import { Playlist, PlaylistSong } from '../viewmodel/Playlist';
import { VideoItem } from '../viewmodel/VideoItem';
import PlaylistTable from '../common/util/PlaylistTable';
import MediaTable from '../common/util/MediaTable';
import { emitter } from '@kit.BasicServicesKit';
import { ToastUtil, AppUtil, LogUtil, PreferencesUtil } from '@pura/harmony-utils';
import { showEditPlaylistDialog } from '../dialog/PlaylistDialog';
import { showAddSongsToPlaylistDialog } from '../dialog/AddSongsToPlaylistDialog';
import { router } from '@kit.ArkUI';
import { GlobalContext } from '../common/util/GlobalContext';
import { CommonConstants } from '../common/constants/CommonConstants';
import { EventConstants } from '../common/constants/EventConstants';
import { common } from '@kit.AbilityKit';

/**
 * 歌单播放事件数据
 */
interface PlaylistEventData {
  playlistId: string;
  playlistName: string;
  songCount: number;
  startIndex: number;
  songFilePaths: string[];
}

/**
 * 歌单详情页面
 * 展示歌单信息和歌曲列表
 */
@Entry
@Component
export struct PlaylistDetailPage {
  context = this.getUIContext().getHostContext() as common.UIAbilityContext
  @State playlist: Playlist | null = null
  @State songList: VideoItem[] = []
  @State isLoading: boolean = true
  @State isShowEditDialog: boolean = false
  @State isPlaying: boolean = false
  @State curIndex: number = -1
  @State pageOpacity: number = 0
  @State contentScale: number = 0.95
  @State showContent: boolean = false
  @State isSortMode: boolean = false // 是否处于排序模式

  private playlistTable: PlaylistTable = new PlaylistTable(getContext(this))
  private mediaTable: MediaTable = new MediaTable(getContext(this))
  private playlistId: string = ''
  @StorageProp('themeColor') themeColor: string = CommonConstants.DEFAULT_THEME_COLOR;

  aboutToAppear() {
    let themeColor = PreferencesUtil.getStringSync('THEME_COLOR', CommonConstants.DEFAULT_THEME_COLOR);
    AppStorage.setOrCreate('themeColor', themeColor);
    this.themeColor = themeColor
    // 获取传入的歌单对象
    const params = router.getParams() as Record<string, Object>
    if (params && params['playlist']) {
      this.playlist = params['playlist'] as Playlist
      this.playlistId = this.playlist.id
      this.loadPlaylistDetail()
    }

    // 监听播放状态变化
    this.setupPlaybackStatusListener()
  }

  aboutToDisappear() {
    // 移除事件监听
    this.removePlaybackStatusListener()
  }

  /**
   * 加载歌单详情
   */
  async loadPlaylistDetail() {
    try {
      this.isLoading = true

      if (!this.playlist) {
        ToastUtil.showToast('歌单不存在')
        router.back()
        return
      }

      // 加载歌单歌曲
      const playlistSongs = await this.playlistTable.queryPlaylistSongs(this.playlistId)

      // 将 PlaylistSong 转换为 VideoItem
      this.songList = await convertPlaylistSongsToVideoItems(this.context,playlistSongs)

      // 歌单加载完成后，加载当前播放状态
      this.loadCurrentPlaybackStatus()
    } catch (error) {
      LogUtil.error('heanup 加载歌单详情失败: ' + error)
      ToastUtil.showToast('加载歌单详情失败')
    } finally {
      this.isLoading = false
      // 启动页面进入动画
      this.animatePageEntry()
    }
  }

  /**
   * 格式化时长显示
   */
  formatDuration(duration?: number): string {
    if (!duration || duration <= 0) {
      return ''
    }

    const minutes = Math.floor(duration / 60)
    const seconds = Math.floor(duration % 60)
    return `${minutes}:${seconds.toString().padStart(2, '0')}`
  }

  /**
   * 计算歌单总时长
   */
  calculateTotalDuration(): number {
    let total = 0
    for (const song of this.songList) {
      const duration = song.duration || 0
      total = total + (typeof duration === 'number' ? duration : 0)
    }
    return total
  }

  /**
   * 格式化总时长显示
   */
  formatTotalDuration(totalSeconds: number): string {
    if (totalSeconds <= 0) {
      return ''
    }

    const hours = Math.floor(totalSeconds / 3600)
    const minutes = Math.floor((totalSeconds % 3600) / 60)

    if (hours > 0) {
      return `${hours}小时${minutes}分钟`
    } else {
      return `${minutes}分钟`
    }
  }

  /**
   * 页面入场动画
   */
  animatePageEntry() {
    animateTo({
      duration: 600,
      curve: Curve.EaseOut,
      delay: 100,
      onFinish: () => {
        this.showContent = true
      }
    }, () => {
      this.pageOpacity = 1
      this.contentScale = 1
    })
  }

