import 'auth_response_model.dart';
import 'fingerprint_verify_response_model.dart';

/// Presentation-layer model derived from [AuthResponseModel].
///
/// All raw API fields are mapped and sanitised here so the UI layer
/// never has to inspect raw JSON.
class AuthResultUiModel {
  final bool isSuccess;
  final String statusMessage;

  // ── Person Information ─────────────────────────────────────────────────────
  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;

  // ── Error ──────────────────────────────────────────────────────────────────
  /// null when there is no error.
  final String? errorType;

  /// null when there is no error.
  final String? errorMessage;

  const AuthResultUiModel({
    required this.isSuccess,
    required this.statusMessage,
    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,
    this.errorType,
    this.errorMessage,
  });

  /// Convert a raw [AuthResponseModel] (legacy/mock API response) into a UI model.
  factory AuthResultUiModel.fromResponse(AuthResponseModel response) {
    final info = response.personInfo;
    final err = response.error;

    return AuthResultUiModel(
      isSuccess: response.success,
      statusMessage: response.statusMessage,
      firstName: info?.firstName ?? '',
      lastName: info?.lastName ?? '',
      fatherName: info?.fatherName ?? '',
      grandfatherName: info?.grandfatherName ?? '',
      occupation: info?.occupation ?? '',
      gender: info?.gender ?? '',
      sponsor: info?.sponsor ?? '',
      idNumber: info?.idNumber ?? '',
      birthDate: info?.birthDate ?? '',
      nationality: info?.nationality ?? '',
      errorType:
          (err?.type.isNotEmpty ?? false) ? err!.type : null,
      errorMessage:
          (err?.message.isNotEmpty ?? false) ? err!.message : null,
    );
  }

  /// Convert a [FingerprintVerifyResponseModel] (real API response for both
  /// the National-ID and Passport authentication endpoints) into a UI model.
  factory AuthResultUiModel.fromFingerprintVerifyResponse(
      FingerprintVerifyResponseModel response) {
    final data = response.data;
    final info = data?.personInfo;

    // Derive gender label from sex code
    String genderLabel = '';
    if (info?.sexCode == '1' || info?.sexCode.toLowerCase() == 'm') {
      genderLabel = 'Male';
    } else if (info?.sexCode == '2' || info?.sexCode.toLowerCase() == 'f') {
      genderLabel = 'Female';
    } else if (info?.sexCode.isNotEmpty ?? false) {
      genderLabel = info!.sexCode;
    }

    // Use English occupation if available, otherwise Arabic
    final occupationLabel = (info?.occupationDescEn.isNotEmpty ?? false)
        ? info!.occupationDescEn
        : (info?.occupationDescAr ?? '');

    // Combine first name + family name for "last name" field in the UI
    final lastName = (info?.familyName.isNotEmpty ?? false)
        ? info!.familyName
        : '';

    // Build error message from data fields when isError is true
    String? errorType;
    String? errorMessage;
    if (data?.isError == true) {
      errorType = data?.errorType.isNotEmpty == true ? data!.errorType : null;
      errorMessage =
          data?.errorMessage.isNotEmpty == true ? data!.errorMessage : null;
    }

    return AuthResultUiModel(
      isSuccess: response.success && (data?.matchFlag ?? false),
      statusMessage: response.message.isNotEmpty
          ? response.message
          : (data?.matchFlag == true
              ? 'Authentication successful!'
              : 'Authentication failed'),
      firstName: info?.firstName ?? '',
      lastName: lastName,
      fatherName: info?.fatherName ?? '',
      grandfatherName: info?.grandFatherName ?? '',
      occupation: occupationLabel,
      gender: genderLabel,
      sponsor: info?.sponsorName ?? '',
      idNumber: info?.id ?? '',
      birthDate: info?.birthDateG ?? '',
      nationality: info?.nationalityCode ?? '',
      errorType: errorType,
      errorMessage: errorMessage,
    );
  }

  /// Convenience getter — first and last name joined on two visual lines.
  String get fullNameDisplay =>
      [firstName, lastName].where((s) => s.isNotEmpty).join('\n');

  bool get hasPersonInfo =>
      firstName.isNotEmpty ||
      lastName.isNotEmpty ||
      fatherName.isNotEmpty ||
      grandfatherName.isNotEmpty ||
      occupation.isNotEmpty ||
      gender.isNotEmpty ||
      idNumber.isNotEmpty ||
      birthDate.isNotEmpty ||
      nationality.isNotEmpty;

  bool get hasError => errorType != null || errorMessage != null;
}