Logger.info(TAG, 'heanup 一键创建歌单开始');
      if (!this.selectedAccount || !this.selectedAccount.id) {
        this.getUIContext().getPromptAction().showToast({ message: `请先选择${getRemoteDriveAccountLabel()}` });
        return;
      }
      if (!this.songs || this.songs.length === 0) {
        // 回退到manager内的歌曲（可能还未复制到页面state）
        this.songs = this.webdavManager.webDavSongs;
        Logger.info(TAG, `heanup 页面songs为空，回退webdavManager.webDavSongs，长度=${this.songs.length}`);
        if (this.songs.length === 0) {
          this.getUIContext().getPromptAction().showToast({ message: '当前目录没有可添加的歌曲' });
          return;
        }
      }
      Logger.info(TAG, `heanup 歌单创建前歌曲数量: ${this.songs.length}`);

      // 确保每首歌都有webdav_account_id
      for (let i = 0; i < this.songs.length; i++) {
        if (!this.songs[i].webdav_account_id) {
          this.songs[i].webdav_account_id = this.selectedAccount.id.toString();
        }
      }

      // 构建歌单名称：账户名 + 当前路径（简化）
      const rawPath = this.currentDirectoryPath || '/';
      const shortPath = rawPath === '/' ? '根目录' : rawPath.replace(/\/$/, '').split('/').slice(-1)[0];
      const playlistName = `${getRemoteDrivePlaylistPrefix(this.selectedAccount.webType)}-${this.selectedAccount.name}-${shortPath}`;

      // 创建歌单
      // 安全获取HostContext
      const uiContext = this.getUIContext();
      const hostCtx = uiContext ? uiContext.getHostContext() : undefined;
      if (!hostCtx) {
        this.getUIContext().getPromptAction().showToast({ message: '无法获取上下文' });
        return;
      }
      const playlistModule = await import('../common/util/PlaylistTable');
      const mediaModule = await import('../common/util/MediaTable');
      const playlistTable = new playlistModule.default(hostCtx);
      const mediaTable = new mediaModule.default(hostCtx);

      // 等待MediaTable底层RDB初始化完成
      await new Promise<void>((resolve) => {
        mediaTable.getRdbStore(hostCtx, () => {
          Logger.info(TAG, 'heanup mediaTable RDB 初始化完成');
          resolve();
        });
      });

      // 先将WebDAV歌曲入库（若不存在）
      let upsertSuccess = 0;
      for (let i = 0; i < this.songs.length; i++) {
        const v = this.songs[i];
        if (!v.id || v.id === '') {
          // 使用filePath作为唯一ID
            v.id = v.filePath;
        }
        if (!v.parentPath) {
          const idxp = v.filePath.lastIndexOf('/');
          if (idxp > 0) {
            v.parentPath = v.filePath.substring(0, idxp);
          }
        }
        const ok = await mediaTable.upsertWebDavVideoItem(v);
        Logger.info(TAG, `heanup upsert 第${i+1}/${this.songs.length}首: ${v.filePath} => ${ok}`);
        if (ok) {
          upsertSuccess++;
        }
      }
      Logger.info(TAG, `heanup WebDAV歌曲入库完成: 成功 ${upsertSuccess}/${this.songs.length}`);
      // 先查询是否已有同名歌单，避免重复创建导致混淆
      const existing = await playlistTable.queryPlaylistByName(playlistName);
      if (existing) {
        this.getUIContext().getPromptAction().showToast({ message: '歌单已存在，直接追加歌曲' });
        const filePathsExist: string[] = this.songs.map(s => s.filePath);
        await playlistTable.addSongsToPlaylist(existing.id, filePathsExist);
        router.pushUrl({ url: 'pages/PlaylistDetailPage', params: { playlist: existing } });
        return;
      }
      Logger.info(TAG, `heanup 准备创建歌单: ${playlistName}`);
      const created = await playlistTable.createPlaylist(playlistName, `来自${getRemoteDriveDisplayLabel(this.selectedAccount.webType)}: ${this.selectedAccount.name} 路径: ${rawPath}`);
      if (!created) {
        this.getUIContext().getPromptAction().showToast({ message: '歌单创建失败' });
        return;
      }

      // 查询刚创建的歌单ID
      const target = await playlistTable.queryPlaylistByName(playlistName);
      if (!target) {
        this.getUIContext().getPromptAction().showToast({ message: '无法找到新建歌单' });
        return;
      }

      // 批量添加歌曲
      const filePaths: string[] = this.songs.map(s => s.filePath);
      Logger.info(TAG, `heanup 开始批量添加歌曲到歌单: ${target.id}`);
      const addResult = await playlistTable.addSongsToPlaylist(target.id, filePaths);
      Logger.info(TAG, `heanup 批量添加结果: ${addResult}`);
      if (!addResult) {
        Logger.warn(TAG, '批量添加歌曲返回false，可能全部已存在或写入失败');
      }

      this.getUIContext().getPromptAction().showToast({ message: `歌单创建成功: ${playlistName}` });
      Logger.info(TAG, `heanup 一键创建歌单成功: ${playlistName}, 添加 ${filePaths.length} 首歌曲`);

      // 跳转到歌单详情页面
      router.pushUrl({ url: 'pages/PlaylistDetailPage', params: { playlist: target } });
    } catch (error) {
      Logger.error(TAG, '一键创建歌单失败: ' + (error as Error).message);
      this.getUIContext().getPromptAction().showToast({ message: '一键创建歌单失败' });
    }
  }


  // 导航到指定层级的面包屑路径
  private async navigateToBreadcrumb(crumb: BreadcrumbItem): Promise<void> {
    if (!crumb) {
      return;
    }
    if (!this.selectedAccount) {
      return
    }
    const targetPath = this.webdavManager.prepareEnterFolderFromPath(crumb.path)
    Logger.info(TAG, `面包屑导航: current=${this.currentDirectoryPath}, target=${targetPath}`)
    this.scheduleDirectoryRefresh(targetPath, () => this.webdavManager.loadFilesInfoFromAccount(this.selectedAccount, targetPath),
      '导航到面包屑路径失败')
  }


  @Builder
  MoreMenuBuilder() {
    Menu() {

      MenuItem({
        symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.music_note_list')),
        content: $r('app.string.onekey_add_playlist')
      })
        .onClick(async () => {
          this.createPlaylistFromCurrentWebDav();
        })
      MenuItem({
        symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.arrow_up_to_line')),
        content: $r('app.string.upload_music_file')
      })
        .onClick(async () => {
          // this.navigateToUploadPage();
          this.isShowUploadFile = !this.isShowUploadFile
        })

      MenuItem({
        symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.download')),
        content: '下载中心'
      })
        .onClick(() => {
          this.openDownloadCenter();
        })

      MenuItem({
        symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.folder_badge_plus')),
        content: $r('app.string.create_foder')
      })
        .onClick(async () => {
            this.showCreateFolderDialog();
        })

