/*
 * Thickbox 2.1 - jQuery plugin for displaying content in a box above the page
 * 
 * Copyright (c) 2006, 2007 Cody Lindley (http://www.codylindley.com)
 *
 * Licensed under the MIT License:
 *   http://www.opensource.org/licenses/mit-license.php
 */

// on page load call TB_init
$(document).ready(TB_init);

// add thickbox to href elements that have a class of .thickbox
function TB_init(){
	$("a.thickbox").click(function(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);
	});
}

// called when the user clicks on a thickbox link
function TB_show(caption, url, rel) {
	// create iframe, overlay and box if non-existent
	if(!$("#TB_HideSelect").length){
		$("body").append("<iframe id='TB_HideSelect'></iframe><div id='TB_overlay'></div><div id='TB_window'></div>");
		$("#TB_overlay").click(TB_remove);
	}
	
	// TODO create loader only once, hide and show on demand
	$("body").append("<div id='TB_load'><img src='/i/loader-blk.gif' /></div>");
	$('#TB_load').show();
	
	// 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 + "'><a href='#'><b>" + label + "</b></a></span>"
				}
			}
		
			// find the anchors that point to the group
			var imageGroup = $("a[@rel="+rel+"]").get();
			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 = "<span id='TB_count'>Image " + (i + 1) + " of "+ (imageGroup.length)+"</span>";
				} 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 pagesize = TB_getPageSize();
		var x = pagesize[0] - 150;
		var y = pagesize[1] - 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;
		TB_HEIGHT = imageHeight;
		
		// TODO empty window content instead
		$("#TB_window").append("<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'>" + prev.html + next.html + imageCount + "<div id='TB_closeWindow'><a href='#' id='TB_closeWindowButton' title='Close'><b>close</b></a></div></div></div>");
			
		$("#TB_closeWindowButton").click(TB_remove);
		
		function buildClickHandler(image) {
			return function() {
				$("#TB_window").remove();
				$("body").append("<div id='TB_window'></div>");
				TB_show(image.caption, image.url, rel);
				return false;
			};
		}
		var goPrev = buildClickHandler(prev);
		var goNext = buildClickHandler(next);
		if ( prev.html ) {
			$("#TB_prev").click(goPrev);
		}
		
		if ( next.html ) {		
			$("#TB_next").click(goNext);
		}

		// TODO use jQuery, maybe with event fix plugin, or just get the necessary parts of it
		document.onkeydown = function(e) {
			if (e == null) { // ie
				keycode = event.keyCode;
			} else { // mozilla
				keycode = e.which;
			}
			switch(keycode) {
			case 27:
				TB_remove();
				break;
			case 190:
				if( next.html ) {
					document.onkeydown = null;
					goNext();
				}
				break;
			case 188:
				if( prev.html ) {
					document.onkeydown = null;
					goPrev();
				}
				break;
			}
		}

		// TODO don't remove loader etc., just hide and show later
		TB_position();
		$("#TB_load").remove();
		$("#TB_ImageOff").click(TB_remove);

		// for safari using css instead of show
		// TODO is that necessary? can't test safari
		$("#TB_window").css({display:"block"});
	}
	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").append("<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_showIframe()'> </iframe>");
		} else {
			$("#TB_window").append("<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").click(TB_remove);
		
			if(url.indexOf('TB_inline') != -1){	
				$("#TB_ajaxContent").html($('#' + params['inlineId']).html());
				TB_position();
				$("#TB_load").remove();
				$("#TB_window").css({display:"block"}); 
			}else if(url.indexOf('TB_iframe') != -1){
				TB_position();
				if(frames['TB_iframeContent'] == undefined){//be nice to safari
					$("#TB_load").remove();
					$("#TB_window").css({display:"block"});
					$(document).keyup( function(e){ var key = e.keyCode; if(key == 27){TB_remove()} });
				}
			}else{
				$("#TB_ajaxContent").load(url, function(){
					TB_position();
					$("#TB_load").remove();
					$("#TB_window").css({display:"block"}); 
				});
			}
		
	}
	
	document.onkeyup = function(e){ 	
		if (e == null) { // ie
			keycode = event.keyCode;
		} else { // mozilla
			keycode = e.which;
		}
		if(keycode == 27){ // close
			TB_remove();
		}	
	}
		
}

//helper functions below

function TB_showIframe(){
	$("#TB_load").remove();
	$("#TB_window").css({display:"block"});
}

function TB_remove() {
 	$("#TB_imageOff").unbind("click");
	$("#TB_overlay").unbind("click");
	$("#TB_closeWindowButton").unbind("click");
	$("#TB_window").fadeOut("fast",function(){$('#TB_window,#TB_overlay,#TB_HideSelect').remove();});
	$("#TB_load").remove();
	return false;
}

function TB_position() {
	$("#TB_window").css({marginLeft: '-' + parseInt(TB_WIDTH / 2) + 'px', width: TB_WIDTH + 'px'});
	if ( !(jQuery.browser.msie && typeof XMLHttpRequest == 'function') ) { // take away IE6
		$("#TB_window").css({marginTop: '-' + parseInt(TB_HEIGHT / 2) + 'px'});
	}
}

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;
}

function TB_getPageSize(){
	var de = document.documentElement;
	var w = window.innerWidth || self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
	var h = window.innerHeight || self.innerHeight || (de&&de.clientHeight) || document.body.clientHeight
	arrayPageSize = new Array(w,h) 
	return arrayPageSize;
}