/**
 * Application Use Case: GetUnreadNotificationsUseCase
 * 
 * Retrieves unread notifications for a recipient.
 */

import type { AsyncUseCase } from '@gridpilot/shared/application';
import type { Notification } from '../../domain/entities/Notification';
import type { INotificationRepository } from '../../domain/repositories/INotificationRepository';

export interface UnreadNotificationsResult {
  notifications: Notification[];
  totalCount: number;
}

export class GetUnreadNotificationsUseCase implements AsyncUseCase<string, UnreadNotificationsResult> {
  constructor(
    private readonly notificationRepository: INotificationRepository,
  ) {}

  async execute(recipientId: string): Promise<UnreadNotificationsResult> {
    const notifications = await this.notificationRepository.findUnreadByRecipientId(recipientId);
    
    return {
      notifications,
      totalCount: notifications.length,
    };
  }
}

/**
 * Additional notification query/use case types (e.g., listing or counting notifications)
 * can be added here in the future as needed.
 */