/// 门店分组下的主题页面（对应 web 后台 /theme/page/org/{orgId}/photos）。
class ThemePage {
  const ThemePage({
    required this.themeId,
    required this.name,
    this.themePhoto,
    this.active = false,
    this.orderNo,
  });

  /// 主题 ID（tv_theme.id）。
  final int themeId;

  /// 主题名称。
  final String name;

  /// 主题预览图 URL。
  final String? themePhoto;

  /// 是否为当前分组激活主题。
  final bool active;

  /// 排序号。
  final int? orderNo;

  factory ThemePage.fromJson(Map<String, dynamic> json) {
    final rawActive = json['active'];
    return ThemePage(
      themeId: (json['themeId'] ?? json['theme_id'] ?? json['id'] ?? 0) as int,
      name: (json['name'] ?? json['themeName'] ?? '')?.toString() ?? '',
      themePhoto: (json['themePhoto'] ?? json['theme_photo'])?.toString(),
      active: rawActive == true ||
          (rawActive is num && rawActive.toInt() == 1) ||
          (rawActive is String && rawActive.toLowerCase() == 'true'),
      orderNo: (json['orderNo'] ?? json['order_no']) is num
          ? ((json['orderNo'] ?? json['order_no']) as num).toInt()
          : null,
    );
  }
}

/// 门店设备分组及其主题列表（界面配置）。
class ThemeGroup {
  const ThemeGroup({
    required this.groupId,
    required this.groupName,
    required this.themes,
    this.themeLimit = 6,
  });

  /// 设备分组 ID。
  final int groupId;

  /// 设备分组名称。
  final String groupName;

  /// 分组下主题数量上限。
  final int themeLimit;

  /// 分组下已添加的主题列表。
  final List<ThemePage> themes;

  factory ThemeGroup.fromJson(Map<String, dynamic> json) {
    final themesRaw = json['themes'];
    final themes = themesRaw is List
        ? themesRaw
            .whereType<Map<String, dynamic>>()
            .map(ThemePage.fromJson)
            .where((t) => t.themeId > 0)
            .toList()
        : <ThemePage>[];
    themes.sort((a, b) => (a.orderNo ?? 0).compareTo(b.orderNo ?? 0));

    final rawLimit = json['themeLimit'] ?? json['theme_limit'];
    final themeLimit = rawLimit is num && rawLimit.toInt() > 0
        ? rawLimit.toInt()
        : 6;

    return ThemeGroup(
      groupId: (json['groupId'] ?? json['group_id'] ?? 0) as int,
      groupName: (json['groupName'] ?? json['group_name'] ?? '')?.toString() ??
          '未命名分组',
      themeLimit: themeLimit,
      themes: themes,
    );
  }

  /// 当前激活的主题名称（空表示未激活任何主题）。
  String? get activeThemeName {
    final active = themes.where((t) => t.active).toList();
    if (active.isEmpty) return null;
    return active.first.name;
  }
}