import { Injectable, NotFoundException, Logger } from '@nestjs/common';
import { NotificationsRepository } from './notifications.repository';
import { RedisService } from '../../infrastructure/redis/redis.service';
import { QueueService } from '../../infrastructure/queue/queue.service';

@Injectable()
export class NotificationsService {
  private readonly logger = new Logger(NotificationsService.name);

  constructor(
    private readonly repository: NotificationsRepository,
    private readonly redis: RedisService,
    private readonly queue: QueueService,
  ) {}

  async list() {
    return this.repository.findAll();
  }

  async markRead(id: string) {
    const notification = await this.repository.markRead(id);
    if (!notification) throw new NotFoundException(`Notification ${id} not found`);
    return notification;
  }

  async send(data: { userId: string; type: string; title: string; body: string }) {
    const notification = await this.repository.create(data);
    this.queue.add('notification', { notificationId: notification.id, ...data });
    this.redis.set(
      `session:notifications:${data.userId}:last_sent`,
      new Date().toISOString(),
      86400,
    );
    this.logger.log(`Notification ${notification.id} sent to user ${data.userId}`);
    return notification;
  }
}