/**
 * @ngdoc directive
 * @name ionToggle
 * @module ionic
 * @codepen tfAzj
 * @restrict E
 *
 * @description
 * A toggle is an animated switch which binds a given model to a boolean.
 *
 * Allows dragging of the switch's nub.
 *
 * The toggle behaves like any [AngularJS checkbox](http://docs.angularjs.org/api/ng/input/input[checkbox]) otherwise.
 *
 * @param toggle-class {string=} Sets the CSS class on the inner `label.toggle` element created by the directive.
 *
 * @usage
 * Below is an example of a toggle directive which is wired up to the `airplaneMode` model
 * and has the `toggle-calm` CSS class assigned to the inner element.
 *
 * ```html
 * <ion-toggle ng-model="airplaneMode" toggle-class="toggle-calm">Airplane Mode</ion-toggle>
 * ```
 */
IonicModule
.directive('ionToggle', [
  '$ionicGesture',
  '$timeout',
function($ionicGesture, $timeout) {

  return {
    restrict: 'E',
    replace: true,
    require: '?ngModel',
    scope: {
      ngModel: '=?',
      ngValue: '=?',
      ngChecked: '=?',
      ngChange: '&',
      ngDisabled: '=?'
    },
    transclude: true,
    template: '<div class="item item-toggle">' +
                '<div ng-transclude></div>' +
                '<label class="toggle">' +
                  '<input type="checkbox" ng-model="ngModel" ng-value="ngValue" ng-change="ngChange()" ng-disabled="ngDisabled">' +
                  '<div class="track">' +
                    '<div class="handle"></div>' +
                  '</div>' +
                '</label>' +
              '</div>',

    compile: function(element, attr) {
      var input = element.find('input');
      if(attr.name) input.attr('name', attr.name);
      if(attr.ngChecked) input.attr('ng-checked', 'ngChecked');
      if(attr.ngTrueValue) input.attr('ng-true-value', attr.ngTrueValue);
      if(attr.ngFalseValue) input.attr('ng-false-value', attr.ngFalseValue);
      if(attr.toggleClass) {
        element[0].getElementsByTagName('label')[0].classList.add(attr.toggleClass);
      }

      return function($scope, $element, $attr) {
         var el, checkbox, track, handle;

         el = $element[0].getElementsByTagName('label')[0];
         checkbox = el.children[0];
         track = el.children[1];
         handle = track.children[0];

         var ngModelController = angular.element(checkbox).controller('ngModel');

         $scope.toggle = new ionic.views.Toggle({
           el: el,
           track: track,
           checkbox: checkbox,
           handle: handle,
           onChange: function() {
             if(checkbox.checked) {
               ngModelController.$setViewValue(true);
             } else {
               ngModelController.$setViewValue(false);
             }
             $scope.$apply();
           }
         });

         $scope.$on('$destroy', function() {
           $scope.toggle.destroy();
         });
      };
    }

  };
}]);