/**
 * A simple socket.io server for performance benchmark
 *
 * Created by redism on 2014. 4. 22..
 */

var express = require('express'),
  http = require('http'),
  usage = require('usage'),
  argv = require('optimist').argv,
  SIO = require('socket.io');

var app = express();
var server = http.createServer(app);
var io = SIO.listen(server);

var port = argv.p || 8082;
var logLevel = argv.l || 1;
var connCount = 0;
server.listen(port);

io.set('log level', logLevel);
io.sockets.on('connection', function (socket) {
  connCount++;
  socket.on('echo', function (msg) {
    socket.emit('echo', msg);
  });
  socket.on('disconnect', function () {
    connCount--;
  });
});

var pid = process.pid;

console.log('Listening on port', port, ', log level', logLevel);

setInterval(function () {
  usage.lookup(pid, {keepHistory: true}, function (err, result) {
    var memInMb = result.memory / (1024 * 1024);
    var cpu = result.cpu;
    console.log('Conn:', connCount + ', Mem:', memInMb.toFixed(1) + ',cpu:', cpu);
  });
}, 1000);