// Copyright 2014 The Oppia Authors. All Rights Reserved.
//
// 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.

// This is a copy of the UnicodeStringEditor.

oppia.directive('normalizedStringEditor', [
    '$compile', 'OBJECT_EDITOR_URL_PREFIX',
    function($compile, OBJECT_EDITOR_URL_PREFIX) {
  return {
    link: function(scope, element) {
      scope.getTemplateUrl = function() {
        return OBJECT_EDITOR_URL_PREFIX + 'NormalizedString';
      };
      $compile(element.contents())(scope);
    },
    restrict: 'E',
    scope: true,
    template: '<span ng-include="getTemplateUrl()"></span>',
    controller: function($scope) {
      $scope.alwaysEditable = $scope.$parent.alwaysEditable;
      $scope.largeInput = false;

      $scope.$watch('$parent.initArgs', function(newValue) {
        $scope.largeInput = false;
        if (newValue && newValue.largeInput) {
          $scope.largeInput = newValue.largeInput;
        }
      });

      // Reset the component each time the value changes (e.g. if this is part
      // of an editable list).
      $scope.$watch('$parent.value', function() {
        $scope.localValue = {
          label: $scope.$parent.value || ''
        };
      }, true);

      if ($scope.alwaysEditable) {
        $scope.$watch('localValue.label', function(newValue) {
          $scope.$parent.value = newValue;
        });
      } else {
        $scope.openEditor = function() {
          $scope.active = true;
        };

        $scope.closeEditor = function() {
          $scope.active = false;
        };

        $scope.replaceValue = function(newValue) {
          $scope.localValue = {
            label: newValue
          };
          $scope.$parent.value = newValue;
          $scope.closeEditor();
        };

        $scope.$on('externalSave', function() {
          if ($scope.active) {
            $scope.replaceValue($scope.localValue.label);
            // The $scope.$apply() call is needed to propagate the replaced
            // value.
            $scope.$apply();
          }
        });

        $scope.closeEditor();
      }
    }
  };
}]);
