/**
 * jQuery lightBox plugin
 * This jQuery plugin was inspired and based on Lightbox 2 by Lokesh Dhakar (http://www.huddletogether.com/projects/lightbox2/)
 * and adapted to me for use like a plugin from jQuery.
 * @name jquery-lightbox-0.5.js
 * @author Leandro Vieira Pinho - http://leandrovieira.com
 * @version 0.5
 * @date April 11, 2008
 * @category jQuery plugin
 * @copyright (c) 2008 Leandro Vieira Pinho (leandrovieira.com)
 * @license CC Attribution-No Derivative Works 2.5 Brazil - http://creativecommons.org/licenses/by-nd/2.5/br/deed.en_US
 * @example Visit http://leandrovieira.com/projects/jquery/lightbox/ for more informations about this jQuery plugin
 */
(function($){
	$.fn.lightBox=function(settings){
		settings=jQuery.extend({
			overlayBgColor:'#000',
			overlayOpacity:0.8,
			fixedNavigation:false,
			imageLoading:'images/light-box/loading.gif',
			imageBtnPrev:'images/light-box/prev.gif',
			imageBtnNext:'images/light-box/next.gif',
			imageBtnClose:'images/light-box/close.gif',
			imageBlank:'images/light-box/blank.gif',
			containerBorderSize:10,
			containerResizeSpeed:400,
			keyToClose:'f',
			keyToPrev:'a',
			keyToNext:'p',
			imageArray:[],
			activeImage:0
		},settings);
		
		var jQueryMatchedObj=this;

		function _initialize(){
			_start(this,jQueryMatchedObj);
			return false;
		}
		
		function _start(objClicked,jQueryMatchedObj){
			$('embed, object, select').css({
				'visibility':'hidden'
			});
			
			_set_interface();
			
			settings.imageArray.length=0;
			settings.activeImage=0;
			
			if(jQueryMatchedObj.length==1){
				settings.imageArray.push(new Array(objClicked.getAttribute('href'),objClicked.getAttribute('title')));
			}else{
				for(var i=0;i<jQueryMatchedObj.length;i++){
					settings.imageArray.push(new Array(jQueryMatchedObj[i].getAttribute('href'),jQueryMatchedObj[i].getAttribute('title')));
				}
			}
			
			while(settings.imageArray[settings.activeImage][0]!=objClicked.getAttribute('href')){
				settings.activeImage++;
			}
			
			_set_image_to_view();
		}
		
		function _set_interface(){
			$('body').append('<div id="jquery-overlay"></div><div id="jquery-lightbox"><div id="lightbox-container-image-box"><div id="lightbox-container-image"><img id="lightbox-image"><div style="" id="lightbox-nav"><a href="#" id="lightbox-nav-btnPrev"></a><a href="#" id="lightbox-nav-btnNext"></a></div><div id="lightbox-loading"><a href="#" id="lightbox-loading-link"><img src="'+settings.imageLoading+'"></a></div></div></div><div id="lightbox-container-image-data-box"><div id="lightbox-container-image-data"><div id="lightbox-image-details"><span id="lightbox-image-details-caption"></span></div><div id="lightbox-secNav" align="right"><a href="#" id="btnClose"><img src="'+settings.imageBtnClose+'"></a></div></div></div></div>');
			
			var arrPageSizes=___getPageSize();
			
			$('#jquery-overlay').css({
				backgroundColor:settings.overlayBgColor,
				opacity:settings.overlayOpacity,
				width:arrPageSizes[0],
				height:arrPageSizes[1]
			}).fadeIn();
			
			var arrPageScroll=___getPageScroll();
			
			$('#jquery-lightbox').css({
				top:arrPageScroll[1]+(arrPageSizes[3]/10),
				left:arrPageScroll[0]
			}).show();
			
			$('#jquery-overlay,#jquery-lightbox').click(function(){
				_finish();
			});
			
			$('#lightbox-loading-link,#btnClose').click(function(){
				_finish();
				return false;
			});
			
			$(window).resize(function(){
				var arrPageSizes=___getPageSize();
				
				$('#jquery-overlay').css({
					width:arrPageSizes[0],
					height:arrPageSizes[1]
				});
				
				var arrPageScroll=___getPageScroll();
				