  /**
   * 设置播放状态监听
   */
  setupPlaybackStatusListener() {
    try {
      // 监听播放状态变化事件
      const eventPlaybackStatus: emitter.InnerEvent = { eventId: EventConstants.EVENT_PLAYBACK_STATUS }
      emitter.on(eventPlaybackStatus, (eventData: emitter.EventData) => {
        LogUtil.info('heanup PlaylistDetailPage 收到播放状态变化事件：'+ JSON.stringify(eventData))
        if (eventData.data) {
          const data = eventData.data as Record<string, Object>
          const oldIsPlaying = this.isPlaying
          const oldCurIndex = this.curIndex

          this.isPlaying = data['isPlaying'] as boolean
          const currentFilePath = data['currentFilePath'] as string

          LogUtil.info(`heanup 原始播放状态: isPlaying=${this.isPlaying}, currentFilePath=${currentFilePath}`)

          // 通过filePath在当前歌单中查找对应的索引
          if (currentFilePath) {
            const matchedIndex = this.songList.findIndex(song => song.filePath === currentFilePath)
            if (matchedIndex !== -1) {
              this.curIndex = matchedIndex
              LogUtil.info(`heanup 在歌单中找到匹配的歌曲: ${this.songList[matchedIndex].name}, 索引: ${matchedIndex}`)
            } else {
              // 当前播放的歌曲不在本歌单中，重置索引
              this.curIndex = -1
              LogUtil.info(`heanup 当前播放的歌曲不在本歌单中: ${currentFilePath}`)
            }
          } else {
            this.curIndex = -1
            LogUtil.info(`heanup 当前没有播放歌曲`)
          }

          LogUtil.info(`heanup 播放状态更新: isPlaying=${oldIsPlaying}->${this.isPlaying}, curIndex=${oldCurIndex}->${this.curIndex}`)
        }
      })
    } catch (error) {
      LogUtil.error('heanup 设置播放状态监听失败: ' + error)
    }
  }

  /**
   * 移除播放状态监听
   */
  removePlaybackStatusListener() {
    try {
      emitter.off(EventConstants.EVENT_PLAYBACK_STATUS)
    } catch (error) {
      LogUtil.error('heanup 移除播放状态监听失败: ' + error)
    }
  }

  /**
   * 加载当前播放状态
   */
  loadCurrentPlaybackStatus() {
    try {
      // 从AppStorage获取当前播放的歌曲
      const currentSong = AppStorage.get<VideoItem>('currentSong')
      if (currentSong && currentSong.filePath) {
        LogUtil.info(`heanup 获取到当前播放歌曲: ${currentSong.name}, filePath: ${currentSong.filePath}`)

        // 在歌单中查找匹配的歌曲
        const matchedIndex = this.songList.findIndex(song => song.filePath === currentSong.filePath)
        if (matchedIndex !== -1) {
          this.curIndex = matchedIndex
          // 假设如果有currentSong说明正在播放
          this.isPlaying = true
          LogUtil.info(`heanup 在歌单中找到当前播放的歌曲: ${this.songList[matchedIndex].name}, 索引: ${matchedIndex}`)
        } else {
          LogUtil.info(`heanup 当前播放的歌曲不在本歌单中`)
        }
      } else {
        LogUtil.info(`heanup 当前没有播放歌曲`)
      }
    } catch (error) {
      LogUtil.error('heanup 加载当前播放状态失败: ' + error)
    }
  }



  /**
   * 播放歌单
   */
  playPlaylist() {
    if (this.songList.length === 0) {
      ToastUtil.showToast('歌单为空')
      return
    }

    // 发送播放歌单事件
    const eventPlaylistPlay: emitter.InnerEvent = { eventId: EventConstants.EVENT_PLAYLIST_PLAY }

    LogUtil.info(`heanup 准备发送播放事件，playlist: ${this.playlist ? '存在' : '不存在'}, songs: ${this.songList.length}首`)

    // 构建歌单播放事件数据
    const playlistData: PlaylistEventData = {
      playlistId: this.playlist?.id || '',
      playlistName: this.playlist?.name || '',
      songCount: this.songList.length,
      startIndex: 0,
      // 只发送歌曲的必要信息
      songFilePaths: this.songList.map(song => song.filePath)
    };

    LogUtil.info(`heanup 发送歌单播放事件数据: ${JSON.stringify(playlistData)}`)

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

    emitter.emit(eventPlaylistPlay, eventData)
    
    ToastUtil.showToast('开始播放歌单')
  }

  /**
   * 撌放指定歌曲
   */
  playSong(song: VideoItem, index: number) {
    LogUtil.info(`heanup === playSong 方法被调用 ===`)
    LogUtil.info(`heanup 播放指定歌曲: ${song.name}, 索引: ${index}`)
    LogUtil.info(`heanup 歌曲列表长度: ${this.songList.length}`)
    LogUtil.info(`heanup 歌单ID: ${this.playlist?.id}, 歌单名称: ${this.playlist?.name}`)

    // 检查歌曲文件路径
    LogUtil.info(`heanup 所有歌曲文件路径: ${JSON.stringify(this.songList.map(s => s.filePath))}`)

