/**
 * Composant pour les actions batch sur les playlists
 * T0506: Create Playlist Batch Operations
 */

import { useState } from 'react';
import { Button } from '@/components/ui/button';
import { Dialog } from '@/components/ui/dialog';
import { Trash2, Share2, Download, X, Loader2 } from 'lucide-react';
import { useDeletePlaylist, useCreateShareLink } from '../hooks/usePlaylist';
import { useToast } from '@/hooks/useToast';
import { cn } from '@/lib/utils';
import type { Playlist } from '../types';

interface PlaylistBatchActionsProps {
  selectedPlaylists: Playlist[];
  onSelectionClear: () => void;
  onPlaylistsDeleted?: () => void;
  className?: string;
}

/**
 * Exporte les playlists sélectionnées au format JSON
 */
function exportPlaylistsToJSON(playlists: Playlist[]): void {
  const dataStr = JSON.stringify(playlists, null, 2);
  const dataBlob = new Blob([dataStr], { type: 'application/json' });
  const url = URL.createObjectURL(dataBlob);
  const link = document.createElement('a');
  link.href = url;
  link.download = `playlists-${new Date().toISOString().split('T')[0]}.json`;
  document.body.appendChild(link);
  link.click();
  document.body.removeChild(link);
  URL.revokeObjectURL(url);
}

/**
 * Exporte les playlists sélectionnées au format CSV
 */
function exportPlaylistsToCSV(playlists: Playlist[]): void {
  const headers = [
    'ID',
    'Titre',
    'Description',
    'Publique',
    'Nombre de tracks',
    'Créée le',
  ];
  const rows = playlists.map((p) => [
    p.id.toString(),
    p.title,
    p.description || '',
    p.is_public ? 'Oui' : 'Non',
    p.track_count.toString(),
    new Date(p.created_at).toLocaleDateString('fr-FR'),
  ]);

  const csvContent = [
    headers.join(','),
    ...rows.map((row) =>
      row.map((cell) => `"${cell.replace(/"/g, '""')}"`).join(','),
    ),
  ].join('\n');

  const dataBlob = new Blob([`\ufeff${csvContent}`], {
    type: 'text/csv;charset=utf-8;',
  });
  const url = URL.createObjectURL(dataBlob);
  const link = document.createElement('a');
  link.href = url;
  link.download = `playlists-${new Date().toISOString().split('T')[0]}.csv`;
  document.body.appendChild(link);
  link.click();
  document.body.removeChild(link);
  URL.revokeObjectURL(url);
}

export function PlaylistBatchActions({
  selectedPlaylists,
  onSelectionClear,
  onPlaylistsDeleted,
  className,
}: PlaylistBatchActionsProps) {
  const [showDeleteDialog, setShowDeleteDialog] = useState(false);
  const [isDeleting, setIsDeleting] = useState(false);
  const [isSharing, setIsSharing] = useState(false);
  const { success: showSuccess, error: showError } = useToast();
  const deleteMutation = useDeletePlaylist();
  const createShareLinkMutation = useCreateShareLink();

  const selectedCount = selectedPlaylists.length;

  if (selectedCount === 0) {
    return null;
  }

  const handleDelete = async () => {
    setIsDeleting(true);
    let successCount = 0;
    let errorCount = 0;

    try {
      for (const playlist of selectedPlaylists) {
        try {
          await deleteMutation.mutateAsync(playlist.id);
          successCount++;
        } catch (error) {
          errorCount++;
          console.error(`Failed to delete playlist ${playlist.id}:`, error);
        }
      }

      if (successCount > 0) {
        showSuccess(
          `${successCount} playlist${successCount > 1 ? 's' : ''} supprimée${successCount > 1 ? 's' : ''} avec succès.`,
        );
        onSelectionClear();
        onPlaylistsDeleted?.();
      }

      if (errorCount > 0) {
        showError(
          `${errorCount} playlist${errorCount > 1 ? 's' : ''} n'a${errorCount > 1 ? 'ont' : ''} pas pu être supprimée${errorCount > 1 ? 's' : ''}.`,
        );
      }
    } finally {
      setIsDeleting(false);
      setShowDeleteDialog(false);
    }
  };

  const handleShare = async () => {
    setIsSharing(true);
    const shareLinks: string[] = [];

    try {
      for (const playlist of selectedPlaylists) {
        try {
          const result = await createShareLinkMutation.mutateAsync(playlist.id);
          // Le résultat est un PlaylistShareLink avec share_token
          if (result && typeof result === 'object' && 'share_token' in result) {
            const shareUrl = `${window.location.origin}/playlists/shared/${result.share_token}`;
            shareLinks.push(shareUrl);
          }
        } catch (error) {
          console.error(
            `Failed to create share link for playlist ${playlist.id}:`,
            error,
          );
        }
      }

      if (shareLinks.length > 0) {
        // Copier les liens dans le presse-papiers
        const linksText = shareLinks.join('\n');
        await navigator.clipboard.writeText(linksText);
        showSuccess(
          `${shareLinks.length} lien${shareLinks.length > 1 ? 's' : ''} copié${shareLinks.length > 1 ? 's' : ''} dans le presse-papiers.`,
        );
        onSelectionClear();
      } else {
        showError('Impossible de créer les liens de partage.');
      }
    } finally {
      setIsSharing(false);
    }
  };

