/*

 * Smoothbox v20070814 by Boris Popoff (http://gueschla.com)

 *

 * Based on Cody Lindley's Thickbox, MIT License

 *

 * Licensed under the MIT License:

 *   http://www.opensource.org/licenses/mit-license.php

 */



// on page load call TB_init

window.addEvent('domready', TB_init);



// prevent javascript error before the content has loaded

TB_WIDTH = 0;

TB_HEIGHT = 0;

var TB_doneOnce = 0 ;



// add smoothbox to href elements that have a class of .smoothbox

function TB_init(){

	$$("a.smoothbox").each(function(el){el.onclick=TB_bind});

}



function TB_bind(event) {

	var event = new Event(event);

	// stop default behaviour

	event.preventDefault();

	// remove click border

	this.blur();

	// get caption: either title or name attribute

	var caption = this.title || this.name || "";

	// get rel attribute for image groups

	var group = this.rel || false;

	// display the box for the elements href

	TB_show(caption, this.href, group);

	this.onclick=TB_bind;

	return false;

}





// called when the user clicks on a smoothbox link

function TB_show(caption, url, rel) {



	// create iframe, overlay and box if non-existent



	if ( !$("TB_overlay") )

	{

		new Element('iframe').setProperty('id', 'TB_HideSelect').injectInside(document.body);

		$('TB_HideSelect').setOpacity(0);

		new Element('div').setProperty('id', 'TB_overlay').injectInside(document.body);

		$('TB_overlay').setOpacity(0);

		TB_overlaySize();

		new Element('div').setProperty('id', 'TB_load').injectInside(document.body);

		$('TB_load').innerHTML = "<img src='"+siteURL+"/images/loading.gif' />";

		TB_load_position();

		new Fx.Style('TB_overlay', 'opacity',{duration: 400, transition: Fx.Transitions.sineInOut}).start(0,0.6);

	}

	

	if ( !$("TB_load") )

	{		

		new Element('div').setProperty('id', 'TB_load').injectInside(document.body);

		$('TB_load').innerHTML = "<img src='"+siteURL+"/images/loading.gif' />";

		TB_load_position();

	}

	

	if ( !$("TB_window") )

	{

		new Element('div').setProperty('id', 'TB_window').injectInside(document.body);

		$('TB_window').setOpacity(0);

	}

	

	$("TB_overlay").onclick=TB_remove;

	window.onscroll=TB_positionEffect;



	// check if a query string is involved

	var baseURL = url.match(/(.+)?/)[1] || url;



	// regex to check if a href refers to an image

	var imageURL = /\.(jpe?g|png|gif|bmp)/gi;



	// check for images

	if ( baseURL.match(imageURL) ) {

		var dummy = { caption: "", url: "", html: "" };

		

		var prev = dummy,

			next = dummy,

			imageCount = "";

			

		// if an image group is given

		if ( rel ) {

			function getInfo(image, id, label) {

				return {

					caption: image.title,

					url: image.href,

					html: "<span id='TB_" + id + "'>&nbsp;&nbsp;<a href='#'>" + label + "</a></span>"

				}

			}

		

			// find the anchors that point to the group

			var imageGroup = [] ;

			$$("a.smoothbox").each(function(el){

				if (el.rel==rel) {imageGroup[imageGroup.length] = el ;}

			})



			var foundSelf = false;

			

			// loop through the anchors, looking for ourself, saving information about previous and next image

			for (var i = 0; i < imageGroup.length; i++) {

				var image = imageGroup[i];

				var urlTypeTemp = image.href.match(imageURL);

				

				// look for ourself

				if ( image.href == url ) {

					foundSelf = true;

					imageCount = "Image " + (i + 1) + " of "+ (imageGroup.length);

				} else {

					// when we found ourself, the current is the next image

					if ( foundSelf ) {

						next = getInfo(image, "next", "Next &gt;");

						// stop searching

						break;

					} else {

						// didn't find ourself yet, so this may be the one before ourself

						prev = getInfo(image, "prev", "&lt; Prev");

					}

				}

			}

		}

		

		imgPreloader = new Image();

		imgPreloader.onload = function() {

			imgPreloader.onload = null;