    // 发送播放歌单事件
    const eventPlaylistPlay: emitter.InnerEvent = { eventId: EventConstants.EVENT_PLAYLIST_PLAY }
    const playlistData: PlaylistEventData = {
      playlistId: this.playlist?.id || '',
      playlistName: this.playlist?.name || '',
      songCount: this.songList.length,
      startIndex: index,
      // 只发送所有歌曲的文件路径
      songFilePaths: this.songList.map(s => s.filePath)
    };

    LogUtil.info(`heanup 准备发送事件，eventId: ${eventPlaylistPlay.eventId}`)
    LogUtil.info(`heanup 发送歌单播放事件数据: ${JSON.stringify(playlistData)}`)

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

    LogUtil.info(`heanup eventData对象: ${JSON.stringify(eventData)}`)
    emitter.emit(eventPlaylistPlay, eventData)
  }

  /**
   * 编辑歌单
   */
  editPlaylist() {
    if (this.playlist) {
      showEditPlaylistDialog(
        this.playlist,
        async (name: string, description: string) => {
          if (this.playlist) {
            this.playlist.name = name
            this.playlist.description = description
            const success = await this.playlistTable.updatePlaylist(this.playlist.id, name, description)
            if (success) {
              ToastUtil.showToast('歌单更新成功')
              // 发送刷新事件
              const eventRefresh: emitter.InnerEvent = { eventId: EventConstants.EVENT_PLAYLIST_REFRESH }
              emitter.emit(eventRefresh, {})
            } else {
              ToastUtil.showToast('歌单更新失败')
            }
          }
        }
      )
    }
  }

  /**
   * 删除歌单
   */
  async deletePlaylist() {
    if (this.playlist) {
      // 显示确认对话框
      AlertDialog.show({
        title: '删除歌单',
        message: `确定要删除歌单"${this.playlist.name}"吗？此操作不可撤销。`,
        primaryButton: {
          value: '取消',
          action: () => {}
        },
        secondaryButton: {
          value: '删除',
          fontColor: Color.Red,
          action: async () => {
            const success = await this.playlistTable.deletePlaylist(this.playlistId)
            if (success) {
              ToastUtil.showToast('歌单删除成功')
              // 发送刷新事件
              emitter.emit({ eventId: EventConstants.EVENT_PLAYLIST_REFRESH }, {})
              router.back()
            } else {
              ToastUtil.showToast('歌单删除失败')
            }
          }
        }
      })
    }
  }

  /**
   * 从歌单移除歌曲
   */
  async removeSongFromPlaylist(song: VideoItem) {
    if (this.playlist) {
      const success = await this.playlistTable.removeSongFromPlaylist(this.playlistId, song.filePath)
      if (success) {
        // 从本地列表移除
        const index = this.songList.findIndex(s => s.filePath === song.filePath)
        if (index !== -1) {
          this.songList.splice(index, 1)
          this.songList = [...this.songList] // 触发UI更新
        }
        
        // 更新歌单信息
        this.playlist.songCount = this.songList.length
        await this.playlistTable.updatePlaylist(this.playlist.id, this.playlist.name, this.playlist.description)
        
        ToastUtil.showToast('已从歌单移除')
      } else {
        ToastUtil.showToast('移除失败')
      }
    }
  }

  build() {
    Column() {
      // 顶部安全区和标题栏
      Column() {
        Blank()
          .height(px2vp(AppUtil.getStatusBarHeight()))
          .backgroundColor($r('app.color.title_bar_bg'))
          .expandSafeArea([SafeAreaType.SYSTEM], [SafeAreaEdge.TOP])
        
        // 标题栏
        Row() {
          Image($r('app.media.back'))
            .width(24)
            .height(24)
            .margin({ left: 12, right: 8 })
            .onClick(() => {
              // 如果在排序模式，先退出排序模式
              if (this.isSortMode) {
                this.exitSortMode()
              } else {
                router.back()
              }
            })

          Text(this.isSortMode ? '排序模式' : (this.playlist?.name || '歌单详情'))
            .fontSize(18)
            .fontColor(Color.White)
            .fontWeight(FontWeight.Medium)
            .layoutWeight(1)
            .textAlign(TextAlign.Center)

          // 排序/完成按钮
          Text(this.isSortMode ? '完成' : '排序')
            .fontSize(16)
            .fontColor(Color.White)
            .margin({ right: 12 })
            .onClick(() => {
              if (this.isSortMode) {
                this.exitSortMode()
              } else {
                this.enterSortMode()
              }
            })
        }
        .height(48)
        .width('100%')
        .alignItems(VerticalAlign.Center)
        .backgroundColor($r('app.color.title_bar_bg'))
      }

      if (this.isLoading) {
        // 加载状态
        Column() {
          LoadingProgress()
            .width(40)
            .height(40)
            .color(this.themeColor )
          
