import 'package:flutter_test/flutter_test.dart';
import 'package:tm_app/data/services/model/error/error_model.dart';

void main() {
  group('ErrorModel Tests', () {
    test('fromJson should parse JSON correctly', () {
      final json = {
        'message': 'Invalid request',
        'code': '400',
        'details': 'Missing required field: email',
      };

      final error = ErrorModel.fromJson(json);

      expect(error.message, 'Invalid request');
      expect(error.code, '400');
      expect(error.details, 'Missing required field: email');
    });

    test('toJson should return valid JSON map', () {
      const error = ErrorModel(
        message: 'Unauthorized',
        code: '401',
        details: 'Token expired',
      );

      final json = error.toJson();

      expect(json, isA<Map<String, dynamic>>());
      expect(json['message'], 'Unauthorized');
      expect(json['code'], '401');
      expect(json['details'], 'Token expired');
    });

    test(' copyWith should modify specific fields only', () {
      const error = ErrorModel(
        message: 'Something went wrong',
        code: '500',
        details: 'Server error',
      );

      final updated = error.copyWith(message: 'Timeout error');

      expect(updated.message, 'Timeout error');
      expect(updated.code, '500');
      expect(updated.details, 'Server error');
    });

    test('fromJson handles null fields safely', () {
      final json = {'message': null, 'code': null, 'details': null};

      final error = ErrorModel.fromJson(json);

      expect(error.message, isNull);
      expect(error.code, isNull);
      expect(error.details, isNull);
    });

    test('fromJson -> toJson round-trip should preserve data', () {
      final json = {
        'message': 'Not Found',
        'code': '404',
        'details': 'User not found',
      };

      final error = ErrorModel.fromJson(json);
      final output = error.toJson();

      expect(output['message'], 'Not Found');
      expect(output['code'], '404');
      expect(output['details'], 'User not found');
    });
  });
}

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