    }.attributeModifier(new MenuModifier())
  }

  @Builder
  SortMenuBuilder() {
    Menu() {

      MenuItem({
        symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.text_and_arrow_up')),
        content: $r('app.string.sort_by_name'),
        symbolEndIcon: this.sortType === 0 ? new SymbolGlyphModifier($r('sys.symbol.checkmark')) : undefined
      })
        .backgroundColor(this.getSortItemBackground(0))
        .onClick(async () => {
          this.doSortType(0)
          PreferencesUtil.put("webDavSortType", 0)
        })
      MenuItem({
        symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.text_and_arrow_down')),
        content: '按名称降序',
        symbolEndIcon: this.sortType === 1 ? new SymbolGlyphModifier($r('sys.symbol.checkmark')) : undefined
      })
        .backgroundColor(this.getSortItemBackground(1))
        .onClick(async () => {
          this.doSortType(1)
          PreferencesUtil.put("webDavSortType", 1)
        })
      MenuItem({
        symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.clock')),
        content:'按时间升序',
        symbolEndIcon: this.sortType === 2 ? new SymbolGlyphModifier($r('sys.symbol.checkmark')) : undefined
      })
        .backgroundColor(this.getSortItemBackground(2))
        .onClick(async () => {
          this.doSortType(2)
          PreferencesUtil.put("webDavSortType", 2)
        })

      MenuItem({
        symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.timer')),
        content: '按时间降序',
        symbolEndIcon: this.sortType === 3 ? new SymbolGlyphModifier($r('sys.symbol.checkmark')) : undefined
      })
        .backgroundColor(this.getSortItemBackground(3))
        .onClick(async () => {
          this.doSortType(3)
          PreferencesUtil.put("webDavSortType", 3)

        })
      MenuItem({
        symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.text_and_arrow_up')),
        content:'按大小升序',
        symbolEndIcon: this.sortType === 4 ? new SymbolGlyphModifier($r('sys.symbol.checkmark')) : undefined
      })
        .backgroundColor(this.getSortItemBackground(4))
        .onClick(async () => {
          this.doSortType(4)
          PreferencesUtil.put("webDavSortType", 4)
        })

      MenuItem({
        symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.text_and_arrow_down')),
        content: '按大小降序',
        symbolEndIcon: this.sortType === 5 ? new SymbolGlyphModifier($r('sys.symbol.checkmark')) : undefined
      })
        .backgroundColor(this.getSortItemBackground(5))
        .onClick(async () => {
          this.doSortType(5)
          PreferencesUtil.put("webDavSortType", 5)

        })
    }.attributeModifier(new MenuModifier())
  }

  private sortSongsForType(target: Array<VideoItem>, index: number): Array<VideoItem> {
    switch (index) {
      case 0:
        Utility.doSortListAscending(target, this.isShowFileName)
        break;
      case 1:
        Utility.doSortListDescending(target, this.isShowFileName)
        break;
      case 2:
        target.sort((a, b) => {
          return a.cTime.localeCompare(b.cTime);
        });
        break;
      case 3:
        target.sort((a, b) => {
          return b.cTime.localeCompare(a.cTime);
        });
        break;
      case 4:
        target.sort((a, b) => {
          return a.videoSize - b.videoSize;
        });
        break;
      case 5:
        target.sort((a, b) => {
          return b.videoSize - a.videoSize;
        });
        break;
    }
    return target;
  }

  private sortFoldersForType(target: Array<FileInfo>, index: number): Array<FileInfo> {
    switch (index) {
      case 0:
        target.sort((a, b) => {
          return a.fileName.localeCompare(b.fileName);
        });
        break;
      case 1:
        target.sort((a, b) => {
          return b.fileName.localeCompare(a.fileName);
        });
        break;
      case 2:
        target.sort((a, b) => {
          return a.time - b.time;
        });
        break;
      case 3:
        target.sort((a, b) => {
          return b.time - a.time;
        });
        break;
    }
    return target;
  }

  doSortType(index: number, shouldScrollToTop: boolean = true) {
    this.sortType = index;
    if (this.isSearchMode && this.searchText.length > 0) {
      if (this.filteredList.length > 0) {
        this.filteredList = this.sortSongsForType([...this.filteredList], index)
      }
      if (this.filteredFolderList.length > 0) {
        this.filteredFolderList = this.sortFoldersForType([...this.filteredFolderList], index)
      }
      this.refreshDisplaySongs(this.filteredList, shouldScrollToTop)
      return
    }
    this.songs = this.sortSongsForType([...this.songs], index)
    this.visibleFoldersState = this.sortFoldersForType([...this.visibleFoldersState], index)
    this.updateListData(this.songs,true, shouldScrollToTop)
  }

  private getSortItemBackground(sortType: number): ResourceColor {
    if (this.sortType !== sortType) {
      return Color.Transparent;
    }
    const isAsc: boolean = sortType % 2 === 0;
    if (isAsc) {
      return this.isDarkMode ? '#295B8A' : '#DCEEFF';
    }
    return this.isDarkMode ? '#7A4D22' : '#FFE9D5';
  }


  @Builder
  topTitleBar(){
    Column() {
      Row({ space: 15 }) {
        if (!this.isSearchMode &&!(this.webdavManager.canGoBack())) {
          //左侧滑动按钮
          TitleBarPointLightButton({
            iconResource: $r('sys.symbol.sort'),
            iconSize: 25,
            pointColor: this.themeColor,
            clickScale: 0.6,
            clickHandler: () => {
              this.getUIContext().animateTo({ duration: 555 }, () => {
                this.isShowDrawer = !this.isShowDrawer
                this.offsetX = 0
              })
            }
          })

        }else{

          //左侧搜索返回按钮
          TitleBarPointLightButton({
            iconResource: $r('sys.symbol.chevron_left'),
            iconSize: 24,
            pointColor: this.themeColor,
            clickScale: 0.6,
            clickHandler: () => {
              if(this.isSearchMode){
                this.isSearchMode = false
                this.searchController.stopEditing()
                this.onSearchInput('')
              }else{
                if(this.webdavManager.canGoBack()){
                  this.goBack()
                }
              }
            }
          })

        }

        if(!this.isSearchMode){
          Text(this.selectedAccount.name)
            .margin({left:3,right:10})
            .fontColor($r('app.color.text_color'))
            .fontSize(19)
            .maxLines(1)
            .textOverflow({ overflow: TextOverflow.MARQUEE })//超长滚动
            .layoutWeight(1)
            .clickEffect({ level: ClickEffectLevel.MIDDLE,scale:0.6 })
        }

        //搜索框
        Search({ controller: this.searchController,value: this.searchText, placeholder: '输入名称...' })
          .searchButton('搜索',{fontColor:this.themeColor})
          .searchIcon({
            src: $r('sys.media.ohos_ic_public_search_filled')
          })
          .cancelButton({
            style: CancelButtonStyle.CONSTANT,
            icon: {
              src: $r('sys.media.ohos_ic_public_cancel_filled')
            }
          })
          .layoutWeight(1)
          .height(35)
          .maxLength(20)
          .backgroundColor(this.isDarkMode?Color.Black:'#F5F5F5')
          .placeholderColor(Color.Grey)
          .placeholderFont({ size: 14, weight: 400 })
          .textFont({ size: 14, weight: 400 })
          .onSubmit((value: string) => {
            console.log('onecold onSubmit ='+value)
            this.searchController.stopEditing()
            this.commitSearchHistory(value)
            this.onSearchInput(value);

          })
          .onChange((value: string) => {
            console.log('onecold onChange ='+value)
            this.onSearchInput(value);
          })
          .visibility(this.isSearchMode?Visibility.Visible:Visibility.None)
          .animation({ duration: 300, curve: Curve.Ease })