				$('#jquery-lightbox').css({
					top:arrPageScroll[1]+(arrPageSizes[3]/10),
					left:arrPageScroll[0]
				});
			});
		}
		
		function _set_image_to_view(){
			$('#lightbox-loading').show();
			
			if(settings.fixedNavigation){
				$('#lightbox-image,#lightbox-container-image-data-box').hide();
			}else{
				$('#lightbox-image,#lightbox-nav,#lightbox-nav-btnPrev,#lightbox-nav-btnNext,#lightbox-container-image-data-box').hide();
			}
			
			var objImagePreloader=new Image();
			
			objImagePreloader.onload=function(){
				$('#lightbox-image').attr('src',settings.imageArray[settings.activeImage][0]);
				_resize_container_image_box(objImagePreloader.width,objImagePreloader.height);
				objImagePreloader.onload=function(){};
			};
			
			objImagePreloader.src=settings.imageArray[settings.activeImage][0];
		};
		
		function _resize_container_image_box(intImageWidth,intImageHeight){
			var intCurrentWidth=$('#lightbox-container-image-box').width();
			var intCurrentHeight=$('#lightbox-container-image-box').height();
			var intWidth=(intImageWidth+(settings.containerBorderSize*2));
			var intHeight=(intImageHeight+(settings.containerBorderSize*2));
			var intDiffW=intCurrentWidth-intWidth;
			var intDiffH=intCurrentHeight-intHeight;

			$('#lightbox-container-image-box').animate({
				width:intWidth,
				height:intHeight
			},settings.containerResizeSpeed,function(){
				_show_image();
			});
			
			if((intDiffW==0)&&(intDiffH==0)){
				if($.browser.msie){
					___pause(250);
				}else{
					___pause(100);
				}
			}
			
			$('#lightbox-container-image-data-box').css({
				width:intImageWidth
			});
			
			$('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css({
				height:intImageHeight+(settings.containerBorderSize*2)
			});
		};
		
		function _show_image(){
			$('#lightbox-loading').hide();
			
			$('#lightbox-image').fadeIn(function(){
				_show_image_data();
				_set_navigation();
			});
			
			_preload_neighbor_images();
		};
	
		function _show_image_data(){
			$('#lightbox-container-image-data-box').slideDown('fast');
			$('#lightbox-image-details-caption').hide();
			
			if(settings.imageArray[settings.activeImage][1]){
				$('#lightbox-image-details-caption').html(settings.imageArray[settings.activeImage][1]).show();
			}
		}

		function _set_navigation(){
			$('#lightbox-nav').show();
			
			$('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css({
				'background':'transparent url('+settings.imageBlank+') no-repeat'
			});
			
			if(settings.activeImage!=0){
				if(settings.fixedNavigation){
					$('#lightbox-nav-btnPrev').css({
						'background':'url('+settings.imageBtnPrev+') left 15% no-repeat'
					}).unbind().bind('click',function(){
						settings.activeImage=settings.activeImage-1;
						
						_set_image_to_view();
						
						return false;
					});
				}else{
					$('#lightbox-nav-btnPrev').unbind().hover(function(){
						$(this).css({
							'background':'url('+settings.imageBtnPrev+') left 15% no-repeat'
						});
					},function(){
						$(this).css({
							'background':'transparent url('+settings.imageBlank+') no-repeat'
						});
					}).show().bind('click',function(){
						settings.activeImage=settings.activeImage-1;
						
						_set_image_to_view();
						
						return false;
					});
				}}
				
				if(settings.activeImage!=(settings.imageArray.length-1)){
					if(settings.fixedNavigation){
						$('#lightbox-nav-btnNext').css({
							'background':'url('+settings.imageBtnNext+') right 15% no-repeat'
						}).unbind().bind('click',function(){
							settings.activeImage=settings.activeImage+1;
							
							_set_image_to_view();
							
							return false;
						});
					}else{
						$('#lightbox-nav-btnNext').unbind().hover(function(){
						
						$(this).css({
							'background':'url('+settings.imageBtnNext+') right 15% no-repeat'
						});
					},function(){
						$(this).css({
							'background':'transparent url('+settings.imageBlank+') no-repeat'
						});
					}).show().bind('click',function(){
						settings.activeImage=settings.activeImage+1;
						
