/* ------------------------------------------------------------------------
	Class: prettyPhoto
	Use: Lightbox clone for jQuery
	Author: Stephane Caron (http://www.no-margin-for-errors.com)
	Customised by: Damien du Toit (http://coda.co.za)
------------------------------------------------------------------------- */

var $pp_pic_holder;

(function($) {
	$.fn.prettyPhoto = function(settings) {
		// global Variables
		var doresize = true;
		var percentBased = false;
		var imagesArray = [];
		var setPosition = 0; /* Position in the set */
		var pp_contentHeight;
		var pp_contentWidth;
		var pp_containerHeight;
		var pp_containerWidth;
		var pp_type = 'image';
	
		// Global elements
		var $caller;
		var $scrollPos = _getScroll();
		
		// Fallback to a supported theme for IE6
		settings.theme = "light_square";
	
		$(window).scroll(function() { $scrollPos = _getScroll(); _centerPicture(); });
		$(window).resize(function() { _centerPicture(); _resizeOverlay(); });
		$(document).keypress(function(e) {
			switch(e.keyCode) {
				case 37:
					if (setPosition == 1) return;
					changePicture('previous');
					break;
				case 39:
					if (setPosition == setCount) return;
					changePicture('next');
					break;
				case 27:
					close();
					break;
			};
	    });
	
		settings = jQuery.extend({
			animationSpeed: 'normal', /* fast/slow/normal */
			padding: 40, /* padding for each side of the picture */
			opacity: 0.80, /* Value between 0 and 1 */
			allowresize: true, /* true/false */
			counter_separator_label: '/', /* The separator for the gallery counter 1 "of" 2 */
			theme: 'light_square', /* light_rounded / dark_rounded / light_square / dark_square */
			callback: function(){}
		}, settings);
	
		$(this).each(function() {
			var isSet = false;
			var setCount = 0; /* Total images in the set */
			var arrayPosition = 0; /* Total position in the array */
			
			imagesArray[imagesArray.length] = this;
			$(this).bind('click',function(){
				open(this);
				return false;
			});
		});
	
		function open(el) {
			$caller = $(el);
		
			// Find out if the picture is part of a set
			theRel = $caller.attr('rel');
			galleryRegExp = /\[(?:.*)\]/;
			theGallery = galleryRegExp.exec(theRel);
		
			// Calculate the number of items in the set, and the position of the clicked picture.
			isSet = false;
			setCount = 0;
			
			for (i = 0; i < imagesArray.length; i++){
				if ($(imagesArray[i]).attr('rel').indexOf(theGallery) != -1) {
					setCount++;
					if (setCount > 1) isSet = true;

					if ($(imagesArray[i]).attr('href') == $caller.attr('href')) {
						setPosition = setCount;
						arrayPosition = i;
					};
				};
			};
		
			_buildOverlay();

			// Display the current position
			$pp_pic_holder.find('p.currentTextHolder').text(setPosition + settings.counter_separator_label + setCount);

			// Position the picture in the center of the viewing area
			_centerPicture();
		
			$('#pp_full_res').hide();
		};
	
		showimage = function(width,height,containerWidth,containerHeight,contentHeight,contentWidth,resized) {
			$('.pp_loaderIcon').hide();

			if ($.browser.opera) {
				windowHeight = window.innerHeight;
				windowWidth = window.innerWidth;
			}
			else {
				windowHeight = $(window).height();
				windowWidth = $(window).width();
			};

			$pp_pic_holder.find('.pp_content').animate({'height':contentHeight},settings.animationSpeed);

			projectedTop = $scrollPos['scrollTop'] + ((windowHeight/2) - (containerHeight/2));
			if (projectedTop < 0) projectedTop = 0;

			// Resize the holder
			$pp_pic_holder.animate({
				'top': projectedTop,
				'left': ((windowWidth / 2) - (containerWidth / 2)),
				'width': containerWidth
			}, settings.animationSpeed, function() {
				$pp_pic_holder.width(containerWidth);
				$pp_pic_holder.find('.pp_hoverContainer, #fullResImage').height(height).width(width);

				// Fade the new image
				$pp_pic_holder.find('#pp_full_res').fadeIn(settings.animationSpeed);

				// Show the nav elements
				_showContent();
			
				// Fade the resizing link if the image is resized
				if (resized) $('a.pp_expand,a.pp_contract').fadeIn(settings.animationSpeed);
			});
		};
		
		function _showContent() {
			// Show the nav
			if (isSet && pp_type=="image") {
					$pp_pic_holder.find('.pp_hoverContainer').fadeIn(settings.animationSpeed);
			}
			else {
				$pp_pic_holder.find('.pp_hoverContainer').hide();
			}

			$pp_pic_holder.find('.pp_details').fadeIn(settings.animationSpeed);
		}
		
		function _hideContent() {
			// Fade out the current picture
			$pp_pic_holder.find('.pp_hoverContainer, .pp_details').fadeOut(settings.animationSpeed);
			$pp_pic_holder.find('#pp_full_res').fadeOut(settings.animationSpeed, function() {
				$('.pp_loaderIcon').show();
				// Preload the image
				_preload();
			});
		}
	
		function changePicture(direction) {
			if (direction == 'previous') {
				arrayPosition--;
				setPosition--;
			}
			else {
				arrayPosition++;
				setPosition++;
			};

