import 'package:flutter_test/flutter_test.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:travel_mate/models/reminder_item.dart';
import 'package:travel_mate/services/reminder_service.dart';

void main() {
  const tripId = 'trip-reminders-1';
  late ReminderService service;

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

  test('adds and toggles reminders', () async {
    final r = ReminderItem.newItem(
      id: 'r1',
      title: 'Check-in en ligne',
      dueAt: DateTime.utc(2026, 4, 10, 7),
    );
    await service.addReminder(tripId, r);
    var list = await service.loadReminders(tripId);
    expect(list.single.isDone, isFalse);

    list = await service.toggleReminder(tripId, 'r1');
    expect(list.single.isDone, isTrue);
  });

  test('deletes and clears corrupted payload', () async {
    final r = ReminderItem.newItem(
      id: 'r1',
      title: 'Acheter métro pass',
      dueAt: DateTime.utc(2026, 4, 1),
    );
    await service.addReminder(tripId, r);
    var list = await service.deleteReminder(tripId, 'r1');
    expect(list, isEmpty);

    final prefs = await SharedPreferences.getInstance();
    await prefs.setString('reminders_$tripId', 'oops');
    list = await service.loadReminders(tripId);
    expect(list, isEmpty);
    expect(prefs.getString('reminders_$tripId'), isNull);
  });
}