'use strict';

(function () {

  /**
   * Creates the angular application.
   */
  angular.module('drone', [
    'ngRoute',
    'ui.filters',
    'ui.router'
  ]);

  /**
   * Bootstraps the application and retrieves the
   * token from the
   */
  function Authorize() {
    // First, parse the query string
    var params = {}, queryString = location.hash.substring(1),
      regex = /([^&=]+)=([^&]*)/g, m;

    // Loop through and retrieve the token
    while (m = regex.exec(queryString)) {
      params[decodeURIComponent(m[1])] = decodeURIComponent(m[2]);
    }

    // if the user has just received an auth token we
    // should extract from the URL, save to local storage
    // and then remove from the URL for good measure.
    if (params.access_token) {
      localStorage.setItem("access_token", params.access_token);
      history.replaceState({}, document.title, location.pathname);
    }
  }

  /**
   * Defines the route configuration for the
   * main application.
   */
  function Config($stateProvider, $httpProvider, $locationProvider) {

    // Resolver that will attempt to load the currently
    // authenticated user prior to loading the page.
    var resolveUser = {
      user: function (users) {
        return users.getCached();
      }
    };

    $stateProvider
      .state('app', {
        abstract: true,
        views: {
          'layout': {
            templateUrl: '/static/scripts/views/layout.html',
            controller: function ($scope, $routeParams, repos, users) {
              users.getCached().then(function (payload) {
                $scope.user = payload.data;
              });
            }
          }
        }
      })
      .state('app.index', {
        url: '/',
        views: {
          'toolbar': {
            templateUrl: '/static/scripts/views/repos/index/toolbar.html'
          },
          'content': {
            templateUrl: '/static/scripts/views/repos/index/content.html',
            controller: 'ReposCtrl',
            resolve: resolveUser
          }
        },
        title: 'Dashboard'
      })
      .state('login', {
        url: '/login',
        views: {
          'layout': {
            templateUrl: '/static/scripts/views/login.html',
            controller: 'UserLoginCtrl',
            resolve: resolveUser
          }
        },
        title: 'Login'
      })
      .state('app.profile', {
        url: '/profile',
        views: {
          'toolbar': {templateUrl: '/static/scripts/views/profile/toolbar.html'},
          'content': {
            templateUrl: '/static/scripts/views/profile/content.html',
            controller: 'UserCtrl',
            resolve: resolveUser
          }
        },
        title: 'Profile'
      })
      .state('app.users', {
        url: '/users',
        views: {
          'toolbar': {templateUrl: '/static/scripts/views/users/toolbar.html'},
          'content': {
            templateUrl: '/static/scripts/views/users/content.html',
            controller: 'UsersCtrl',
            resolve: resolveUser
          }
        },
        title: 'Users'
      })
      .state('app.builds', {
        url: '/:owner/:name',
        views: {
          'toolbar': {
            templateUrl: '/static/scripts/views/builds/index/toolbar.html',
            controller: 'UserHeaderCtrl',
            resolve: resolveUser
          },
          'content': {
            templateUrl: '/static/scripts/views/builds/index/content.html',
            controller: 'BuildsCtrl'
          }
        },
        title: 'Builds'
      })
      .state('app.repo_edit', {
        url: '/:owner/:name/edit',
        views: {
          'toolbar': {
            templateUrl: '/static/scripts/views/repos/toolbar.html',
            controller: 'UserHeaderCtrl',
            resolve: resolveUser
          },
          'content': {
            templateUrl: '/static/scripts/views/repos/edit.html',
            controller: 'RepoEditCtrl',
            resolve: resolveUser
          }
        },
        title: 'Edit Repository'
      })
      .state('app.repo.env', {
        url: '/:owner/:name/edit/env',
        views: {
          'toolbar': {templateUrl: '/static/scripts/views/repos/toolbar.html'},
          'content': {templateUrl: '/static/scripts/views/repos/env.html'}
        },
        controller: 'RepoEditCtrl',
        resolve: resolveUser
      })
      .state('app.repo.del', {
        url: '/:owner/:name/delete',
        views: {
          'toolbar': {templateUrl: '/static/scripts/views/repos/toolbar.html'},
          'content': {templateUrl: '/static/scripts/views/repos/del.html'}
        },
        controller: 'RepoEditCtrl',
        resolve: resolveUser
      })
      .state('app.build', {
        url: '/:owner/:name/:number',
        views: {
          'toolbar': {
            templateUrl: '/static/scripts/views/builds/show/toolbar.html',
            controller: 'UserHeaderCtrl',
            resolve: resolveUser
          },
          'content': {
            templateUrl: '/static/scripts/views/builds/show/content.html',
            controller: 'BuildOutCtrl',
            resolve: resolveUser
          }
        },
        title: 'Build'
      })
      .state('app.job', {
        url: '/:owner/:name/:number/:step',
        views: {
          'toolbar': {
            templateUrl: '/static/scripts/views/builds/show/toolbar.html',
            controller: 'UserHeaderCtrl',
            resolve: resolveUser
          },
          'content': {
            templateUrl: '/static/scripts/views/builds/show/content.html',
            controller: 'BuildOutCtrl',
            resolve: resolveUser
          }
        },
        title: 'Build'
      });

    // Enables html5 mode
    $locationProvider.html5Mode(true);

    // Appends the Bearer token to authorize every
    // outbound http request.
    $httpProvider.defaults.headers.common.Authorization = 'Bearer ' + localStorage.getItem('access_token');

    // Intercepts every oubput http response and redirects
    // the user to the logic screen if the request was rejected.
    $httpProvider.interceptors.push(function ($q, $location) {
      return {
        'responseError': function (rejection) {
          if (rejection.status === 401 && rejection.config.url !== "/api/user") {
            $location.path('/login');
          }
          if (rejection.status === 0) {
            // this happens when the app is down or
            // the browser loses internet connectivity.
          }
          return $q.reject(rejection);
        }
      };
    });
  }

  function RouteChange($rootScope, repos, logs) {
    $rootScope.$on('$stateChangeStart', function () {
      repos.unsubscribe();
      logs.unsubscribe();
    });

    $rootScope.$on('$stateChangeSuccess', function (event, current) {
      if (current.title) {
        document.title = current.title + ' · drone';
      }
    });
  }

  angular
    .module('drone')
    .config(Authorize)
    .config(Config)
    .run(RouteChange);

})();