import 'package:flutter_test/flutter_test.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'package:hl_lieferservice/domain/entity/car.dart';
import 'package:hl_lieferservice/domain/repository/cars_repository.dart';
import 'package:hl_lieferservice/feature/car_selection/bloc/bloc.dart';
import 'package:hl_lieferservice/feature/car_selection/bloc/events.dart';
import 'package:hl_lieferservice/feature/car_selection/bloc/state.dart';
import 'package:hl_lieferservice/feature/car_selection/repository/car_selection_repository.dart';

/// Fahrzeuge „laut Server" für den angemeldeten Account.
class _ServerCars implements CarsRepository {
  _ServerCars(this.cars);
  final List<Car> cars;

  @override
  Future<List<Car>> listMine({bool includeInactive = false}) async => cars;

  @override
  dynamic noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
}

const _fremdesAuto = 'b918b721-0000-0000-0000-000000000423';

Map<String, Object> _gespeichert(String userId, String carId) => {
  'flutter.car_selection_test_${userId}_date': DateTime.now().toIso8601String(),
  'flutter.car_selection_test_${userId}_car_id': carId,
  'flutter.car_selection_test_${userId}_car_plate': 'test',
};

Future<CarSelectState> _laden(String userId, List<Car> serverCars) async {
  final bloc = CarSelectBloc(
    repository: CarSelectionRepository(environmentId: 'test'),
    carsRepository: _ServerCars(serverCars),
  )..add(CarSelectLoad(userId: userId));
  final state = await bloc.stream.firstWhere(
    (s) => s is! CarSelectLoading,
  );
  await bloc.close();
  return state;
}

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  test('gespeichertes Fahrzeug eines anderen Fahrers wird verworfen', () async {
    // 414 hat auf diesem Gerät das Auto von 423 als Tagesfahrzeug gespeichert.
    SharedPreferences.setMockInitialValues(_gespeichert('414', _fremdesAuto));

    final state = await _laden('414', const []);

    expect(state, isA<CarSelectRequired>());
    final prefs = await SharedPreferences.getInstance();
    expect(prefs.getString('car_selection_test_414_car_id'), isNull);
  });

  test('eigenes aktives Fahrzeug wird übernommen, mit Serverdaten', () async {
    SharedPreferences.setMockInitialValues(_gespeichert('423', _fremdesAuto));
    const auto = Car(id: _fremdesAuto, accountId: 423, plate: 'test', active: true);

    final state = await _laden('423', const [auto]);

    expect(state, isA<CarSelectComplete>());
    expect((state as CarSelectComplete).selectedCar.accountId, 423);
  });

  test('deaktiviertes Fahrzeug gilt nicht mehr', () async {
    SharedPreferences.setMockInitialValues(_gespeichert('423', _fremdesAuto));
    const auto =
        Car(id: _fremdesAuto, accountId: 423, plate: 'test', active: false);

    expect(await _laden('423', const [auto]), isA<CarSelectRequired>());
  });
}