const MODULE_NAME = 'PARTNER-LISTENER.ROUTER.TOPUP';

  const express = require('express');
  
  const config = require('komodo-sdk/config');
  const logger = require('komodo-sdk/logger');
  const coreapi = require('komodo-sdk/coreapi');
  // const coreapi = require('../../coreapi');

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

  
  const router = express.Router();
  module.exports = router;
  
  function onInvalidParameter(missingParameter, req, res) {

      logger.verbose(`${MODULE_NAME} 1536D577: Undefined ${missingParameter} parameter`, {

          xid: res.locals.xid,
          ip: req.ip,
          terminal_name: req.body.terminal_name || req.query.terminal_name,
          request_id: req.body.request_id || req.query.request_id,
          product_name: req.body.product_name || req.query.product_name,
          destination: req.body.destination || req.query.destination,
      });
      res.end('INVALID REQUEST');
  }
  
  function pagePrerequisite(req, res, next) {
      if (!req.body) req.body = {};
  
      if (!req.body.terminal_name && !req.query.terminal_name) {
          onInvalidParameter('terminal_name', req, res);
          return;
      }
  
      if (!req.body.password && !req.query.password) {
          onInvalidParameter('password', req, res);
          return;
      }
  
      if (!req.body.request_id && !req.query.request_id) {
          onInvalidParameter('request_id', req, res);
          return;
      }
  
      if (!req.body.product_name && !req.query.product_name) {
          onInvalidParameter('product_name', req, res);
          return;
      }
  
      if (!req.body.destination && !req.query.destination) {
          onInvalidParameter('destination', req, res);
          return;
      }
  
      next();
  }
  
  async function pageIndex(req, res) {

      const { xid } = res.locals;

      const terminalName = `${req.body.terminal_name || req.query.terminal_name}@${req.ip.replace(/^::ffff:/, '')}`;

      matrix.core.sent += 1;

      const [err, coreResponse] = await coreapi({

          xid,

          path: '/prepaid/buy',
          qs: {
              terminal_name: terminalName,
              password: req.body.password || req.query.password,
              request_id: req.body.request_id || req.query.request_id,
              product_name: req.body.product_name || req.query.product_name,
              destination: req.body.destination || req.query.destination,
              origin: config.name || 'HTTPGETX',

              report_ip: config.listener.core.ip || null,
              report_port: config.listener.core.port,

              reverse_url: req.body.reverse_url || req.query.reverse_url || null,
          },
      });

      if (err || !coreResponse) {

          matrix.core.sent_failed += 1;
          matrix.core.last_error = {
              xid,
              ts: new Date(),
              e: err,
              eCode: err.code,
              eMessage: err.message,
          };

          logger.warn(`${MODULE_NAME} 8DEBE15F: ERROR on /prepaid/buy response`, {
              xid,
              err,
              coreResponseTypeof: typeof coreResponse,
              coreResponse,

          });
          res.end('INVALID CORE RESPONSE');
          return;
      }

      logger.verbose(`${MODULE_NAME} 2528A9B4: Got CORE response`, {
          xid,
          coreResponse,
      });
  
      const responseToPartner = {
          httpgetx_xid: xid,
          request_id: coreResponse.request_id,
          transaction_id: coreResponse.transaction_id,
          transaction_date: coreResponse.transaction_date,
          store_name: coreResponse.store_name,
          terminal_name: coreResponse.terminal_name,
          product_name: coreResponse.product_name,
          destination: coreResponse.destination,
          rc: coreResponse.rc,

          sn: coreResponse.sn || undefined,

          amount: Number(coreResponse.amount) || undefined,
          ending_balance: Number(coreResponse.ending_balance) || undefined,

          message: coreResponse.message,
      };
  
      res.json(responseToPartner);

  }

  // router.all('/', (req, res) => { res.status(404).end('404: Not implemented yet'); });

  router.get('/', pagePrerequisite, pageIndex);