import { Queue } from "bullmq";
import { getRedisConnection } from "./redis";
import type { QCLine, QCModule } from "../qc/types";

export interface QCJobData {
  jobId: string;
  filename: string;
  lines: QCLine[];
  language: string;
  module: QCModule;
  deliverableType: string;
  priority?: number; // 1 = urgent, 5 = normal (default)
}

let qcQueue: Queue<QCJobData> | null = null;

export function getQCQueue(): Queue<QCJobData> {
  if (qcQueue) return qcQueue;

  qcQueue = new Queue<QCJobData>("qc-pipeline", {
    connection: getRedisConnection(),
    defaultJobOptions: {
      attempts: 3,
      backoff: { type: "exponential", delay: 30000 },
      removeOnComplete: { count: 1000 },
      removeOnFail: { count: 5000 },
    },
  });

  return qcQueue;
}

export async function enqueueQCJob(data: QCJobData): Promise<string> {
  const queue = getQCQueue();
  const job = await queue.add("qc-run", data, {
    priority: data.priority || 5,
    jobId: `qc-${data.jobId}`,
  });
  console.log(`[QC:queue] Enqueued job ${job.id} for ${data.filename} (${data.lines.length} lines, priority=${data.priority || 5})`);
  return job.id!;
}