# All files / src/components/admin FolderExplorer.tsx

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     'use client';

    import { useState, useEffect } from 'react';
    import { useQuery } from '@tanstack/react-query';
    import { useTranslation } from 'react-i18next';
    import useLoadNamespace from '@/hooks/useLoadNamespace';
    import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
    import { Button } from '@/components/ui/button';
    import { Badge } from '@/components/ui/badge';
    import { Label } from '@/components/ui/label';
    import { Alert, AlertDescription } from '@/components/ui/alert';

    import {
      Folder,
      FolderOpen,
      ArrowUp,
      RefreshCw,
      Loader2,
      CheckCircle,
      AlertCircle,
      Home,
      HardDrive
    } from 'lucide-react';
    import { mediaScannerService, type FolderItem } from '@/services/mediaScanner';

    interface FolderExplorerProps {
      selectedPath: string;
      onPathSelect: (path: string) => void;
      className?: string;
    }

    export default function FolderExplorer({ selectedPath, onPathSelect, className }: FolderExplorerProps) {
      useLoadNamespace('admin/mediaScanner');
      const { t } = useTranslation('admin/mediaScanner');
      const [currentPath, setCurrentPath] = useState<string>('/');

      // Fetch folders for current path
      const {
        data: folders,
        isLoading: loadingFolders,
        error: foldersError,
        refetch: refetchFolders
      } = useQuery({
        queryKey: ['folders', currentPath],
        queryFn: () => mediaScannerService.listFolders(currentPath),
        staleTime: 30000, // Cache for 30 seconds
      });

      // Update current path when selected path changes externally
      useEffect(() => {
        if (selectedPath && selectedPath !== currentPath) {
          setCurrentPath(selectedPath);
        }
      }, [selectedPath]);

      const handleFolderSelect = (folder: FolderItem) => {
        if (folder.isDirectory) {
          setCurrentPath(folder.path);
        }
      };

      const handleSelectCurrentFolder = () => {
        onPathSelect(currentPath);
      };

      const handleGoUp = () => {
        const pathParts = currentPath.split('/').filter(Boolean);
        if (pathParts.length > 0) {
          pathParts.pop();
          const parentPath = '/' + pathParts.join('/');
          setCurrentPath(parentPath === '/' ? '/' : parentPath);
        }
      };

      const handleGoToRoot = () => {
        setCurrentPath('/');
      };

      const formatFileSize = (bytes?: number): string => {
        if (!bytes) return '';
        const sizes = ['B', 'KB', 'MB', 'GB', 'TB'];
        const i = Math.floor(Math.log(bytes) / Math.log(1024));
        return `${(bytes / Math.pow(1024, i)).toFixed(1)} ${sizes[i]}`;
      };

      const formatLastModified = (dateString?: string): string => {
        if (!dateString) return '';
        try {
          const normalized = dateString.includes('T')
            ? dateString
            : dateString.replace(' ', 'T');
          const date = new Date(normalized);
          if (Number.isNaN(date.getTime())) {
            return '';
          }
          return date.toLocaleDateString() + ' ' + date.toLocaleTimeString();
        } catch {
          return '';
        }
      };

      const pathParts = currentPath.split('/').filter(Boolean);

      return (
        <Card className={className}>
          <CardHeader>
            <CardTitle className="flex items-center gap-2">
              <Folder className="h-5 w-5" />
              {t('mediaScanner.folderExplorer.title')}
            </CardTitle>
            <CardDescription>
              {t('mediaScanner.folderExplorer.description')}
            </CardDescription>
          </CardHeader>
          <CardContent className="space-y-4">
            {/* Navigation Bar */}
            <div className="flex items-center gap-2 flex-wrap">
              <Button
                variant="outline"
                size="sm"
                onClick={handleGoToRoot}
                disabled={currentPath === '/'}
              >
                <Home className="h-4 w-4" />
              </Button>

              <Button
                variant="outline"
                size="sm"
                onClick={handleGoUp}
                disabled={currentPath === '/'}
              >
                <ArrowUp className="h-4 w-4" />
                {t('mediaScanner.folderExplorer.goUp')}
              </Button>

