/*
 * jQuery Galleriffic plugin
 *
 * Copyright (c) 2008 Trent Foley (http://trentacular.com)
 * Licensed under the MIT License:
 *   http://www.opensource.org/licenses/mit-license.php
 *
 * Thanks to Taku Sano (Mikage Sawatari), whose history plugin I adapted to work with Galleriffic
 * Modified by Ghismo (ghismo.com) to disable the location rewrite 
 */
;(function($) {

	// Write noscript style
	document.write("<style type='text/css'>.noscript{display:none}</style>");

	var ver = 'galleriffic-2.0';
	var galleryOffset = 0;
	var galleries = [];
	var allImages = [];	
	var historyCurrentHash;
	var historyBackStack;
	var historyForwardStack;
	var isFirst = false;
	var dontCheck = false;
	var isInitialized = false;

	function getHashFromString(hash) {
		if (!hash) return -1;
		hash = hash.replace(/^.*#/, '');
		if (isNaN(hash)) return -1;
		return (+hash);
	}

	function getHash() {
		var hash = location.hash;
		return getHashFromString(hash);
	}

	function registerGallery(gallery) {
		galleries.push(gallery);

		// update the global offset value
		galleryOffset += gallery.data.length;
	}

	function getGallery(hash) {
		for (i = 0; i < galleries.length; i++) {
			var gallery = galleries[i];
			if (hash < (gallery.data.length+gallery.offset))
				return gallery;
		}
		return 0;
	}
	
	function getIndex(gallery, hash) {
		return hash-gallery.offset;
	}
	
	function clickHandler(e, gallery, link) {
		if (!gallery.settings.enableHistory) {
			var hash = getHashFromString(link.href);
			if (hash >= 0) {
				var index = getIndex(gallery, hash);
				if (index >= 0)
					gallery.goto(index);
			}
			e.preventDefault();
		}
	}


	var defaults = {
		delay:                  3000,
		numThumbs:              20,
		preloadAhead:           40, // Set to -1 to preload all images
		enableTopPager:         false,
		enableBottomPager:      true,
		imageContainerSel:      '',
		captionContainerSel:    '',
		controlsContainerSel:   '',
		loadingContainerSel:    '',
		renderSSControls:       true,
		renderNavControls:      true,
		playLinkText:           'Play',
		pauseLinkText:          'Pause',
		prevLinkText:           'Previous',
		nextLinkText:           'Next',
		nextPageLinkText:       'Next &rsaquo;',
		prevPageLinkText:       '&lsaquo; Prev',
		enableHistory:          false,
		autoStart:              false,
		onChange:               undefined, // accepts a delegate like such: function(prevIndex, nextIndex) { ... }
		onTransitionOut:        undefined, // accepts a delegate like such: function(callback) { ... }
		onTransitionIn:         undefined, // accepts a delegate like such: function() { ... }
		onPageTransitionOut:    undefined, // accepts a delegate like such: function(callback) { ... }
		onPageTransitionIn:     undefined  // accepts a delegate like such: function() { ... }
	};

	$.fn.nu13thstSubnav = function(thumbsContainerSel, settings) {
	
		//  Extend Gallery Object
		$.extend(this, {
			ver: function() {
				return ver;
			},

			initializeThumbs: function() {
				this.data = [];
				var gallery = this;
				
				this.$thumbsContainer.find('ul > li').each(function(i) {
					var $li = $(this);
					var $aThumb = $li.find('a');
					var hash = gallery.offset+i;

					gallery.data.push({
						title:$aThumb.attr('title'),
						slideUrl:$aThumb.attr('href'),
						caption:$li.find('.caption').remove(),
						hash:hash
					});

					// Setup history
					//$aThumb.attr('rel', 'history');
					$aThumb.attr('href', '#'+hash);
					$aThumb.click(function(e) {
						clickHandler(e, gallery, this);
					});
				});
				
				
				return this;
			},

			getNextIndex: function(index) {
				var nextIndex = index+1;
				if (nextIndex >= this.data.length)
					nextIndex = 0;
				return nextIndex;
			},
			
			getPrevIndex: function(index) {
				var prevIndex = index-1;
				if (prevIndex < 0)
					prevIndex = this.data.length-1;
				return prevIndex;
			},

			goto: function(index) {
				if (index < 0) index = 0;
				else if (index >= this.data.length) index = this.data.length-1;
				
				if (this.settings.onChange)
					this.settings.onChange(this.currentIndex, index);

				this.currentIndex = index;
				
				return this.refresh();
			},
			
			refresh: function() {
			
				var imageData = this.data[this.currentIndex];
				if (!imageData)
					return this;