        //搜索按钮
        if (!this.isSearchMode) {
          TitleBarPointLightButton({
            iconResource: $r('sys.symbol.magnifyingglass'),
            iconSize: 25,
            pointColor: this.themeColor,
            clickScale: 0.6,
            clickHandler: () => {
              this.isSearchMode = true
              this.loadSearchHistory()
              this.restoreCurrentDirectorySearchView()
              void this.webdavManager.ensureGlobalSearchIndex(this.selectedAccount)
            }
          })
          //排序按钮
          TitleBarPointLightButton({
            iconResource: $r('sys.symbol.list_number'),
            iconSize: 25,
            pointColor: this.themeColor,
            clickScale: 0.6,
            menuBuilder: () => {
              this.SortMenuBuilder()
            }
          })
          //添加/上传综合按钮
          TitleBarPointLightButton({
            iconResource: $r('sys.symbol.plus'),
            iconSize: 25,
            pointColor: this.themeColor,
            clickScale: 0.6,
            menuBuilder: () => {
              this.MoreMenuBuilder()
            }
          })
          .bindContentCover($$this.isShowUploadFile, this.UploadFielBuilder(), {
            transition: TransitionEffect.translate({ x: 500 }).animation({ curve: curves.springMotion(0.6, 0.8) })
          })


        }


      }
    }
    .padding({ top: this.topSafeHeight + 10, left: 10, right: 10, bottom: 2 })
    .width('100%')
  }


  @Builder
  UploadFielBuilder() {
    Scroll() {
      Column() {
        UploadMusicPage({
          accountId: this.selectedAccount.id,
          isShowUploadFile:this.isShowUploadFile,
          onResult:(result:boolean)=>{
            console.info("heanup onResult,上传成功，刷新列表")
            if(result){
              // 上传文件成功后刷新当前路径的列表
              if(this.selectedAccount.webType==RemoteDriveType.Baidu){
                ToastUtil.showToast(`由于百度网盘限制，百度网盘的上传路径是apps/${this.appName}`)
              }
              this.refreshFileListAfterUpload()
            }
          },
        })
      }
    }
    .width('100%')
    .height('100%')
  }

  @Builder
  DownloadCenterBuilder() {
    DownloadCenter({
      themeColor: this.themeColor,
      isDarkMode: this.isDarkMode,
      appName: this.appName,
      topSafeHeight: this.topSafeHeight,
      bottomSafeHeight: this.bottomSafeHeight,
      tasksVersion: this.downloadCenterRefreshVersion,
      activeTasksProp: this.downloadCenterActiveTasks,
      completedTasksProp: this.downloadCenterCompletedTasks,
      selectedIndexes: $downloadCenterTabIndex,
      onPauseTask: (taskId: string) => {
        this.pauseDownloadTask(taskId);
      },
      onResumeTask: (taskId: string) => {
        this.resumeDownloadTask(taskId);
      },
      onDeleteTask: (taskId: string) => {
        this.deleteDownloadTask(taskId);
      },
      onPlayCompletedTask: (taskId: string) => {
        this.playCompletedDownloadTask(taskId);
      },
      onClose: () => {
        this.isShowDownloadCenter = false;
      }
    })
      .width('100%')
      .height('100%')
  }

  //搜索功能的实现
  @State searchText: string = ''; // 用户输入内容
  @State filteredList: Array<VideoItem> = []; // 过滤后的歌曲结果
  @State filteredFolderList: Array<FileInfo> = []; // 过滤后的文件夹结果
  @State searchHistoryItems: string[] = [];
  private readonly searchHistoryScope: string = 'webdav_music';

  private loadSearchHistory(): void {
    this.searchHistoryItems = SearchHistoryUtil.load(this.searchHistoryScope);
  }

  private saveSearchHistory(keyword: string): void {
    this.searchHistoryItems = SearchHistoryUtil.save(this.searchHistoryScope, keyword);
  }

  private commitSearchHistory(keyword: string): void {
    const normalized = keyword.trim();
    if (normalized.length === 0) {
      return;
    }
    this.saveSearchHistory(normalized);
  }

  private applySearchHistory(keyword: string): void {
    this.searchText = keyword;
    this.searchController.stopEditing();
    this.onSearchInput(keyword);
  }

  private restoreCurrentDirectorySearchView(shouldScrollToTop: boolean = true): void {
    this.filteredList = []
    this.filteredFolderList = []
    this.songs = this.sortSongsForType([...this.songs], this.sortType)
    this.visibleFoldersState = this.sortFoldersForType([...this.visibleFoldersState], this.sortType)
    this.isSearchLoading = false
    this.refreshDisplaySongs(this.songs, shouldScrollToTop)
    this.syncSelectionAfterRefresh()
  }

  private shouldShowSearchLocation(): boolean {
    return this.isSearchMode && this.searchText.length > 0
  }

  private getSongSearchLocation(song: VideoItem): string {
    if (!this.shouldShowSearchLocation() || !this.selectedAccount) {
      return ''
    }
    return this.webdavManager.getSongSearchLocationLabel(this.selectedAccount, song)
  }

  private getFolderSearchLocation(folder: FileInfo): string {
    if (!this.shouldShowSearchLocation() || !this.selectedAccount) {
      return ''
    }
    return this.webdavManager.getFolderSearchLocationLabel(this.selectedAccount, folder)
  }

  private async applyGlobalSearch(keyword: string, ticket: number): Promise<void> {
    if (!this.selectedAccount) {
      if (ticket === this.searchTicket) {
        this.isSearchLoading = false
        this.filteredList = []
        this.filteredFolderList = []
        this.refreshDisplaySongs([])
      }
      return
    }
    try {
      const result: RemoteDriveGlobalSearchResult = await this.webdavManager.searchGlobalIndex(this.selectedAccount, keyword);
      if (ticket !== this.searchTicket) {
        return
      }
      this.filteredList = this.sortSongsForType([...result.songs], this.sortType)
      this.filteredFolderList = this.sortFoldersForType([...result.folders], this.sortType)
      this.isSearchLoading = result.isIndexing
      this.refreshDisplaySongs(this.filteredList)
      this.syncSelectionAfterRefresh()
    } catch (error) {
      if (ticket !== this.searchTicket) {
        return
      }
      this.isSearchLoading = false
      this.filteredList = []
      this.filteredFolderList = []
      this.refreshDisplaySongs([])
      this.syncSelectionAfterRefresh()
      ToastUtil.showToast(`搜索失败: ${(error as Error).message}`)
    }
  }

  private onSearchInput(value: string) {
    const keyword = value.trim();
    this.searchText = keyword;
    const ticket = ++this.searchTicket;
    if (keyword.length === 0) {
      this.loadSearchHistory();
      this.restoreCurrentDirectorySearchView();
      return;
    }
    if (!this.isSearchMode) {
      this.isSearchMode = true;
    }
    this.isSearchLoading = true;
    void this.applyGlobalSearch(keyword, ticket);
  }

  @Builder
  private SearchHistoryView(): void {
    Column({ space: 10 }) {
      Row() {
        Text('搜索历史')
          .fontSize(14)
          .fontWeight(FontWeight.Medium)
          .fontColor($r('app.color.text_color'))
        Blank()
        Button('清空')
          .fontSize(12)
          .fontColor(this.themeColor)
          .backgroundColor(Color.Transparent)
          .padding({ left: 8, right: 8, top: 4, bottom: 4 })
          .onClick(() => {
            SearchHistoryUtil.clear(this.searchHistoryScope);
            this.searchHistoryItems = [];
          })
      }
      .width('100%')

