import '../domain/app_settings.dart';
import '../domain/course_occurrence.dart';

enum ReminderStatus { off, permissionDenied, exact, inexact, error }

class ReminderResult {
  const ReminderResult(
    this.status, {
    this.scheduledCount = 0,
    this.message = '',
  });
  final ReminderStatus status;
  final int scheduledCount;
  final String message;
}

abstract class NotificationService {
  Future<ReminderResult> reconcile(
    List<CourseOccurrence> occurrences,
    AppSettings settings,
    DateTime now,
  );
  Future<void> requestPermissions();
  Future<void> cancelOwned();
  Future<String> sendTestReminder({required bool scheduled}) async =>
      '当前环境不支持通知测试';
  Future<Map<String, Object?>> diagnose() async => {};
  Future<void> openSettings({required bool background}) async {}
}

class ReminderSetupException implements Exception {
  const ReminderSetupException(this.code, this.message);
  final String code, message;
}