import { WebdavManager } from '../common/util/WebdavManager';
import { WebDavAccount } from '../viewmodel/WebDavAccount';
import { Song } from '../viewmodel/Song';
import { WebdavManagerStates } from '../common/enums/WebdavManagerStates';
import Logger from '../common/util/Logger';
import { promptAction, router, window } from '@kit.ArkUI';
import { CommonConstants } from '../common/constants/CommonConstants';
import { VideoItem } from '../viewmodel/VideoItem';
import { GlobalContext } from '../common/util/GlobalContext';
import { display } from '@kit.ArkUI';
import { FileInfo } from '../viewmodel/FileInfo';
import { emitter } from '@kit.BasicServicesKit';
import { EventConstants } from '../common/constants/EventConstants';
import { LazyDataSource } from '../common/util/LazyDataSource';

/**
 * 歌单播放事件数据
 */
interface PlaylistEventData {
  playlistId: string;
  playlistName: string;
  songCount: number;
  startIndex: number;
  songFilePaths: string[];
  // 移除webDavAuthInfo，现在直接使用videoItems中的webdav_account_id
}

const TAG = 'heanup WebDavMainPage';

// 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 webdavManager: WebdavManager = WebdavManager.getInstance();
  @State accounts: WebDavAccount[] = [];
  @Prop @Watch('onSwitchAccount') selectedAccount: WebDavAccount;
  @State songs: VideoItem[] = [];
  @State  dataSource:LazyDataSource<VideoItem> = new LazyDataSource(this.songs)
  @Link mType: number;
  @Link offsetX: number;
  @Link isShowDrawer: boolean;
  @State isLoading: boolean = false;
  @State webDavFiles: FileInfo[] = []; // 直接在页面中保存文件列表副本
  @StorageProp('themeColor') themeColor: string = CommonConstants.DEFAULT_THEME_COLOR;
  @StorageProp('isDarkMode') isDarkMode: boolean = false;
  @State topRectHeight: number = 0; // 顶部安全区高度
  @State breadcrumbs:string[] = []//面包屑导航

  @State visibleFoldersState: FileInfo[] = []; // 改为普通状态变量

  async onSwitchAccount(){
    console.log('onecold 切换账户:', this.selectedAccount.name);
    this.songs = [];
    this.visibleFoldersState = [];
    this.updateListData(this.songs)
    
    // 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.isLoading = true;
    await this.webdavManager.loadFilesInfoFromAccount(this.selectedAccount)
      .catch((error: Error) => {
        Logger.error(TAG, '加载文件失败: ' + error.message);
        this.isLoading = false;
      });
    this.breadcrumbs = this.webdavManager.getBreadcrumbs();
  }

  updateListData(mList:Array<VideoItem>){
    this.dataSource.pushArrayData(mList)
  }

  // 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 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 = [];
    }
  }

  // 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);
  };

  aboutToAppear(): void {
    // 获取顶部安全区高度
    this.getTopRectHeight();

    // 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);
  }

  // 获取顶部安全区高度
  private getTopRectHeight(): void {
    window.getLastWindow(getContext(this), (err, data) => {
      if (err.code) {
        Logger.error(TAG, '获取窗口失败: ' + JSON.stringify(err));
        return;
      }
      const area = data.getWindowAvoidArea(window.AvoidAreaType.TYPE_SYSTEM);
      this.topRectHeight = px2vp(area.topRect.height);
      Logger.info(TAG, '顶部安全区高度: ' + this.topRectHeight);
    });
  }

  aboutToDisappear(): void {
    // 取消订阅
    this.webdavManager.unsubscribe(this.eventHandler);
  }

  // 处理WebDAV事件
  private handleWebdavEvent(event: string): void {
    switch (event) {
      case WebdavManagerStates.LoadFilesInfoSucceed:
        this.songs = this.webdavManager.webDavSongs;
        this.updateListData(this.songs)
        // 直接引用webdavManager的数组，避免@Observed序列化问题
        this.webDavFiles = this.webdavManager.webDavFiles;
        this.isLoading = false;

        // 更新可见文件夹列表
        this.updateVisibleFolders();

        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 WebdavManagerStates.LoadFilesInfoFailed:
        this.isLoading = false;
        this.getUIContext().getPromptAction().showToast({ message: '加载失败' });
        break;
      case WebdavManagerStates.InsertAccountSucceed:
      case WebdavManagerStates.EditAccountSucceed:
      case WebdavManagerStates.RemoveAccountSucceed:
        this.loadAccounts();
        break;
    }
  }

