export interface NotificationLookupArguments {
  deviceId: string;
  shuttleId: string;
  stopId: string;
}

export interface ScheduledNotification extends NotificationLookupArguments {
  /**
   * Value which specifies the ETA of the shuttle for when
   * the notification should fire.
   * For example, a secondsThreshold of 180 would mean that the notification
   * fires when the ETA drops below 3 minutes.
   */
  secondsThreshold: number;
}

export type Listener = ((event: NotificationEvent) => any);

export interface NotificationEvent {
  notification: ScheduledNotification,
  event: 'delete' | 'addOrUpdate'
}

export interface NotificationRepository {
  getAllNotificationsForShuttleAndStopId(shuttleId: string, stopId: string): Promise<ScheduledNotification[]>;
  getSecondsThresholdForNotificationIfExists(lookupArguments: NotificationLookupArguments): Promise<number | null>;
  isNotificationScheduled(lookupArguments: NotificationLookupArguments): Promise<boolean>;
  addOrUpdateNotification(notification: ScheduledNotification): Promise<void>;
  deleteNotificationIfExists(lookupArguments: NotificationLookupArguments): Promise<void>;

  subscribeToNotificationChanges(listener: Listener): void;
  unsubscribeFromNotificationChanges(listener: Listener): void;
}