import { common } from '@kit.AbilityKit';
import { CommonConstants } from '../common/constants/CommonConstants';
import { VideoItem } from '../viewmodel/VideoItem';
import { AppUtil, ArrayUtil, FileUtil, LogUtil, PreferencesUtil, StrUtil, ToastUtil } from '@pura/harmony-utils';
import MediaTable from '../common/util/MediaTable';
import PlaylistTable from '../common/util/PlaylistTable';
import { EventConstants } from '../common/constants/EventConstants';
import { emitter } from '@kit.BasicServicesKit';
import { taskpool } from '@kit.ArkTS';
import PermissionUtil from '../common/util/PermissionUtil'

// 批量删除
@Component
export struct DeleteComptent {
  @State isDeleteYuan: boolean = true
  @State isDeletePicture: boolean = true
  @State isDeleteLrc: boolean = true
  @State onlyRemoveFromPlaylist: boolean = false
  @State packName: string = ''
  @State isDeleting: boolean = false // 删除状态
  @State deleteProgress: number = 0 // 删除进度 (0-100)
  @State currentDeleteFile: string = '' // 当前删除的文件名
  onDeleteResult = (_result: boolean) => {
  }
  onCancel = () => {
  }
  @Prop selectedFiles: Array<VideoItem>
  @Prop isPlaylistMode: boolean = false
  @Prop playlistId: string = ''
  @StorageProp('themeColor') themeColor: string = CommonConstants.DEFAULT_THEME_COLOR;
  context = this.getUIContext().getHostContext() as common.UIAbilityContext


  async aboutToAppear() {
    this.packName = AppUtil.getBundleName()
    this.isDeleteYuan = PreferencesUtil.getBooleanSync('isDeleteYuan', true);
    this.isDeletePicture = PreferencesUtil.getBooleanSync('isDeletePicture', true);
    this.isDeleteLrc = PreferencesUtil.getBooleanSync('isDeleteLrc', true)
    if (!this.isPlaylistMode) {
      this.onlyRemoveFromPlaylist = false
    }

  }

  private hasOnlyDirectories(): boolean {
    return this.selectedFiles.length > 0 &&
      this.selectedFiles.every(item => item.type === CommonConstants.TYPE_IS_DIR)
  }

  build() {
    Column() {
      if (this.isDeleting) {
        // 删除进度界面
        Column() {
          Text('正在删除文件').fontSize(18).fontColor(Color.Red).margin({ top: 20, bottom: 15 })

          // 当前文件名显示
          if (this.currentDeleteFile) {
            Text(`正在删除: ${this.currentDeleteFile}`)
              .fontSize(14)
              .fontColor($r('app.color.text_color'))
              .maxLines(2)
              .textOverflow({ overflow: TextOverflow.Ellipsis })
              .width('90%')
              .textAlign(TextAlign.Start)
              .margin({ bottom: 15 })
          }

          // 进度条
          Column() {
            Row() {
              Text(`${Math.round(this.deleteProgress)}%`)
                .fontSize(12)
                .fontColor($r('app.color.text_color'))
              Blank()
              Text(`${Math.round(this.deleteProgress * this.selectedFiles.length / 100)}/${this.selectedFiles.length}`)
                .fontSize(12)
                .fontColor($r('app.color.text_color'))
            }
            .width('90%')
            .margin({ bottom: 8 })

            Progress({
              value: this.deleteProgress,
              total: 100,
              type: ProgressType.Linear
            })
              .width('90%')
              .height(8)
              .color(this.themeColor)
              .backgroundColor('#E0E0E0')
              .borderRadius(4)
          }
          .width('100%')
          .alignItems(HorizontalAlign.Center)
          .margin({ bottom: 20 })

