/*
    anythingSlider v1.3
    
    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');
        
      // Get the details
        base.singleWidth = base.$single.outerWidth();
        base.pages = base.$items.length;
        
        if (base.pages === 1) {
              base.options.autoPlay = false;
              base.options.buildNavigation = false;
        }

      // Build the navigation if needed
        if (base.options.buildNavigation) base.buildNavigation();

      // 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
            // Ensures any cloned elements with ID's have unique ID's
              var $itemClone = base.$items.filter(':last').clone().addClass('cloned');
              if ($itemClone.attr("id") != "") {
          base.$items.filter(':first').before($itemClone.attr('id', ($itemClone.attr('id') + "-cloned")));
        } else {
          base.$items.filter(':first').before($itemClone);
        }

        $itemClone = base.$items.filter(':first').clone().addClass('cloned');
        if ($itemClone.attr("id") != '') {
          base.$items.filter(':last' ).after($itemClone.attr('id', ($itemClone.attr('id') + "-cloned")));
        } else {
          base.$items.filter(':last' ).after($itemClone);
        }

            // 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 = $("<div class='thumbNav'><ul/></div>").prependTo(base.$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();
                });
                
                $("ul", base.$nav).append($a);
        $a.wrap("<li />");
            });
            base.$navLinks = base.$nav.find('li > 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
            $("ul", base.$nav).prepend($back).append($forward);
        };
        
        // Creates the Start/Stop button
        base.buildAutoPlay = function(){

            base.$startStop = $("<a href='#' class='start-stop'></a>").html(base.playing ? base.options.stopText :  base.options.startText);
            base.$el.prepend(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 text
        stopText: "",               // Stop text
        navigationFormatter: null,      // Details at the top of the file on this use (advanced use)
        forwardText: ">",            // Link text used to move the slider forward
        backText: "<"                // Link text used to move the slider back
    };
    
    $.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);