class User {
  final String id;
  final String phone;
  final String nickname;
  final String? email;
  final List<String> familyIds;
  final String? activeFamilyId;
  final String joinDate;
  final String createdAt;

  const User({
    required this.id,
    required this.phone,
    required this.nickname,
    this.email,
    this.familyIds = const [],
    this.activeFamilyId,
    this.joinDate = '',
    this.createdAt = '',
  });

  factory User.fromJson(Map<String, dynamic> json) {
    return User(
      id: json['id'] as String? ?? '',
      phone: json['phone'] as String? ?? '',
      nickname: json['nickname'] as String? ?? '',
      email: json['email'] as String?,
      familyIds: (json['familyIds'] as List<dynamic>?)?.cast<String>() ?? [],
      activeFamilyId: json['activeFamilyId'] as String?,
      joinDate: json['joinDate'] as String? ?? '',
      createdAt: json['createdAt'] as String? ?? '',
    );
  }

  Map<String, dynamic> toJson() => {
    'id': id,
    'phone': phone,
    'nickname': nickname,
    'email': email,
    'familyIds': familyIds,
    'activeFamilyId': activeFamilyId,
    'joinDate': joinDate,
    'createdAt': createdAt,
  };
}