//
//
//
"use strict";
const http = require('http');
const hmacsha1 = require('hmacsha1');
const port = Number(process.env.NODE_PORT);
const listenip = process.env.NODE_LISTEN_IP;
const secret = process.env.SECRET;
const ttl = Number(process.env.TTL);

function onRequest(request, response) {
  if (!request.headers['x-forwarded-user'] || request.headers['x-forwarded-user'].indexOf('Basic ') === -1) {
//	return response.status(401).json({ message: 'Missing Authorization Header' });
	console.log('Missing Authorization Header');
  } else {
	const base64Credentials =  request.headers['x-forwarded-user'].split(' ')[1];
	const credentials = Buffer.from(base64Credentials, 'base64').toString('ascii');
	var [httpusername, httppassword] = credentials.split(':');
  }
  var timestamp = Date.now() / 1000 | 0;
  var expiry = (timestamp + ttl).toString(10);
  var turnusername = expiry + ':' + httpusername;
  var username_sha1 = hmacsha1(secret, turnusername);
  var turnpassword = username_sha1;

  const data = JSON.stringify({
	username: turnusername,
	password: turnpassword,
	ttl: ttl,
	uris: [
//		"turn:turn.blorand.org:3478?transport=udp",
//		"turn:turn.blorand.org:3479?transport=tcp",
		"turns:turn.blorand.org:5349?transport=udp",
		"turns:turn.blorand.org:5350?transport=tcp"
	],
  })
  if (request.headers['x-forwarded-for'] == undefined) {
	var IP = request.connection.remoteAddress;
  } else {
	var IP = request.headers['x-forwarded-for'];
  }
  console.log('turnauthserver : Requête reçue de : ' + IP);
  response.statusCode = 200;
  response.setHeader('Content-Type', 'application/json');
  response.write(data);
  response.end();
}


http.createServer(onRequest).listen(port, listenip);
console.log(`turnauthserver running at http://${listenip}:${port}/`);