UnionApp/lib/model/song_model.dart

class SongModel {
  final int id;
  final int players;
  final String title;
  final String artist;
  final Map<String, dynamic>? utTitle; // 可选，根据不同版本标题可能不同
  final List<String> albums;
  final bool hasDx;
  final bool hasSd;
  final bool hasUt;
  final String genre;
  final int bpm;
  final String releaseDate;
  final String from;

  // 新增：四个标签字段
  final bool cn;
  final bool jp;
  final bool m2l;
  final bool long;

  // 难度详情映射 key通常是 "0"(Basic), "1"(Advanced) 等，或者 ut 的特殊id
  final Map<String, dynamic>? dx;
  final Map<String, dynamic>? sd;
  final Map<String, dynamic>? ut;

  SongModel({
    required this.id,
    required this.players,
    required this.title,
    required this.artist,
    this.utTitle,
    required this.albums,
    required this.hasDx,
    required this.hasSd,
    required this.hasUt,
    required this.genre,
    required this.bpm,
    required this.releaseDate,
    required this.from,
    // 新增
    required this.cn,
    required this.jp,
    required this.m2l,
    required this.long,
    this.dx,
    this.sd,
    this.ut,
  });

  factory SongModel.fromJson(Map<String, dynamic> json) {
    return SongModel(
      id: json['id'] ?? 0,
      players: json['players']??0,
      title: json['title'] ?? 'Unknown',
      artist: json['artist'] ?? 'Unknown',
      utTitle: json['utTitle'],
      albums: List<String>.from(json['albums'] ?? []),
      hasDx: json['hasDx'] ?? false,
      hasSd: json['hasSd'] ?? false,
      hasUt: json['hasUt'] ?? false,
      genre: json['genre'] ?? '',
      bpm: json['bpm'] ?? 0,
      releaseDate: json['releaseDate'] ?? '',
      from: json['from'] ?? '',
      // 新增：JSON 解析，默认 false 更安全
      cn: json['cn'] ?? false,
      jp: json['jp'] ?? false,
      m2l: json['m2l'] ?? false,
      long: json['long'] ?? false,
      dx: json['dx'],
      sd: json['sd'],
      ut: json['ut'],
    );
  }
}

// 用于存储本地缓存的版本信息
class SongCacheInfo {
  final int songSize;
  final String version;
  final DateTime lastUpdate;

  SongCacheInfo({
    required this.songSize,
    required this.version,
    required this.lastUpdate,
  });

  Map<String, dynamic> toJson() => {
    'songSize': songSize,
    'version': version,
    'lastUpdate': lastUpdate.millisecondsSinceEpoch,
  };

  factory SongCacheInfo.fromJson(Map<String, dynamic> json) {
    return SongCacheInfo(
      songSize: json['songSize'] ?? 0,
      version: json['version'] ?? '',
      lastUpdate: DateTime.fromMillisecondsSinceEpoch(json['lastUpdate'] ?? 0),
    );
  }
}

// lib/model/chart_log_model.dart

class ChartLogModel {
  final String id;
  final dynamic segaChartOld; // 根据示例为 null，类型暂定为 dynamic
  final SegaChartNew? segaChartNew;
  final String userId;
  final int musicId;
  final int time; // 时间戳

  ChartLogModel({
    required this.id,
    this.segaChartOld,
    this.segaChartNew,
    required this.userId,
    required this.musicId,
    required this.time,
  });

  factory ChartLogModel.fromJson(Map<String, dynamic> json) {
    return ChartLogModel(
      id: json['id'] as String? ?? '',
      segaChartOld: json['sega_chartOld'],
      segaChartNew: json['sega_chartNew'] != null
          ? SegaChartNew.fromJson(json['sega_chartNew'] as Map<String, dynamic>)
          : null,
      userId: json['userId'] as String? ?? '',
      musicId: json['musicId'] as int? ?? 0,
      time: json['time'] as int? ?? 0,
    );
  }
}

class SegaChartNew {
  final int musicId;
  final String? musicName;
  final int level;
  final double levelInfo;
  final int romVersion;
  final int achievement;
  final int rating;
  final String? type;
  final int playCount;
  final int comboStatus;
  final int syncStatus;
  final int deluxscoreMax;
  final int scoreRank;
  final int extNum1;
  final int extNum2;
  final List<String> alias;

  SegaChartNew({
    required this.musicId,
    this.musicName,
    required this.level,
    required this.levelInfo,
    required this.romVersion,
    required this.achievement,
    required this.rating,
    this.type,
    required this.playCount,
    required this.comboStatus,
    required this.syncStatus,
    required this.deluxscoreMax,
    required this.scoreRank,
    required this.extNum1,
    required this.extNum2,
    required this.alias,
  });

  factory SegaChartNew.fromJson(Map<String, dynamic> json) {
    // 处理 alias 可能存在的非字符串或 null 情况，确保安全性
    var rawAlias = json['alias'];
    List<String> aliasList = [];
    if (rawAlias is List) {
      aliasList = rawAlias.map((e) => e?.toString() ?? '').toList();
    }

    return SegaChartNew(
      musicId: json['musicId'] as int? ?? 0,
      musicName: json['musicName'] as String?,
      level: json['level'] as int? ?? 0,
      levelInfo: (json['level_info'] as num?)?.toDouble() ?? 0.0,
      romVersion: json['romVersion'] as int? ?? 0,
      achievement: json['achievement'] as int? ?? 0,
      rating: json['rating'] as int? ?? 0,
      type: json['type'] as String?,
      playCount: json['playCount'] as int? ?? 0,
      comboStatus: json['comboStatus'] as int? ?? 0,
      syncStatus: json['syncStatus'] as int? ?? 0,
      deluxscoreMax: json['deluxscoreMax'] as int? ?? 0,
      scoreRank: json['scoreRank'] as int? ?? 0,
      extNum1: json['extNum1'] as int? ?? 0,
      extNum2: json['extNum2'] as int? ?? 0,
      alias: aliasList,
    );
  }
}