/*-----------------------------------------------------------------------------------*/
/* Theme Ajax   */
/*-----------------------------------------------------------------------------------*/

// Ajaxify
// v1.0.1 - 30 September, 2012
// https://github.com/browserstate/ajaxify
//Version 1.5.1


(function(window,undefined){

	// Prepare our Variables
	var
		History = window.History,
		$ = window.jQuery,
		document = window.document;

	// Check to see if History.js is enabled for our Browser
	if ( !History.enabled ) return false;

	// Disable if modernizr doesn't detect history management
	if (!Modernizr.history) {
	    return false;  //abort
	}
			

	// Wait for Document
	$(function(){
		// Prepare Variables
		var
			/* Application Specific Variables */
			contentSelector = '#sitecontainer',
			$content = $(contentSelector).filter(':first'),
			contentNode = $content.get(0),
			$menu = $('#menu,#nav,nav:first,.nav:first').filter(':first'),
			activeClass = 'active selected current youarehere',
			activeSelector = '.active,.selected,.current,.youarehere',
			menuChildrenSelector = '> li,> ul > li',
			completedEventName = 'statechangecomplete',
			/* Application Generic Variables */
			$window = $(window),
			$body = $(document.body),
			rootUrl = History.getRootUrl(),
			scrollOptions = {
				duration: 800,
				easing:'swing'
			};

		// Ensure Content
		if ( $content.length === 0 ) $content = $body;

		// Internal Helper
		$.expr[':'].internal = function(obj, index, meta, stack){
			// Prepare
			var
				$this = $(obj),
				url = $this.attr('href')||'',
				isInternalLink;

			// Check link
			isInternalLink = url.substring(0,rootUrl.length) === rootUrl || url.indexOf(':') === -1;

			// Ignore or Keep
			return isInternalLink;
		};

		// HTML Helper
		var documentHtml = function(html){
			// Prepare
			// replaces doctype, html head body tags with div
			var result = String(html).replace(/<\!DOCTYPE[^>]*>/i, '')
									 .replace(/<(html|head|body|title|script)([\s\>])/gi,'<div id="document-$1"$2')
									 .replace(/<\/(html|head|body|title|script)\>/gi,'</div>');
			// Return
			return result;
		};

		// Ajaxify Helper
		$.fn.ajaxify = function(){
			// Prepare
			var $this = $(this);

			// Ajaxify
			$this.find('a:internal:not(.no-ajaxy, .themewich-lightbox, .tw-lightbox, .more-posts a, .bx-prev, .bx-next, a[href^="#"], a[href*="wp-login"], a[href*="wp-admin"])').click(function(event){
				// Prepare
				var
					$this	= $(this),
					url		= $this.attr('href'),
					title 	= $this.attr('title') || null;
	
				// If it's a comment link continue as normal
				if (url.toLowerCase().indexOf('#comment') >= 0) {
					return true;
				}

				// Continue as normal for cmd clicks etc
				if ( event.which == 2 || event.metaKey ) return true;

				// Ajaxify this link
				History.pushState(null,title,url);
				event.preventDefault();
				return false;
			});
			// Chain
			return $this;
		};

		// Ajaxify our Internal Links
		$body.ajaxify();

		// Hook into State Changes
		$(window).bind('statechange',function(){
			// Prepare Variables
			var
			State 		= History.getState(),
			url			= State.url,
			relativeUrl = url.replace(rootUrl,'');

			// Start Fade Out
			// Animating to opacity to 0 still keeps the element's height intact
			// Which prevents that annoying pop bang issue when loading in new content
			// Let's add some cool animation here

			$content.animate({opacity:0},800, function(){
				//Scroll to the top of ajax container
				jQuery('.loading').fadeIn(100);
				jQuery('html, body').animate({
							scrollTop: 0
							}, 800);
			});


			// Ajax Request the Traditional Page
			$.ajax({
				url: url,
				success: function(data, textStatus, jqXHR){
					// Prepare
					var
						$data 			= $(documentHtml(data)),
						$dataBody		= $data.find('#document-body:first ' + contentSelector),
						bodyClasses 	= $data.find('#document-body:first').attr('class'),
						contentHtml, 
						$scripts;
					
					// Redo Superfish before adding
				    var $menu_list = $data.find('ul.sf-menu').superfish({ cssArrows: true });

					//Add classes to body
					jQuery('body').attr('class', bodyClasses);
					
					// Fetch the scripts in the body only
					$scripts = $data.find('#document-body:first #document-script');
					if ( $scripts.length ) $scripts.detach(); 

					// Fetch the content
					contentHtml = $dataBody.html()|| $data.html();

					if ( !contentHtml ) {
						document.location.href = url;
						return false;
					}

					// Update the content
					$content.stop(true,true);
					$content.html(contentHtml)
							.ajaxify()
							.css('text-align', '')
							.animate({'opacity': 1}, 500); 
					

					//Append new menu HTML to provided classs
					// For current menu item
					$('.sf-menu').html($menu_list.html());
					$('.sf-menu').ajaxify();
					
					// Update the title
					document.title = $data.find('#document-title:first').text();
					try {
						document.getElementsByTagName('title')[0].innerHTML = document.title.replace('<','&lt;').replace('>','&gt;').replace(' & ',' &amp; ');
					}
					catch ( Exception ) { }

					// Add the body scripts
					$scripts.each(function(){

						var $script = $(this), scriptText = $script.text(), scriptNode = document.createElement('script');
						
						if ( $script.attr('src') ) {
							if ( !$script[0].async ) { scriptNode.async = false; }
							scriptNode.src = $script.attr('src');
						}
						try {
							// doesn't work on ie...
							scriptNode.appendChild(document.createTextNode(scriptText));
							contentNode.appendChild(scriptNode);
						} catch(e) {
							// IE has funky script nodes
							scriptNode.text = scriptText;
							contentNode.appendChild(scriptNode);
						}
   
					});
						
					jQuery('.loading').fadeOut(100);				

					// Inform Google Analytics of the change
					if ( typeof window.pageTracker !== 'undefined' ) window.pageTracker._trackPageview(relativeUrl);

					// Inform ReInvigorate of a state change
					if ( typeof window.reinvigorate !== 'undefined' && typeof window.reinvigorate.ajax_track !== 'undefined' )
						reinvigorate.ajax_track(url);// ^ we use the full url here as that is what reinvigorate supports
				},
				error: function(jqXHR, textStatus, errorThrown){
					document.location.href = url;
					return false;
				}

			}); // end ajax

		}); // end onStateChange

	}); // end onDomLoad
 
})(window); // end closure