          // 取消按钮
          Button('取消删除')
            .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.8 })
            .padding(15)
            .width(120)
            .onClick(() => {
              this.onCancel()
            })
            .backgroundColor($r('app.color.silvery'))
            .backgroundBlurStyle(BlurStyle.COMPONENT_THICK)
            .fontColor(Color.Black)
        }
        .backgroundColor($r('app.color.start_window_background'))
        .backgroundBlurStyle(BlurStyle.Regular)
        .padding(20)
      } else {
        // 原始删除确认界面
        Column() {
          Text('温馨提醒').fontSize(20).margin({ top: 10, bottom: 10 })
          Text('是否删除这些文件？').fontSize(16).margin({ top: 10, bottom: 10 })
          Column() {
            // 只移除歌单选项（歌单场景）
            Button({ type: ButtonType.Capsule, stateEffect: true }) {
              Row() {
                SymbolGlyph($r('sys.symbol.music_note_list'))
                  .fontSize(20)
                  .fontColor([this.themeColor])
                  .alignSelf(ItemAlign.Center)
                  .margin({ left: 15 })
                Text("只移除歌单")
                  .fontSize(16)
                  .layoutWeight(1)
                  .margin({ left: 10 })
                Toggle({ type: ToggleType.Checkbox, isOn: this.onlyRemoveFromPlaylist })
                  .onChange((isOn: boolean) => {
                    this.onlyRemoveFromPlaylist = isOn;
                    if (isOn) {
                      this.isDeleteYuan = false
                      this.isDeletePicture = false
                      this.isDeleteLrc = false
                    }
                  })
                  .margin({ right: 28 })
                  .selectedColor(this.themeColor)

              }
            }
            .backgroundColor(Color.Transparent)
            .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.6 })
            .onClick(() => {
              this.onlyRemoveFromPlaylist = !this.onlyRemoveFromPlaylist
              if (this.onlyRemoveFromPlaylist) {
                this.isDeleteYuan = false
                this.isDeletePicture = false
                this.isDeleteLrc = false
              }
            })
            .width('100%')
            .padding(10)
            .margin({ left: 18 })
            .visibility(this.isPlaylistMode ? Visibility.Visible : Visibility.None)

            // 删除源文件选项
            Button({ type: ButtonType.Capsule, stateEffect: true }) {
              Row() {
                SymbolGlyph($r('sys.symbol.doc_text'))
                  .fontSize(20)
                  .fontColor([this.themeColor])
                  .alignSelf(ItemAlign.Center)
                  .margin({ left: 15 })
                Text("删除源文件")
                  .fontSize(16)
                  .layoutWeight(1)
                  .margin({ left: 10 })
                Toggle({ type: ToggleType.Checkbox, isOn: this.isDeleteYuan })
                  .onChange((isOn: boolean) => {
                    this.isDeleteYuan = isOn;
                    PreferencesUtil.put('isDeleteYuan', this.isDeleteYuan)
                  })
                  .margin({ right: 28 })
                  .selectedColor(this.themeColor)

              }
            }
            .backgroundColor(Color.Transparent)
            .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.6 })
            .onClick(() => {
              this.isDeleteYuan = !this.isDeleteYuan
            })
            .width('100%')
            .padding(10)
            .margin({ left: 18 })
            .visibility(this.onlyRemoveFromPlaylist ? Visibility.None : Visibility.Visible)

            // 删除封面选项
            Button({ type: ButtonType.Capsule, stateEffect: true }) {
              Row() {
                SymbolGlyph($r('sys.symbol.picture'))
                  .fontSize(20)
                  .fontColor([this.themeColor])
                  .alignSelf(ItemAlign.Center)
                  .margin({ left: 15 })
                Text("删除封面文件")
                  .fontSize(16)
                  .layoutWeight(1)
                  .margin({ left: 10 })
                Toggle({ type: ToggleType.Checkbox, isOn: this.isDeletePicture })
                  .onChange((isOn: boolean) => {
                    this.isDeletePicture = isOn;
                    PreferencesUtil.put('isDeletePicture', this.isDeletePicture)
                  })
                  .margin({ right: 28 })
                  .selectedColor(this.themeColor)
              }
            }
            .backgroundColor(Color.Transparent)
            .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.6 })
            .onClick(() => {
              this.isDeletePicture = !this.isDeletePicture
            })
            .width('100%')
            .padding(10)
            .margin({ left: 18 })
            .visibility(this.onlyRemoveFromPlaylist ? Visibility.None : Visibility.Visible)


            // 删除歌词选项
            Button({ type: ButtonType.Capsule, stateEffect: true }) {
              Row() {
                SymbolGlyph($r('sys.symbol.input_mode'))
                  .fontSize(20)
                  .fontColor([this.themeColor])
                  .alignSelf(ItemAlign.Center)
                  .margin({ left: 15 })