				// Flag we are transitioning
				var isTransitioning = true;

				var gallery = this;

				var transitionOutCallback = function() {
					// Flag that the transition has completed
					isTransitioning = false;

					// Update Controls
					if (gallery.$controlsContainer) {
						gallery.$controlsContainer
							.find('div.nav-controls a.prev').attr('href', '#'+gallery.data[gallery.getPrevIndex(gallery.currentIndex)].hash).end()
							.find('div.nav-controls a.next').attr('href', '#'+gallery.data[gallery.getNextIndex(gallery.currentIndex)].hash);
					}

					var imageData = gallery.data[gallery.currentIndex];

					// Replace Caption
					if (gallery.$captionContainer) {
						gallery.$captionContainer.empty().append(imageData.caption);
					}

					if (imageData.image) {
						gallery.buildImage(imageData.image);
					} else {
						// Show loading container
						if (gallery.$loadingContainer) {
							gallery.$loadingContainer.show();
						}
					}
				}

				if (this.settings.onTransitionOut) {
					this.settings.onTransitionOut(transitionOutCallback);
				} else {
					this.$transitionContainers.hide();
					transitionOutCallback();
				}

				if (!imageData.image) {
					var image = new Image();
					
					// Wire up mainImage onload event
					image.onload = function() {
						imageData.image = this;

						if (!isTransitioning) {
							gallery.buildImage(imageData.image);
						}
					};

					// set alt and src
					image.alt = imageData.title;
					image.src = imageData.slideUrl;
				}
				
//				var boxItemId = '#' + getHashFromString(imageData.slideUrl);
				$('.box-item').hide();
				$(imageData.slideUrl).fadeIn('fast');				

				// This causes the preloader (if still running) to relocate out from the currentIndex
				this.relocatePreload = true;

				return this.syncThumbs();
			},
			
			buildImage: function(image) {
				if (this.$imageContainer) {
					this.$imageContainer.empty();

					var gallery = this;
					var nextIndex = this.getNextIndex(this.currentIndex);

					// Hide the loading conatiner
					if (this.$loadingContainer) {
						this.$loadingContainer.hide();
					}

					// Setup image
					this.$imageContainer
						.append('<span class="image-wrapper"><a class="advance-link" rel="history" href="#'+this.data[nextIndex].hash+'" title="'+image.alt+'"></a></span>')
						.find('a')
						.append(image)
						.click(function(e) {
							clickHandler(e, gallery, this);
						});
				}

				if (this.settings.onTransitionIn)
					this.settings.onTransitionIn();
				else
					this.$transitionContainers.show();

				return this;
			},

			syncThumbs: function() {
				if (this.$thumbsContainer) {
					var page = Math.floor(this.currentIndex / this.settings.numThumbs);
					if (page != this.currentPage) {
						this.currentPage = page;
						this.updateThumbs();
					}

					// Remove existing selected class and add selected class to new thumb
					var $thumbs = this.$thumbsContainer.find('ul').children();
					$thumbs.filter('.selected').removeClass('selected');
					$thumbs.eq(this.currentIndex).addClass('selected');
				}

				return this;
			},

			updateThumbs: function() {

				var gallery = this;
				var transitionOutCallback = function() {
					gallery.rebuildThumbs();
	
					// Transition In the thumbsContainer
					if (gallery.settings.onPageTransitionIn)
						gallery.settings.onPageTransitionIn();
					else
						gallery.$thumbsContainer.show();
				};
	
				// Transition Out the thumbsContainer
				if (this.settings.onPageTransitionOut) {

					this.settings.onPageTransitionOut(transitionOutCallback);
				} else {

					this.$thumbsContainer.hide();
					transitionOutCallback();
				}

				return this;
			},

			rebuildThumbs: function() {

				// Initialize currentPage to first page
				if (this.currentPage < 0)
					this.currentPage = 0;
				
				var needsPagination = this.data.length > this.settings.numThumbs;

