import ShutdownService from "./services/shutdown.service";
import express from "express";
import bodyParser from "body-parser";
import logger from "./utils/logger";

import { init } from "./service-init";
import { config } from "./utils/config";
import { metricsMiddleware } from "./middlewares/metrics.middleware";
import { rawBodyParser } from "./middlewares/rawBodyParser.middleware";
import { Server } from "http";

logger.info(`Starting application, environment ==> ${config.OGURY_ENV}`);

// Force timezone to UTC
process.env.TZ = config.TIMEZONE;

let server: Server;

export async function start() {
  const app = express();
  app.disable("etag");
  app.use(metricsMiddleware);
  app.use(rawBodyParser);
  app.use(bodyParser.json());

  try {
    await init(app);

    await new Promise<void>((resolve) => {
      server = app.listen(config.LISTEN_PORT, resolve);
      server.keepAliveTimeout = 61 * 1000;
      server.headersTimeout = 65 * 1000;
    });

    logger.info(`[EXPRESS] Listening on port ${config.LISTEN_PORT}`);

    ShutdownService.initShutdownHook();
    return app;
  } catch (err: any) {
    logger.error(err, "[APP] Failed to start server");
    process.exit(1);
  }
}

export function closeServer() {
  server.close();
}