/* ------------------------------------------------------------------------
	Class: prettyGallery
	Use: Gallery plugin for jQuery
	Author: Stephane Caron (http://www.no-margin-for-errors.com)
	Extensions by Ales Simmons (http://www.gravitatemedia.com)
	Version: 1.2
------------------------------------------------------------------------- */

jQuery.fn.prettyGallery = function(settings) {
	settings = jQuery.extend({
		itemsPerPage :1,
		animationSpeed : 'normal', /* fast/normal/slow */
		navigation : 'bottom',  /* top/bottom/both */
		of_label: ' of ', /* The content in the page "1 of 2" */
		previous_title_label: 'Previous page', /* The title of the previous link */
		next_title_label: 'Next page', /* The title of the next link */
		previous_label: 'Previous', /* The content of the previous link */
		next_label: 'Next', /* The content of the next link */
		current_page:1 /* Set the current page to display*/
	}, settings);
	return this.each(function(){
		// Global variables needed in multiple functions.	
		var currentPage = 1;
		var itemWidth = 0;
		var itemHeight = 0;
		var galleryWidth = 0;
		var pageCount = 0;
		var animated = false;
		var $gallery = $(this);
		
		var prettyGalleryPrevious = function(caller) {
			// Make sure not to double animate, and not animate of the button is disabled
			if(animated || $(caller).hasClass('disabled')) return;
			animated = true;

			$gallery.find('li:lt('+(currentPage * settings.itemsPerPage)+')').each(function(i){
				$(this).animate({'left': parseFloat($(this).css('left')) + (galleryWidth + itemMargin) }, settings.animationSpeed, function(){
					animated = false;
				});
			});

			$gallery.find('li:gt('+ ((currentPage * settings.itemsPerPage) - 1) +')').each(function(i){
				$(this).animate({'left': parseFloat($(this).css('left')) + (galleryWidth + itemMargin) }, settings.animationSpeed);
			});

			currentPage--;

			_displayPaging();
		};

		var prettyGalleryNext = function(caller) {
			// Make sure not to double animate, and not animate of the button is disabled
			if(animated || $(caller).hasClass('disabled')) return;
			animated = true;
			
			$gallery.find('li:lt('+(currentPage * settings.itemsPerPage)+')').each(function(i){
				$(this).animate({'left': parseFloat($(this).css('left')) - (galleryWidth + itemMargin) }, settings.animationSpeed, function(){
					animated = false;
				});
			});

            
			$gallery.find('li:gt('+ ((currentPage * settings.itemsPerPage) - 1) +')').each(function(i){
				$(this).animate({'left': parseFloat($(this).css('left')) - (galleryWidth + itemMargin) }, settings.animationSpeed);
			});

			currentPage++;

			_displayPaging();
		};
		
		var _formatGallery = function() {
		
			itemWidth = ($gallery.find('li:first').width());
			itemMargin = parseFloat($gallery.find('li:first').css('margin-right')) + parseFloat($gallery.find('li:first').css('margin-left')) + parseFloat($gallery.find('li:first').css('padding-left')) + parseFloat($gallery.find('li:first').css('padding-right')) + parseFloat($gallery.find('li:first').css('border-left-width')) + parseFloat($gallery.find('li:first').css('border-right-width'));
			itemHeight = $gallery.find('li:first').height() + parseFloat($gallery.find('li:first').css('margin-top')) + parseFloat($gallery.find('li:first').css('margin-bottom')) + parseFloat($gallery.find('li:first').css('padding-top')) + parseFloat($gallery.find('li:first').css('padding-bottom'));
			galleryWidth = (itemWidth + itemMargin) * settings.itemsPerPage - parseFloat($gallery.find('li:first').css('margin-right')); // We don't want the margin of the last item, that's why we remove it.