          Text('加载中...')
            .fontSize(14)
            .fontColor($r('app.color.text_color'))
            .margin({ top: 12 })
        }
        .layoutWeight(1)
        .justifyContent(FlexAlign.Center)
      } else if (this.playlist) {
        // 歌单信息区域 - 参考LocalMusic的封面标题区域设计
        Column() {
          // 背景区域
          Row() {
            Column() {
              // 歌单封面
              Image(this.playlist.coverPath || $r('app.media.hm_playlist'))
                .width(100)
                .height(100)
                .borderRadius(12)
                .clip(true)
                .interpolation(ImageInterpolation.High)
                .autoResize(true)
                .shadow({
                  radius: 15,
                  color: '#0000001a',
                  offsetX: 0,
                  offsetY: 6
                })
            }
            .alignItems(HorizontalAlign.Start)
            .margin({ left: 24, top: 16, bottom: 16 })

            Column() {
              // 歌单名称
              Text(this.playlist.name)
                .fontSize(20)
                .fontWeight(FontWeight.Bold)
                .fontColor($r('app.color.text_color'))
                .maxLines(2)
                .textOverflow({ overflow: TextOverflow.Ellipsis })
                .margin({ bottom: 8 })

              // 歌单描述
              if (this.playlist.description) {
                Text(this.playlist.description)
                  .fontSize(14)
                  .fontColor($r('app.color.text_color'))
                  .opacity(0.8)
                  .maxLines(2)
                  .textOverflow({ overflow: TextOverflow.Ellipsis })
                  .margin({ bottom: 12 })
                  .lineHeight(18)
              }

              // 歌单统计信息
              Row() {
                Text(`共${this.playlist.songCount}首歌`)
                  .fontSize(13)
                  .fontWeight(FontWeight.Bold)
                  .fontColor($r('app.color.text_color'))
                  .opacity(0.8)

                if (this.calculateTotalDuration() > 0) {
                  Text(` · ${this.formatTotalDuration(this.calculateTotalDuration())}`)
                    .fontSize(13)
                    .fontColor($r('app.color.text_color'))
                    .opacity(0.7)
                    .margin({ left: 4 })
                }
              }
              .margin({ top: 8 })
            }
            .height('100%')
            .layoutWeight(1)
            .margin({ left: 16 })
            .justifyContent(FlexAlign.Center)
            .alignItems(HorizontalAlign.Start)
          }
          .width('100%')
          .height(140)
          .justifyContent(FlexAlign.SpaceBetween)
          .padding({ right: 24 })

          // 操作按钮区域
          Row({ space: 12 }) {
            // 播放全部按钮 - 参考LocalMusic的按钮样式
            Button() {
              Row({ space: 8 }) {
                Image($r('app.media.ic_play'))
                  .width(16)
                  .height(16)
                  .fillColor(Color.White)

                Text('播放全部')
                  .fontSize(14)
                  .fontColor(Color.White)
                  .fontWeight(FontWeight.Medium)
              }
              .justifyContent(FlexAlign.Center)
            }
            .layoutWeight(1)
            .height(44)
            .backgroundColor(this.themeColor )
            .borderRadius(22)
            .shadow({
              radius: 8,
              color: '#0a59f740',
              offsetX: 0,
              offsetY: 4
            })
            .onClick(() => {
              this.playPlaylist()
            })
            .stateStyles({
              normal: {
                .backgroundColor(this.themeColor )
                .scale({ x: 1, y: 1 })
              },
              pressed: {
                .backgroundColor('#0a59f7cc')
                .scale({ x: 0.96, y: 0.96 })
              }
            })
            .animation({
              duration: 150,
              curve: Curve.EaseInOut
            })

            // 编辑歌单按钮
            Button() {
              Row({ space: 6 }) {
                Text('✏️')
                  .fontSize(16)
                  .fontColor(this.themeColor )

                Text('编辑')
                  .fontSize(14)
                  .fontColor(this.themeColor )
                  .fontWeight(FontWeight.Medium)
              }
              .justifyContent(FlexAlign.Center)
            }
            .layoutWeight(1)
            .height(44)
            .backgroundColor(Color.Transparent)
            .borderRadius(22)
            .border({
              width: 1.5,
              color: this.themeColor
            })
            .onClick(() => {
              this.editPlaylist()
            })
            .stateStyles({
              normal: {
                .backgroundColor(Color.Transparent)
                .scale({ x: 1, y: 1 })
              },
              pressed: {
                .backgroundColor('#0a59f715')
                .scale({ x: 0.96, y: 0.96 })
              }
            })
            .animation({
              duration: 150,
              curve: Curve.EaseInOut
            })

            // 删除按钮
            Button() {
              Row({ space: 6 }) {
                Text('🗑️')
                  .fontSize(16)