                Text("删除歌词文件")
                  .fontSize(16)
                  .layoutWeight(1)
                  .margin({ left: 10 })
                Toggle({ type: ToggleType.Checkbox, isOn: this.isDeleteLrc })
                  .onChange((isOn: boolean) => {
                    this.isDeleteLrc = isOn;
                    PreferencesUtil.put('isDeleteLrc', this.isDeleteLrc)
                  })
                  .margin({ right: 28 })
                  .selectedColor(this.themeColor)
              }
            }
            .backgroundColor(Color.Transparent)
            .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.6 })
            .onClick(() => {
              this.isDeleteLrc = !this.isDeleteLrc
            })
            .width('100%')
            .padding(10)
            .margin({ left: 18, bottom: 10 })
            .visibility(this.onlyRemoveFromPlaylist ? Visibility.None : Visibility.Visible)

          }
          .visibility(this.hasOnlyDirectories() ? Visibility.None : Visibility.Visible)

          Flex({ justifyContent: FlexAlign.SpaceAround }) {
            Button($r('app.string.cancel'))
              .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.8 })
              .padding(15)
              .width(120)
              .onClick(() => {
                this.onCancel()
              })
              .backgroundColor($r('app.color.silvery'))
              .backgroundBlurStyle(BlurStyle.COMPONENT_THICK)
              .fontColor(Color.Black)
            Button($r('app.string.sure'))
              .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.8 })
              .padding(15)
              .width(120)
              .onClick(() => {
                this.doDeleteTask()
              })
              .backgroundColor($r('app.color.silvery'))
              .backgroundBlurStyle(BlurStyle.COMPONENT_THICK)
              .fontColor(Color.Red)
          }.margin({ bottom: 10 })
        }
        .backgroundColor($r('app.color.start_window_background'))
        .backgroundBlurStyle(BlurStyle.Regular)
      }
    }
  }


  doDeleteTask(){
    if (this.onlyRemoveFromPlaylist && StrUtil.isEmpty(this.playlistId)) {
      ToastUtil.showToast('当前歌单信息无效')
      return
    }

    // 设置删除状态
    this.isDeleting = true;
    this.deleteProgress = 0;
    this.currentDeleteFile = '';

    const totalFiles = this.selectedFiles.length;
    let currentFileIndex = 0;

    // 创建进度监控定时器
    let progressTimer: number = setInterval(() => {
      // 基于时间模拟进度
      if (currentFileIndex < totalFiles) {
        this.deleteProgress = (currentFileIndex / totalFiles) * 95; // 最高到95%
        this.currentDeleteFile = this.selectedFiles[currentFileIndex]?.name || '';
        currentFileIndex++;
      }

      if (this.deleteProgress >= 95) {
        clearInterval(progressTimer);
      }
    }, 300); // 每300ms更新一次，模拟删除进度

    const task = this.onlyRemoveFromPlaylist ?
      new taskpool.Task(
        removeSongsFromPlaylistOnly,
        JSON.stringify(this.selectedFiles),
        this.context,
        this.playlistId
      ) :
      new taskpool.Task(
        deleteMultipleFilesWithProgress,
        JSON.stringify(this.selectedFiles),
        this.isDeleteYuan, this.isDeletePicture, this.isDeleteLrc, this.context, this.packName
      );
    taskpool.execute(task, taskpool.Priority.HIGH).then((result) => {
      clearInterval(progressTimer);
      this.deleteProgress = 100;
      this.currentDeleteFile = '删除完成';

      setTimeout(() => {
        if(result){
          this.onDeleteResult(true)
        }else {
          this.onDeleteResult(false)
        }
      },500)
    }).catch((error:Error) => {
      clearInterval(progressTimer);
      console.error('heanup DeleteComptent: delete failed:', (error as Error).message);
      this.isDeleting = false;
    });
  }


}


// 仅从当前歌单移除歌曲
@Concurrent
async function removeSongsFromPlaylistOnly(
  selectedFilesStr:string,
  context:Context,
  playlistId:string
) {
  const selectedFiles: VideoItem[] = JSON.parse(selectedFilesStr)
  if (!ArrayUtil.isNotEmpty(selectedFiles)) {
    return true
  }
  if (StrUtil.isEmpty(playlistId)) {
    LogUtil.error('heanup DeleteComptent', 'removeSongsFromPlaylistOnly: playlistId 为空')
    return false
  }

  const playlistTable: PlaylistTable = new PlaylistTable(context)
  let hasPlaylistChanges = false
  let hasError = false

  for (let i = 0; i < selectedFiles.length; i++) {
    const item = selectedFiles[i]
    if (!item.filePath) {
      continue
    }
    try {
      const removed = await playlistTable.removeSongFromPlaylist(playlistId, item.filePath)
      if (removed) {
        hasPlaylistChanges = true
      } else {
        hasError = true
      }
    } catch (error) {
      hasError = true
      LogUtil.error('heanup DeleteComptent', `removeSongsFromPlaylistOnly error: ${(error as Error).message}`)
    }
    await new Promise<void>(resolve => setTimeout(resolve, 120))
  }

  if (hasPlaylistChanges) {
    const eventRefresh: emitter.InnerEvent = { eventId: EventConstants.EVENT_PLAYLIST_REFRESH }
    emitter.emit(eventRefresh, {})
    emitter.emit({ eventId: EventConstants.EVENT_PLAYLIST_REFRESH_SORT }, {})
  }
  return !hasError
}


