/*
 * 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);

var imgLoaded = false;

// 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.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 ) {
		
		// grabbing the inner bg color for this
		innerbg = $('input#inner_bg').val();
		textcolor = $('input#text_color').val();
		
		$("body").append("<iframe id='TB_HideSelect'></iframe><div id='TB_overlay'></div><div id='TB_window' style='background: "+innerbg+"; color: "+textcolor+"'></div>");
		$("#TB_overlay").click(TB_remove);
	}
	// TODO replace or check if event is already assigned
	//$(window).scroll(TB_position);
	
	// TODO replace
	TB_overlaySize();
	
	// TODO create loader only once, hide and show on demand
	$("body").append("<div id='TB_load'><img src='img/loadingAnimation.gif' /></div>");
	TB_load_position();
	
	// 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)/gi;

	// check for images
	if ( baseURL.match(imageURL) ) {
		var dummy = { caption: "", url: "", html: "", html2: "" };
		
		var prev = dummy,
			next = dummy,
			imageCount = "";
			
		// if an image group is given
		if ( rel ) {
			function getInfo(image, id, label) {
				
				cap = image.name;
				  
				return {
					caption: cap,
					url: image.href,
					html: "<span id='TB_" + id + "'><a href='#'>" + label + "</a></span>",
					html2: "<span id='TB_" + id + "2'><a href='#'>" + label + "</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
			// "-1"s after "imageGroup.length" were added later to comply with the needings of www.theflights.net. [Michele Fiore - postmaster@theflights.net]
			for (var i = 0; i < (imageGroup.length-1); i++) {
				var image = imageGroup[i];
				var urlTypeTemp = image.href.match(imageURL);
				
				// look for ourself
				if ( image.href == url ) {
					foundSelf = true;
					//imageCount = $('input#thick_image').val()+" " + (i + 1) + " "+$('input#thick_of').val()+" "+ (imageGroup.length);
					imageCount = (i + 1) + "&nbsp;/&nbsp;" + (imageGroup.length-1);
				} else {
					// when we found ourself, the current is the next image
					if ( foundSelf ) {
						next = getInfo(image, "next", $('input#thick_next').val()+" &gt;");
						// stop searching
						break;
					} else {
						// didn't find ourself yet, so this may be the one before ourself
						prev = getInfo(image, "prev", "&lt; "+$('input#thick_prev').val());
					}
				}
			}
		}
		
		imgPreloader = new Image();
		imgPreloader.onload = function() {
			imgPreloader.onload = null;

			// Resizing large images
			// Modified by Michele Fiore to suite www.theflights.net needings; added resizing module by the screen size
			//if ( (screen.width > (imgPreloader.width + 95) ) && (screen.height > (imgPreloader.height + 255) ) )  {
			var imageWidth = imgPreloader.width;
			var imageHeight = imgPreloader.height;
			//	}
			//else  {
			while ((imageWidth > (screen.width - 95)) || (imageHeight > (screen.height - 250)))
				{
				var imageWidth = imageWidth / 2;
				var imageHeight = (imageWidth / imgPreloader.width) * imgPreloader.height;
				if (screen.height < (imageHeight + 250) )
					{
					imageHeight = imageHeight / 2;
					imageWidth = (imageHeight / imgPreloader.height) * imgPreloader.width;
					}
				}
			
			// End Resizing

			// TODO don't use globals
			TB_WIDTH = imageWidth + 30;
			TB_HEIGHT = imageHeight + 60;
			
			if(caption)
			  caption += "<br /><br />";
			
