const MODULE_NAME = 'CORE-CALLBACK';

  const DEFAULT_LISTENER_FROM_CORE = 25613;
  
  const express = require('express');
  const config = require('komodo-sdk/config');

  const logger = require('tektrans-logger');

  const middlewareCommon = require('../middlewares/common');
  const sender = require('./sender');

  const dumperReq = require('./dumper/req');

  const matrix = require('../matrix');

  const app = express();
  
  app.use(express.json({ extended: true }));
  app.use(express.urlencoded({ extended: true }));
  
  app.use((req, res, next) => {

      res.locals.httpgetx_subsystem = MODULE_NAME;

      next();
  });
  
  app.use(middlewareCommon);

  app.use(dumperReq);

  
  app.use((req, res) => {

      matrix.core.received += 1;

      res.end('OK');

  
      const data = req.method === 'GET' ? req.query : req.body;
      sender(data, res.locals.xid);

  });
  
  const port = (config.listener && config.listener.core && config.listener.core.port)
      || DEFAULT_LISTENER_FROM_CORE;

  const server = app.listen(port, () => {
      logger.info(`${MODULE_NAME} 0375DC4E: Listen from CORE callback`, { port: server.address().port });

  }).on('error', (e) => {

      logger.error(`${MODULE_NAME} A90E42D5: Can not listen CORE callback on port ${port}. ${e.toString()}`);

      process.exit(1);
  });