// @see https://github.com/zeit/next.js/tree/master/examples/custom-server
// @see https://gist.github.com/edolyne/10bf9cfdd1e75557c3c4c63a2c1fc0b5

const express = require('express');
const next = require('next');
const axios = require('axios');
const fs = require("fs");

const port = parseInt(process.env.PORT, 10) || 3000;
const dev = process.env.NODE_ENV !== 'production';
const app = next({ dev });
const handle = app.getRequestHandler();

const { DESTINATION, createSitemap } = require("./sitemap");

app.prepare()
  .then(() => {
    const server = express();

    // ... some config based on your app
  
    // This `server.get()` lets you generate a sitemap on the fly and retrive it from http://your.domain/sitemap.xml
    // It also create a file if you need to open it with your editor.
    server.get("/sitemap.xml", function(req, res) {
      res.header("Content-Type", "application/xml");
      (async function sendXML() {
        let xmlFile = await createSitemap();
        // Send it to the browser
        res.send(xmlFile);
        // Create a file on the selected destination
        fs.writeFileSync(DESTINATION, xmlFile);
      })();
    });
  
    // ... some config based on your app
  
    // This below is the default config. 
    // You might have a different one base on your app based on your app
    server.get('*', (req, res) => {
      const pathname = req.originalUrl.substr(1);
      return handle(req, res)
    });
    server.listen(port, (err) => {
      if (err) throw err
      console.log(`> Ready on http://localhost:${port}`)
    });
  });