                Text('删除')
                  .fontSize(14)
                  .fontColor(Color.Red)
                  .fontWeight(FontWeight.Medium)
              }
              .justifyContent(FlexAlign.Center)
            }
            .layoutWeight(1)
            .height(44)
            .backgroundColor(Color.Transparent)
            .borderRadius(22)
            .border({
              width: 1.5,
              color: Color.Red
            })
            .onClick(() => {
              this.deletePlaylist()
            })
            .stateStyles({
              normal: {
                .backgroundColor(Color.Transparent)
                .scale({ x: 1, y: 1 })
              },
              pressed: {
                .backgroundColor('#ff000015')
                .scale({ x: 0.96, y: 0.96 })
              }
            })
            .animation({
              duration: 150,
              curve: Curve.EaseInOut
            })
          }
          .width('100%')
          .padding({ left: 24, right: 24, bottom: 20 })
          .justifyContent(FlexAlign.Start)
        }
        .backgroundColor($r('app.color.bg_card'))
        .margin({ left: 16, right: 16, top: 16 })
        .borderRadius(16)
        .shadow({
          radius: 12,
          color: '#00000014',
          offsetX: 0,
          offsetY: 4
        })
        .scale({ x: this.contentScale, y: this.contentScale })
        .opacity(this.pageOpacity)
        .transition(TransitionEffect.OPACITY.animation({ duration: 600, curve: Curve.EaseOut }))
        .transition(TransitionEffect.scale({ x: 0.95, y: 0.95 }).animation({ duration: 600, curve: Curve.EaseOut }))

        // 歌曲列表标题 - 简化设计，与LocalMusic保持一致
        if (this.songList.length > 0) {
          Row() {
            Text('歌曲列表')
              .fontSize(16)
              .fontWeight(FontWeight.Medium)
              .fontColor($r('app.color.text_color'))
              .opacity(0.9)
              .layoutWeight(1)

            Text(`${this.songList.length}首`)
              .fontSize(14)
              .fontColor($r('app.color.text_color'))
              .opacity(0.6)

            // 添加歌曲按钮
            Button() {
              Row({ space: 6 }) {
                Text('+')
                  .fontSize(18)
                  .fontColor(Color.White)

                Text('添加歌曲')
                  .fontSize(14)
                  .fontColor(Color.White)
                  .fontWeight(FontWeight.Medium)
              }
              .justifyContent(FlexAlign.Center)
              .padding({ left: 16, right: 16, top: 8, bottom: 8 })
            }
            .height(36)
            .backgroundColor(this.themeColor)
            .borderRadius(18)
            .margin({ left: 12 })
            .onClick(() => {
              this.addSongsToPlaylist()
            })
            .stateStyles({
              normal: {
                .backgroundColor(this.themeColor)
                .scale({ x: 1, y: 1 })
              },
              pressed: {
                .backgroundColor('#0a59f7cc')
                .scale({ x: 0.96, y: 0.96 })
              }
            })
            .animation({
              duration: 150,
              curve: Curve.EaseInOut
            })
          }
          .width('100%')
          .padding({ left: 24, right: 24, top: 16, bottom: 12 })
          .opacity(this.pageOpacity)
          .transition(TransitionEffect.OPACITY.animation({ duration: 800, curve: Curve.EaseOut, delay: 200 }))
        }

        // 歌曲列表 - 参考LocalMusic的MusicItem样式
        if (this.songList.length > 0) {
          List({ space: 0 }) {
            ForEach(this.songList, (song: VideoItem, index: number) => {
              ListItem() {
                Button({ type: ButtonType.Normal, stateEffect: true }) {
                  Row() {
                    // 歌曲封面 - 改为圆形
                    Stack() {
                      Image(song.pixelMapPath || $r('app.media.music_red'))
                        .width(48)
                        .height(48)
                        .borderRadius(24) // 改为圆形
                        .objectFit(ImageFit.Cover)
                        .interpolation(ImageInterpolation.High)
                        .autoResize(true)
                        .margin({ left: 16 })
                        .onClick(() => {
                          this.playSong(song, index)
                        })
                    }
                    .width(64)

                    // 歌曲信息 - 参考LocalMusic的布局
                    Column() {
                      Row() {
                        // 歌曲名称
                        Text(song.name || song.fileName || '')
                          .fontSize(16)
                          .fontColor(this.isPlaying && this.curIndex === index ? this.themeColor : $r('app.color.text_color'))
                          .fontWeight(this.isPlaying && this.curIndex === index ? FontWeight.Bold : FontWeight.Normal)
                          .maxLines(1)
                          .textOverflow({ overflow: TextOverflow.Ellipsis })
                          .layoutWeight(1)
                          .margin({ top: 8, left: 12 })

                        // 音质标签
                        if (song.md5Str) {
                          Text(song.md5Str?.includes('Lossless') ? '无损' : song.md5Str)
                            .fontSize(10)
                            .fontColor($r('app.color.text_color'))
                            .fontWeight(500)
                            .padding({ top: 2, right: 6, left: 6, bottom: 2 })
                            .borderRadius(4)
                            .margin({ top: 8, left: 8 })
                            .backgroundColor( '#FFC107')
                            .visibility(song.md5Str ? Visibility.Visible : Visibility.None)
                        }
                      }
                      .width('100%')

