class AppUser {
  final int id;
  final String username;
  final String? realName;
  final String? phone;
  final String role; // superadmin | admin | operator | readonly
  final bool isActive;
  final String? createdAt;
  final String? lastLoginAt;

  const AppUser({
    required this.id,
    required this.username,
    this.realName,
    this.phone,
    required this.role,
    required this.isActive,
    this.createdAt,
    this.lastLoginAt,
  });

  String get roleLabel {
    switch (role) {
      case 'superadmin':
        return '超级管理员';
      case 'admin':
        return '管理员';
      case 'operator':
        return '操作员';
      case 'readonly':
        return '只读';
      default:
        return role;
    }
  }

  factory AppUser.fromJson(Map<String, dynamic> json) => AppUser(
        id: (json['id'] as num).toInt(),
        username: json['username'] as String,
        realName: json['real_name'] as String?,
        phone: json['phone'] as String?,
        role: json['role'] as String? ?? 'operator',
        isActive: json['is_active'] as bool? ?? true,
        createdAt: json['created_at'] as String?,
        lastLoginAt: json['last_login_at'] as String?,
      );
}