      Flex({ wrap: FlexWrap.Wrap }) {
        ForEach(this.searchHistoryItems, (keyword: string) => {
          Button(keyword)
            .fontSize(12)
            .fontColor($r('app.color.text_color'))
            .backgroundColor(this.isDarkMode ? '#222222' : '#F2F3F5')
            .borderRadius(16)
            .margin({ right: 8, bottom: 8 })
            .padding({ left: 12, right: 12, top: 8, bottom: 8 })
            .onClick(() => {
              this.applySearchHistory(keyword);
            })
        })
      }
      .width('100%')
    }
    .width('100%')
    .padding({ left: 20, right: 20, top: this.getSearchLoadingTopOffset(), bottom: 10 })
  }

  private openSongPropertySheet(song: VideoItem): void {
    this.songForPropertySheet = song;
    this.isShowSongPropertySheet = true;
  }

  private getSongPropertyValue(value: string | number | undefined): string {
    if (value === undefined) {
      return '--';
    }
    if (typeof value === 'number') {
      return `${value}`;
    }
    if (StrUtil.isEmpty(value)) {
      return '--';
    }
    return value;
  }

  private getSongTypeLabel(song: VideoItem | undefined): string {
    if (!song) {
      return '--';
    }
    if (song.type === CommonConstants.TYPE_LOCAL) {
      return '本地';
    }
    if (song.type === CommonConstants.TYPE_WEBDAV) {
      return 'WebDAV';
    }
    if (song.type === CommonConstants.TYPE_JELLYFIN) {
      return 'Jellyfin';
    }
    if (song.type === CommonConstants.TYPE_EMBY) {
      return 'Emby';
    }
    if (song.type === CommonConstants.TYPE_AUDIOSTATION) {
      return 'AudioStation';
    }
    if (song.type === CommonConstants.TYPE_BAIDU) {
      return '百度网盘';
    }
    if (song.type === CommonConstants.TYPE_NAVIDROME) {
      return 'Navidrome';
    }
    if (song.type === CommonConstants.TYPE_PLEX) {
      return 'Plex';
    }
    return `${song.type}`;
  }

  @Builder
  private SongPropertyRow(label: string, value: string) {
    Column({ space: 4 }) {
      Text(label)
        .fontSize(12)
        .fontColor($r('app.color.index_tab_font_color'))
        .opacity(0.7)
      Text(value)
        .fontSize(14)
        .fontColor($r('app.color.text_color'))
        .maxLines(6)
        .textOverflow({ overflow: TextOverflow.Ellipsis })
    }
    .width('100%')
    .alignItems(HorizontalAlign.Start)
    .padding({ left: 2, right: 2, top: 4, bottom: 4 })
  }

  @Builder
  private SongPropertyCoverRow(label: string, coverPath: string | undefined) {
    Column({ space: 8 }) {
      Text(label)
        .fontSize(12)
        .fontColor($r('app.color.index_tab_font_color'))
        .opacity(0.7)
      if (StrUtil.isNotEmpty(coverPath)) {
        Image(coverPath as string)
          .width(136)
          .height(136)
          .borderRadius(10)
          .sourceSize({ width: 136, height: 136 })
          .objectFit(ImageFit.Cover)
          .alt($r('app.media.alt'))
          .fillColor(this.themeColor)
      } else {
        Text('--')
          .fontSize(14)
          .fontColor($r('app.color.text_color'))
      }
    }
    .width('100%')
    .alignItems(HorizontalAlign.Start)
    .padding({ left: 2, right: 2, top: 4, bottom: 4 })
  }

  @Builder
  private SongPropertyLyricRow(label: string, lyricContent: string | undefined) {
    Column({ space: 4 }) {
      Text(label)
        .fontSize(12)
        .fontColor($r('app.color.index_tab_font_color'))
        .opacity(0.7)
      Text(this.getSongPropertyValue(lyricContent))
        .fontSize(14)
        .fontColor($r('app.color.text_color'))
        .textAlign(TextAlign.Start)
    }
    .width('100%')
    .alignItems(HorizontalAlign.Start)
    .padding({ left: 2, right: 2, top: 4, bottom: 4 })
  }

  @Builder
  private SongPropertySheetBuilder() {
    if (this.songForPropertySheet) {
      Scroll() {
        Column({ space: 10 }) {
          this.SongPropertyCoverRow('音乐封面', this.songForPropertySheet?.pixelMapPath)
          this.SongPropertyRow('歌曲名称', this.getSongPropertyValue(this.songForPropertySheet?.name))
          this.SongPropertyRow('文件名称', this.getSongPropertyValue(this.songForPropertySheet?.fileName))
          this.SongPropertyRow('艺术家', this.getSongPropertyValue(this.songForPropertySheet?.artist))
          this.SongPropertyRow('专辑', this.getSongPropertyValue(this.songForPropertySheet?.album))
          this.SongPropertyRow('时长', this.getSongPropertyValue(this.songForPropertySheet?.duration))
          this.SongPropertyRow('文件大小', this.getSongPropertyValue(this.songForPropertySheet?.size))
          this.SongPropertyRow('比特率', this.getSongPropertyValue(this.songForPropertySheet?.bit_rate))
          this.SongPropertyRow('采样率', this.getSongPropertyValue(this.songForPropertySheet?.sampleRate))
          this.SongPropertyLyricRow('内嵌歌词', this.songForPropertySheet?.lyricContent)
          this.SongPropertyRow('创建时间', this.getSongPropertyValue(this.songForPropertySheet?.cTime))
          this.SongPropertyRow('来源类型', this.getSongTypeLabel(this.songForPropertySheet))
          this.SongPropertyRow('文件路径', this.getSongPropertyValue(this.songForPropertySheet?.filePath))
        }
        .width('100%')
        .padding({ left: 12, right: 12, top: 8, bottom: 12 })
      }
      .width('100%')
      .height('100%')
      .scrollBar(BarState.Auto)
    } else {
      Column() {
        Text('暂无歌曲属性信息')
          .fontSize(14)
          .fontColor($r('app.color.text_color'))
          .opacity(0.65)
      }
      .width('100%')
      .height('100%')
      .justifyContent(FlexAlign.Center)
      .alignItems(HorizontalAlign.Center)
    }
  }

  build() {
    Stack() {
      if (this.accounts.length === 0) {
        this.buildEmptyView();
      } else {
        this.buildContentView();
      }

      // 顶部区域：标题栏在上，面包屑在下
      Column() {
        this.topTitleBar()
        this.breaker()
      }
      .width('100%')
      .visibility(this.isShowTitleBar?Visibility.Visible:
        this.autoHideTitle?Visibility.None:Visibility.Visible)
      .animation({
        duration: 500,
        curve: Curve.Friction  // 可选动画曲线
      })
      .position({ top: 0, left: 0 })
      // .backgroundColor($r('app.color.start_window_background'))

      // 多选操作条，位于播放条之上（仅在多选模式下显示）
      if (this.isMultiSelect || this.isDeletingSelection) {
        this.buildSelectionOverlay()
      }