                      // 歌手和专辑信息 - 参考LocalMusic的第二行布局
                      Row() {
                          Text(song.artist)
                            .fontSize(13)
                            .fontColor(this.isPlaying && this.curIndex === index ?this.themeColor : $r('app.color.text_color'))
                            .fontWeight(this.isPlaying && this.curIndex === index ? FontWeight.Medium : FontWeight.Normal)
                            .maxLines(1)
                            .textOverflow({ overflow: TextOverflow.Ellipsis })
                            .layoutWeight(1)
                            .opacity(this.isPlaying && this.curIndex === index ? 1.0 : 0.8)
                          Text(song.album)
                            .fontSize(13)
                            .fontColor(this.isPlaying && this.curIndex === index ? this.themeColor  : $r('app.color.text_color'))
                            .fontWeight(this.isPlaying && this.curIndex === index ? FontWeight.Medium : FontWeight.Normal)
                            .maxLines(1)
                            .textOverflow({ overflow: TextOverflow.Ellipsis })
                            .layoutWeight(1)
                            .opacity(this.isPlaying && this.curIndex === index ? 1.0 : 0.8)

                        // 时长显示
                        if (song.duration && typeof song.duration === 'number' && song.duration > 0) {
                          Text(this.formatDuration(song.duration))
                            .fontSize(13)
                            .fontColor(this.isPlaying && this.curIndex === index ? this.themeColor  : $r('app.color.text_color'))
                            .fontWeight(this.isPlaying && this.curIndex === index ? FontWeight.Medium : FontWeight.Normal)
                            .opacity(this.isPlaying && this.curIndex === index ? 1.0 : 0.7)
                            .margin({ right: 20 })
                        }
                      }
                      .width('100%')
                      .margin({ left: 12, top: 4 })
                      .alignItems(VerticalAlign.Center)
                    }
                    .layoutWeight(1)
                    .alignItems(HorizontalAlign.Start)
                    .justifyContent(FlexAlign.Center)


                    // 排序模式下显示上下移动按钮，否则显示更多按钮
                    if (this.isSortMode) {
                      Row({ space: 8 }) {
                        // 上移按钮
                        Text('▲')
                          .fontSize(16)
                          .fontColor(index === 0 ? '#cccccc' : this.themeColor)
                          .onClick(() => {
                            if (index > 0) {
                              this.moveSong(index, index - 1)
                            }
                          })
                          .enabled(index > 0)

                        // 下移按钮
                        Text('▼')
                          .fontSize(16)
                          .fontColor(index === this.songList.length - 1 ? '#cccccc' : this.themeColor)
                          .onClick(() => {
                            if (index < this.songList.length - 1) {
                              this.moveSong(index, index + 1)
                            }
                          })
                          .enabled(index < this.songList.length - 1)
                      }
                      .margin({ right: 15 })
                    } else {
                      Text('⋯')
                        .fontSize(20)
                        .fontColor($r('app.color.text_color'))
                        .opacity(0.6)
                        .margin({ right: 15 })
                        .onClick(() => {
                          this.showSongMenu(song)
                        })
                    }
                  }
                  .width('100%')
                  .height(70)
                  .justifyContent(FlexAlign.Start)
                  .alignItems(VerticalAlign.Center)
                }
                .backgroundColor(Color.Transparent)
                .height(70)
                .width('100%')
                .onClick(() => {
                  // 排序模式下禁用点击播放
                  if (!this.isSortMode) {
                    this.playSong(song, index)
                  }
                })
                .gesture(
                  LongPressGesture()
                    .onAction(() => {
                      // 排序模式下不显示菜单
                      if (!this.isSortMode) {
                        this.showSongMenu(song)
                      }
                    })
                )
                .stateStyles({
                  normal: {
                    .backgroundColor(Color.Transparent)
                  },
                  pressed: {
                    .backgroundColor(this.isSortMode ? Color.Transparent : '#f1f3f5')
                  }
                })
                // 当前播放歌曲的背景高亮
                .backgroundColor(this.isPlaying && this.curIndex === index ? '#f0f8ff' : Color.Transparent)
                .border({
                  width: { left: this.isPlaying && this.curIndex === index ? 3 : 0 },
                  color: this.themeColor 
                })
                .opacity(this.pageOpacity)
                .translate({ x: 0, y: this.showContent ? 0 : 20 })
                .transition(TransitionEffect.OPACITY.animation({
                  duration: 600,
                  curve: Curve.EaseOut,
                  delay: 300 + index * 30
                }))
                .transition(TransitionEffect.translate({ y: 20 }).animation({
                  duration: 600,
                  curve: Curve.EaseOut,
                  delay: 300 + index * 30
                }))
              }
            })
          }
          .width('100%')
          .layoutWeight(1)
          .backgroundColor($r('app.color.bg_card'))
          .margin({ left: 16, right: 16 })
          .borderRadius(12)
          .divider({
            strokeWidth: 0.5,
            color: '#0000001a',
            startMargin: 80,
            endMargin: 20
          })
          .opacity(this.pageOpacity)
          .scale({ x: this.contentScale, y: this.contentScale })
          .transition(TransitionEffect.OPACITY.animation({ duration: 800, curve: Curve.EaseOut, delay: 200 }))
          .transition(TransitionEffect.scale({ x: 0.95, y: 0.95 }).animation({ duration: 800, curve: Curve.EaseOut, delay: 200 }))
        } else {
          // 空状态
          Column() {
            // 空状态容器
            Column() {
              // 空状态图标容器
              Stack() {
                // 背景圆圈
                Circle({ width: 160, height: 160 })
                  .fill('#0a59f715')
                  .border({
                    width: 2,
                    color: '#0a59f71a'
                  })

