/*
    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 = $('<li class="arrow forward"><a href="#">' + base.options.forwardText + '</a></li>'),
            $back    = $('<li class="arrow back"><a href="#">' + base.options.backText + '</a></li>');
            
            // 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);