"use strict";
  
  /**
   * Modul untuk menerima callback dari modem handler jika ada SMS masuk.
   */
  
  
  const express = require('express');

  const moment = require('moment');

  
  const messagingService = require('komodo-center-messaging-client-lib');
  
  const config = require('komodo-sdk/config');
  const logger = require('komodo-sdk/logger');

  const transport = require('../transport');
  const partnerLastSeen = require('../partner-last-seen');
  const history = require('../history');

  
  const app = express();
  messagingService.setTransport(transport);
  
  function apikeyChecker(req, res, next) {
      res.locals.has_valid_apikey = req.params.apikey === config.handler_callback_server.apikey;
      if (res.locals.has_valid_apikey) {
          next();
      }
      else {

          res.end('APISERVER: Invalid apikey');

      }
  }
  
  function onIncomingSms(req, res) {
      res.end('OK');

  
      if (!req.query.number) return;
      if (req.query.number.indexOf('+') !== 0) return;

  
      const numberWithSuffix = req.query.number.replace(/^\+/, '') + (config.number_suffix || '');

      partnerLastSeen.set(req.query.number, req.query.modem);

      history.push({
          ts: req.query.ts || moment().format('YYYY-MM-DD HH:mm:ss'),
          modem: {
              name: req.query.modem,
              imsi: req.query.modem_imsi,
              msisdn: req.query.modem_msisdn,
          },
          direction: 'INCOMING',
          partner: req.query.number,
          message: req.query.msg,
      });
  
      logger.info('APISERVER: Incoming SMS', { modem: req.query.modem, from: req.query.number, from_with_suffix: numberWithSuffix, msg: req.query.msg });

      messagingService.onIncomingMessage({
          me: req.query.modem,
          partner: numberWithSuffix,
          msg: req.query.msg
      })
  }

  function pageHistory(req, res) {
      res.json((history.dump() || []).reverse());
  }

  app.use(function(req, res, next) {

      logger.verbose('APISERVER: Incoming http request', { ip: req.ip, url: req.url });

      next();
  })

  app.use('/apikey/:apikey', apikeyChecker);
  app.get('/apikey/:apikey/on-sms', onIncomingSms);
  app.get('/apikey/:apikey/inbox', onIncomingSms);
  app.get('/apikey/:apikey/on-sms/inbox', onIncomingSms);

  app.get('/apikey/:apikey/history', pageHistory);

  
  const listenPort = config && config.handler_callback_server ? config.handler_callback_server.listen_port : null;
  listenPort && app.listen(listenPort, () => {
      logger.info('HTTP Handler Callback server listening on port ' + listenPort);
  })