/**
 * @fileoverview Process entrypoint: HTTP listen + optional in-process poller.
 * @module index
 */

import { createApp } from './app.js';
import { config } from './config.js';
import { createDebugger } from './debug/logger.js';
import { startInProcessJobPoller } from './workers/inProcessJobPoller.js';
import { connectNats, ensureStreams } from './nats/connection.js';
import { startJobPollerWorker } from './workers/jobPollerWorker.js';
import { startWebhookWorker } from './workers/webhookWorker.js';

const log = createDebugger('app');

/**
 * Start the HTTP server and background workers.
 * @returns {import('http').Server}
 */
export function startServer() {
  const app = createApp();

  if (config.natsEnabled) {
    connectNats()
      .then(({ jsm }) => ensureStreams(jsm))
      .then(() => Promise.all([startJobPollerWorker(), startWebhookWorker()]))
      .then(() => log.info('NATS workers started'))
      .catch((err) => log.error('NATS worker start failed', { error: err.message }));
  } else {
    startInProcessJobPoller();
  }

  const server = app.listen(config.port, config.host, () => {
    log.info('middleware listening', {
      host: config.host,
      port: config.port,
      veraeApiBaseUrl: config.veraeApiBaseUrl,
      mockVerae: config.mockVerae,
      natsEnabled: config.natsEnabled,
    });
    // eslint-disable-next-line no-console
    console.log(
      `Verae Zapier middleware listening on http://${config.host}:${config.port}`,
    );
  });
  return server;
}

if (process.argv[1]?.includes('index.js')) {
  startServer();
}