// Reference: https://hub.packtpub.com/making-simple-web-based-ssh-client-using-nodejs-and-socketio/

var express = require('express');
var https = require('https');
var http = require('http');
var fs = require('fs');
var pty = require('node-pty');

// Set port
var port = 9774;

// Set up express server
let app = express();

// Set HTTP server root folder
app.use("/", express.static("./"));

// Creating an HTTP server
var server = http.createServer(app).listen(port);
console.log(`Listening on port ${port}`);

var io = require('socket.io')(server);

// When a new socket connects
io.on('connection', function (socket) {
  console.log('Client connect');
  // Create terminal
  var term = pty.spawn('sh', [], {
    name: 'xterm-color',
    cols: 80,
    rows: 30,
    cwd: process.env.HOME,
    env: process.env
  });
  // Listen on the terminal for output and send it to the client
  term.on('data', function (data) {
    socket.emit('output', data);
  });
  // Listen on the client and send any input to the terminal
  socket.on('input', function (data) {
    term.write(data);
  });
  // When socket disconnects, destroy the terminal
  socket.on("disconnect", function () {
    term.destroy();
    console.log("Client disconnect");
  });
});