// src/services/queueService.server.ts
import { logger } from './logger.server';
import { connection } from './redis.server';
import {
  flyerQueue,
  emailQueue,
  analyticsQueue,
  weeklyAnalyticsQueue,
  cleanupQueue,
  tokenCleanupQueue,
} from './queues.server';

// Re-export everything for backward compatibility where possible
export { connection } from './redis.server';
export * from './queues.server';

// We do NOT export workers here anymore to prevent side effects.
// Consumers needing workers must import from './workers.server'.

/**
 * A function to gracefully shut down all queues and connections.
 * This is for the API process which only uses queues.
 * For worker processes, use the gracefulShutdown from workers.server.ts
 */
export const gracefulShutdown = async (signal: string) => {
  logger.info(`[Shutdown] Received ${signal}. Closing all queues...`);
  let exitCode = 0; // Default to success

  const resources = [
    { name: 'flyerQueue', close: () => flyerQueue.close() },
    { name: 'emailQueue', close: () => emailQueue.close() },
    { name: 'analyticsQueue', close: () => analyticsQueue.close() },
    { name: 'cleanupQueue', close: () => cleanupQueue.close() },
    { name: 'weeklyAnalyticsQueue', close: () => weeklyAnalyticsQueue.close() },
    { name: 'tokenCleanupQueue', close: () => tokenCleanupQueue.close() },
    { name: 'redisConnection', close: () => connection.quit() },
  ];

  const results = await Promise.allSettled(resources.map((r) => r.close()));

  results.forEach((result, index) => {
    if (result.status === 'rejected') {
      logger.error(
        { err: result.reason, resource: resources[index].name },
        `[Shutdown] Error closing resource.`,
      );
      exitCode = 1; // Mark shutdown as failed
    }
  });

  if (exitCode === 0) {
    logger.info('[Shutdown] All queues and connections closed successfully.');
  } else {
    logger.warn('[Shutdown] Graceful shutdown completed with errors.');
  }

  process.exit(exitCode);
};