/*
    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;
	base.timer = null;
	base.playing = false;

        // 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 autoPlay functionality is included, then initialize the settings
	    if(base.options.autoPlay) {
		base.playing = !base.options.startStopped; // Sets the playing variable to false if startStopped is true
		base.buildAutoPlay(); 
	    };
			
	    // If pauseOnHover then add hover effects
	    if(base.options.pauseOnHover) {
		base.$el.hover(function(){
		    base.clearTimer();
		}, function(){
		    base.startStop(base.playing);
		});
	    }
			
	    // 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){
	    // When autoplay isn't passed, we stop the timer
	    if(autoplay !== true) autoplay = false;
	    if(!autoplay) base.startStop(false);
	    
	    if(typeof(page) == "undefined" || page == null) {
		page = 1;
		base.setCurrentPage(1);
	    };
	    
	    // 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){
	    if(autoplay !== true) autoplay = false;
	    base.gotoPage(base.currentPage + 1, autoplay);
	};
	
	base.goBack = 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 numbered navigation links
	base.buildNavigation = function(){
	    base.$nav = $("<div id='thumbNav'></div>").appendTo(base.$el);
	    base.$items.each(function(i,el){
		var index = i + 1;
		var $a = $("<a href='#'></a>");
				
		// If a formatter function is present, use it
		if( typeof(base.options.navigationFormatter) == "function"){
		    $a.html(base.options.navigationFormatter(index, $(this)));
		} else {
		    $a.text(index);
		}
		$a.click(function(e){
                    base.gotoPage(index);
                    
                    if (base.options.hashTags)
			base.setHash('panel-' + index);
		    
                    e.preventDefault();
		});
		base.$nav.append($a);
	    });
	    base.$navLinks = base.$nav.find('> a');
	};
	
	
	// Creates the Forward/Backward buttons
	base.buildNextBackButtons = function(){
	    var $forward = $('<a class="arrow forward">&gt;</a>'),
		$back    = $('<a class="arrow back">&lt;</a>');
	    
            // Bind to the forward and back buttons
            $back.click(function(e){
                base.goBack();
		e.preventDefault();
            });
	    
            $forward.click(function(e){
                base.goForward();
		e.preventDefault();
            });
	    
	    // Append elements to page
	    base.$wrapper.after($back).after($forward);
	};
	
	// Creates the Start/Stop button
	base.buildAutoPlay = function(){
	    
	    base.$startStop = $("<a href='#' id='start-stop'></a>").html(base.playing ? base.options.stopText :  base.options.startText);
	    //base.$el.append(base.$startStop);            
            base.$startStop.click(function(e){
		base.startStop(!base.playing);
		e.preventDefault();
            });
	    
	    // Use the same setting, but trigger the start;
	    base.startStop(base.playing);
	};
	
	// Handles stopping and playing the slideshow
	// Pass startStop(false) to stop and startStop(true) to play
	base.startStop = function(playing){
	    if(playing !== true) playing = false; // Default if not supplied is false
	    
	    // Update variable
	    base.playing = playing;
	    
	    // Toggle playing and text
	    if(base.options.autoPlay) base.$startStop.toggleClass("playing", playing).html( playing ? base.options.stopText : base.options.startText );
			
	    if(playing){
		base.clearTimer(); // Just in case this was triggered twice in a row
		base.timer = window.setInterval(function(){
		    base.goForward(true);
		}, base.options.delay);
	    } else {
		base.clearTimer();
	    };
	};
		
	base.clearTimer = function(){
	    // Clear the timer only if it is set
	    if(base.timer) window.clearInterval(base.timer);
	};
	
	// Taken from AJAXY jquery.history Plugin
	base.setHash = function ( hash ) {
	    // Write hash
	    if ( typeof window.location.hash !== 'undefined' ) {
		if ( window.location.hash !== hash ) {
		    window.location.hash = hash;
		};
	    } else if ( location.hash !== hash ) {
		location.hash = hash;
	    };
	    
	    // Done
	    return hash;
	};
	// <-- End AJAXY code
	

	// Trigger the initialization
        base.init();
    };
    
	
    $.anythingSlider.defaults = {
        easing: "swing",                // Anything other than "linear" or "swing" requires the easing plugin
        autoPlay: true,                 // This turns off the entire FUNCTIONALY, not just if it starts running or not
        startStopped: false,            // If autoPlay is on, this can force it to start stopped
        delay: 3000,                    // How long between slide transitions in AutoPlay mode
        animationTime: 600,             // How long the slide transition takes
        hashTags: true,                 // Should links change the hashtag in the URL?
        buildNavigation: true,          // If true, builds and list of anchor links to link to each slide
        pauseOnHover: true,             // If true, and autoPlay is enabled, the show will pause on hover
	startText: "Start",             // Start text
	stopText: "Stop",               // Stop text
	navigationFormatter: null       // Details at the top of the file on this use (advanced use)
    };
    

    $.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);
		}
	    });
	}
    };

	
})(jQuery);