(function ($) {
    $.fn.extend({
		/**
	     * Handles execution of remote calls involving file uploads, firing overridable events along the way
	     */
	    callRemotipart: function () {
	        var el      = this,
	            url     = el.attr('action'),
              dataType = el.attr('data-type') || 'script';

	        if (url === undefined) {
	          throw "No URL specified for remote call (action must be present).";
	        } else {
              // Since iframe-submitted form is submitted normal-style and cannot set custom headers,
              // we'll add a custom hidden input to keep track and let the server know this was still
              // an AJAX form, we'll also make it easy to tell from our jQuery element object.
              el
                .append($('<input />', {
                  type: "hidden",
                  name: "remotipart_submitted",
                  value: true
                }))
                .data('remotipartSubmitted', dataType);

	            if (el.triggerAndReturn('ajax:before')) {
              if (dataType == 'script') {
		          	url = url.split('?'); // split on GET params
					      if(url[0].substr(-3) != '.js') url[0] += '.js'; // force rails to respond to respond to the request with :format = js
					      url = url.join('?'); // join on GET params
              }
					
	                el.ajaxSubmit({
	                    url: url,
	                    dataType: dataType,
	                    beforeSend: function (xhr) {
	                        el.trigger('ajax:loading', xhr);
	                    },
	                    success: function (data, status, xhr) {
	                        el.trigger('ajax:success', [data, status, xhr]);
	                    },
	                    complete: function (xhr) {
	                        el.trigger('ajax:complete', xhr);
	                    },
	                    error: function (xhr, status, error) {
	                        el.trigger('ajax:failure', [xhr, status, error]);
	                    }
	                });
	            }

	            el.trigger('ajax:after');
	        }
		},
		_callRemote: $.fn.callRemote, //store the original rails callRemote
		callRemote: function(){ //override the rails callRemote and check for a file input
			if(this.find('input:file').length){
				this.callRemotipart();
			} else {
				this._callRemote();
			}
		}
	});
})(jQuery);