/**
 * Module definition and dependencies
 */
angular.module('Validation.IsolatedForm.Directive', [])

/**
 * Directive
 */
.directive('isolatedForm', function($animate) {
  return {
    restrict: 'A',
    require: '?form',
    link: function(scope, element, attrs, ngModel) {

      //Must have model controller
      if (!ngModel) {
        return;
      }

      //Copy the controller
      var ngModelCopy = {};
      angular.copy(ngModel, ngModelCopy);

      //Get the parent element of the form
      var parent = element.parent().controller('form');

      //Remove parent link to the controller
      parent.$removeControl(ngModel);

      //Replace form controller with an isolated version
      var ngModelIsolated = {
        $setValidity: function(validationToken, isValid, control) {
          ngModelCopy.$setValidity(validationToken, isValid, control);
          parent.$setValidity(validationToken, true, ngModel);
        },
        $setDirty: function() {
          $animate.removeClass(element, 'ng-pristine');
          $animate.addClass(element, 'ng-dirty');
          ngModel.$dirty = true;
          ngModel.$pristine = false;
        },
        $setSubmitted: function() {
          $animate.addClass(element, 'ng-submitted');
          ngModel.$submitted = true;
        }
      };

      //Extend the controller now
      angular.extend(ngModel, ngModelIsolated);
    }
  };
});