(function($){
	$.Popup = function(options) {
		return $.Popup.open(options);
	};

	$.Popup.extendNativeFunctionObject({
		close: function(link) {
			var instance = this;

			if (instance.options.onBeforeClose) {
				instance.options.onBeforeClose();
			}

			jQuery(link).parents(".popup:first").remove();

			var jModal = jQuery("#alert-messages .modal:last");

			if (jModal.length) {
				jModal.before(jQuery("#alert-messages .alert-background"));
			}
			else {
				var jBg = jQuery("#alert-messages .alert-background");

				jBg.fadeTo("normal", 0, function() {
					jBg.remove();
				});

				jQuery(window).unbind("resize", $.Popup.center);
				jQuery(window).unbind("resize", $.Popup.resize);
				jQuery(window).unbind("scroll", $.Popup.center);
			}

			if (jQuery.browser.msie &&
				jQuery.browser.version.number() < 7 &&
				$.Popup.count() == 0) {

				jQuery("select").css("visibility", "visible");
			}

			if (instance.options.onClose) {
				instance.options.onClose();
			}
		},

		count: function() {
			return jQuery("#alert-messages .popup").length;
		},

		open: function(options) {
			/*
			 * OPTIONS:
			 * modal (boolean) - show shaded background
			 * message (string|object) - default HTML/object to display
			 * noCenter (boolean) - prevent re-centering
			 * noDraggable (boolean) - prevent draggable
			 * noTitleBar (boolean) - hide title bar
			 * height (int) - starting height of message box
			 * width (int) - starting width of message box
			 * onBeforeClose (function) - executes before closing
			 * onClose (function) - executes after closing
			 */

			var instance = this;

			options = options || {};

			instance.options = options;

			var modal = options.modal;
			var myMessage = options.message;
			var myMessageId = options.messageId;
			var msgHeight = options.height;
			var msgWidth = options.width;
			var noCenter = options.noCenter;
			var noDraggable = options.noDraggable || false;
			var noTitleBar = options.noTitleBar || false;
			var title = options.title;
			var onClose = options.onClose;

			var jAlertMsgs = jQuery("#alert-messages");

			if (!jAlertMsgs.length) {
				jQuery("body").append("<div id='alert-messages' style='position:absolute; top:0; left:0; z-index:" + Liferay.zIndex.ALERT + "'></div>");
				jAlertMsgs = jQuery("#alert-messages");
			}

			jAlertMsgs.append(
				"<div class='popup " + (modal ? "modal" : "") + "' style='position:absolute; top:0; left:0;'>" +
					"<div class='popup-inner'>" +
						(noTitleBar ?
							"<img class='popup-close' src='" + themeDisplay.getPathThemeImages() + "/portlet/close.png'/>" :
							("<div class='popup-header'>" +
								"<span class='popup-title'>" + (title || "&nbsp;") + "</span>" +
								"<img class='popup-close' src='" + themeDisplay.getPathThemeImages() + "/portlet/close.png'/>" +
							"</div>")
						) +
						"<div class='popup-message'></div>" +
					"</div>" +
				"</div>");

			var jPopup = jAlertMsgs.find(".popup:last");
			var jMessage = jPopup.find(".popup-message");

			if (myMessageId) {
				jMessage.attr("id", myMessageId);
			}

			if (noTitleBar) {
				var closeButton = jPopup.find(".popup-close");

				closeButton.hide();

				jPopup.find(".popup-inner").hover(
					function() {
						closeButton.fadeIn("normal");
					},
					function() {
						closeButton.fadeOut("normal");
					}
				);
			}

			jPopup.find(".popup-close").click(function() {
				$.Popup.close(this);
			});

			if (onClose != null) {
				jPopup.find(".popup-close").click(onClose);
			}

			jPopup[0].alertOptions = options;

			jMessage.append(myMessage || "<div class=\"loading-animation\"></div>");

			if (msgHeight) {
				jMessage.css(jQuery.browser.msie ? "height" : "min-height", msgHeight + "px");
			}

