import { Injectable, Logger } from '@nestjs/common';
import { InjectQueue } from '@nestjs/bullmq';
import { Queue } from 'bullmq';

export const QUEUE_AI_ANALYSIS = 'ai-analysis';
export const QUEUE_DOCUMENT_IMPORT = 'document-import';
export const QUEUE_NOTIFICATION = 'notification';

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

  constructor(
    @InjectQueue(QUEUE_AI_ANALYSIS) private readonly aiQueue: Queue,
    @InjectQueue(QUEUE_DOCUMENT_IMPORT) private readonly importQueue: Queue,
    @InjectQueue(QUEUE_NOTIFICATION) private readonly notifyQueue: Queue,
  ) {}

  async add(queueName: string, data: any) {
    const queue = this.getQueue(queueName);
    const job = await queue.add(queueName, data);
    this.logger.log(`Job ${job.id} added to ${queueName}`);
    return job;
  }

  async getJob(queueName: string, jobId: string) {
    const queue = this.getQueue(queueName);
    return queue.getJob(jobId);
  }

  private getQueue(name: string): Queue {
    switch (name) {
      case QUEUE_AI_ANALYSIS: return this.aiQueue;
      case QUEUE_DOCUMENT_IMPORT: return this.importQueue;
      case QUEUE_NOTIFICATION: return this.notifyQueue;
      default: throw new Error(`Unknown queue: ${name}`);
    }
  }
}