require("dotenv").config(!!process.env.CONFIG ? { path: process.env.CONFIG } : {});
var express = require("express");
var bodyParser = require("body-parser");
var http = require("http");
var AccessToken = require('livekit-server-sdk').AccessToken;
var cors = require("cors");
var app = express();

// Environment variable: PORT where the node server is listening
var SERVER_PORT = process.env.SERVER_PORT || 5000;
// Environment variable: api key shared with our LiveKit deployment
var LIVEKIT_API_KEY = process.env.LIVEKIT_API_KEY || 'devkey';
// Environment variable: api secret shared with our LiveKit deployment
var LIVEKIT_API_SECRET = process.env.LIVEKIT_API_SECRET || 'secret';

// Enable CORS support
app.use(
  cors({
    origin: "*",
  })
);

var server = http.createServer(app);

// Allow application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({ extended: true }));
// Allow application/json
app.use(bodyParser.json());

// Serve static resources if available
app.use(express.static(__dirname + '/public'));

// Serve application
server.listen(SERVER_PORT, () => {
  console.log("Application started on port: ", SERVER_PORT);
});

app.post('/getToken', (req, res) => {
  const roomName = req.body.roomName;
  const participantName = req.body.participantName;
  const at = new AccessToken(LIVEKIT_API_KEY, LIVEKIT_API_SECRET, { identity: participantName });
  at.addGrant({ roomJoin: true, room: roomName });
  const token = at.toJwt();
  res.send(token);
});

process.on('uncaughtException', err => console.error(err));