			// Resizing large images

			var x = window.getWidth() - 150;

			var y = window.getHeight() - 150;

			var imageWidth = imgPreloader.width;

			var imageHeight = imgPreloader.height;

			if (imageWidth > x) {

				imageHeight = imageHeight * (x / imageWidth); 

				imageWidth = x; 

				if (imageHeight > y) { 

					imageWidth = imageWidth * (y / imageHeight); 

					imageHeight = y; 

				}

			} else if (imageHeight > y) { 

				imageWidth = imageWidth * (y / imageHeight); 

				imageHeight = y; 

				if (imageWidth > x) { 

					imageHeight = imageHeight * (x / imageWidth); 

					imageWidth = x;

				}

			}

			// End Resizing

			

			// TODO don't use globals

			TB_WIDTH = imageWidth + 30;

			TB_HEIGHT = imageHeight + 60;

			

			// TODO empty window content instead

			$("TB_window").innerHTML += "<a href='' id='TB_ImageOff' title='Close'><img id='TB_Image' src='"+url+"' width='"+imageWidth+"' height='"+imageHeight+"' alt='"+caption+"'/></a>" + "<div id='TB_caption'>"+caption+"<div id='TB_secondLine'>" + imageCount + prev.html + next.html + "</div></div><div id='TB_closeWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a></div>";

			

			$("TB_closeWindowButton").onclick = TB_remove;

			

			function buildClickHandler(image) {

				return function() {

					$("TB_window").remove();

					new Element('div').setProperty('id', 'TB_window').injectInside(document.body);

					

					TB_show(image.caption, image.url, rel);

					return false;

				};

			}

			var goPrev = buildClickHandler(prev);

			var goNext = buildClickHandler(next);

			if ( $('TB_prev') ) {

				$("TB_prev").onclick = goPrev;

			}

			

			if ( $('TB_next') ) {		

				$("TB_next").onclick = goNext;

			}

			

			document.onkeydown = function(event) {

				var event = new Event(event);

				switch(event.code) {

				case 27:

					TB_remove();

					break;

				case 190:

					if( $('TB_next') ) {

						document.onkeydown = null;

						goNext();

					}

					break;

				case 188:

					if( $('TB_prev') ) {

						document.onkeydown = null;

						goPrev();

					}

					break;

				}

			}

			

			// TODO don't remove loader etc., just hide and show later

			$("TB_ImageOff").onclick = TB_remove;

			TB_position();

			TB_showWindow();

		}

		imgPreloader.src = url;

		

	} else { //code to show html pages

		

		var queryString = url.match(/\?(.+)/)[1];

		var params = TB_parseQuery( queryString );

		

		TB_WIDTH = (params['width']*1) + 30;

		TB_HEIGHT = (params['height']*1) + 40;



		var ajaxContentW = TB_WIDTH - 30,

			ajaxContentH = TB_HEIGHT - 45;

		

		if(url.indexOf('TB_iframe') != -1){				

			urlNoQuery = url.split('TB_');		

			$("TB_window").innerHTML += "<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a></div></div><iframe frameborder='0' hspace='0' src='"+urlNoQuery[0]+"' id='TB_iframeContent' name='TB_iframeContent' style='width:"+(ajaxContentW + 29)+"px;height:"+(ajaxContentH + 17)+"px;' onload='TB_showWindow()'> </iframe>";

		} else {

			$("TB_window").innerHTML += "<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton'>close</a></div></div><div id='TB_ajaxContent' style='width:"+ajaxContentW+"px;height:"+ajaxContentH+"px;'></div>";

		}

				

		$("TB_closeWindowButton").onclick = TB_remove;

		

			if(url.indexOf('TB_inline') != -1){	

				$("TB_ajaxContent").innerHTML = ($(params['inlineId']).innerHTML);

				TB_position();

				TB_showWindow();

			}else if(url.indexOf('TB_iframe') != -1){

				TB_position();

				if(frames['TB_iframeContent'] == undefined){//be nice to safari

					$(document).keyup( function(e){ var key = e.keyCode; if(key == 27){TB_remove()} });