			// Allow the resizing of the images
			if (!doresize) doresize = true;

			_hideContent();
			$('a.pp_expand,a.pp_contract').fadeOut(settings.animationSpeed, function() {
				$(this).removeClass('pp_contract').addClass('pp_expand');
			});
		};
	
		function close() {
			$('.pp_loaderIcon').hide();

			$pp_pic_holder.find('object, embed').css('visibility', 'hidden');
			
			$('.pp_pic_holder').fadeOut(settings.animationSpeed);
			
			$('.pp_overlay').fadeOut(settings.animationSpeed, function(){
				$('.pp_overlay,.pp_pic_holder').remove();
			
				// To fix the bug with IE select boxes
				if($.browser.msie && $.browser.version == 6){
					$('select').css('visibility', 'visible');
				};
				
				settings.callback();
			});
			
			doresize = true;
		};
	
		function _checkPosition() {
			// If at the end, hide the next link
			if (setPosition == setCount) {
				$pp_pic_holder.find('.pp_arrow_next').addClass('pp_disabled').unbind('click');
			}
			else { 
				$pp_pic_holder.find('.pp_arrow_next.pp_disabled').removeClass('pp_disabled').bind('click', function() {
					changePicture('next');
					return false;
				});
			};
		
			// If at the beginning, hide the previous link
			if (setPosition == 1) {
				$pp_pic_holder.find('.pp_arrow_previous').addClass('pp_disabled').unbind('click');
			}
			else {
				$pp_pic_holder.find('.pp_arrow_previous.pp_disabled').removeClass('pp_disabled').bind('click', function() {
					changePicture('previous');
					return false;
				});
			};
		
			// Change the current picture text
			$pp_pic_holder.find('.currentTextHolder').text(setPosition + settings.counter_separator_label + setCount);

			$caller = (isSet) ? $(imagesArray[arrayPosition]) : $caller;
		};
	
		function _fitToViewport(width,height) {
			hasBeenResized = false;
		
			_getDimensions(width,height);
			
			// Define them in case there's no resize needed
			imageWidth = width;
			imageHeight = height;

			windowHeight = $(window).height();
			windowWidth = $(window).width();
		
			if ( ((pp_containerWidth > windowWidth) || (pp_containerHeight > windowHeight)) && doresize && settings.allowresize && !percentBased) {
				hasBeenResized = true;
				notFitting = true;
			
				while (notFitting) {
					if((pp_containerWidth > windowWidth)){
						imageWidth = (windowWidth - 100);
						imageHeight = (height/width) * imageWidth;
					}
					else if((pp_containerHeight > windowHeight)){
						imageHeight = (windowHeight - 100);
						imageWidth = (width/height) * imageHeight;
					}
					else{
						notFitting = false;
					};

					pp_containerHeight = imageHeight;
					pp_containerWidth = imageWidth;
				};
			
				_getDimensions(imageWidth,imageHeight);
			};

			return {
				width:imageWidth,
				height:imageHeight,
				containerHeight:pp_containerHeight,
				containerWidth:pp_containerWidth,
				contentHeight:pp_contentHeight,
				contentWidth:pp_contentWidth,
				resized:hasBeenResized
			};
		};
		
		function _getDimensions(width,height){
			// $pp_pic_holder.find('.pp_details').width(width).find('.pp_description').width(width - parseFloat($pp_pic_holder.find('a.pp_close').css('width'))); /* To have the correct height */
			
			// Get the container size, to resize the holder to the right dimensions
			pp_contentHeight = height + $pp_pic_holder.find('.pp_details').height(); //+ parseFloat($pp_pic_holder.find('.pp_details').css('marginTop')) + parseFloat($pp_pic_holder.find('.pp_details').css('marginBottom'));
			pp_contentWidth = width;
			pp_containerHeight = pp_contentHeight;
			pp_containerWidth = width + settings.padding;
		}
	
		function _centerPicture() {
			if ($pp_pic_holder) { if ($pp_pic_holder.size() == 0) { return; } } else { return; }; // Make sure the gallery is open

			if ($.browser.opera) {
				windowHeight = window.innerHeight;
				windowWidth = window.innerWidth;
			}
			else{
				windowHeight = $(window).height();
				windowWidth = $(window).width();
			};
		
			if (doresize) {
				$pHeight = $pp_pic_holder.height();
				$pWidth = $pp_pic_holder.width();
				
				projectedTop = (windowHeight / 2) + $scrollPos['scrollTop'] - ($pHeight / 2);
				if (projectedTop < 0) projectedTop = 0;
				
				$pp_pic_holder.css({
					'top': projectedTop,
					'left': (windowWidth / 2) + $scrollPos['scrollLeft'] - ($pWidth / 2)
				});
			};
		};
	
		function _preload() {
			// Hide the next/previous links if on first or last images.
			_checkPosition();
		
			if (pp_type == 'image') {
				// Set the new image
				imgPreloader = new Image();
		