			// TODO empty window content instead
			$("#TB_window").append("<table class='TB_table' cellspacing='0' cellpadding='0'><tr><td class='left'>" + prev.html + "&nbsp;</td><td class='center'>&nbsp;" + imageCount + "&nbsp;</td><td class='right'>&nbsp;" + next.html + "</td></tr></table><a href='' id='TB_ImageOff' title='"+$('input#thick_close').val()+"'><img id='TB_Image' src='"+url+"' width='"+imageWidth+"' height='"+imageHeight+"' /></a>" + "<div id='TB_caption'>"+caption+"</div><table class='TB_table' cellspacing='0' cellpadding='0'><tr><td class='left'>" + prev.html2 + "&nbsp;</td><td class='center'><a href='#' id='TB_closeWindowButton' title='"+$('input#thick_close').val()+"'>&Chi; "+$('input#thick_close').val()+"</a></td><td class='right'>&nbsp;" + next.html2 + "</td></tr></table>");
			
			$("#TB_closeWindowButton").click(TB_remove);
			
			function buildClickHandler(image) {
				return function() {
					$("#TB_window").remove();
					
					innerbg = $('input#inner_bg').val();
					textcolor = $('input#text_color').val();
					
					$("body").append("<div id='TB_window' style='background: "+innerbg+"; color: "+textcolor+"'></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);
				$("#TB_prev2").click(goPrev);
			}
			
			if ( next.html ) {		
				$("#TB_next").click(goNext);
				$("#TB_next2").click(goNext);
			}
			
			// 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;
		
	} 
	
	$(window).resize(TB_position);	
}

//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() {
	var pagesize = TB_getPageSize();	
	var arrayPageScroll = TB_getPageScrollTop();
	var style = {width: TB_WIDTH, left: (arrayPageScroll[0] + (pagesize[0] - TB_WIDTH)/2), top: (arrayPageScroll[1] + 20)};

	$("#TB_window").css(style);
}
			// Modified by Michele Fiore to suite www.theflights.net needings; added " + 50 " to scrollMaxY
function TB_overlaySize(){
	if (window.innerHeight && window.scrollMaxY || window.innerWidth && window.scrollMaxX) {	
		yScroll = window.innerHeight + window.scrollMaxY + 50;
		xScroll = window.innerWidth + window.scrollMaxX;
		var deff = document.documentElement;
		var wff = (deff&&deff.clientWidth) || document.body.clientWidth || window.innerWidth || self.innerWidth;
		var hff = (deff&&deff.clientHeight) || document.body.clientHeight || window.innerHeight || self.innerHeight;
		xScroll -= (window.innerWidth - wff);
		yScroll -= (window.innerHeight - hff);
	} else if (document.body.scrollHeight > document.body.offsetHeight || document.body.scrollWidth > document.body.offsetWidth){ // all but Explorer Mac
		yScroll = document.body.scrollHeight + 50;
		xScroll = document.body.scrollWidth;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		yScroll = document.body.offsetHeight + 50;
		xScroll = document.body.offsetWidth;
  	}
	$("#TB_overlay").css({"height": yScroll, "width": xScroll});
	$("#TB_HideSelect").css({"height": yScroll,"width": xScroll});
}

function TB_load_position() {
	
	var pagesize = TB_getPageSize();
	var arrayPageScroll = TB_getPageScrollTop();
	$("#TB_load")
		.css({left: (arrayPageScroll[0] + (pagesize[0] - 100)/2), top: (arrayPageScroll[1] + ((pagesize[1]-100)/2)) })
		.css({display:"block"});
		
	imgLoaded = true;
}

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_getPageScrollTop(){
	
	//if (imgLoaded) return;
	
	var yScrolltop;
	var xScrollleft;
	if (self.pageYOffset || self.pageXOffset) {
		yScrolltop = self.pageYOffset;
		xScrollleft = self.pageXOffset;
	} else if (document.documentElement && document.documentElement.scrollTop || document.documentElement.scrollLeft ){	 // Explorer 6 Strict
		yScrolltop = document.documentElement.scrollTop;
		xScrollleft = document.documentElement.scrollLeft;
	} else if (document.body) {// all other Explorers
		yScrolltop = document.body.scrollTop;
		xScrollleft = document.body.scrollLeft;
	}
	arrayPageScroll = new Array(xScrollleft,yScrolltop) 
	return arrayPageScroll;
}

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;
}