// lib/models/playlist_summary.dart

/// 歌单列表用的轻量摘要（不加载歌单内全部歌曲）
class PlaylistSummary {
  final String id;
  final String name;
  final int songCount;

  /// 封面：取歌单里第一首有封面的歌
  final String? coverPath;
  final int updatedAt;

  const PlaylistSummary({
    required this.id,
    required this.name,
    this.songCount = 0,
    this.coverPath,
    this.updatedAt = 0,
  });

  factory PlaylistSummary.fromRow(Map<String, dynamic> row) {
    final cover = (row['cover_path'] as String?)?.trim() ?? '';
    return PlaylistSummary(
      id: row['id'] as String? ?? '',
      name: (row['name'] as String?)?.trim() ?? '',
      songCount: (row['song_count'] as num?)?.toInt() ?? 0,
      coverPath: cover.isEmpty ? null : cover,
      updatedAt: (row['updated_at'] as num?)?.toInt() ?? 0,
    );
  }

  bool get isEmpty => songCount == 0;
}