  // 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;
    }

    this.isLoading = true;
    this.webdavManager.loadFilesInfoFromWebdav()
      .catch((error: Error) => {
        Logger.error(TAG, '加载文件失败: ' + error.message);
        this.isLoading = false;
      });
  }

  // 进入文件夹
  private enterFolder(folder: FileInfo): void {
    this.isLoading = true;
    this.webdavManager.enterFolder(folder)
      .catch((error: Error) => {
        Logger.error(TAG, '进入文件夹失败: ' + error.message);
        this.isLoading = false;
      });
  }

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

    // 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()){
      this.isLoading = true;
      this.webdavManager.goBack()
        .catch((error: Error) => {
          Logger.error(TAG, '返回失败: ' + error.message);
          this.isLoading = false;
        });
      this.breadcrumbs = this.webdavManager.getBreadcrumbs();
    }

  }

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

  // 播放WebDAV歌曲
  private playSong(song: VideoItem, index: number): void {
    try {
      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 歌曲列表长度: ' + this.songs.length);

      // 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 = this.songs.map(s => s.webdav_account_id).filter(id => id);
        Logger.info(TAG, `heanup 当前歌曲列表中有 ${accountIds.length}/${this.songs.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
        this.songs.forEach((item, idx) => {
          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}`);
          }
        });
      }

      // 直接使用当前的VideoItem数组
      const videoItems: VideoItem[] = this.songs;
      const songFilePaths: string[] = [];

      for (let i = 0; i < this.songs.length; i++) {
        const item = this.songs[i];
        songFilePaths.push(item.filePath); // 使用filePath作为文件路径
      }

      // 保存WebDAV歌曲数据到全局上下文
      const globalContext = GlobalContext.getContext();
      globalContext.setObject('videoItems', videoItems);
      globalContext.setObject('currentPlayIndex', index);
      Logger.info(TAG, 'heanup 已将WebDAV歌曲列表保存到全局上下文，长度：' + videoItems.length);

      // 发送播放事件，类似歌单播放的方式
      const eventPlaylistPlay: emitter.InnerEvent = { eventId: EventConstants.EVENT_PLAYLIST_PLAY };

      const playlistData: PlaylistEventData = {
        playlistId: 'webdav-playlist', // 使用特殊的ID标识WebDAV播放列表
        playlistName: 'WebDAV - ' + (this.selectedAccount?.name || '未知账户'),
        songCount: this.songs.length,
        startIndex: index,
        songFilePaths: songFilePaths
        // 移除webDavAuthInfo，现在直接使用videoItems中的webdav_account_id
      };

      Logger.info(TAG, 'heanup 准备发送WebDAV播放事件，eventId: ' + eventPlaylistPlay.eventId);
      Logger.info(TAG, 'heanup 发送WebDAV播放事件数据: ' + JSON.stringify(playlistData));

      const eventData: emitter.EventData = {
        data: playlistData
      };

      emitter.emit(eventPlaylistPlay, eventData);

      // 跳转到首页播放器
      this.getUIContext()?.animateTo({ duration: 555 }, () => {
        this.mType =0
      })
    } 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' });
    }
  }


  // 导航到指定层级的面包屑路径
  private navigateToBreadcrumb(breadcrumbIndex: number): void {
    try {
      this.isLoading = true;
      this.webdavManager.navigateToBreadcrumb(breadcrumbIndex).then((path: string) => {
        this.webdavManager.enterFolderFromPath(path)
        this.breadcrumbs = this.webdavManager.getBreadcrumbs();
      })
        .catch((error: Error) => {
          Logger.error(TAG, '导航到面包屑路径失败: ' + error.message);
          this.isLoading = false;
        });
    } catch (error) {
      Logger.error(TAG, '导航到面包屑路径异常: ' + (error as Error).message);
      this.isLoading = false;
    }
  }

  build() {
    Column() {
      // 顶部安全区和标题栏
      Column() {
        Blank()
          .height(this.topRectHeight + 5)
          .backgroundColor(this.isDarkMode ? $r('app.color.title_bar_bg') : this.themeColor)
          .expandSafeArea([SafeAreaType.SYSTEM], [SafeAreaEdge.TOP])

        // 标题栏
        Row() {
          Image($r('app.media.menu'))
            .width(24)
            .height(24)
            .margin({ left: 12, right: 8 })
            .onClick(() => {
              this.getUIContext()?.animateTo({ duration: 555 }, () => {
                this.isShowDrawer = !this.isShowDrawer
                this.offsetX = 0
              })
            });