//多选删除文件（带进度显示的新版本）
@Concurrent
async function deleteMultipleFilesWithProgress(
  selectedFilesStr:string,
  isDeleteYuan:boolean,
  isDeletePicture:boolean,
  isDeleteLrc:boolean,
  context:Context,
  packName:string
) {

  const selectedFiles: VideoItem[] = JSON.parse(selectedFilesStr)
  if (ArrayUtil.isNotEmpty(selectedFiles)) {
    const table: MediaTable = new MediaTable(context)
    const playlistTable: PlaylistTable = new PlaylistTable(context)

    // 初始化数据库
    await new Promise<void>((resolve, reject) => {
      table.getRdbStore(context,  (err:Error) => {
        err ? reject(err) : resolve();
      });
    });

    let hasPlaylistChanges = false; // 标记是否有歌单变化
    const totalFiles = selectedFiles.length;

    for (let i = 0; i < selectedFiles.length; i++) {
      const item = selectedFiles[i];
      console.info('heanup DeleteComptent: deleting file ' + (i + 1) + '/' + totalFiles + ': ' + item.name);

      if (item.type === CommonConstants.TYPE_IS_DIR) {
        // 删除目录
        await new Promise<void>((resolve) => {
          table.deleteDataForParentPath(item.filePath, async () => {
            try {
              await FileUtil.rmdir(item.filePath);
              console.info('heanup DeleteComptent: directory deleted: ' + item.filePath);
            } catch (error) {
              console.error('heanup DeleteComptent: directory delete error: ' + (error as Error).message);
            }
            resolve();
          });
        });
      } else {
        // 删除文件
        await new Promise<void>((resolve) => {
          table.deleteData(item, async () => {
            try {
              // 删除源文件
              if(isDeleteYuan && item.filePath.toLowerCase().includes(packName)){
                await FileUtil.unlink(item.filePath);
                console.info('heanup DeleteComptent: source file deleted: ' + item.filePath);
              }

              // 删除封面文件
              if (isDeletePicture && item.pixelMapPath) {
                const picPath = FileUtil.getFilePath(item.pixelMapPath);
                if (FileUtil.accessSync(picPath)) {
                  await FileUtil.unlink(picPath);
                  console.info('heanup DeleteComptent: cover file deleted: ' + picPath);
                }
              }

              // 删除歌词文件
              if(isDeleteLrc) {
                const lyricPath = item.filePath?.replace(/\.[^/.]+$/, ".lrc");
                if (lyricPath && item.filePath.toLowerCase().includes(packName) && FileUtil.accessSync(lyricPath)) {
                  await FileUtil.unlink(lyricPath);
                  console.info('heanup DeleteComptent: lyric file deleted: ' + lyricPath);
                }
              }
            } catch (error) {
              console.error('heanup DeleteComptent: file delete error: ' + (error as Error).message);
            }
            resolve();
          });
        });

        // 从歌单中移除歌曲
        LogUtil.info('heanup DeleteComptent', `准备从歌单中移除歌曲: ${item.name}, filePath: ${item.filePath}`);
        if (item.filePath) {
          try {
            const affectedPlaylists = await playlistTable.removeSongFromAllPlaylists(item.filePath);
            LogUtil.info('heanup DeleteComptent', `removeSongFromAllPlaylists 返回了 ${affectedPlaylists.length} 个受影响的歌单`);
            if (affectedPlaylists.length > 0) {
              hasPlaylistChanges = true;
              LogUtil.info('heanup DeleteComptent', `歌曲已从 ${affectedPlaylists.length} 个歌单中移除: ${item.name}`);
            } else {
              LogUtil.info('heanup DeleteComptent', `歌曲不在任何歌单中: ${item.name}`);
            }
          } catch (error) {
            LogUtil.error('heanup DeleteComptent', `从歌单移除歌曲失败: ${(error as Error).message}`);
          }
        } else {
          LogUtil.warn('heanup DeleteComptent', `歌曲 ${item.name} 的 filePath 为空`);
        }
      }

