/*
    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

//       var lastElement = base.$items.filter(':last').addClass('cloned');
//       base.$items.filter(':first').before($(lastElement));
//       var firstElement = base.$items.filter(':first').addClass('cloned');
//       base.$items.filter(':last' ).after($(firstElement));
       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.options.continuePlaying == false) 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)));
            if (i == 0)
              $a.addClass("first");
            else if (i == (base.$items.length - 1))
              $a.addClass("last");
          } 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)
    continuePlaying: false
  };
  

  $.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);