          Text(this.selectedAccount.name || 'WebDav')
            .fontSize(18)
            .fontColor(Color.White)
            .fontWeight(FontWeight.Medium)
            .textAlign(TextAlign.Center)

        }
        .height(48)
        .width('100%')
        .alignItems(VerticalAlign.Center)
        .backgroundColor(this.isDarkMode ? $r('app.color.title_bar_bg') : this.themeColor)
      }

      // 内容区域
      if (this.accounts.length === 0) {
        this.buildEmptyView();
      } else {
        this.buildContentView();
      }
    }
    .width('100%')
    .height('100%')
    .backgroundColor($r('app.color.start_window_background'))
  }

  // 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WebDAV账户')
        .fontSize(16)
        .fontColor($r('app.color.index_tab_font_color'))
        .opacity(0.6)

    }
    .justifyContent(FlexAlign.Center)
    .width('100%')
    .layoutWeight(1)
  }

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


      // 加载按钮和面包屑导航
      Column({ space: 8 }) {

        // 账户信息显示
        // if (this.selectedAccount) {
        //   Row({ space: 12 }) {
        //     // 账户封面
        //     Stack() {
        //       if (this.selectedAccount.coverPath) {
        //         Image(this.selectedAccount.coverPath)
        //           .width(20)
        //           .height(20)
        //           .borderRadius(10)
        //           .objectFit(ImageFit.Cover)
        //           .border({ width: 2, color: this.themeColor })
        //       } else {
        //
        //         Image($r('app.media.cloudDisk'))
        //           .width(20)
        //           .height(20)
        //           .fillColor(this.themeColor)
        //       }
        //     }
        //
        //     // 账户信息
        //     Column({ space: 4 }) {
        //       Text(this.selectedAccount.name || '未知账户')
        //         .fontSize(16)
        //         .fontWeight(FontWeight.Medium)
        //         .fontColor(this.isDarkMode ? '#FFFFFF' : $r('app.color.text_color'))
        //         .maxLines(1)
        //         .textOverflow({ overflow: TextOverflow.Ellipsis })
        //
        //       Text(`${this.selectedAccount.host}:${this.selectedAccount.port}`)
        //         .fontSize(12)
        //         .fontColor(this.isDarkMode ? '#8E8E93' : $r('app.color.index_tab_font_color'))
        //         .opacity(0.7)
        //         .maxLines(1)
        //         .textOverflow({ overflow: TextOverflow.Ellipsis })
        //     }
        //     .alignItems(HorizontalAlign.Start)
        //     .layoutWeight(1)
        //
        //   }
        //   .width('100%')
        //   .padding({ left: 4, right: 4, top: 8, bottom: 8 })
        //   .backgroundColor(this.isDarkMode ? 'rgba(44,44,46,0.8)' : 'rgba(248,248,248,0.8)')
        //   .borderRadius(8)
        //   .margin({ bottom: 8 })
        // }
        //

        // 面包屑导航
        if (this.webdavManager.currentPath !== '') {
          Row({ space: 8 }) {
            Button({ type: ButtonType.Circle }) {
              Image(this.webdavManager.canGoBack()?$r('app.media.back'):$r('app.media.cloudDisk'))
                .width(15)
                .height(15)
                .fillColor(Color.White)
            }
            .width(20)
            .height(20)
            .backgroundColor(this.themeColor)
            .onClick(() => this.goBack())

            Row({ space: 4 }) {
              ForEach(this.breadcrumbs, (crumb: string, index: number) => {
                Row() {
                  Text(crumb)
                    .fontSize(15)
                    .fontColor(this.themeColor)
                    .maxLines(1)
                    .textOverflow({ overflow: TextOverflow.Ellipsis })
                }
                .onClick(() => {
                  this.navigateToBreadcrumb(index);
                })

                // 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 })
        }

        // 统计信息
        if (this.webDavFiles.length > 0) {
          Row() {
            Text(this.visibleFoldersState.length + ' 个文件夹, ' + this.songs.length + ' 首歌曲')
              .fontSize(13)
              .fontColor($r('app.color.index_tab_font_color'))
              .opacity(0.6)
              .layoutWeight(1)
              .textAlign(TextAlign.Start)
            Blank()
          }
          .padding({ left: 4, right: 4 })
        }
      }
      .width('100%')
      .padding(12)
      .margin({ top: 8 })

      // 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(20)
      .visibility(this.isLoading?Visibility.Visible:Visibility.None)
      .opacity(this.isLoading ? 1 : 0)
      .animation({
        duration: 500,
        curve: 'ease-in-out' // 可选动画曲线
      })


