// jQuery lightbox plugin by Leandro Vieira Pinho  (c) 2007
// Modified by Osvaldas Valutis (www.osvaldas.info) (c) 2008

(function($) {
	$.fn.lightBox = function(settings) 
	{
		settings = jQuery.extend(
		{
			overlayBgColor: 		'#000',
			overlayOpacity:			0.4,

			containerResizeSpeed:	400,

			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() 
		{
			var boxBody =
				'<div id="lightbox-overlay"></div>' +
				'<div id="lightbox-container">' +
				'	<div id="lightbox-container-image-box">' + 
				'		<div id="lightbox-container-image">' +
				'			<img id="lightbox-image">' +
				'			<div id="lightbox-loading">įkeliama...</div>' +
				'		</div>' +
				'	</div>' +
				'<div id="lightbox-container-image-data-box">' +
				'	<div id="lightbox-image-details">' +
				'		<span id="lightbox-image-details-caption"></span>' +
				'	</div>'+
				'	<div id="lightbox-close">' + 
				'			<a href="#" id="lightbox-close-link">Uždaryti</a>' +
				'	</div>' +
				'</div>';

			$('body').append(boxBody);
			
			var arrPageSizes = ___getPageSize();
			$('#lightbox-overlay').css(
			{
				backgroundColor:	settings.overlayBgColor,
				opacity:			settings.overlayOpacity,
				width:				arrPageSizes[2],
				height:				arrPageSizes[1]
			}).fadeIn();

			var arrPageScroll = ___getPageScroll();
			$('#lightbox-container').css(
			{
				top:	arrPageScroll[1] + (arrPageSizes[3] / 10),
				left:	arrPageScroll[0]
			}).show();

			$('#lightbox-close-link,#lightbox-container-image-box').click(function() 
			{
				_finish();
				return false;
			});

			$(window).resize(function() 
			{
				var arrPageSizes = ___getPageSize();
				$('#lightbox-overlay').css(
				{
					width:		arrPageSizes[0],
					height:		arrPageSizes[1]
				});

				var arrPageScroll = ___getPageScroll();
				$('#lightbox-container').css(
				{
					top:	arrPageScroll[1] + (arrPageSizes[3] / 10),
					left:	arrPageScroll[0]
				});
			});
		}

		function _set_image_to_view() 
		{
			$('#lightbox-loading').show();
			$('#lightbox-image,#lightbox-nav,#lightbox-nav-btnPrev,#lightbox-nav-btnNext,#lightbox-container-image-data-box,#lightbox-image-details-currentNumber').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(intWidth, intHeight) 
		{
			var intCurrentWidth = $('#lightbox-container-image-box').width();
			var intCurrentHeight = $('#lightbox-container-image-box').height();

			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-nav-btnPrev,#lightbox-nav-btnNext').css({ height: intHeight }); 
			$('#lightbox-container-image-data-box').css({ width: intWidth });
		};


		function _show_image() 
		{
			$('#lightbox-loading').hide();
			$('#lightbox-image').fadeIn(function() 
			{
				_show_image_data();
			});
		};


		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 _finish() 
		{
			$('#lightbox-container').remove();
			$('#lightbox-overlay').fadeOut(function() { $('#lightbox-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);