import { 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 { promptAction, SymbolGlyphModifier,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';
import { PreferencesUtil, StrUtil } from '@pura/harmony-utils';
import { ButtonFancyModifier,
  MenuModifier,
  ShadowModifier, SymbolGlyphFancyModifier } from '../common/util/AttributeModifierUtil';
import { getRemoteDriveAccountLabel, getRemoteDriveDisplayLabel, getRemoteDrivePlaylistPrefix } from '../common/util/RemoteDriveLabel';
import { RemoteDriveType } from '../common/enums/RemoteDriveType';
import { Utility } from '../common/util/Utility';

/**
 * 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';

// WebDAV歌曲数据全局内存存储
let globalWebdavVideoItems: VideoItem[] = [];
let globalWebdavCurrentPlayIndex: number = 0;

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

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

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 {
  @StorageProp('bottomSafeHeight') bottomSafeHeight: number = 0;
  searchController: SearchController = new SearchController()
  @StorageProp('animationState') animationState: AnimationStatus= AnimationStatus.Running
  @State isNoJumpToHome: boolean = false //网盘播放不跳转首页
  @State isSearchMode: boolean = false
  @StorageLink('currentSong') currentSong: VideoItem | undefined = undefined;
  @StorageProp('topSafeHeight') topSafeHeight: number = 0;
  @State webdavManager: RemoteDriveManager = RemoteDriveManager.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
  @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

  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>, noSort?: boolean){
    if (!noSort) {
      this.sortType = PreferencesUtil.getNumberSync('webDavSortType', 0)
      this.doSortType(this.sortType)
    }
    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 isNavAccount = this.selectedAccount?.webType === RemoteDriveType.Navidrome;
      if (isNavAccount) {
        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 = [];
    }
  }

  // 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 {
    this.isShowFileName = PreferencesUtil.getBooleanSync('isShowFileName', false)
    this.isLongNameRoLL = PreferencesUtil.getBooleanSync('isLongNameRoLL', true)
    this.sortType = PreferencesUtil.getNumberSync('webDavSortType', 0)
    this.isNoJumpToHome = PreferencesUtil.getBooleanSync('isNoJumpToHome', true)
    // 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 RemoteDriveManagerStates.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 RemoteDriveManagerStates.LoadFilesInfoFailed:
        this.isLoading = false;
        this.getUIContext().getPromptAction().showToast({ message: '加载失败' });
        break;
      case RemoteDriveManagerStates.InsertAccountSucceed:
      case RemoteDriveManagerStates.EditAccountSucceed:
      case RemoteDriveManagerStates.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
      }

      // 直接通过事件传递videoItems数据，不使用GlobalContext
      const eventPlaylistPlay: emitter.InnerEvent = { eventId: EventConstants.EVENT_PLAYLIST_PLAY };

      const playlistData: PlaylistEventData = {
        playlistId: 'webdav-playlist', // 使用特殊的ID标识网盘播放列表
        playlistName: `${getRemoteDriveDisplayLabel(this.selectedAccount?.webType)} - ${this.selectedAccount?.name || '未知账户'}`,
        songCount: this.songs.length,
        startIndex: index,
        songFilePaths: songFilePaths
      };

      // 保存videoItems到全局内存
      globalWebdavVideoItems = videoItems;
      globalWebdavCurrentPlayIndex = index;

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

      // 发送播放请求事件，只传递索引信息
      emitter.emit(eventPlaylistPlay, { data: playlistData });

      Logger.info(TAG, `heanup 发送WebDAV播放事件，只传递索引: ${index}`);

      if(!this.isNoJumpToHome){
        // 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' });
    }
  }

  /**
   * 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.webdavManager.currentPath || '/';
      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.queryAllPlaylists()).find(p => p.name === 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 playlists = await playlistTable.queryAllPlaylists();
      const target = playlists.reverse().find(p => p.name === playlistName); // 取最近创建的同名歌单
      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 navigateToBreadcrumb(breadcrumbIndex: number): void {
    try {
      this.isLoading = true;
      this.webdavManager.navigateToBreadcrumb(breadcrumbIndex).then((path: string) => {
        this.webdavManager.enterFolderFromPath(path)
        this.breadcrumbs = this.webdavManager.getBreadcrumbs();
        console.info('onecold this.breadcrumbs = ' + JSON.stringify(this.breadcrumbs))
        console.info('onecold this.webdavManager.currentPath = ' + this.webdavManager.currentPath)
      })
        .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;
    }
  }

  @Builder
  SortMenuBuilder() {
    Menu() {

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

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

        })
      MenuItem({
        symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.clock')),
        content:'按大小升序'
      })
        .onClick(async () => {
          this.doSortType(4)
          PreferencesUtil.put("webDavSortType", 4)
        })

      MenuItem({
        symbolStartIcon: new SymbolGlyphModifier($r('sys.symbol.timer')),
        content: '按大小降序'
      })
        .onClick(async () => {
          this.doSortType(5)
          PreferencesUtil.put("webDavSortType", 5)