      // 文件列表（文件夹 + 歌曲）
      if (this.webDavFiles.length > 0) {
        List({ space: 0 }) {
          // 显示文件夹 - 只显示当前目录下的直接子文件夹
          ForEach(this.visibleFoldersState, (folder: FileInfo) => {
            ListItem() {
              this.buildFolderItem(folder)
            }
            .transition(TransitionEffect.asymmetric(TransitionEffect.scale({ x: 1.2, y: 1.2 }).animation({ duration: 600 }),
              TransitionEffect.scale({ x: 0, y: 0 })))
            .clickEffect({ level: ClickEffectLevel.MIDDLE })
          })

          // 显示歌曲
          LazyForEach(this.dataSource, (song: VideoItem, index: number) => {
            ListItem() {
              this.buildSongItem(song, index)
            }
            .transition(TransitionEffect.asymmetric(TransitionEffect.scale({ x: 1.2, y: 1.2 }).animation({ duration: 600 }),
              TransitionEffect.scale({ x: 0, y: 0 })))
            .clickEffect({ level: ClickEffectLevel.MIDDLE })
          })
        }
        .layoutWeight(1)
        .divider({ strokeWidth: 1, color: this.isDarkMode ? '#333333' :'#EEEEEE' })
        .margin({ top: 4 })
      } else if (!this.isLoading) {
        Column() {
          Text('暂无内容')
            .fontSize(14)
            .fontColor($r('app.color.index_tab_font_color'))
            .opacity(0.6)
          Text('点击"加载文件列表"按钮加载')
            .fontSize(12)
            .fontColor($r('app.color.index_tab_font_color'))
            .opacity(0.4)
            .margin({ top: 8 })
        }
        .justifyContent(FlexAlign.Center)
        .layoutWeight(1)
      }
    }
    .layoutWeight(1)
  }

  // 文件夹列表项
  @Builder
  buildFolderItem(folder: FileInfo) {
    Button({ type: ButtonType.Normal, stateEffect: false }) {
      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('文件夹')
            .fontSize(13)
            .fontColor($r('app.color.index_tab_font_color'))
            .opacity(0.6)
        }
        .alignItems(HorizontalAlign.Start)
        .layoutWeight(1)
      }
    }
    .reuseId('dir_item')
    .width('100%')
    .padding(12)
    .backgroundColor(Color.Transparent)
    // .backgroundColor($r('app.color.start_window_background'))
    .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.8 })
    .onClick(() => {
      this.enterFolder(folder);
      this.breadcrumbs = this.webdavManager.getBreadcrumbs();
    })
  }

  // 歌曲列表项
  @Builder
  buildSongItem(song: VideoItem, index: number) {
    Button({ type: ButtonType.Normal, stateEffect: false }) {
      Row({ space: 12 }) {
        // 序号
        // 歌曲封面
        Image(song.pixelMap)
          .width(48)
          .height(48)
          .borderRadius(4)
          .alt($r('app.media.music_red'))
          .fillColor(this.themeColor)
          .objectFit(ImageFit.Cover)
          .margin({ left: 8 })

        // 歌曲信息
        Column({ space: 4 }) {
          Text(decodeUrlEncodedString(song.name))
            .fontSize(15)
            .fontColor($r('app.color.index_tab_font_color'))
            .maxLines(1)
            .textOverflow({ overflow: TextOverflow.Ellipsis })

          Row(){
            Text(song.artist)
              .fontSize(13)
              .fontColor($r('app.color.index_tab_font_color'))
              .opacity(0.6)
              .maxLines(1)
              .visibility(song.artist?Visibility.Visible:Visibility.None)
              .textOverflow({ overflow: TextOverflow.Ellipsis })
            Text(decodeUrlEncodedString(song.size||"")+'  '+song.cTime)
              .fontSize(13)
              .fontColor($r('app.color.index_tab_font_color'))
              .opacity(0.6)
              .maxLines(1)
              .textOverflow({ overflow: TextOverflow.Ellipsis })
          }


        }
        .alignItems(HorizontalAlign.Start)
        .layoutWeight(1)

        // 播放图标
        Image($r('app.media.ic_play'))
          .width(20)
          .height(20)
          .fillColor($r('app.color.index_tab_font_color'))
          .opacity(0.4)
      }
    }
    .width('100%')
    .padding(12)
    .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.8 })
    .backgroundColor(Color.Transparent)
    .onClick(() => {
      this.playSong(song, index);
    })
  }
}