/* Adapted by Samuel Viani - www.samuelviani.com 
 *
 * jQuery EasIng v1.1.2 - http://gsgd.co.uk/sandbox/jquery.easIng.php
 *
 * Uses the built In easIng capabilities added In jQuery 1.1
 * to offer multiple easIng options
 *
 * Copyright (c) 2007 George Smith
 * Licensed under the MIT License:
 *   http://www.opensource.org/licenses/mit-license.php
 */

jQuery.extend( jQuery.easing,
{
	easeInOutExpo: function (x, t, b, c, d) {
		if (t==0) return b;
		if (t==d) return b+c;
		if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
		return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;
	}
});


/*  Adapted by Samuel Viani - www.samuelviani.com 

    anythingSlider v1.2
    
    By Chris Coyier: http://css-tricks.com
    with major improvements by Doug Neiner: http://pixelgraphics.us/
    based on work by Remy Sharp: http://jqueryfordesigners.com/


	To use the navigationFormatter function, you must have a function that
	accepts two paramaters, and returns a string of HTML text.
	
	index = integer index (1 based);
	panel = jQuery wrapped LI item this tab references
	@return = Must return a string of HTML/Text
	
	navigationFormatter: function(index, panel){
		return index + " Panel"; // This would have each tab with the text 'X Panel' where X = index
	}
*/

(function($){
	
    $.anythingSlider = function(el, options){
        // To avoid scope issues, use 'base' instead of 'this'
        // to reference this class from internal events and functions.
        var base = this;
        
        // Access to jQuery and DOM versions of element
        base.$el = $(el);
        base.el = el; 

		// Set up a few defaults
        base.currentPage = 1;

        // Add a reverse reference to the DOM object
        base.$el.data("AnythingSlider", base);
        
        base.init = function(){
            base.options = $.extend({},$.anythingSlider.defaults, options);
			
			// Cache existing DOM elements for later 
			base.$wrapper = base.$el.find('> div').css('overflow', 'hidden');
            base.$slider  = base.$wrapper.find('> ul');
            base.$items   = base.$slider.find('> li');
            base.$single  = base.$items.filter(':first');

			// Build the navigation if needed
			if(base.options.buildNavigation) base.buildNavigation();
        
        	// Get the details
            base.singleWidth = base.$single.outerWidth();
            base.pages = base.$items.length;

            // Top and tail the list with 'visible' number of items, top has the last section, and tail has the first
			// This supports the "infinite" scrolling
			base.$items.filter(':first').before(base.$items.filter(':last').clone().addClass('cloned'));
            base.$items.filter(':last' ).after(base.$items.filter(':first').clone().addClass('cloned'));

			// We just added two items, time to re-cache the list
            base.$items = base.$slider.find('> li'); // reselect
            
			// Setup our forward/backward navigation
			base.buildNextBackButtons();
		
			
			// If a hash can not be used to trigger the plugin, then go to page 1
			if((base.options.hashTags == true && !base.gotoHash()) || base.options.hashTags == false){
				base.setCurrentPage(1);
			};
        };

		base.gotoPage = function(page, autoplay){
			
			// Just check for bounds
			if(page > base.pages + 1) page = base.pages;
			if(page < 0 ) page = 1;

			var dir = page < base.currentPage ? -1 : 1,
                n = Math.abs(base.currentPage - page),
                left = base.singleWidth * dir * n;
			
			base.$wrapper.filter(':not(:animated)').animate({
                scrollLeft : '+=' + left
            }, base.options.animationTime, base.options.easing, function () {
                if (page == 0) {
                    base.$wrapper.scrollLeft(base.singleWidth * base.pages);
					page = base.pages;
                } else if (page > base.pages) {
                    base.$wrapper.scrollLeft(base.singleWidth);
                    // reset back to start position
                    page = 1;
                };
				base.setCurrentPage(page);
				
            });
		};
		
		base.setCurrentPage = function(page, move){
			// Set visual
			if(base.options.buildNavigation){
				base.$nav.find('.cur').removeClass('cur');
				$(base.$navLinks[page - 1]).addClass('cur');	
			};
			
			// Only change left if move does not equal false
			if(move !== false) base.$wrapper.scrollLeft(base.singleWidth * page);

			// Update local variable
			base.currentPage = page;
		};
		
		base.goForward = function(autoplay){
			base.gotoPage(base.currentPage + 1, autoplay);
		};
		
		base.goBackward = function(){
			base.gotoPage(base.currentPage - 1);
		};
		
		// This method tries to find a hash that matches panel-X
		// If found, it tries to find a matching item
		// If that is found as well, then that item starts visible
		base.gotoHash = function(){
			if(/^#?panel-\d+$/.test(window.location.hash)){
				var index = parseInt(window.location.hash.substr(7));
				var $item = base.$items.filter(':eq(' + index + ')');
				if($item.length != 0){
					base.setCurrentPage(index);
					return true;
				};
			};
			return false; // A item wasn't found;
		};
        		
		// Creates the Forward/Backward buttons
		base.buildNextBackButtons = function(){
			var $forward = $('<a class="arrow forward" title="FORWARD">FORWARD</a>'),
				$backward = $('<a class="arrow backward" title="BACKWARD">BACKWARD</a>');
				
            // Bind to the forward and back buttons
            $backward.click(function(e){
                base.goBackward();
				e.preventDefault();
            });

            $forward.click(function(e){
                base.goForward();
				e.preventDefault();
            });

			// Append elements to page
			base.$wrapper.after($backward).after($forward);
		};

		// Trigger the initialization
        base.init();
    };
    
    $.fn.anythingSlider = function(options){
		if(typeof(options) == "object"){
		    return this.each(function(i){			
				(new $.anythingSlider(this, options));

	            // This plugin supports multiple instances, but only one can support hash-tag support
				// This disables hash-tags on all items but the first one
				options.hashTags = false;
	        });	
		} else if (typeof(options) == "number") {

			return this.each(function(i){
				var anySlide = $(this).data('AnythingSlider');
				if(anySlide){
					anySlide.gotoPage(options);
				}
			});
		}
    };

        function formatText(index, panel) {
		  return index + "";
	    }
    
        $(function () {
        
            $('.anythingSlider').anythingSlider({
                easing: "easeInOutExpo",        // Anything other than "linear" or "swing" requires the easing plugin
                animationTime: 400,             // How long the slide transition takes
                hashTags: true,                 // Should links change the hashtag in the URL?
		        navigationFormatter: formatText       // Details at the top of the file on this use (advanced use)
            });
            
        });

	
})(jQuery);