var fs = require('fs');
var crypto = require('crypto');

var Steam = require('steam');
var SteamWebLogOn = require('steam-weblogon');
var getSteamAPIKey = require('steam-web-api-key');
var SteamTradeOffers = require('../'); // change to 'steam-tradeoffers' if not running from the examples subdirectory

var admin = ''; // put your steamid here so the bot can send you trade offers

var logOnOptions = {
  account_name: '',
  password: '',
  auth_code: ''
};

//var authCode = ''; // code received by email

try {
  logOnOptions['sha_sentryfile'] = getSHA1(fs.readFileSync('sentry'));
} catch (e) {
  if (authCode != '') {
    logOnOptions['auth_code'] = authCode;
  }
}

// if we've saved a server list, use it
if (fs.existsSync('servers')) {
  Steam.servers = JSON.parse(fs.readFileSync('servers'));
}

var steamClient = new Steam.SteamClient();
var steamUser = new Steam.SteamUser(steamClient);
var steamFriends = new Steam.SteamFriends(steamClient);
var steamWebLogOn = new SteamWebLogOn(steamClient, steamUser);
var offers = new SteamTradeOffers();

steamClient.connect();
steamClient.on('connected', function() {
  steamUser.logOn(logOnOptions);
});

steamClient.on('logOnResponse', function(logonResp) {
  if (logonResp.eresult == Steam.EResult.OK) {
    console.log('Logged in!');
    steamFriends.setPersonaState(Steam.EPersonaState.Online);

    steamWebLogOn.webLogOn(function(sessionID, newCookie){
      getSteamAPIKey({
        sessionID: sessionID,
        webCookie: newCookie
      }, function(err, APIKey) {
        offers.setup({
          sessionID: sessionID,
          webCookie: newCookie,
          APIKey: APIKey
        }, function() {
          offers.loadMyInventory({
            appId: 730,
            contextId: 2
          }, function(err, items) {
            var item;
            // picking first tradable item
            for (var i = 0; i < items.length; i++) {
              if (items[i].tradable) {
                item = items[i];
                break;
              }
            }
            // if there is such an item, making an offer with it
            if (item) {
              offers.makeOffer ({
                partnerSteamId: admin,
                itemsFromMe: [
                  {
                    appid: 730,
                    contextid: 2,
                    amount: 1,
                    assetid: item.id
                  }
                ],
                itemsFromThem: [],
                message: 'CSGOClutch | Testing bot and trading'
              }, function(err, response){
                if (err) {
                  throw err;
                }
                offers.acceptOffer({tradeOfferId: response['tradeofferid']});
              });
            }
          });
        });
      });
    });
  }
});

steamClient.on('servers', function(servers) {
  fs.writeFile('servers', JSON.stringify(servers));
});

steamUser.on('updateMachineAuth', function(sentry, callback) {
  fs.writeFileSync('sentry', sentry.bytes);
  callback({ sha_file: getSHA1(sentry.bytes) });
});

function getSHA1(bytes) {
  var shasum = crypto.createHash('sha1');
  shasum.end(bytes);
  return shasum.read();
}