			$gallery.css({
				'width': galleryWidth,
				'height': itemHeight,
				'overflow': 'hidden',
				'position': 'relative',
				'clear': 'left'
			});		
			
			var itemsCurrentPage = ((settings.itemsPerPage*settings.current_page)-settings.itemsPerPage);
			
			$gallery.find('li').each(function(i){	
			
			var itemsPage = itemsCurrentPage *-1
												
				$(this).css(
			    {
					'position':'absolute',
					'top':0,
					'left':((itemsPage) * (itemWidth + itemMargin))
			    }); 	
			    
			    itemsCurrentPage--;
			});

			$gallery.wrap('<div class="prettyGallery"></div>').addClass('prettyGallery');
		};
		
		var _displayPaging = function() {
			$cg = $gallery.parents('div.prettyGallery:first'); // The containing gallery

            //Set all links to non active         
            $gallery.find('li').each(function(i){
                   
                       
                    $cg.find('ul.prettyNavigation li.navbut'+ (i) +' span').removeClass('active');
                    itemsRun = 1;               
               
            });            
            
            //Set link we are on to display active
            $gallery.find('li').each(function(i){
                        
                if(i == (currentPage * settings.itemsPerPage) - settings.itemsPerPage)
                {
                    $cg.find('ul.prettyNavigation li.navbut'+ (i) +' span').addClass('active');
                }
            });
            
            // Make sur all the links are enabled
			$cg.find('ul.prettyNavigation li a').removeClass('disabled');

			// Display the proper nav
			if(currentPage == 1){
				// Hide the previous button
				$cg.find('ul.prettyNavigation li.prev a').addClass('disabled');
			} else if(currentPage == pageCount) {
				// Hide the next button
				$cg.find('ul.prettyNavigation li.next a').addClass('disabled');
			};
		};

		var _applyNav = function() {
			var template = '';
			template +='<ul class="prettyNavigation">';
			template += '<li class="prev"><a href="#" title="'+settings.previous_title_label+'">'+settings.previous_label+'</a></li>';
			
            var itemsRun = 1;
			$gallery.find('li').each(function(i){
			
			    if(itemsRun == 1)
			    {
			        template += '<li class="navbut' +i +'"><span>'+(i+1)+'</span></li>';
			    }
			    
		        if(itemsRun == settings.itemsPerPage)
			    {
			       itemsRun = 1;
			    }
			    else
			    {
			       itemsRun++;
			    }
			});
			
			//template += '<li><span class="current">1</span>'+settings.of_label+'<span class="total">1</span></li>';
			template += '<li class="next"><a href="#" title="'+settings.next_title_label+'">'+settings.next_label+'</a></li>';
			template += '</ul>';

			switch(settings.navigation){
				case 'top':
					$gallery.before(template);
					break;
				case 'bottom':
					$gallery.after(template);
					break;
				case 'both':
					$gallery.before(template);
					$gallery.after(template);
					break;
			};

			// Adjust the nav to the gallery width
			$theNav = $gallery.parent('div.prettyGallery:first').find('ul.prettyNavigation');
			galleryBorderWidth = parseFloat($theNav.css('border-left-width')) + parseFloat($theNav.css('border-right-width'));
			$theNav.width(galleryWidth - galleryBorderWidth);
			
			// Apply the functions to the buttons
			$theNav.find('li.prev a').bind('click',function(){
				prettyGalleryPrevious(this);
				return false;
			});

			$theNav.find('li.next a').bind('click',function(){
				prettyGalleryNext(this);
				return false;
			});
		};
		
		// Check if we need the gallery
		if($(this).find('li').size() > settings.itemsPerPage) {		
			// Set the number of pages
			pageCount = Math.ceil($(this).find('li').size() / settings.itemsPerPage);
			
			// Format the gallery properly
			 _formatGallery();
			 currentPage = settings.current_page;
			
			// Build and display the nav
			_applyNav();
			
			// Display the proper paging
			_displayPaging(this);
		};
	});
};