                // 中间圆圈
                Circle({ width: 120, height: 120 })
                  .fill('#0a59f722')

                // 音符图标
                Image($r('app.media.music_red'))
                  .width(64)
                  .height(64)
                  .opacity(0.6)
                  .fillColor(this.themeColor )
              }
              .margin({ bottom: 32 })

              // 空状态标题
              Text('歌单还是空的')
                .fontSize(22)
                .fontColor($r('app.color.text_color'))
                .fontWeight(FontWeight.Bold)
                .margin({ bottom: 12 })
                .letterSpacing(0.5)

              // 空状态描述
              Text('快来添加你喜欢的音乐吧\n让这个歌单充满美妙的旋律')
                .fontSize(15)
                .fontColor($r('app.color.text_color'))
                .opacity(0.8)
                .margin({ bottom: 40 })
                .textAlign(TextAlign.Center)
                .lineHeight(24)
                .maxLines(2)

              // 添加歌曲按钮
              Button() {
                Row({ space: 8 }) {
                  Text('+')
                    .fontSize(20)
                    .fontColor(Color.White)

                  Text('添加歌曲')
                    .fontSize(16)
                    .fontColor(Color.White)
                    .fontWeight(FontWeight.Medium)
                }
                .justifyContent(FlexAlign.Center)
              }
              .width(160)
              .height(48)
              .backgroundColor(this.themeColor )
              .borderRadius(24)
              .shadow({
                radius: 12,
                color: '#0a59f74d',
                offsetX: 0,
                offsetY: 6
              })
              .onClick(() => {
                showAddSongsToPlaylistDialog(
                  this.playlist!,
                  async (songs: VideoItem[]) => {
                    // 添加选中的歌曲到歌单
                    const success = await this.playlistTable.addSongsToPlaylist(this.playlistId, songs.map(song => song.filePath))
                    
                    if (success) {
                      ToastUtil.showToast(`成功添加 ${songs.length} 首歌曲`)
                      // 重新加载歌单详情
                      this.loadPlaylistDetail()
                    } else {
                      ToastUtil.showToast('添加歌曲失败')
                    }
                  }
                )
              })
              .stateStyles({
                normal: {
                  .backgroundColor(this.themeColor )
                  .scale({ x: 1, y: 1 })
                },
                pressed: {
                  .backgroundColor('#0a59f7cc')
                  .scale({ x: 0.96, y: 0.96 })
                }
              })
              .animation({
                duration: 200,
                curve: Curve.EaseInOut
              })

              // 快速操作提示
              Text('或长按歌单选择更多操作')
                .fontSize(13)
                .fontColor($r('app.color.text_color'))
                .margin({ top: 16 })
                .opacity(0.7)
            }
            .width('100%')
            .padding(32)
            .backgroundColor($r('app.color.bg_card'))
            .borderRadius(20)
            .margin({ left: 16, right: 16 })
            .shadow({
              radius: 16,
              color: '#0000000f',
              offsetX: 0,
              offsetY: 8
            })
            .opacity(this.pageOpacity)
            .scale({ x: this.contentScale, y: this.contentScale })
            .transition(TransitionEffect.OPACITY.animation({ duration: 800, curve: Curve.EaseOut, delay: 200 }))
            .transition(TransitionEffect.scale({ x: 0.95, y: 0.95 }).animation({ duration: 800, curve: Curve.EaseOut, delay: 200 }))
          }
          .layoutWeight(1)
          .margin({ left: 16, right: 16 })
          .justifyContent(FlexAlign.Center)
          .padding({ top: 20, bottom: 20 })
        }
      }
    }
    .width('100%')
    .height('100%')
    .backgroundColor($r('app.color.index_background'))
  }

  /**
   * 显示更多菜单
   */
  showMoreMenu() {
    // 简单直接的二选一，避免复杂的多级菜单
    AlertDialog.show({
      title: '歌单操作',
      message: '🎵 添加歌曲：向歌单添加新音乐\n✏️ 编辑歌单：修改歌单信息\n\n点击"确定"添加歌曲，点击"取消"编辑歌单',
      primaryButton: {
        value: '取消 (编辑)',
        action: () => {
          this.editPlaylist()
        }
      },
      secondaryButton: {
        value: '确定 (添加)',
        action: () => {
          this.addSongsToPlaylist()
        }
      }
    })
  }