    }
    .width('100%')
    .height('100%')
    .alignContent(Alignment.Bottom)
    .backgroundImage(this.isMusicCoverHomeBackgroundActive()
      ? this.customizeMusicBgPath
      : (this.isCustomizeBg ? this.customizeBgPath : $r('app.color.start_window_background')))
    .backgroundImageSize(this.isLandscape?{width:'100%'}:{ height: '100%'})
    .backgroundImagePosition(Alignment.Center)
    .backdropBlur(this.blurValue)
    .backgroundBrightness({rate:this.isMusicCoverHomeBackgroundActive() || this.isCustomizeBg ? 0.1 : 0,
      lightUpDegree:this.bgBrightness})
    .backgroundBlurStyle(this.isMusicCoverHomeBackgroundActive()
      ? BlurStyle.BACKGROUND_ULTRA_THICK :
      BlurStyle.NONE)
    .bindSheet($$this.isShowSongPropertySheet, this.SongPropertySheetBuilder(), {
      height: '99%',
      dragBar: true,
      showClose: true,
      preferType: SheetType.CENTER,
      blurStyle: BlurStyle.Thin,
      title: { title: '歌曲属性' }
    })
    .expandSafeArea([SafeAreaType.SYSTEM], [SafeAreaEdge.BOTTOM])
  }

  private getSearchLoadingTopOffset(): number {
    return this.topSafeHeight + (this.currentDirectoryPath !== '' ? 100 : 56)
  }

  private shouldShowSearchIndexingTip(): boolean {
    return this.isSearchMode && this.searchText.length > 0 && this.isSearchLoading
  }

  private getListContentStartOffset(): number {
    if (this.shouldShowSearchIndexingTip()) {
      return 8
    }
    if(this.isLoading)
      return 8
    return this.topSafeHeight + 85
  }

  // 目录切换时统一在当前可见的账户图标外层显示转圈，避免页面中间闪大 loading。
  @Builder
  private buildDirectoryNavigationIndicator(iconSize: number, containerSize: number) {
    Stack({ alignContent: Alignment.Center }) {
      if (this.isDirectoryNavigationLoading) {
        // 使用环形进度外圈承载目录切换态，避免在标题栏或页面中央再出现第二套 loading。
        Progress({ value: 0, total: 100, type: ProgressType.Ring })
          .width(containerSize + 8)
          .height(containerSize + 8)
          .color(this.themeColor)
          .style({ strokeWidth: 2.5, status: ProgressStatus.LOADING, shadow: false })
          .scale({ x: -1, y: 1 })
      }

      Image(this.selectedAccount.coverPath ?
        this.selectedAccount.coverPath : getCloudDiskIcon(this.selectedAccount.webType))
        .width(iconSize)
        .height(iconSize)
        .alt($r('app.media.cloudDisk'))
    }
    .width(containerSize)
    .height(containerSize)
    .borderRadius(containerSize / 2)
    .backgroundColor('#EFEFEF')
  }

  @Builder
  breaker() {
    // 面包屑导航
    Column({ space: 8 }) {
      if (!this.isSearchMode || this.webdavManager.canGoBack()) {
        Row({ space: 8 }) {
          // 根目录只展示账号图标和加载态，不再承载返回动作；子目录才点击返回上级。
          if (this.webdavManager.canGoBack()) {
            Row() {
              this.buildDirectoryNavigationIndicator(18, 24)
            }
            .width(24)
            .height(24)
            .margin({left:5})
            .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.92 })
            .onClick(() => this.goBack())
            .bindContentCover($$this.isShowDownloadCenter, this.DownloadCenterBuilder(),
              {
                modalTransition:ModalTransition.DEFAULT,
                onWillDisappear: () => {
                  this.isShowDownloadCenter = false
                },
              })
          } else {
            Row() {
              this.buildDirectoryNavigationIndicator(18, 24)
            }
            .width(24)
            .height(24)
            .margin({left:5})
            .bindContentCover($$this.isShowDownloadCenter, this.DownloadCenterBuilder(),
              {
                modalTransition:ModalTransition.DEFAULT,
                onWillDisappear: () => {
                  this.isShowDownloadCenter = false
                },
              })
          }

          Row({ space: 4 }) {
            if (this.breadcrumbs.length === 0) {
              Text('根目录')
                .fontSize(15)
                .fontColor($r('app.color.text_color'))
                .maxLines(1)
                .textOverflow({ overflow: TextOverflow.Ellipsis })
            } else {
              ForEach(this.breadcrumbs, (crumb: BreadcrumbItem, index: number) => {
                Row() {
                  Text(crumb.label)
                    .fontSize(15)
                    .fontColor($r('app.color.text_color'))
                    .maxLines(1)
                    .textOverflow({ overflow: TextOverflow.Ellipsis })
                }
                .onClick(() => {
                  this.navigateToBreadcrumb(crumb);
                })

                // 添加分隔符（除了最后一个元素）
                if (index < this.breadcrumbs.length - 1) {
                  Text('/')
                    .fontSize(15)
                    .fontColor($r('app.color.index_tab_font_color'))
                    .opacity(0.6)
                }
              })
            }
          }
          .layoutWeight(1)

        }
        .width('100%')
        .padding({ left: 4, right: 4 })
      }

    }
    .width('100%')
    .padding({ left: 12, right: 12, top: 8, bottom: 5 })
  }


  // 空状态视图
  @Builder
  buildEmptyView() {
    Column({ space: 20 }) {
      Image($r('app.media.cloudDisk'))
        .width(120)
        .height(120)
        .opacity(0.3)

      Text(`暂无${getRemoteDriveAccountLabel()}`)
        .fontSize(16)
        .fontColor($r('app.color.index_tab_font_color'))
        .opacity(0.6)

    }
    .justifyContent(FlexAlign.Center)
    .width('100%')
    .height('100%')
  }

  // 内容视图
  @Builder
  buildContentView() {
    Column() {

      // 加载状态

      Row() {
        LoadingProgress()
          .width(30)
          .height(30)
          .color(this.themeColor)
        Text('加载中...')
          .fontSize(14)
          .fontColor($r('app.color.index_tab_font_color'))
          .margin({ left: 12 })
      }
      .padding({top: this.topSafeHeight + 90, left: 20, right: 20})
      .visibility(this.isLoading?Visibility.Visible:Visibility.None)
      .opacity(this.isLoading ? 1 : 0)
      .animation({
        duration: 800,
        curve: Curve.Smooth // 可选动画曲线
      })

      if (this.shouldShowSearchIndexingTip()) {
        Row({ space: 8 }) {
          LoadingProgress()
            .width(18)
            .height(18)
            .color(this.themeColor)
          Text('正在构建全局索引，结果会持续补全')
            .fontSize(12)
            .fontColor($r('app.color.index_tab_font_color'))
            .opacity(0.65)
        }
        .alignSelf(ItemAlign.Center)
        .padding({ left: 20, right: 20, top: this.getSearchLoadingTopOffset() })
      }


      // 文件列表（文件夹 + 歌曲）
      if ((this.isSearchMode ? this.filteredFolderList.length : this.visibleFoldersState.length) > 0 ||
        this.dataSource.totalCount() > 0) {
        List({ scroller: this.listScroller ,space: 0 }) {
          // 显示文件夹 - 只显示当前目录下的直接子文件夹
          ForEach(this.isSearchMode ? this.filteredFolderList : this.visibleFoldersState, (folder: FileInfo) => {
            if (this.isMultiSelect) {
              ListItem() {
                this.buildFolderItem(folder)
              }
              .clickEffect({ level: ClickEffectLevel.MIDDLE })
            } else {
              ListItem() {
                this.buildFolderItem(folder)
              }
              .clickEffect({ level: ClickEffectLevel.MIDDLE })
              .swipeAction({
                end: this.buildSwipeDeleteAction(() => {
                  this.confirmDeleteSingleFolder(folder)
                }),
                edgeEffect: SwipeEdgeEffect.None
              })
            }
          }, (folder: FileInfo) =>  folder.name+folder.fileName)