              <Button
                variant="outline"
                size="sm"
                onClick={() => refetchFolders()}
                disabled={loadingFolders}
              >
                <RefreshCw className={`h-4 w-4 ${loadingFolders ? 'animate-spin' : ''}`} />
                {t('mediaScanner.folderExplorer.refresh')}
              </Button>
            </div>

            {/* Breadcrumb Path */}
            <div className="flex items-center gap-1 text-sm">
              <Label>{t('mediaScanner.folderExplorer.currentPath')}:</Label>
              <div className="flex items-center gap-1 font-mono bg-muted px-2 py-1 rounded">
                <HardDrive className="h-3 w-3" />
                <span>/</span>
                {pathParts.map((part, index) => (
                  <span key={index} className="flex items-center gap-1">
                    <span
                      className="cursor-pointer hover:text-primary"
                      onClick={() => {
                        const newPath = '/' + pathParts.slice(0, index + 1).join('/');
                        setCurrentPath(newPath);
                      }}
                    >
                      {part}
                    </span>
                    {index < pathParts.length - 1 && <span>/</span>}
                  </span>
                ))}
              </div>
            </div>

            {/* Folder List */}
            <div className="border rounded-lg">
              <div className="h-64 overflow-y-auto">
                {loadingFolders ? (
                  <div className="flex items-center justify-center py-8">
                    <Loader2 className="h-6 w-6 animate-spin" />
                    <span className="ml-2">{t('mediaScanner.folderExplorer.loading')}</span>
                  </div>
                ) : foldersError ? (
                  <div className="p-4">
                    <Alert variant="destructive">
                      <AlertCircle className="h-4 w-4" />
                      <AlertDescription>
                        {t('mediaScanner.folderExplorer.error')}
                      </AlertDescription>
                    </Alert>
                  </div>
                ) : folders?.success && folders.data.length > 0 ? (
                  <div className="p-2">
                    {folders.data
                      .filter(f => f.isDirectory)
                      .sort((a, b) => a.name.localeCompare(b.name))
                      .map((folder) => (
                        <div
                          key={folder.path}
                          className="flex items-center gap-3 p-2 rounded hover:bg-muted cursor-pointer group"
                          onClick={() => handleFolderSelect(folder)}
                        >
                          <FolderOpen className="h-4 w-4 text-blue-500 flex-shrink-0" />
                          <div className="flex-1 min-w-0">
                            <div className="font-medium truncate">{folder.name}</div>
                            {folder.lastModified && (
                              <div className="text-xs text-muted-foreground">
                                {formatLastModified(folder.lastModified)}
                              </div>
                            )}
                          </div>
                          {folder.size && (
                            <Badge variant="outline" className="text-xs">
                              {formatFileSize(folder.size)}
                            </Badge>
                          )}
                        </div>
                      ))}
                  </div>
                ) : (
                  <div className="flex items-center justify-center py-8 text-muted-foreground">
                    <Folder className="h-8 w-8 mb-2" />
                    <div className="text-center">
                      <div>{t('mediaScanner.folderExplorer.noFolders')}</div>
                    </div>
                  </div>
                )}
              </div>
            </div>

            {/* Select Current Folder */}
            <div className="space-y-2">
              <Button
                onClick={handleSelectCurrentFolder}
                disabled={currentPath === '/'}
                className="w-full"
                variant={selectedPath === currentPath ? "default" : "outline"}
              >
                <CheckCircle className="h-4 w-4 mr-2" />
                {t('mediaScanner.folderExplorer.selectFolder')}: {currentPath}
              </Button>

              {selectedPath && selectedPath !== '/' && selectedPath !== currentPath && (
                <Alert>
                  <CheckCircle className="h-4 w-4" />
                  <AlertDescription>
                    {t('mediaScanner.folderExplorer.selectedFolder')} <code className="font-mono">{selectedPath}</code>
                  </AlertDescription>
                </Alert>
              )}
            </div>

            {/* Folder Stats */}
            {folders?.success && folders.data.length > 0 && (
              <div className="text-xs text-muted-foreground text-center">
                {folders.data.filter(f => f.isDirectory).length} folders, {folders.data.filter(f => !f.isDirectory).length} files
              </div>
            )}
          </CardContent>
        </Card>
      );
    }