import { Processor, Process, InjectQueue } from '@nestjs/bull';
import { Job, Queue } from 'bull';
import { Logger } from '@nestjs/common';
import { InvoicesService } from './invoice.service';

@Processor('invoice-bulk-queue')
export class BulkUploadProcessor {
  private readonly logger = new Logger(BulkUploadProcessor.name);

  constructor(
    private readonly invoicesService: InvoicesService,
    @InjectQueue('invoice-bulk-queue') private readonly bulkQueue: Queue,
  ) {}

  @Process('process-zip')
  async handleBulkZip(job: Job<{ filePath: string, companyId: string, tenantId: string }>) {
    const { filePath, companyId, tenantId } = job.data;
    this.logger.log(`Processing bulk ZIP: ${filePath} for Company: ${companyId}`);

    // TODO: Implement ZIP extraction (adm-zip or unzipper)
    // TODO: For each file in ZIP:
    // 1. Calculate Hash (MD5/SHA256)
    // 2. Check Redis SMEMBERS to prevent duplicate processing
    // const hash = 'calculated_file_hash';
    // const exists = await this.bulkQueue.client.sismember(`company:${companyId}:invoice-hashes`, hash);
    // if (exists) return;
    
    // 3. Save hash and trigger individual processing
    // await this.bulkQueue.client.sadd(`company:${companyId}:invoice-hashes`, hash);
    // await this.invoicesService.processSingleFile(fileInZip, tenantId, companyId);
  }
}