          // 显示歌曲
          LazyForEach(this.dataSource, (song: VideoItem, index: number) => {
            if (this.isMultiSelect) {
              ListItem() {
                this.buildSongItem(song, index)
              }
              .clickEffect({ level: ClickEffectLevel.MIDDLE })
            } else {
              ListItem() {
                this.buildSongItem(song, index)
              }
              .clickEffect({ level: ClickEffectLevel.MIDDLE })
              .swipeAction({
                end: this.buildSwipeDeleteAction(() => {
                  this.confirmDeleteSingleSong(song)
                }),
                edgeEffect: SwipeEdgeEffect.None
              })
            }
          }, (item: VideoItem, index: number) => {
            return buildWebDavSongItemRenderKey(item.filePath, index, item.pixelMapPath)
          })
        }
        .scrollBar(BarState.Off)
        .onScrollIndex((start: number, end: number) => {
          this.updateVisibleRemoteThumbRange(start, end)
        })
        .onScrollFrameBegin((offset: number) => {
          // 获取当前滚动偏移量
          if(this.autoHideTitle){
            const currentOffsetY = this.listScroller.currentOffset().yOffset;
            // 判断滚动方向
            if (currentOffsetY > this.prevOffsetY) {
              this.isShowTitleBar = false
            } else if (currentOffsetY < this.prevOffsetY) {
              this.isShowTitleBar = true
            }
            // 更新前一次偏移量
            this.prevOffsetY = currentOffsetY;
          }

          return { offsetRemain: offset };
        })
        .contentStartOffset(this.getListContentStartOffset())
        .contentEndOffset(this.bottomSafeHeight+70)
        .layoutWeight(1)
        .margin({ top: 4 })
      } else if (this.isSearchMode && this.searchText.length === 0 && this.searchHistoryItems.length > 0) {
        this.SearchHistoryView()
      } else if (!this.isLoading) {
        Column() {
          Text(this.isSearchMode && this.searchText.length > 0 ? '没有找到匹配结果' : '暂无内容')
            .fontSize(14)
            .fontColor($r('app.color.index_tab_font_color'))
            .opacity(0.6)
          Text(this.isSearchMode && this.searchText.length > 0 ?
            (this.isSearchLoading ? '正在继续扫描更多目录...' : '可以换个关键词再试') :
            '点击"左侧菜单"网盘加载')
            .fontSize(12)
            .fontColor($r('app.color.index_tab_font_color'))
            .opacity(0.4)
            .margin({ top: 8 })
        }
        .justifyContent(FlexAlign.Center)
        .layoutWeight(1)
      }
    }
    .layoutWeight(1)

  }

  @Builder
  private buildMultiSelectBar() {
    Row({ space: 12 }) {
      Button(this.isAllSelected ? '反选' : '全选', { type: ButtonType.Circle, stateEffect: true })
        .width(55)
        .height(55)
        .fontSize(13)
        .backgroundColor(this.themeColor)
        .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.5 })
        .onClick(() => this.toggleSelectAll())

      Button('删除', { type: ButtonType.Circle, stateEffect: true })
        .width(55)
        .height(55)
        .fontSize(13)
        .backgroundColor(this.themeColor)
        .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.5 })
        .enabled(this.getSelectedEntryCount() > 0 && !this.isDeletingSelection)
        .onClick(() => this.confirmDeleteSelected())

      Button('+歌单', { type: ButtonType.Circle, stateEffect: true })
        .width(55)
        .height(55)
        .fontSize(13)
        .backgroundColor(this.themeColor)
        .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.5 })
        .enabled(this.canOperateOnSelectedSongs())
        .onClick(() => {
          void this.openSelectedSongsAddToPlaylistDialog();
        })

      Button('下载', { type: ButtonType.Circle, stateEffect: true })
        .width(55)
        .height(55)
        .fontSize(13)
        .backgroundColor(this.themeColor)
        .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.5 })
        .enabled(this.canOperateOnSelectedSongs())
        .onClick(() => {
          void this.enqueueSelectedSongsDownload();
        })

      Button('取消', { type: ButtonType.Circle, stateEffect: true })
        .width(55)
        .height(55)
        .fontSize(13)
        .backgroundColor(this.themeColor)
        .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.5 })
        .onClick(() => this.exitMultiSelect())
    }
    .width('100%')
    .padding({ bottom: 10, top: 12 })
    .justifyContent(FlexAlign.Center)
    .visibility(this.isMultiSelect ? Visibility.Visible : Visibility.None)
    .opacity(this.isMultiSelect ? 1 : 0)
    .animation({ duration: 300, curve: 'ease-in-out' })
  }

  @Builder
  private buildSelectionOverlay() {
    Column() {
      Row({ space: 10 }) {
        LoadingProgress()
          .width(22)
          .height(22)
          .color(this.themeColor)
        Text('正在删除...')
          .fontSize(14)
          .fontColor($r('app.color.index_tab_font_color'))
      }
      .padding({ top: 12, bottom: 6 })
      .justifyContent(FlexAlign.Center)
      .visibility(this.isDeletingSelection ? Visibility.Visible : Visibility.None)

      this.buildMultiSelectBar()
    }
    .width('100%')
    .padding({ left: 12, right: 12, bottom: this.bottomSafeHeight  })
  }

  private getPointLightItemKey(prefix: string, value: string): string {
    return `${prefix}_${value}`
  }

  private handlePointLightTouch(itemKey: string, event: TouchEvent): void {
    if (deviceInfo.sdkApiVersion < 20) {
      return
    }
    if (event.type === TouchType.Down) {
      this.activePointLightItemKey = itemKey
      this.pointLightOptions = {
        color: this.themeColor,
        intensity: 1,
        height: 60
      }
      return
    }
    if ((event.type === TouchType.Up || event.type === TouchType.Cancel) && this.activePointLightItemKey === itemKey) {
      this.activePointLightItemKey = ''
      this.pointLightOptions = undefined
    }
  }

  private getPointLightOptions(itemKey: string): hdsEffect.PointLightOptions | undefined {
    if (this.activePointLightItemKey !== itemKey) {
      return undefined
    }
    return this.pointLightOptions
  }

  // 文件夹列表项
  @Builder
  buildFolderItem(folder: FileInfo) {
    Button({ type: ButtonType.Capsule, stateEffect: true }) {
      Row({ space: 2 }) {
        SymbolGlyph($r('sys.symbol.folder'))
          .fontSize(48)
          .fontColor([this.themeColor])
          .alignSelf(ItemAlign.Center)
          .margin({ left: 8, right: 6 })

        // 文件夹信息
        Column({ space: 4 }) {
          Text(decodeUrlEncodedString(folder.fileName.replace(/\/+$/, '')))
            .fontSize(15)
            .fontColor($r('app.color.index_tab_font_color'))
            .maxLines(1)
            .textOverflow({ overflow: TextOverflow.Ellipsis })

          Text(this.getFolderSearchLocation(folder))
            .fontSize(12)
            .fontColor($r('app.color.index_tab_font_color'))
            .opacity(0.48)
            .maxLines(1)
            .textOverflow({ overflow: TextOverflow.Ellipsis })
            .visibility(this.getFolderSearchLocation(folder).length > 0 ? Visibility.Visible : Visibility.None)