  /**
   * 添加歌曲到歌单
   */
  addSongsToPlaylist() {
    if (this.playlist) {
      showAddSongsToPlaylistDialog(
        this.playlist,
        async (songs: VideoItem[]) => {
          // 添加选中的歌曲到歌单
          const success = await this.playlistTable.addSongsToPlaylist(this.playlistId, songs.map(song => song.filePath))

          if (success) {
            ToastUtil.showToast(`成功添加 ${songs.length} 首歌曲`)
            // 重新加载歌单详情
            this.loadPlaylistDetail()
          } else {
            ToastUtil.showToast('添加歌曲失败')
          }
        }
      )
    }
  }

  /**
   * 显示歌曲菜单
   */
  showSongMenu(song: VideoItem) {
    AlertDialog.show({
      title: song.name,
      message: '',
      primaryButton: {
        value: '取消',
        action: () => {}
      },
      secondaryButton: {
        value: '从歌单移除',
        fontColor: Color.Red,
        action: () => {
          this.removeSongFromPlaylist(song)
        }
      }
    })
  }

  /**
   * 进入排序模式
   */
  enterSortMode() {
    this.isSortMode = true
    ToastUtil.showToast('点击上下箭头调整歌曲顺序')
    LogUtil.info('heanup 进入排序模式')
  }

  /**
   * 退出排序模式
   */
  exitSortMode() {
    this.isSortMode = false
    ToastUtil.showToast('排序已保存')
    LogUtil.info('heanup 退出排序模式')
  }

  /**
   * 移动歌曲位置
   */
  async moveSong(fromIndex: number, toIndex: number) {
    if (fromIndex === toIndex || fromIndex < 0 || toIndex < 0 ||
      fromIndex >= this.songList.length || toIndex >= this.songList.length) {
      return
    }

    LogUtil.info(`heanup 移动歌曲: from ${fromIndex} to ${toIndex}`)

    // 1. 在本地数组中移动
    const movedSong = this.songList.splice(fromIndex, 1)[0]
    this.songList.splice(toIndex, 0, movedSong)

    // 2. 触发UI更新
    this.songList = [...this.songList]

    // 3. 更新数据库中的sortOrder
    await this.updateAllSongsSortOrder()
  }

  /**
   * 更新所有歌曲的sortOrder到数据库
   */
  async updateAllSongsSortOrder() {
    try {
      LogUtil.info('heanup 开始更新所有歌曲的sortOrder')

      for (let i = 0; i < this.songList.length; i++) {
        const song = this.songList[i]
        const success = await this.playlistTable.updatePlaylistSongSortOrder(
          this.playlistId,
          song.filePath,
          i
        )

        if (success) {
          LogUtil.info(`heanup 更新歌曲[${i}] ${song.name} sortOrder成功`)
        } else {
          LogUtil.error(`heanup 更新歌曲[${i}] ${song.name} sortOrder失败`)
        }
      }

      LogUtil.info('heanup 所有歌曲sortOrder更新完成')
    } catch (error) {
      LogUtil.error('heanup 更新歌曲sortOrder失败: ' + error)
    }
  }
}

/**
 * 将 PlaylistSong 转换为 VideoItem
 */
export async function convertPlaylistSongsToVideoItems(context: Context,playlistSongs: PlaylistSong[]): Promise<VideoItem[]> {
  const videoItems: VideoItem[] = []

  LogUtil.info(`heanup 开始转换歌曲，共 ${playlistSongs.length} 首`)

  const mediaTable: MediaTable = new MediaTable(context)
  await new Promise<void>((resolve, reject) => {
    mediaTable.getRdbStore(context,  (err:Error) => {
      err ? reject(err) : resolve();
    });
  });
  for (const playlistSong of playlistSongs) {
    try {
      LogUtil.info(`heanup 查询歌曲: ${playlistSong.songFilePath}`)

      // 从数据库查询完整的歌曲信息
      const videoItem = await mediaTable.queryVideoByFilePath(playlistSong.songFilePath)

      if (videoItem) {
        LogUtil.info(`heanup 找到歌曲: ${videoItem.name}`)
        videoItems.push(videoItem)
      } else {
        LogUtil.warn(`heanup 数据库中未找到歌曲: ${playlistSong.songFilePath}`)

        // 如果数据库中没有，创建一个基本的 VideoItem
        const fileName = playlistSong.songFilePath.split('/').pop() || ''
        const name = fileName.replace(/\.[^/.]+$/, "") // 移除文件扩展名

        const basicVideoItem = new VideoItem(
          name, // name
          Date.now().toString() + Math.random(), // id
          playlistSong.songFilePath, // filePath
          0, // type (音乐类型)
          0, // videoSize
          playlistSong.addTime, // cTime
          undefined, // pixelMap
          undefined, // size
          undefined, // pixelMapPath
          undefined, // artist
          undefined, // album
          fileName, // fileName
          undefined // lastPlayed
        )

        videoItems.push(basicVideoItem)
      }
    } catch (error) {
      LogUtil.error('heanup 转换歌曲失败: ' + error)
    }
  }

  LogUtil.info(`heanup 转换完成，共 ${videoItems.length} 首歌曲`)
  return videoItems
}