				// Preload the neighbour images
				nextImage = new Image();
				if (isSet && setPosition > setCount) nextImage.src = $(imagesArray[arrayPosition + 1]).attr('href');
				prevImage = new Image();
				if (isSet && imagesArray[arrayPosition - 1]) prevImage.src = $(imagesArray[arrayPosition - 1]).attr('href');

				pp_typeMarkup = '<img id="fullResImage" src="" />';				
				$pp_pic_holder.find('#pp_full_res')[0].innerHTML = pp_typeMarkup;

				$pp_pic_holder.find('.pp_content').css('overflow','hidden');
				$pp_pic_holder.find('#fullResImage').attr('src',$caller.attr('href'));

				imgPreloader.onload = function(){
					var correctSizes = _fitToViewport(imgPreloader.width,imgPreloader.height);
					imgPreloader.width = correctSizes['width'];
					imgPreloader.height = correctSizes['height'];
					showimage(imgPreloader.width,imgPreloader.height,correctSizes["containerWidth"],correctSizes["containerHeight"],correctSizes["contentHeight"],correctSizes["contentWidth"],correctSizes["resized"]);
				};
		
				imgPreloader.src = $caller.attr('href');
			}
		};
	
		function _getScroll(){
			if (self.pageYOffset) {
				scrollTop = self.pageYOffset;
				scrollLeft = self.pageXOffset;
			}
			else if (document.documentElement && document.documentElement.scrollTop) { // Explorer 6 Strict
				scrollTop = document.documentElement.scrollTop;
				scrollLeft = document.documentElement.scrollLeft;
			}
			else if (document.body) { // all other Explorers
				scrollTop = document.body.scrollTop;
				scrollLeft = document.body.scrollLeft;	
			}
			
			return {scrollTop:scrollTop,scrollLeft:scrollLeft};
		};
	
		function _resizeOverlay() {
			$('.pp_overlay').css({
				'height':$(document).height(),
				'width':$(window).width()
			});
		};
	
		function _buildOverlay(){
			toInject = "";
			
			// Build the background overlay div
			toInject += "<div class='pp_overlay'></div>";
			
			// Define the markup to append, depending on the content type.
			pp_typeMarkup = '<img id="fullResImage" src="" />';
			
			// Basic HTML for the picture holder
			toInject += '<div class="pp_pic_holder"><div class="pp_content"><a href="#" class="pp_expand" title="Expand the image">Expand</a><div class="pp_loaderIcon"></div><div id="pp_full_res">'+ pp_typeMarkup +'</div><div class="pp_details"><p class="pp_close"><a href="#">Close</a></p><p class="pp_description"></p><div class="pp_nav"><a href="#" class="pp_arrow_previous">&larr;</a><p class="currentTextHolder">0'+settings.counter_separator_label+'0</p><a href="#" class="pp_arrow_next">&rarr;</a></div></div></div></div>';
			
			$('body').append(toInject);
			
			// Set my global selectors
			$pp_pic_holder = $('.pp_pic_holder');
			
			$('.pp_overlay').css('height', $(document).height()).bind('click', function() {
				close();
			});

			$pp_pic_holder.css({'opacity': 0}).addClass(settings.theme);

			$('a', '.pp_close').bind('click', function() { close(); return false; });

			$('a.pp_expand').bind('click', function() {				
				$this = $(this);
				
				// Expand the image
				if ($this.hasClass('pp_expand')) {
					$this.removeClass('pp_expand').addClass('pp_contract');
					doresize = false;
				}
				else {
					$this.removeClass('pp_contract').addClass('pp_expand');
					doresize = true;
				};
			
				_hideContent();
				
				$pp_pic_holder.find('.pp_hoverContainer, #pp_full_res, .pp_details').fadeOut(settings.animationSpeed, function() {
					_preload();
				});
		
				return false;	
			});
		
			$pp_pic_holder.find('.pp_previous, .pp_arrow_previous').bind('click', function() {
				changePicture('previous');
				return false;
			});
		
			$pp_pic_holder.find('.pp_next, .pp_arrow_next').bind('click', function() {
				changePicture('next');
				return false;
			});

			$pp_pic_holder.find('.pp_hoverContainer').css({
				'margin-left': settings.padding/2
			});
		
			// If it's not a set, hide the links
			if (!isSet) {
				$pp_pic_holder.find('.pp_hoverContainer,.pp_nav').hide();
			};

			// To fix the bug with IE select boxes
			if ($.browser.msie && $.browser.version == 6) {
				$('body').addClass('ie6');
				$('select').css('visibility','hidden');
			};

			// Then fade it in
			$('.pp_overlay').css('opacity', 0).fadeTo(settings.animationSpeed,settings.opacity, function() {
				$pp_pic_holder.css('opacity', 0).fadeIn(settings.animationSpeed, function() {
					$pp_pic_holder.attr('style','left:' + $pp_pic_holder.css('left') + ';top:' + $pp_pic_holder.css('top') + ';');
					$pp_pic_holder.find('.pp_loaderIcon').show();
					_preload();
				});
			});
		};
	};
})(jQuery);