          Text('文件夹')
            .fontSize(13)
            .fontColor($r('app.color.index_tab_font_color'))
            .opacity(0.6)
        }
        .alignItems(HorizontalAlign.Start)
        .layoutWeight(1)

        Checkbox({ name: `folder_checkbox_${this.resolveFolderSelectionKey(folder)}` })
          .select(this.isFolderSelected(folder))
          .selectedColor(this.themeColor)
          .opacity(this.isMultiSelect ? 1 : 0)
          .animation({
            duration: 300,
            curve: 'Smooth'
          })
          .visibility(this.isMultiSelect ? Visibility.Visible : Visibility.None)
          .onChange((checked: boolean) => this.handleFolderCheckboxSelection(folder, checked))
          .margin({ left: 10, top: 8, bottom: 8, right: 12 })
          .width(22)
          .height(22)
      }
    }
    .reuseId('dir_item')
    .width('100%')
    .padding(12)
    .backgroundColor(Color.Transparent)
    .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.8 })
    .onClick(() => {
      if (this.ignoreTapAfterExitMultiSelect) {
        return;
      }
      if (this.isMultiSelect) {
        this.toggleFolderSelection(folder);
        return;
      }
      if (this.isSearchMode && this.searchText.length > 0) {
        this.isSearchMode = false
        this.searchController.stopEditing()
        this.onSearchInput('')
      }
      this.enterFolder(folder);
      this.breadcrumbs = this.webdavManager.getBreadcrumbs();
    })
    .bindContextMenu(this.FolderLongPressMenuBuilder(folder), ResponseType.LongPress,
      {
        preview: MenuPreviewMode.IMAGE
    })
    .bindContextMenu(this.FolderLongPressMenuBuilder(folder), ResponseType.RightClick,
      {
        preview: MenuPreviewMode.IMAGE
      })
    .onTouch((event: TouchEvent) => {
      this.handlePointLightTouch(this.getPointLightItemKey('webdav_folder', folder.href), event)
    })
    .visualEffect(deviceInfo.sdkApiVersion >= 20
      ? new hdsEffect.HdsEffectBuilder()
        .pointLight({
          options: this.getPointLightOptions(this.getPointLightItemKey('webdav_folder', folder.href)),
          illuminatedType: hdsEffect.PointLightIlluminatedType.BORDER_CONTENT
        })
        .buildEffect()
      : undefined)
  }

  // 歌曲列表项
  @Builder
  buildSongItem(song: VideoItem, index: number) {
    Button({ type: ButtonType.Capsule, stateEffect: true }) {
      Row({ space: 12 }) {
        // 序号
        // 歌曲封面
        Image(song.pixelMapPath ? song.pixelMapPath : $r('app.media.alt'))
          .width(52)
          .height(52)
          .borderRadius(9)
          .sourceSize({width:38, height:38})
          .alt($r('app.media.alt'))
          .fillColor(this.themeColor)
          .objectFit(ImageFit.Cover)
          .shadow({
            radius: StrUtil.isEmpty(song.pixelMapPath) ?6:14,
            type: ShadowType.BLUR,
            color: 'on_primary'
          })
          .margin({ left: 8 })
          .onClick(() => {
            if (this.isMultiSelect) {
              this.toggleSongSelection(song);
            } else {
              this.playSong(song, index, true);
            }
          })

        // 歌曲信息
        Column({ space: 4 }) {
          Text(this.isShowFileName?song.fileName :song.name)
            .fontSize(15)
            .textOverflow({ overflow: this.isLongNameRoLL?TextOverflow.MARQUEE:TextOverflow.Ellipsis })//超长滚动
            .fontColor(this.currentSong?.filePath==song.filePath?this.themeColor:$r('app.color.index_tab_font_color'))
            .maxLines(1)
            .textOverflow({ overflow: TextOverflow.Ellipsis })

          Row(){
            if (StrUtil.isNotEmpty(song.md5Str)) {
              Text(this.buildSongQualityLabel(song))
                .fontSize(10)
                .fontColor($r('app.color.index_tab_font_color'))
                .fontWeight(500)
                .padding({ top: 2, right: 5, left: 5, bottom: 2 })
                .borderRadius(6)
                .margin({right:3})
                .backgroundColor('#FFC107')
                .opacity(0.92)
            }
            Text((song.artist ?? '') + "  ")
              .fontSize(13)
              .fontColor(this.currentSong?.filePath==song.filePath?this.themeColor:$r('app.color.index_tab_font_color'))
              .opacity(0.6)
              .maxLines(1)
              .visibility(song.artist?Visibility.Visible:Visibility.None)
              .textOverflow({ overflow: TextOverflow.Ellipsis })
            Text(this.buildSongMetaLine(song))
              .fontSize(13)
              .fontColor(this.currentSong?.filePath==song.filePath?this.themeColor:
                $r('app.color.index_tab_font_color'))
              .opacity(0.6)
              .maxLines(1)
              .textOverflow({ overflow: TextOverflow.Ellipsis })
          }
          .width('90%')

          Text(this.getSongSearchLocation(song))
            .fontSize(12)
            .fontColor(this.currentSong?.filePath==song.filePath?this.themeColor:$r('app.color.index_tab_font_color'))
            .opacity(0.42)
            .maxLines(1)
            .textOverflow({ overflow: TextOverflow.Ellipsis })
            .visibility(this.getSongSearchLocation(song).length > 0 ? Visibility.Visible : Visibility.None)
        }
        .alignItems(HorizontalAlign.Start)
        .layoutWeight(1)
        .padding({ right: 20 })

        Column() {
          Checkbox({ name: 'checkbox_' + index })
            .select(this.isSongSelected(song))
            .selectedColor(this.themeColor)
            .opacity(this.isMultiSelect ? 1 : 0)
            .animation({
              duration: 300,
              curve: 'Smooth'
            })
            .visibility(this.isMultiSelect ? Visibility.Visible : Visibility.None)
            .onChange((checked: boolean) => this.handleCheckboxSelection(song, checked))
            .margin({ left: 10, top: 8, bottom: 8, right: 12 })
            .width(22)
            .height(22)

          PlayingIndicator({
            isActive: this.currentSong?.filePath == song.filePath && !this.isMultiSelect,
            indicatorSize: 18,
            marginRight: 12,
            marginTop: 8,
            marginBottom: 8
          })
        }
      }
    }
    .width('100%')
    .padding(12)
    .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.8 })
    .backgroundColor(Color.Transparent)
    .onClick(() => {
      if (this.ignoreTapAfterExitMultiSelect) {
        return;
      }
      if (this.isMultiSelect) {
        this.toggleSongSelection(song);
      } else {
        this.playSong(song, index);
      }
    })
    // .gesture(LongPressGesture().onAction(() => {
    //   this.enterMultiSelect(song);
    // }))
    .bindContextMenu(this.LongPressMenuBuilder(song), ResponseType.LongPress,
      {
        preview: MenuPreviewMode.IMAGE
      })
    .bindContextMenu(this.LongPressMenuBuilder(song), ResponseType.RightClick,
      {
        preview: MenuPreviewMode.IMAGE
      })
    .onTouch((event: TouchEvent) => {
      this.handlePointLightTouch(this.getPointLightItemKey('webdav_song', song.filePath), event)
    })
    .visualEffect(deviceInfo.sdkApiVersion >= 20
      ? new hdsEffect.HdsEffectBuilder()
        .pointLight({
          options: this.getPointLightOptions(this.getPointLightItemKey('webdav_song', song.filePath)),
          illuminatedType: hdsEffect.PointLightIlluminatedType.BORDER_CONTENT
        })
        .buildEffect()
      : undefined)
  }


