/**
 * @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', [
  '$timeout',
  '$ionicConfig',
function($timeout, $ionicConfig) {

  return {
    restrict: 'E',
    replace: true,
    require: '?ngModel',
    transclude: true,
    template:
      '<div class="item item-toggle">' +
        '<div ng-transclude></div>' +
        '<label class="toggle">' +
          '<input type="checkbox">' +
          '<div class="track">' +
            '<div class="handle"></div>' +
          '</div>' +
        '</label>' +
      '</div>',

    compile: function(element, attr) {
      var input = element.find('input');
      forEach({
        'name': attr.name,
        'ng-value': attr.ngValue,
        'ng-model': attr.ngModel,
        'ng-checked': attr.ngChecked,
        'ng-disabled': attr.ngDisabled,
        'ng-true-value': attr.ngTrueValue,
        'ng-false-value': attr.ngFalseValue,
        'ng-change': attr.ngChange
      }, function(value, name) {
        if (isDefined(value)) {
          input.attr(name, value);
        }
      });

      if (attr.toggleClass) {
        element[0].getElementsByTagName('label')[0].classList.add(attr.toggleClass);
      }

      element.addClass('toggle-' + $ionicConfig.form.toggle());

      return function($scope, $element) {
        var el = $element[0].getElementsByTagName('label')[0];
        var checkbox = el.children[0];
        var track = el.children[1];
        var handle = track.children[0];

        var ngModelController = jqLite(checkbox).controller('ngModel');

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

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

  };
}]);