(function () {
  'use strict';

  angular
    .module('eva2-angular')
    .directive('evaInvalidCredentialsValidator', function ($rootScope) {
      return {
        require: 'ngModel',
        link: function (scope, el, attr, ctrl) {
          var onInvalidCredentials = function (event, message) {
            ctrl.$setValidity('invalidCredentials', false);
            ctrl.invalidCredentialsError = message.data.message;
          };
          var onDestroy = function () {
            invalidCredentialsHandler();
          };
          var invalidCredentialsHandler = $rootScope.$on('authentication:login-failed', onInvalidCredentials);
          ctrl.$validators.invalidCredentials = function (value) {
            return true;
          };

          scope.$on('$destroy', onDestroy);
        }
      };
    });

  angular
    .module('eva2-angular')
    .controller('LoginCtrl', LoginCtrl);

  LoginCtrl.$inject = ['$scope', '$state', 'ApiAuthentication', 'CurrentUser'];

  function LoginCtrl($scope, $state, ApiAuthentication, CurrentUser) {

    var handleSuccessAndRedirect = function () {
      $scope.error = false;
      if (CurrentUser && CurrentUser.domains && CurrentUser.domains.length === 1) { // If there's only one, we pick that, otherwise go to assignment switcher
        $state.go('assignment.jobs', { domain: CurrentUser.domains[0] });
      } else {
        $state.go('assignments');
      }
    };

    var handleError = function () {
      $scope.error = true;
    };

    var setLoadingToFalse = function () {
      $scope.loading = false;
    };

    $scope.login = function () {
      $scope.loading = true;
      ApiAuthentication.login($scope.login.username, $scope.login.password)
      .then(handleSuccessAndRedirect)
      .catch(handleError)
      .finally(setLoadingToFalse);
    };
  }

})();