// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.

define([
  'app',
  'api',
  'addons/auth/routes'
],

function (app, FauxtonAPI, Auth) {

  Auth.session = new Auth.Session();
  FauxtonAPI.setSession(Auth.session);
  app.session = Auth.session;

  Auth.initialize = function () {

    FauxtonAPI.addHeaderLink({
      id: 'auth',
      title: 'Login',
      href: '#login',
      icon: 'fonticon-user',
      bottomNav: true
    });

    Auth.session.on('change', function () {
      var session = Auth.session;
      var link = {};

      if (session.isAdminParty()) {
        link = {
          id: 'auth',
          title: 'Admin Party!',
          href: '#createAdmin',
          icon: 'fonticon-user',
          bottomNav: true
        };
      } else if (session.isLoggedIn()) {
        link = {
          id: 'auth',
          title: session.user().name,
          href: '#changePassword',
          icon: 'fonticon-user',
          bottomNav: true
        };

        // ensure the footer link is removed before adding it
        FauxtonAPI.removeHeaderLink({ id: 'logout', footerNav: true });
        FauxtonAPI.addHeaderLink({
          id: 'logout',
          footerNav: true,
          href: '#logout',
          title: 'Logout',
          icon: '',
          className: 'logout'
        });
      } else {
        link = {
          id: 'auth',
          title: 'Login',
          href: '#login',
          icon: 'fonticon-user',
          bottomNav: true
        };
        FauxtonAPI.removeHeaderLink({ id: 'logout', footerNav: true });
      }
      FauxtonAPI.updateHeaderLink(link);
    });

    Auth.session.fetchUser().then(function () {
      Auth.session.trigger('change');
    });

    var auth = function (session, roles) {
      var deferred = $.Deferred();

      if (session.isAdminParty()) {
        session.trigger('authenticated');
        deferred.resolve();
      } else if (session.matchesRoles(roles)) {
        session.trigger('authenticated');
        deferred.resolve();
      } else {
        deferred.reject();
      }

      return [deferred];
    };

    var authDenied = function () {
      var url = window.location.hash.replace('#', '');
      var pattern = /login\?urlback=/g;

      if (pattern.test(url)) {
        url = url.replace('login?urlback=', '');
      }
      FauxtonAPI.navigate('/login?urlback=' + url, { replace: true });
    };

    FauxtonAPI.auth.registerAuth(auth);
    FauxtonAPI.auth.registerAuthDenied(authDenied);
  };

  return Auth;
});