class SongModel {
  final String mid;
  final String? id;
  final String name;
  final String artist;
  final String album;
  final int duration; // 毫秒
  final String? albumPic;

  SongModel({
    required this.mid,
    this.id,
    required this.name,
    required this.artist,
    required this.album,
    required this.duration,
    this.albumPic,
  });

  factory SongModel.fromJson(Map<String, dynamic> json) {
    return SongModel(
      mid: json['mid'] ?? '',
      id: json['id'],
      name: json['name'] ?? '',
      artist: json['artist'] ?? json['singer'] ?? '',
      album: json['album'] ?? '',
      duration: json['duration'] ?? 0,
      albumPic: json['albumPic'] ?? json['pic'] ?? json['coverUri'],
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'mid': mid,
      'id': id,
      'name': name,
      'artist': artist,
      'singer': artist, // 兼容性字段
      'album': album,
      'duration': duration,
      'albumPic': albumPic,
      'pic': albumPic, // 兼容性字段
      'coverUri': albumPic, // 兼容性字段
    };
  }

  @override
  String toString() {
    return 'SongModel(mid: $mid, name: $name, artist: $artist, album: $album, duration: $duration)';
  }

  @override
  bool operator ==(Object other) {
    if (identical(this, other)) return true;
    return other is SongModel && other.mid == mid;
  }

  @override
  int get hashCode => mid.hashCode;
}