			if (msgWidth) {
				jPopup.css("width", msgWidth + "px");
			}

			jPopup.mousedown(function() {
				if (this != jQuery("#alert-messages .popup:last")[0]) {
					jQuery("#alert-messages").append(this);
				}
			});

			var jBg = jAlertMsgs.find(".alert-background");

			if (modal) {
				if (jBg.length) {
					jPopup.before(jBg[0]);
				}
				else {
					jPopup.before("<div class='alert-background' style='position:absolute; top:0; left:0'></div>");
					jBg = jAlertMsgs.find(".alert-background");
					jBg.css({display: "none", opacity: 0});
				}
			}

			if (jQuery.browser.msie &&
				jQuery.browser.version.number("round") < 7 &&
				$.Popup.count() == 1) {

				jQuery('select').css('visibility', 'hidden');
				jPopup.find('select').css('visibility', 'visible');
			}

			if (jAlertMsgs.find(".popup").length == 1) {
				jQuery(window).resize($.Popup.center);
				jQuery(window).resize($.Popup.resize);
				jQuery(window).scroll($.Popup.center);
			}

			$.Popup.resize();
			jBg.fadeTo("normal", 0.5);

			if (!noDraggable) {
				if (false) {

					// jQuery Draggable is slow

					jPopup.Draggable(
						{
							handle: jPopup.find(".popup-header")[0],
							zIndex: Liferay.zIndex.ALERT + 1
						}
					);
				}
				else {
					jPopup.lDrag(
						{
							handle: jPopup.find(".popup-header")[0],
							threshold: 2,
							dragClass: "drag-indicator"
						}
					);
				}
			}

			if (noCenter) {
				$.Popup.center();
			}
			else {
				$.Popup.center(msgHeight, msgWidth);
			}

			Liferay.Util.addInputType(jPopup[0]);
			Liferay.Util.addInputFocus(jPopup[0]);
			window.focus();

			return jMessage[0];
		},

		iframe : function(url, options) {
			var msgHeight = options.height;
			var msgWidth = options.width;
			var message = $.Popup.open(options);
			var iframe = document.createElement("iframe");

			message.height = "";
			iframe.src = url;
			iframe.frameBorder = 0;

			if (msgWidth) {
				iframe.style.width = "100%";
			}

			message.appendChild(iframe);

			if (!options.noCenter) {
				$.Popup.center(msgHeight, msgWidth);
			}

			return message;
		},

		center : function(height, width) {
			var jPopup = jQuery("#alert-messages .popup:last");
			var jBackground = jQuery(".alert-background");

			jBackground.css(
				{
					top: (Viewport.scroll().y)
				}
			);

			if (!jPopup[0].alertOptions.noCenter) {
				jPopup.css(
					{
						top: (Viewport.scroll().y + (Viewport.frame().y/2 - jPopup.height()/2)) + "px",
						left: (Viewport.scroll().x + (Viewport.frame().x/2 - jPopup.width()/2)) + "px"
					}
				);
			}
		},

	    resize: function() {
			jQuery("#alert-messages .alert-background").css(
				{
					height: Viewport.page().y + "px",
					width: Viewport.page().x + "px"
				}
			);
	    },

	    resizeIframe: function(options) {
	    	if ($.Popup.message && options) {
	    		var iframe = $.Popup.message.getElementsByTagName("iframe")[0];
				var loading = jQuery.getOne(".loading-animation", $.Popup.message);

				if (loading) {
					loading.parentNode.removeChild(loading);
				}

	    		if (iframe) {
		    		if (options.height) {
		    			iframe.height = options.height;
		    		}

		    		if (options.width) {
		    			iframe.width = options.width;
		    		}
	    		}
	    	}

	    	$.Popup.resize();
	    },

	    update: function(link, url) {
	    	var jLink = jQuery(link);

			jLink.empty();
			jLink.append("<div class=\"loading-animation\"></div>");

	    	AjaxUtil.update(url, jLink[0]);
	    }
	});
})(Liferay);