				// Rebuild top pager
				var $topPager = this.$thumbsContainer.find('div.top');
				if ($topPager.length == 0)
					$topPager = this.$thumbsContainer.prepend('<div class="top pagination"></div>').find('div.top');

				if (needsPagination && this.settings.enableTopPager) {
					$topPager.empty();
					this.buildPager($topPager);
				}

				var startIndex = this.currentPage*this.settings.numThumbs;
				var stopIndex = startIndex+this.settings.numThumbs-1;
				if (stopIndex >= this.data.length)
					stopIndex = this.data.length-1;

				// Show/Hide thumbs
				var $thumbsUl = this.$thumbsContainer.find('ul');
				$thumbsUl.find('li').each(function(i) {
					var $li = $(this);
					if (i >= startIndex && i <= stopIndex) {
						$li.show();
					} else {
						$li.hide();
					}
				});

				// Remove the noscript class from the thumbs container ul
				$thumbsUl.removeClass('noscript');
				
				return this;
			},

			buildPager: function(pager) {
				var gallery = this;
				var startIndex = this.currentPage*this.settings.numThumbs;

				//<div class="box-subnav-navleft"><a href="#"><img src="fileadmin/sys/gfx/icons/arrow-big-left.gif" alt="" /></a></div>
				
				// Prev Page Link
				if (this.currentPage > 0) {
					var prevPage = startIndex - this.settings.numThumbs;
					pager.append('<div class="box-subnav-navleft"><a rel="history" href="#'+this.data[prevPage].hash+'" title="'+this.settings.prevPageLinkText+'"><img src="fileadmin/sys/gfx/icons/arrow-big-left.gif" alt="'+this.settings.prevPageLinkText+'" title="'+this.settings.prevPageLinkText+'" /></a></div>');
				}

				//<div class="box-subnav-navright"><a href="#"><img src="fileadmin/sys/gfx/icons/arrow-big-right.gif" alt="" /></a></div>
				
				// Next Page Link
				var nextPage = startIndex+this.settings.numThumbs;
				if (nextPage < this.data.length) {
					pager.append('<div class="box-subnav-navright"><a rel="history" href="#'+this.data[nextPage].hash+'" title="'+this.settings.nextPageLinkText+'"><img src="fileadmin/sys/gfx/icons/arrow-big-right.gif" alt="'+this.settings.nextPageLinkText+'" title="'+this.settings.nextPageLinkText+'" /></a></div>');
				}

				pager.find('a').click(function(e) {
					clickHandler(e, gallery, this);
				});

				return this;
			}
		});

		// Now initialize the gallery
		this.settings = $.extend({}, defaults, settings);
		//enableHistory = this.settings.enableHistory; // Ghismo
		
		// Setup the jQuery object holding each container that will be transitioned
		this.$transitionContainers = $([]);
		if (this.$imageContainer)
			this.$transitionContainers = this.$transitionContainers.add(this.$imageContainer);
		if (this.$captionContainer)
			this.$transitionContainers = this.$transitionContainers.add(this.$captionContainer);
		
		// Set the hash index offset for this gallery
		this.offset = galleryOffset;
		
		this.$thumbsContainer = $(thumbsContainerSel);
		this.initializeThumbs();

		// Add this gallery to the global galleries array
		registerGallery(this);

		this.numPages = Math.ceil(this.data.length/this.settings.numThumbs);
		this.currentPage = -1;
		this.currentIndex = 0;
		var gallery = this;


		// Setup controls
		if (this.settings.controlsContainerSel) {
			this.$controlsContainer = $(this.settings.controlsContainerSel).empty();
					
			if (this.settings.renderNavControls) {
				var $navControls = this.$controlsContainer
					.append('<div class="nav-controls"><a class="prev" rel="history" title="'+this.settings.prevLinkText+'">'+this.settings.prevLinkText+'</a><a class="next" rel="history" title="'+this.settings.nextLinkText+'">'+this.settings.nextLinkText+'</a></div>')
					.find('div.nav-controls a')
					.click(function(e) {
						clickHandler(e, gallery, this);
					});
			}
		}
		
		// Build image
		var hash = getHash();
		var hashGallery = (hash >= 0) ? getGallery(hash) : 0;
		var gotoIndex = (hashGallery && this == hashGallery) ? (hash-this.offset) : 0;
	
		this.goto(gotoIndex);


		return this;
	};
})(jQuery);