import 'package:flutter_test/flutter_test.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:travel_mate/models/packing_item.dart';
import 'package:travel_mate/services/packing_service.dart';

void main() {
  const tripId = 'trip-pack-1';
  late PackingService service;

  setUp(() {
    SharedPreferences.setMockInitialValues({});
    service = PackingService();
  });

  test('adds, toggles and deletes packing items', () async {
    final item = PackingItem.newItem(id: '1', label: 'Adaptateur US');
    await service.addItem(tripId, item);

    var loaded = await service.loadItems(tripId);
    expect(loaded.first.isPacked, isFalse);

    loaded = await service.toggleItem(tripId, '1');
    expect(loaded.first.isPacked, isTrue);

    loaded = await service.deleteItem(tripId, '1');
    expect(loaded, isEmpty);
  });

  test('suggested items react to cold and duration', () {
    final cold = service.suggestedItems(nights: 5, cold: true);
    expect(cold, contains('Veste chaude'));
    expect(cold, contains('Lessive/ziplock'));

    final warm = service.suggestedItems(nights: 2, cold: false);
    expect(warm, contains('Crème solaire'));
    expect(warm, isNot(contains('Lessive/ziplock')));
  });

  test('handles corrupted payload', () async {
    final prefs = await SharedPreferences.getInstance();
    await prefs.setString('packing_$tripId', 'oops');
    final items = await service.loadItems(tripId);
    expect(items, isEmpty);
    expect(prefs.getString('packing_$tripId'), isNull);
  });
}