  @Builder
  LongPressMenuBuilder(song: VideoItem) {

    Scroll() {
      Flex({ direction: FlexDirection.Column, justifyContent: FlexAlign.Center, alignItems: ItemAlign.Center }) {
        Menu() {

          MenuItem({
            symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.forward_end_fill')),
            content: '下一首播放'
          })
            .onClick(() => {
              this.addSongToNextPlay(song);
            })

          MenuItem({
            symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.music_note_list')),
            content: '添加到歌单'
          })
            .onClick(async () => {
              await this.openSongAddToPlaylistDialog(song);
            })
          //多选
          MenuItem({
            symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.checkmark_square_on_square')),
            content: $r('app.string.select_all')
          })
            .onClick(() => {
              this.enterMultiSelect(song);
            })
          //下载
          MenuItem({
            symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.download')),
            content:  '下载'
          })
            .onClick(async () => {
              await this.enqueueSongDownload(song);
            })
          MenuItem({
            symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.rename')),
            content: '重命名'
          })
            .visibility(this.canRenameRemoteSong(song) ? Visibility.Visible : Visibility.None)
            .onClick(() => {
              this.showRenameSongDialog(song);
            })
          //属性
          MenuItem({
            symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.music_note_list')),
            content: '属性'
          })
            .onClick(() => {
              this.openSongPropertySheet(song);
            })
          //删除
          MenuItem({
            symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.trash')),
            content: $r('app.string.delete')
          })
            .onClick(() => {
              this.confirmDeleteSingleSong(song);
            })


        }
        .font({ size: 14, weight: FontWeight.Normal })
      }
      .width(180)
    }
    .height('auto')
    .enableScrollInteraction(true)
    .scrollBar(BarState.Off)

  }

  @Builder
  FolderLongPressMenuBuilder(folder: FileInfo) {
    Scroll() {
      Flex({ direction: FlexDirection.Column, justifyContent: FlexAlign.Center, alignItems: ItemAlign.Center }) {
        Menu() {
          MenuItem({
            symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.checkmark_square_on_square')),
            content: $r('app.string.select_all')
          })
            .onClick(() => {
              this.enterFolderMultiSelect(folder);
            })

          MenuItem({
            symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.rename')),
            content: '重命名'
          })
            .visibility(this.canRenameRemoteFolder() ? Visibility.Visible : Visibility.None)
            .onClick(() => {
              this.showRenameFolderDialog(folder);
            })

          MenuItem({
            symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.trash')),
            content: $r('app.string.delete')
          })
            .onClick(() => {
              this.confirmDeleteSingleFolder(folder);
            })
        }
        .font({ size: 14, weight: FontWeight.Normal })
      }
      .width(180)
    }
    .height('auto')
    .enableScrollInteraction(true)
    .scrollBar(BarState.Off)
  }

  
  
  // 对话框控制器
  private createFolderDialogController: CustomDialogController | null = null;
  private renameSongDialogController: CustomDialogController | null = null;

  /**
   * 显示创建文件夹对话框
   */
  private showCreateFolderDialog(): void {
    if (!this.selectedAccount) {
      this.getUIContext().getPromptAction().showToast({ message: `请先选择${getRemoteDriveAccountLabel()}` });
      return;
    }

    // 获取当前主题色
    const currentThemeColor = this.themeColor;

    // 创建自定义对话框
    this.createFolderDialogController = new CustomDialogController({
      builder: CreateFolderDialog({
        onConfirm: (folderName: string) => {
          if (folderName.trim().length > 0) {
            void this.createFolder(folderName.trim());
          } else {
            this.getUIContext().getPromptAction().showToast({ message: '文件夹名称不能为空' });
          }
        },
        onCancel: () => {
          // 用户取消创建
        },
        initialName: '',
        themeColor: currentThemeColor
      }),
      autoCancel: true,
      alignment: DialogAlignment.Center,
      customStyle: false
    });

    this.createFolderDialogController.open();
  }

  /**
   * 上传成功后刷新文件列表
   */
  private async refreshFileListAfterUpload(): Promise<void> {
    if (!this.selectedAccount) {
      Logger.warn(TAG, '刷新失败：未选择账户');
      return;
    }

    try {
      Logger.info(TAG, 'heanup 开始刷新上传后的文件列表');

      // 显示加载状态
      this.isLoading = true;

      // 重新加载当前账户的文件信息
      await this.webdavManager.loadFilesInfoFromAccount(this.selectedAccount,
        this.currentDirectoryPath || this.selectedAccount.filepath || '/');


      Logger.info(TAG, 'heanup 文件列表刷新完成');

    } catch (error) {
      const err = error as Error;
      Logger.error(TAG, `heanup 刷新文件列表失败: ${err.message}`);

      // 显示错误提示
      this.getUIContext().getPromptAction().showToast({
        message: `刷新失败: ${err.message}`
      });
    } finally {
      this.isLoading = false;
    }
  }

  /**
   * 创建文件夹的实际方法
   * @param folderName 文件夹名称
   */
  private async createFolder(folderName: string): Promise<void> {
    if (!this.selectedAccount) {
      this.getUIContext().getPromptAction().showToast({ message: `请先选择${getRemoteDriveAccountLabel()}` });
      return;
    }

    if (folderName.length === 0) {
      this.getUIContext().getPromptAction().showToast({ message: '文件夹名称不能为空' });
      return;
    }

    try {
      Logger.info(TAG, `heanup 开始创建文件夹: ${folderName}`);

      // 显示加载状态
      this.isLoading = true;
      if(this.selectedAccount.webType==RemoteDriveType.Baidu){
        // 调用RemoteDriveManager的createBaiduFolder方法
        await this.webdavManager.createBaiduFolder(this.selectedAccount, folderName);

      }else if(this.selectedAccount.webType==RemoteDriveType.WebDav){
        // 调用RemoteDriveManager的createWebDavFolder方法
        await this.webdavManager.createWebDavFolder(this.selectedAccount, folderName);

      }else if(this.selectedAccount.webType==RemoteDriveType.Smb){
        // 调用RemoteDriveManager的createSMBFolder方法
        await this.webdavManager.createSMBFolder(this.selectedAccount, folderName);
      }else if(this.selectedAccount.webType==RemoteDriveType.Ftp){
        // 调用RemoteDriveManager的createFTPFolder方法
        this.getUIContext().getPromptAction().showToast({ message: 'FTP目前不支持创建文件夹' });
      }else{
        this.getUIContext().getPromptAction().showToast({ message: '当前账户类型不支持创建文件夹' });
      }

      // 创建成功后刷新当前目录
      await this.webdavManager.loadFilesInfoFromAccount(this.selectedAccount,
        this.currentDirectoryPath || this.selectedAccount.filepath || '/');
      this.getUIContext().getPromptAction().showToast({
        message: `文件夹 "${folderName}" 创建成功`
      });

      Logger.info(TAG, `heanup 文件夹创建成功`);

    } catch (error) {
      const err = error as Error;
      Logger.error(TAG, `heanup 创建文件夹失败: ${err.message}`);

      // 显示具体的错误信息
      this.getUIContext().getPromptAction().showToast({
        message: `创建失败: ${err.message}`
      });
    } finally {
      this.isLoading = false;
    }
  }
}