app.factory('RecursionHelper', ['$compile', function($compile){
  return {
    /**
     * Manually compiles the element, fixing the recursion loop.
     * @param element
     * @param [link] A post-link function, or an object with function(s) registered via pre and post properties.
     * @returns An object containing the linking functions.
     */
    compile: function(element, link){
      // Normalize the link parameter
      if(angular.isFunction(link)){
        link = { post: link };
      }

      // Break the recursion loop by removing the contents
      var contents = element.contents().remove();
      var compiledContents;
      return {
        pre: (link && link.pre) ? link.pre : null,
/**
 * Compiles and re-adds the contents
 */
          post: function(scope, element){
            // Compile the contents
            if(!compiledContents){
              compiledContents = $compile(contents);
            }
            // Re-add the compiled contents to the element
            compiledContents(scope, function(clone){
              element.append(clone);
            });

            // Call the post-linking function, if any
            if(link && link.post){
              link.post.apply(null, arguments);
            }
          }
      };
    }
  };
}]);

app.directive('jsonSchema', [ 'RecursionHelper', function(RecursionHelper){
  return {
    restrict: 'E',
  scope: {
    schema: '='
  },
  controller: ['$scope', function($scope){
    $scope.isRequired = function(params, name){
      return _.contains(params.required, name);
    }

    $scope.moreInfo = function(properties) {
      properties = _.clone(properties);
      ['type', 'description'].forEach(function(e){
        delete properties[e];
      })
      var info = '';
      _.keys(properties).forEach( function(k) {
        info = info + k + ": " + properties[k] + "\n";
      })
      return info || '-';
    }

    $scope.isOneOf = function(){
      return !! $scope.schema.oneOf;
    }

    $scope.isObject = function(){
      return !! $scope.schema.properties;
    }

    $scope.isString = function(){
      return $scope.schema.type == 'string';
    }

    $scope.isArray = function(){
      return $scope.schema.type == 'array';
    }

    $scope.isNull = function(){
      return $scope.schema.type == 'null';
    }

    $scope.isBoolean = function(){
      return $scope.schema.type == 'boolean';
    }

    $scope.isEmpty = function(){
      return _.isEmpty($scope.schema);
    }

    $scope.hasMoreInfo = function(value){
      return (! $scope.valueIsArray(value)) && (! $scope.valueIsObject(value));
    }

    $scope.valueIsArray = function(value){
      return value.type === 'array';
    }

    $scope.valueIsObject = function(value){
      return !! value.properties;
    }

    // translate { '$ref': '#/definitions/xx' } to real hash
    $scope.refInfo = function(ref_hash){
      var ref = ref_hash['$ref'];
      var refs = ref.split('/');
      var res;
      _.each(refs, function(ref){
        if( ref === '#' ){
          res = $scope.schema;
        }else{
          res = res[ref];
        }
      });
      return res;
    }
  }],
  compile: function(element){
    return RecursionHelper.compile(element);
  },
  templateUrl: '<%= asset_path("templates/lina/schema.html") %>'
  };

}])