					TB_showWindow();

				}

			}else{

				var handlerFunc = function(){

					TB_position();

					TB_showWindow();

				};

				var myRequest = new Ajax(url, {method: 'get',update: $("TB_ajaxContent"),onComplete: handlerFunc}).request();

			}

	}



	window.onresize=function(){ TB_position(); TB_load_position(); TB_overlaySize();}  

	

	document.onkeyup = function(event){ 	

		var event = new Event(event);

		if(event.code == 27){ // close

			TB_remove();

		}	

	}

		

}



//helper functions below



function TB_showWindow(){

	//$("TB_load").remove();

	//$("TB_window").setStyles({display:"block",opacity:'0'});

	

	if (TB_doneOnce==0) {

		TB_doneOnce = 1;

		var myFX = new Fx.Style('TB_window', 'opacity',{duration: 250, transition: Fx.Transitions.sineInOut, onComplete:function(){if ($('TB_load')) { $('TB_load').remove();}} }).start(0,1);

	} else {

		$('TB_window').setStyle('opacity',1);

		if ($('TB_load')) { $('TB_load').remove();}

	}

}



function TB_remove() {

 	$("TB_overlay").onclick=null;

	document.onkeyup=null;

	document.onkeydown=null;

	

	if ($('TB_imageOff')) $("TB_imageOff").onclick=null;

	if ($('TB_closeWindowButton')) $("TB_closeWindowButton").onclick=null;

	if ( $('TB_prev') ) { $("TB_prev").onclick = null; }

	if ( $('TB_next') ) { $("TB_next").onclick = null; }



	new Fx.Style('TB_window', 'opacity',{duration: 250, transition: Fx.Transitions.sineInOut, onComplete:function(){$('TB_window').remove();} }).start(1,0);

	new Fx.Style('TB_overlay', 'opacity',{duration: 400, transition: Fx.Transitions.sineInOut, onComplete:function(){$('TB_overlay').remove();} }).start(0.6,0);



	window.onscroll=null;

	window.onresize=null;	

	

	$('TB_HideSelect').remove();

	TB_init();

	TB_doneOnce = 0;

	return false;

}



function TB_position() {

	$("TB_window").setStyles({width: TB_WIDTH+'px', 

				 left: (window.getScrollLeft() + (window.getWidth() - TB_WIDTH)/2)+'px',

				 top: (window.getScrollTop() + (window.getHeight() - TB_HEIGHT)/2)+'px'});

}



function TB_positionEffect() {

	new Fx.Styles('TB_window', {duration: 75, transition: Fx.Transitions.sineInOut}).start({

		'left':(window.getScrollLeft() + (window.getWidth() - TB_WIDTH)/2)+'px',

		'top':(window.getScrollTop() + (window.getHeight() - TB_HEIGHT)/2)+'px'});

}



function TB_overlaySize(){

	// we have to set this to 0px before so we can reduce the size / width of the overflow onresize 

	$("TB_overlay").setStyles({"height": '0px', "width": '0px'});

	$("TB_HideSelect").setStyles({"height": '0px', "width": '0px'});

	$("TB_overlay").setStyles({"height": window.getScrollHeight()+'px', "width": window.getScrollWidth()+'px'});

	$("TB_HideSelect").setStyles({"height": window.getScrollHeight()+'px',"width": window.getScrollWidth()+'px'});

}



function TB_load_position() {

	if ($("TB_load")) { $("TB_load").setStyles({left: (window.getScrollLeft() + (window.getWidth() - 56)/2)+'px', top: (window.getScrollTop() + ((window.getHeight()-20)/2))+'px',display:"block"}); }

}



function TB_parseQuery ( query ) {

	// return empty object

	if( !query )

		return {};

	var params = {};

	

	// parse query

	var pairs = query.split(/[;&]/);

	for ( var i = 0; i < pairs.length; i++ ) {

		var pair = pairs[i].split('=');

		if ( !pair || pair.length != 2 )

			continue;

		// unescape both key and value, replace "+" with spaces in value

		params[unescape(pair[0])] = unescape(pair[1]).replace(/\+/g, ' ');

   }

   return params;

}