/// Raw API response model — mirrors the JSON returned by the verification endpoint.
///
/// Example JSON:
/// ```json
/// {
///   "success": true,
///   "statusMessage": "Authentication successful!",
///   "personInfo": {
///     "firstName": "ASIF",
///     "lastName": "EHTESHAM UL HAQ",
///     "fatherName": "RAZA EHTESHAM",
///     "grandfatherName": "MUHAMMAD",
///     "occupation": "Computer Science Specialist",
///     "gender": "1",
///     "sponsor": "",
///     "idNumber": "2257773628",
///     "birthDate": "1985-01-04",
///     "nationality": "304"
///   },
///   "error": {
///     "type": "",
///     "message": ""
///   }
/// }
/// ```
class AuthResponseModel {
  final bool success;
  final String statusMessage;
  final PersonInfoResponse? personInfo;
  final ErrorResponse? error;

  const AuthResponseModel({
    required this.success,
    required this.statusMessage,
    this.personInfo,
    this.error,
  });

  factory AuthResponseModel.fromJson(Map<String, dynamic> json) {
    return AuthResponseModel(
      success: json['success'] as bool? ?? false,
      statusMessage: json['statusMessage'] as String? ?? '',
      personInfo: json['personInfo'] != null
          ? PersonInfoResponse.fromJson(
              json['personInfo'] as Map<String, dynamic>)
          : null,
      error: json['error'] != null
          ? ErrorResponse.fromJson(json['error'] as Map<String, dynamic>)
          : null,
    );
  }

  Map<String, dynamic> toJson() => {
        'success': success,
        'statusMessage': statusMessage,
        'personInfo': personInfo?.toJson(),
        'error': error?.toJson(),
      };
}

/// Sub-model for the person information section of the response.
class PersonInfoResponse {
  final String firstName;
  final String lastName;
  final String fatherName;
  final String grandfatherName;
  final String occupation;
  final String gender;
  final String sponsor;
  final String idNumber;
  final String birthDate;
  final String nationality;

  const PersonInfoResponse({
    required this.firstName,
    required this.lastName,
    required this.fatherName,
    required this.grandfatherName,
    required this.occupation,
    required this.gender,
    required this.sponsor,
    required this.idNumber,
    required this.birthDate,
    required this.nationality,
  });

  factory PersonInfoResponse.fromJson(Map<String, dynamic> json) {
    return PersonInfoResponse(
      firstName: json['firstName'] as String? ?? '',
      lastName: json['lastName'] as String? ?? '',
      fatherName: json['fatherName'] as String? ?? '',
      grandfatherName: json['grandfatherName'] as String? ?? '',
      occupation: json['occupation'] as String? ?? '',
      gender: json['gender'] as String? ?? '',
      sponsor: json['sponsor'] as String? ?? '',
      idNumber: json['idNumber'] as String? ?? '',
      birthDate: json['birthDate'] as String? ?? '',
      nationality: json['nationality'] as String? ?? '',
    );
  }

  Map<String, dynamic> toJson() => {
        'firstName': firstName,
        'lastName': lastName,
        'fatherName': fatherName,
        'grandfatherName': grandfatherName,
        'occupation': occupation,
        'gender': gender,
        'sponsor': sponsor,
        'idNumber': idNumber,
        'birthDate': birthDate,
        'nationality': nationality,
      };
}

/// Sub-model for the error section of the response.
class ErrorResponse {
  final String type;
  final String message;

  const ErrorResponse({
    required this.type,
    required this.message,
  });

  factory ErrorResponse.fromJson(Map<String, dynamic> json) {
    return ErrorResponse(
      type: json['type'] as String? ?? '',
      message: json['message'] as String? ?? '',
    );
  }

  Map<String, dynamic> toJson() => {
        'type': type,
        'message': message,
      };

  bool get hasError => type.isNotEmpty || message.isNotEmpty;
}