var http = require('http');
var Engine = require('engine.io-stream');
var browserify = require('browserify');

var level = require('level');
var multilevel = require('multilevel');
var liveStream = require('level-live-stream');

// webrtc
var webrtc = require('wrtc');
var pc = null;
var offer = null;
var answer = null;

/* 1. Global settings, data and functions. */
var dataChannelSettings = {
  'reliable': {
        ordered: true,
        maxRetransmits: 0
      },
};

var pcSettings = [
  {
    iceServers: [{url:'stun:stun.l.google.com:19302'}]
  },
  {
    'optional': [{DtlsSrtpKeyAgreement: false}]
  }
];

var pendingDataChannels = {};
var dataChannels = {};

var server = http.createServer(function (req, res) {
  if (req.url == '/') {
    res.end('<script src="/bundle.js"></script>');
  } else if (req.url == '/bundle.js') {
    browserify(__dirname + '/browser.js')
      .bundle({debug: true})
      .pipe(res);
  } else {
    res.end('Oops');
  }
}).listen(5000);

var db = level(__dirname + '/db', {
  valueEncoding: 'json'
});

liveStream.install(db);
multilevel.writeManifest(db, __dirname + '/manifest.json');

var multistream = multilevel.server(db);
var engine = Engine(function (con) {
  con.pipe(multistream).pipe(con);
});
engine.attach(server, '/engine');