import { Queue, Worker } from 'bullmq';
import { redisConnection } from '../config/redis';
import { automationEngine } from '../automation/engine';
import { db, and, eq, lte, scheduledMessages } from '@autoloop/db';

export const cronQueue = new Queue('cron-tasks', {
  connection: redisConnection,
});

export const initScheduler = async () => {
  // Add a repeatable job to poll for scheduled messages every minute
  await cronQueue.add('poll-scheduled-messages', {}, {
    repeat: { pattern: '* * * * *' },
    removeOnComplete: true,
  });

  const worker = new Worker(
    'cron-tasks',
    async (job) => {
      if (job.name === 'poll-scheduled-messages') {
        console.log('[Scheduler] Polling for scheduled messages...');
        const now = new Date();
        const due = await db.query.scheduledMessages.findMany({
          where: and(
            eq(scheduledMessages.status, 'pending'),
            lte(scheduledMessages.dueAt, now)
          ),
          limit: 50,
        });

        for (const msg of due) {
          // Add to processing queue
          await automationEngine.processScheduledMessage(msg.id);
        }
      }
    },
    { connection: redisConnection }
  );

  return worker;
};