						_set_image_to_view();
						
						return false;
					});
				}
			}
				
			_enable_keyboard_navigation();
		}
		
		function _enable_keyboard_navigation(){
			$(document).keydown(function(objEvent){
				_keyboard_action(objEvent);
			});
		}
		
		function _disable_keyboard_navigation(){
			$(document).unbind();
		}
		
		function _keyboard_action(objEvent){
			if(objEvent==null){
				keycode=event.keyCode;
				escapeKey=27;
			}else{
				keycode=objEvent.keyCode;
				escapeKey=objEvent.DOM_VK_ESCAPE;
			}
			
			key=String.fromCharCode(keycode).toLowerCase();
			
			if((key==settings.keyToClose)||(key=='x')||(keycode==escapeKey)){
				_finish();
			}
			
			if((key==settings.keyToPrev)||(keycode==37)){
				if(settings.activeImage!=0){
					settings.activeImage=settings.activeImage-1;
					_set_image_to_view();
					_disable_keyboard_navigation();
				}
			}
			
			if((key==settings.keyToNext)||(keycode==39)){
				if(settings.activeImage!=(settings.imageArray.length-1)){
					settings.activeImage=settings.activeImage+1;
					_set_image_to_view();
					_disable_keyboard_navigation();
				}
			}
		}
		
		function _preload_neighbor_images(){
			if((settings.imageArray.length-1)>settings.activeImage){
				objNext=new Image();
				objNext.src=settings.imageArray[settings.activeImage+1][0];
			}
			
			if(settings.activeImage>0){
				objPrev=new Image();
				objPrev.src=settings.imageArray[settings.activeImage-1][0];
			}
		}
		
		function _finish(){
			$('#jquery-lightbox').remove();

			$('#jquery-overlay').fadeOut(function(){
				$('#jquery-overlay').remove();
			});
			
			$('embed, object, select').css({
				'visibility':'visible'
			});
		}
		
		function ___getPageSize(){
			var xScroll,yScroll;
			
			if(window.innerHeight&&window.scrollMaxY){
				xScroll=window.innerWidth+window.scrollMaxX;
				yScroll=window.innerHeight+window.scrollMaxY;
				
			}else if(document.body.scrollHeight>document.body.offsetHeight){
				xScroll=document.body.scrollWidth;
				yScroll=document.body.scrollHeight;
				
			}else{
				xScroll=document.body.offsetWidth;
				yScroll=document.body.offsetHeight;
			}
			
			var windowWidth,windowHeight;
			
			if(self.innerHeight){
				if(document.documentElement.clientWidth){
					windowWidth=document.documentElement.clientWidth;
				}else{
					windowWidth=self.innerWidth;
				}
				
				windowHeight=self.innerHeight;
				
			}else if(document.documentElement&&document.documentElement.clientHeight){
				windowWidth=document.documentElement.clientWidth;
				windowHeight=document.documentElement.clientHeight;
				
			}else if(document.body){
				windowWidth=document.body.clientWidth;
				windowHeight=document.body.clientHeight;
			}
			
			if(yScroll<windowHeight){
				pageHeight=windowHeight;
			}else{
				pageHeight=yScroll;
			}
			
			if(xScroll<windowWidth){
				pageWidth=xScroll;
			}else{
				pageWidth=windowWidth;
			}
			
			arrayPageSize=new Array(pageWidth,pageHeight,windowWidth,windowHeight);
			
			return arrayPageSize;
		};
		
		function ___getPageScroll(){
			var xScroll,yScroll;
			
			if(self.pageYOffset){
				yScroll=self.pageYOffset;
				xScroll=self.pageXOffset;
				
			}else if(document.documentElement&&document.documentElement.scrollTop){
				yScroll=document.documentElement.scrollTop;
				xScroll=document.documentElement.scrollLeft;
				
			}else if(document.body){
				yScroll=document.body.scrollTop;
				xScroll=document.body.scrollLeft;
			}
			
			arrayPageScroll=new Array(xScroll,yScroll);
			
			return arrayPageScroll;
		};
		
		function ___pause(ms){
			var date=new Date();
			
			curDate=null;
			
			do{
				var curDate=new Date();
				
			}while(curDate-date<ms);
		};
		
		return this.unbind('click').click(_initialize);
	};
	
})(jQuery);