  const handleExportJSON = () => {
    try {
      exportPlaylistsToJSON(selectedPlaylists);
      showSuccess(
        `${selectedCount} playlist${selectedCount > 1 ? 's' : ''} exportée${selectedCount > 1 ? 's' : ''} en JSON.`,
      );
      onSelectionClear();
    } catch (error) {
      showError("Impossible d'exporter les playlists.");
    }
  };

  const handleExportCSV = () => {
    try {
      exportPlaylistsToCSV(selectedPlaylists);
      showSuccess(
        `${selectedCount} playlist${selectedCount > 1 ? 's' : ''} exportée${selectedCount > 1 ? 's' : ''} en CSV.`,
      );
      onSelectionClear();
    } catch (error) {
      showError("Impossible d'exporter les playlists.");
    }
  };

  return (
    <div
      className={cn(
        'flex flex-col sm:flex-row items-start sm:items-center justify-between gap-3 sm:gap-4',
        'p-4 bg-blue-50 dark:bg-blue-900/20 border border-blue-200 dark:border-blue-800 rounded-lg',
        'sticky top-0 z-10 backdrop-blur-sm',
        className,
      )}
      role="region"
      aria-label={`Actions batch pour ${selectedCount} playlist${selectedCount > 1 ? 's' : ''} sélectionnée${selectedCount > 1 ? 's' : ''}`}
    >
      <div className="flex items-center gap-3">
        <span className="text-sm font-medium text-blue-900 dark:text-blue-100">
          {selectedCount} playlist{selectedCount > 1 ? 's' : ''} sélectionnée
          {selectedCount > 1 ? 's' : ''}
        </span>
        <Button
          variant="ghost"
          size="sm"
          onClick={onSelectionClear}
          className="h-8 w-8 p-0 touch-manipulation"
          aria-label="Désélectionner toutes les playlists"
        >
          <X className="h-4 w-4" aria-hidden="true" />
        </Button>
      </div>

      <div className="flex flex-wrap items-center gap-2 w-full sm:w-auto">
        <Button
          variant="outline"
          size="sm"
          onClick={handleShare}
          disabled={isSharing || isDeleting}
          className="touch-manipulation min-h-[44px] sm:min-h-0 flex-1 sm:flex-initial"
          aria-label="Partager les playlists sélectionnées"
        >
          {isSharing ? (
            <>
              <Loader2
                className="h-4 w-4 sm:mr-2 animate-spin"
                aria-hidden="true"
              />
              <span className="hidden sm:inline">Partage...</span>
            </>
          ) : (
            <>
              <Share2 className="h-4 w-4 sm:mr-2" aria-hidden="true" />
              <span className="hidden sm:inline">Partager</span>
            </>
          )}
        </Button>

        <Button
          variant="outline"
          size="sm"
          onClick={handleExportJSON}
          disabled={isSharing || isDeleting}
          className="touch-manipulation min-h-[44px] sm:min-h-0 flex-1 sm:flex-initial"
          aria-label="Exporter en JSON"
        >
          <Download className="h-4 w-4 sm:mr-2" aria-hidden="true" />
          <span className="hidden sm:inline">JSON</span>
        </Button>

        <Button
          variant="outline"
          size="sm"
          onClick={handleExportCSV}
          disabled={isSharing || isDeleting}
          className="touch-manipulation min-h-[44px] sm:min-h-0 flex-1 sm:flex-initial"
          aria-label="Exporter en CSV"
        >
          <Download className="h-4 w-4 sm:mr-2" aria-hidden="true" />
          <span className="hidden sm:inline">CSV</span>
        </Button>

        <Button
          variant="destructive"
          size="sm"
          onClick={() => setShowDeleteDialog(true)}
          disabled={isSharing || isDeleting}
          className="touch-manipulation min-h-[44px] sm:min-h-0 flex-1 sm:flex-initial"
          aria-label="Supprimer les playlists sélectionnées"
        >
          {isDeleting ? (
            <>
              <Loader2
                className="h-4 w-4 sm:mr-2 animate-spin"
                aria-hidden="true"
              />
              <span className="hidden sm:inline">Suppression...</span>
            </>
          ) : (
            <>
              <Trash2 className="h-4 w-4 sm:mr-2" aria-hidden="true" />
              <span className="hidden sm:inline">Supprimer</span>
            </>
          )}
        </Button>
      </div>

      {/* Delete Confirmation Dialog */}
      <Dialog
        open={showDeleteDialog}
        onClose={() => setShowDeleteDialog(false)}
        title="Supprimer les playlists ?"
        variant="alert"
        onConfirm={handleDelete}
        onCancel={() => setShowDeleteDialog(false)}
        confirmLabel={isDeleting ? 'Suppression...' : 'Supprimer'}
        cancelLabel="Annuler"
        showCancel={true}
        size="md"
        aria-label="Dialogue de confirmation de suppression batch"
      >
        <div className="space-y-4">
          <p className="text-sm text-muted-foreground">
            Vous êtes sur le point de supprimer <strong>{selectedCount}</strong>{' '}
            playlist{selectedCount > 1 ? 's' : ''}. Cette action est
            irréversible.
          </p>
          <div className="p-3 bg-muted rounded-md max-h-48 overflow-y-auto">
            <p className="text-sm font-medium mb-2">Playlists à supprimer :</p>
            <ul className="text-sm text-muted-foreground space-y-1">
              {selectedPlaylists.map((playlist) => (
                <li key={playlist.id}>• {playlist.title}</li>
              ))}
            </ul>
          </div>
        </div>
      </Dialog>
    </div>
  );
}