      // 短暂延迟，让用户能看到进度变化
      await new Promise<void>(resolve => setTimeout(resolve, 200));
    }

    // 如果有歌单变化，发送刷新事件
    if (hasPlaylistChanges) {
      const eventRefresh: emitter.InnerEvent = { eventId: EventConstants.EVENT_PLAYLIST_REFRESH };
      emitter.emit(eventRefresh, {});
      LogUtil.info('heanup DeleteComptent', '已发送歌单刷新事件，更新歌单数量');
    }
  }
  return true
}

// 保留原始删除函数作为备用
@Concurrent
async function deleteMultipleFiles(
  selectedFilesStr:string,
  isDeleteYuan:boolean,
  isDeletePicture:boolean,
  isDeleteLrc:boolean,
  context:Context,
  packName:string
) {

  const selectedFiles: VideoItem[] = JSON.parse(selectedFilesStr)
  if (ArrayUtil.isNotEmpty(selectedFiles)) {
    const table: MediaTable = new MediaTable(context)
    const playlistTable: PlaylistTable = new PlaylistTable(context)

    // 初始化数据库
    await new Promise<void>((resolve, reject) => {
      table.getRdbStore(context,  (err:Error) => {
        err ? reject(err) : resolve();
      });
    });

    let hasPlaylistChanges = false; // 标记是否有歌单变化

    for (const item of selectedFiles) {
      console.info('onecold delete filePath = ' + item.filePath);
      if (item.type === CommonConstants.TYPE_IS_DIR) {
        table.deleteDataForParentPath(item.filePath, () => {
          FileUtil.rmdir(item.filePath).then(() => {
            return true
          }).catch((error:Error) => {
            console.error((error as Error).message);
            return false
          });
        });


      } else {

        table.deleteData(item, async () => {
          if(isDeleteYuan){
            if(item.filePath.toLowerCase().includes(packName)){
              await FileUtil.unlink(item.filePath)
            }

          }
          console.info(`onecold 封面文件=: ${item.pixelMapPath}`);
          if (isDeletePicture && item.pixelMapPath) {
            const picPath = FileUtil.getFilePath(item.pixelMapPath)//获取图
            if (FileUtil.accessSync(picPath)) {
              await FileUtil.unlink(picPath);
              console.info(`onecold 封面文件已删除: ${picPath}`);
            }
          }
          const lyricPath = item.filePath?.replace(/\.[^/.]+$/, ".lrc");
          console.info(`onecold 歌词文件=: ${lyricPath}`);
          if(isDeleteLrc) {

            if (lyricPath&&item.filePath.toLowerCase().includes(packName) && FileUtil.accessSync(lyricPath)) {
              await FileUtil.unlink(lyricPath);
              console.info( `onecold 歌词文件已删除: ${lyricPath}`);
            }

          }

          // this.onDeleteResult(true,item)


        });
        // 先从所有歌单中移除这首歌（如果存在的话）
        LogUtil.info('heanup DeleteComptent', `准备从歌单中移除歌曲: ${item.name}, filePath: ${item.filePath}`);
        if (item.filePath) {
          try {
            const affectedPlaylists = await playlistTable.removeSongFromAllPlaylists(item.filePath);
            LogUtil.info('heanup DeleteComptent', `removeSongFromAllPlaylists 返回了 ${affectedPlaylists.length} 个受影响的歌单`);
            if (affectedPlaylists.length > 0) {
              hasPlaylistChanges = true;
              LogUtil.info('heanup DeleteComptent', `歌曲已从 ${affectedPlaylists.length} 个歌单中移除: ${item.name}`);
            } else {
              LogUtil.info('heanup DeleteComptent', `歌曲不在任何歌单中: ${item.name}`);
            }
          } catch (error) {
            LogUtil.error('heanup DeleteComptent', `从歌单移除歌曲失败: ${(error as Error).message}`);
          }
        } else {
          LogUtil.warn('heanup DeleteComptent', `歌曲 ${item.name} 的 filePath 为空`);
        }




      }
    }

    // 如果有歌单变化，发送刷新事件
    if (hasPlaylistChanges) {
      const eventRefresh: emitter.InnerEvent = { eventId: EventConstants.EVENT_PLAYLIST_REFRESH };
      emitter.emit(eventRefresh, {});
      LogUtil.info('heanup DeleteComptent', '已发送歌单刷新事件，更新歌单数量');
    }


  }
  return true
}