var co = require('co');

var CloudController = {
  getInfo: function() {
    console.log('get infomation');
    return new Promise(function(reslove, reject) {
      setTimeout(function() {
        reslove({
          authorization_endpoint: ''
        });
      }, 0);
    });
  }
}

var UsersUAA = {
  login: function(username, password) {
    console.log('login with ' + username);
    return new Promise(function(reslove, reject) {
      setTimeout(function() {
        reslove('');
      }, 0);
    });
  },
  setEndPoint: function() { }
}

var Apps = {
  getApps: function() {
    console.log('get applications');
    return new Promise(function(reslove, reject) {
      setTimeout(function() {
        reslove('got apps');
      }, 0);
    });
  },
  setToken: function() {}
};

var username = 'tiven',
    password = 'password';

co(function *() {
  console.log('start get cloud apps')
  var result = yield CloudController.getInfo();
  UsersUAA.setEndPoint(result.authorization_endpoint);
  result = yield UsersUAA.login(username, password);
  Apps.setToken(result);
  result = yield Apps.getApps();
  console.log(result);
}).catch(onerror);

function onerror(err) {
  // log any uncaught errors
  // co will not throw any errors you do not handle!!!
  // HANDLE ALL YOUR ERRORS!!!
  console.error(err.stack);
}