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


  doSortType(index: number) {
    // 对歌曲列表进行排序
    switch (index) {
      case 0:
        Utility.doSortListAscending(this.songs,this.isShowFileName)
        this.visibleFoldersState.sort((a, b) => {
          return a.fileName.localeCompare(b.fileName);
        });
        break;
      case 1:
        Utility.doSortListDescending(this.songs,this.isShowFileName)

        this.visibleFoldersState.sort((a, b) => {
          return b.fileName.localeCompare(a.fileName);
        });
        break;
      case 2:
        this.songs.sort((a, b) => {
          return a.cTime.localeCompare(b.cTime);
        });
        this.visibleFoldersState.sort((a, b) => {
          return a.time-b.time;
        });
        break;
      case 3:
        this.songs.sort((a, b) => {
          return b.cTime.localeCompare(a.cTime);
        });
        this.visibleFoldersState.sort((a, b) => {
          return b.time-a.time;
        });
        break;
      case 4:
        this.songs.sort((a, b) => {
          return a.videoSize - b.videoSize;
        });
        break;
      case 5:
        this.songs.sort((a, b) => {
          return b.videoSize - a.videoSize;
        });
        break;
    }

    
    this.updateListData(this.songs,true)
  }


  @Builder
  topTitleBar(){
    Column() {
      Row({ space: 15 }) {
        if (!this.isSearchMode ) {
          //左侧滑动按钮
          Button({ type: ButtonType.Circle, stateEffect: true }) {
            SymbolGlyph($r('sys.symbol.sort'))
              .attributeModifier(new SymbolGlyphFancyModifier(25, '', ''))
          }
          .attributeModifier(new ButtonFancyModifier(40, 40))
          .clickEffect({ level: ClickEffectLevel.MIDDLE,scale:0.6 })
          .animation({ duration: 300, curve: Curve.Ease })
          .onClick(() => {
            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
            })

          })
          .attributeModifier(new ShadowModifier())
          .zIndex(0)

          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 })
        }else{

          //左侧搜索返回按钮
          Button({ type: ButtonType.Circle, stateEffect: true }) {
            SymbolGlyph($r('sys.symbol.chevron_left'))
              .attributeModifier(new SymbolGlyphFancyModifier(24, '', ''))
          }
          .attributeModifier(new ButtonFancyModifier(40, 40))
          .clickEffect({ level: ClickEffectLevel.MIDDLE,scale:0.6 })
          .animation({ duration: 300, curve: Curve.Ease })
          .onClick(() => {
            this.isSearchMode = false
            this.onSearchInput('')
          })
          .attributeModifier(new ShadowModifier())
          .zIndex(0)

        }

        //搜索框
        Search({ controller: this.searchController,value: this.searchText, placeholder: '搜索标题、艺术家...' })
          .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.onSearchInput(this.searchText);

          })
          .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) {
          Button({ type: ButtonType.Circle, stateEffect: true }) {
            SymbolGlyph($r('sys.symbol.magnifyingglass'))
              .attributeModifier(new SymbolGlyphFancyModifier(25, '', ''))
          }
          .attributeModifier(new ButtonFancyModifier(40, 40))
          .animation({ duration: 300, curve: Curve.Ease })
          .clickEffect({ level: ClickEffectLevel.MIDDLE,scale:0.6 })
          .attributeModifier(new ShadowModifier())
          .zIndex(0)
          .onClick(()=>{
            this.filteredFolderList = [...this.visibleFoldersState]; // 显示所有文件夹
            this.isSearchMode = true
          })
          //排序按钮
          Button({ type: ButtonType.Circle, stateEffect: true }) {
            SymbolGlyph($r('sys.symbol.list_number'))
              .attributeModifier(new SymbolGlyphFancyModifier(25, '', ''))
          }
          .attributeModifier(new ButtonFancyModifier(40, 40))
          .animation({ duration: 300, curve: Curve.Ease })
          .clickEffect({ level: ClickEffectLevel.MIDDLE,scale:0.6 })
          .bindMenu(this.SortMenuBuilder)
          .attributeModifier(new ShadowModifier())
          .zIndex(0)
          //添加按钮
          Button({ type: ButtonType.Circle, stateEffect: true }) {
            SymbolGlyph($r('sys.symbol.plus'))
              .attributeModifier(new SymbolGlyphFancyModifier(25, '', ''))
          }
          .attributeModifier(new ButtonFancyModifier(40, 40))
          .animation({ duration: 300, curve: Curve.Ease })
          .clickEffect({ level: ClickEffectLevel.MIDDLE,scale:0.6 })
          .onClick(() => {
            this.createPlaylistFromCurrentWebDav();
          })
          .attributeModifier(new ShadowModifier())
          .zIndex(0)


        }


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

  // 实时搜索逻辑（带防抖）
// 实时搜索逻辑（带防抖）
  private onSearchInput(value: string) {
    this.searchText = value.trim();
    let mSearchList: Array<VideoItem> = []
    mSearchList = this.songs

