import 'package:hepan_everyday/data/snapshot_store.dart';
import 'package:hepan_everyday/domain/app_snapshot.dart';
import 'package:hepan_everyday/domain/app_settings.dart';
import 'package:hepan_everyday/domain/course_occurrence.dart';
import 'package:hepan_everyday/services/notification_service.dart';
import 'package:hepan_everyday/services/calendar_service.dart';

class MemoryStore extends SnapshotStore {
  MemoryStore([this.value]);
  AppSnapshot? value;
  bool failSave = false;
  @override
  Future<AppSnapshot?> load() async => value;
  @override
  Future<void> save(AppSnapshot snapshot) async {
    if (failSave) throw StateError('磁盘写入失败');
    value = snapshot;
  }
}

class FakeNotifications extends NotificationService {
  int reconciliations = 0, cancellations = 0;
  bool fail = false;
  @override
  Future<ReminderResult> reconcile(
    List<CourseOccurrence> occurrences,
    AppSettings settings,
    DateTime now,
  ) async {
    reconciliations++;
    if (fail) throw StateError('系统拒绝');
    return ReminderResult(
      settings.remindersEnabled ? ReminderStatus.exact : ReminderStatus.off,
      scheduledCount: occurrences.length,
    );
  }

  @override
  Future<void> cancelOwned() async {
    cancellations++;
  }

  @override
  Future<void> requestPermissions() async {}
}

class FakeCalendar extends CalendarService {
  bool access = true;
  int synchronizations = 0, deletions = 0;
  @override
  Future<bool> requestAccess() async => access;
  @override
  Future<List<DeviceCalendar>> listWritableCalendars() async => [
    const DeviceCalendar('local', '测试日历'),
  ];
  @override
  Future<Map<String, String>> sync(
    List<CourseOccurrence> occurrences,
    String calendarId,
    Map<String, String> knownEventIds,
  ) async {
    synchronizations++;
    return {
      for (final e in occurrences)
        e.key: knownEventIds[e.key] ?? 'event-${e.key}',
    };
  }

  @override
  Future<void> deleteOwned(Map<String, String> eventIds) async {
    deletions++;
  }
}