class UserSettings {
  final String userId;
  final int? defaultPostTtl;

  const UserSettings({
    required this.userId,
    this.defaultPostTtl,
  });

  factory UserSettings.fromJson(Map<String, dynamic> json) {
    return UserSettings(
      userId: json['user_id'] as String,
      defaultPostTtl: _parseIntervalHours(json['default_post_ttl']),
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'user_id': userId,
      'default_post_ttl': defaultPostTtl != null ? '${defaultPostTtl} hours' : null,
    };
  }

  UserSettings copyWith({
    int? defaultPostTtl,
  }) {
    return UserSettings(
      userId: userId,
      defaultPostTtl: defaultPostTtl ?? this.defaultPostTtl,
    );
  }

  static int? _parseIntervalHours(dynamic value) {
    if (value == null) return null;
    if (value is int) return value;
    if (value is double) return value.round();
    if (value is String) {
      final trimmed = value.trim();
      if (trimmed.isEmpty) return null;

      final dayMatch = RegExp(r'(\\d+)\\s+day').firstMatch(trimmed);
      final hourMatch = RegExp(r'(\\d+)\\s+hour').firstMatch(trimmed);
      final timeMatch = RegExp(r'(\\d{1,2}):(\\d{2}):(\\d{2})').firstMatch(trimmed);

      var totalHours = 0;
      if (dayMatch != null) {
        totalHours += (int.tryParse(dayMatch.group(1) ?? '') ?? 0) * 24;
      }
      if (timeMatch != null) {
        totalHours += int.tryParse(timeMatch.group(1) ?? '') ?? 0;
      } else if (hourMatch != null) {
        totalHours += int.tryParse(hourMatch.group(1) ?? '') ?? 0;
      }

      return totalHours == 0 ? null : totalHours;
    }
    return null;
  }
}