rely/test/features/reminders/scheduling/reminder_scheduler_local_notifications_test.dart

import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:relationship_saver/features/local/local_models.dart';
import 'package:relationship_saver/features/reminders/scheduling/reminder_scheduler_local_notifications.dart';

void main() {
  test(
    'reconcile schedules enabled reminders and cancels previous jobs',
    () async {
      final FakeReminderNotificationsDriver driver =
          FakeReminderNotificationsDriver();
      final LocalNotificationsReminderScheduler scheduler =
          LocalNotificationsReminderScheduler(
            driver: driver,
            now: () => DateTime(2026, 2, 16, 10),
          );

      await scheduler.reconcile(<ReminderRule>[
        ReminderRule(
          id: 'r-daily',
          title: 'Daily check-in',
          cadence: ReminderCadence.daily,
          nextAt: DateTime(2026, 2, 16, 20),
        ),
        ReminderRule(
          id: 'r-weekly',
          title: 'Weekly date plan',
          cadence: ReminderCadence.weekly,
          nextAt: DateTime(2026, 2, 17, 9),
        ),
        ReminderRule(
          id: 'r-disabled',
          title: 'Disabled reminder',
          cadence: ReminderCadence.monthly,
          nextAt: DateTime(2026, 2, 18, 8),
          enabled: false,
        ),
      ]);

      expect(driver.initializeCalls, 1);
      expect(driver.cancelAllCalls, 1);
      expect(driver.scheduled.length, 2);
      expect(driver.scheduled[0].repeatComponents, DateTimeComponents.time);
      expect(
        driver.scheduled[1].repeatComponents,
        DateTimeComponents.dayOfWeekAndTime,
      );
    },
  );

  test('clearAll clears notification schedule', () async {
    final FakeReminderNotificationsDriver driver =
        FakeReminderNotificationsDriver();
    final LocalNotificationsReminderScheduler scheduler =
        LocalNotificationsReminderScheduler(driver: driver);

    await scheduler.clearAll();

    expect(driver.initializeCalls, 1);
    expect(driver.cancelAllCalls, 1);
  });
}

class FakeReminderNotificationsDriver implements ReminderNotificationsDriver {
  int initializeCalls = 0;
  int cancelAllCalls = 0;
  final List<ScheduledCall> scheduled = <ScheduledCall>[];

  @override
  Future<void> cancelAll() async {
    cancelAllCalls += 1;
  }

  @override
  Future<void> ensureInitialized() async {
    initializeCalls += 1;
  }

  @override
  Future<void> schedule({
    required int id,
    required String title,
    required String body,
    required DateTime scheduledAt,
    required DateTimeComponents? repeatComponents,
    required String payload,
  }) async {
    scheduled.add(
      ScheduledCall(
        id: id,
        title: title,
        body: body,
        scheduledAt: scheduledAt,
        repeatComponents: repeatComponents,
        payload: payload,
      ),
    );
  }
}

class ScheduledCall {
  const ScheduledCall({
    required this.id,
    required this.title,
    required this.body,
    required this.scheduledAt,
    required this.repeatComponents,
    required this.payload,
  });

  final int id;
  final String title;
  final String body;
  final DateTime scheduledAt;
  final DateTimeComponents? repeatComponents;
  final String payload;
}