    // 新增条件判断：空输入时显示所有数据
    if (this.searchText === '') {
      this.filteredList = [...mSearchList]; // 创建新数组以触发状态更新
      this.filteredFolderList = [...this.visibleFoldersState]; // 显示所有文件夹
    } else {
      this.filteredList = mSearchList.filter((item: VideoItem) => {
        //支持模糊匹配和艺术家 专辑匹配
        const regex = new RegExp(this.searchText.toLowerCase().replace(/\s+/g,  '.*'), 'i');
        return regex.test(item.name.toLowerCase())||
        regex.test(item.fileName?.toLowerCase()  ?? "") ||
        regex.test(item.artist?.toLowerCase()  ?? "") ||
        regex.test(item.album?.toLowerCase()  ?? "")
      });
      
      // 对文件夹进行过滤
      this.filteredFolderList = this.visibleFoldersState.filter((folder: FileInfo) => {
        const regex = new RegExp(this.searchText.toLowerCase().replace(/\s+/g, '.*'), 'i');
        return regex.test(folder.fileName?.toLowerCase() ?? "") ||
               regex.test(decodeUrlEncodedString(folder.fileName?.replace('/', '') ?? "").toLowerCase());
      });
    }

    this.updateListData(this.filteredList);
  }

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

    }
    .alignContent(Alignment.Top)
    .width('100%')
    .height('100%')
  }

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

      // 面包屑导航
      if (this.webdavManager.currentPath !== '') {
        Row({ space: 8 }) {
          Button({ type: ButtonType.Circle }) {
            Image(this.webdavManager.canGoBack()?$r('app.media.back'):this.selectedAccount.coverPath)
              .width(15)
              .height(15)
              .borderRadius(10)
              .alt($r('app.media.cloudDisk'))
              .fillColor(Color.White)
          }
          .width(20)
          .height(20)
          .margin({left:5})
          .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 })
      }

    }
    .width('100%')
    .padding({ left: 12, right: 12,top: 10,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%')
    .padding({top: this.topSafeHeight+50})
    .layoutWeight(1)
  }

  // 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, bottom: 20, left: 20, right: 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.isSearchMode ? this.filteredFolderList : 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 })
          }, (folder: FileInfo) =>  folder.name+folder.fileName)

          // 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 })
          }, (item: VideoItem) =>  item.filePath)
        }

        .contentStartOffset(this.topSafeHeight + 80)
        .contentEndOffset(this.bottomSafeHeight)
        .layoutWeight(1)
        .margin({ top: 4 })
      } else if (!this.isLoading) {
        Column() {
          Text('暂无内容')
            .fontSize(14)
            .fontColor($r('app.color.index_tab_font_color'))
            .opacity(0.6)
          Text('点击"左侧菜单"网盘加载')
            .fontSize(12)
            .fontColor($r('app.color.index_tab_font_color'))
            .opacity(0.4)
            .margin({ top: 8 })
        }
        .justifyContent(FlexAlign.Center)
        .layoutWeight(1)
      }
    }
    .layoutWeight(1)

  }

  // 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(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(){
            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(decodeUrlEncodedString(song.size||""))
              .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 })
            Text(song.cTime)
              .fontSize(13)
              .fontColor(this.currentSong?.filePath==song.filePath?this.themeColor:
                $r('app.color.index_tab_font_color'))
              .opacity(0.6)
              .maxLines(1)
              .padding({left: 10})
              .visibility(StrUtil.isNotEmpty(song.artist)?Visibility.None:Visibility.Visible)
              .textOverflow({ overflow: TextOverflow.Ellipsis })
          }
          .width('90%')
        }
        .alignItems(HorizontalAlign.Start)
        .layoutWeight(1)
        .padding({ right: 20 })

        Column() {
          //多选按钮的Checkbox 先注释掉
          // Checkbox({ name: 'checkbox' + index })
          //   .select(this.selectedFiles.some(x => x.filePath === item.filePath))
          //   .selectedColor(this.themeColor)
          //   .shape(CheckBoxShape.CIRCLE)
          //   .opacity(this.isMultiSelect ? 1 : 0)
          //   .animation({
          //     duration: 666,
          //     curve: 'Smooth' // 可选动画曲线
          //   })
          //   .visibility(this.isMultiSelect ? Visibility.Visible : Visibility.None)
          //   .onChange((checked: boolean) => this.handleFileSelection(item, checked))
          //   .margin({ left: 20, top: 8, bottom: 8,right:18 })
          //   .width(22)
          //   .height(22)


          ImageAnimator()
            .images(CommonConstants.IMAGE_FRAME_INFO)// 动画数组
            .duration(1000)// 持续
            .state(this.animationState)// 动画状态
            .fillMode(FillMode.Forwards)
            .width(18)
            .margin({ right: 12, top: 8, bottom: 8 })
            .visibility(this.currentSong?.filePath==song.filePath ?  Visibility.Visible :
              Visibility.None)
            .height(18)
            .iterations(-1) // 播放次数
        }
      }
    }
    .width('100%')
    .padding(12)
    .clickEffect({ level: ClickEffectLevel.MIDDLE, scale: 0.8 })
    .backgroundColor(Color.Transparent)
    .onClick(() => {
      this.playSong(song, index);
    })
  }
}