/*
  AnythingSlider v1.4

  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 "Panel #" + index; // This would have each tab with the text 'Panel #X' 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;

    // Wraps the ul in the necessary divs and then gives Access to jQuery element
    base.$el = $(el).addClass('anythingBase').wrap('<div class="anythingSlider"><div class="anythingWindow" /></div>');

    // 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.$el = original ul
      base.$wrapper = base.$el.parent().closest('div.anythingSlider'); // parent() then closest incase the ul has anythingSlider class
      base.$window = base.$el.closest('div.anythingWindow');
      base.$items   = base.$el.find('> li').addClass('panel');
      base.$objects = base.$items.find('object');
      base.$dimensions = [];

      // Set up a few defaults & get details
      base.currentPage = base.options.startPanel;
      base.timer = null;
      base.playing = false;
      base.pages   = base.$items.length;
      base.$objlen = !!base.$objects.length;

      // Get index (run time) of this slider on the page
      base.runTimes = $('div.anythingSlider').index(base.$wrapper) + 1;

      // Make sure easing function exists.
      if (!$.isFunction($.easing[base.options.easing])) { base.options.easing = "swing"; }

      // Set the dimensions
      if (base.options.resizeContents) {
        if (base.options.width) {
          base.$wrapper.css('width', base.options.width);
          base.$items.css('width', base.options.width);
        }
        if (base.options.height) {
          base.$wrapper.css('height', base.options.height);
          base.$items.css('height', base.options.height);
        }
        if (base.$objlen){
          base.$objects.find('embed').andSelf().css({ width : '100%', height: '100%' });
        }
      }

      // initialize youtube api - doesn't work in IE (someone have a solution?)
      base.$objects.each(function(){
        if ($(this).find('[src*=youtube]').length){
          $(this).parent()
            .wrap('<div id="yt-temp"></div>')
            .find('embed[src*=youtube]').attr('src', function(i,s){ return s + '&enablejsapi=1&version=3'; }).end()
            .find('param[value*=youtube]').attr('value', function(i,v){ return v + '&enablejsapi=1&version=3'; }).end()
            // detach/appendTo required for Chrome
            .detach()
            .appendTo($('#yt-temp'))
            .unwrap();
        }
      });

      // Remove navigation & player if there is only one page
      if (base.pages === 1) {
        base.options.autoPlay = false;
        base.options.buildNavigation = false;
        base.options.buildArrows = false;
      }

      // 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();
      }

      // Build the navigation
      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');
      base.$items.filter(':first').before( $itemClone.attr('id', function(i,id){ return (id==='') ? '' : id + "-cloned"; }) );

      $itemClone = base.$items.filter(':first').clone().addClass('cloned');
      base.$items.filter(':last' ).after($itemClone.attr('id', function(i,id){ return (id==='') ? '' : id + "-cloned"; }) );

      // We just added two items, time to re-cache the list, then get the dimensions of each panel
      base.$items = base.$el.find('> li'); // reselect
      base.setDimensions();
      if (!base.options.resizeContents) { $(window).load(function(){ base.setDimensions(); }); } // set dimensions after all images load

      // Build forwards/backwards buttons
      if (base.options.buildArrows) { base.buildNextBackButtons(); }

      // If pauseOnHover then add hover effects
      if (base.options.pauseOnHover) {
        base.$wrapper.hover(function() {
          base.clearTimer();
        }, function() {
          base.startStop(base.playing);
        });
      }

      // If a hash can not be used to trigger the plugin, then go to start panel
      if ((base.options.hashTags === true && !base.gotoHash()) || base.options.hashTags === false) {
        base.setCurrentPage(base.options.startPanel, false);
      }

      // Fix tabbing through the page
      base.$items.find('a').focus(function(){
        base.$items.find('.focusedLink').removeClass('focusedLink');
        $(this).addClass('focusedLink');
        base.$items.each(function(i){
          if ($(this).find('a.focusedLink').length) {
            base.gotoPage(i);
            return false;
          }
        });
      });

      // Add keyboard navigation
      $(window).keyup(function(e){
        if (base.$wrapper.is('.activeSlider')) {
          switch (e.which) {
            case 39: // right arrow
              base.goForward();
              break;
            case 37: //left arrow
              base.goBack();
              break;
          }
        }
      });

    };

    // Creates the numbered navigation links
    base.buildNavigation = function() {
      base.$nav = $('<ul class="thumbNav" />').appendTo(base.$wrapper);
      if (base.options.playRtl) { base.$wrapper.addClass('rtl'); }

      if (base.options.buildNavigation && (base.pages > 1)) {
        base.$items.each(function(i,el) {
          var index = i + 1,
            $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.bind('click focusin', function(e) {
            base.gotoPage(index);
            if (base.options.hashTags) { base.setHash('panel' + base.runTimes + '-' + index); }
            e.preventDefault();
          });

          $(base.$nav).append($a);
          $a.wrap("<li />");
        });

      }
    };

    // Creates the Forward/Backward buttons
    base.buildNextBackButtons = function() {
      var $forward = $('<span class="arrow forward"><a href="#">' + base.options.forwardText + '</a></span>'),
        $back = $('<span class="arrow back"><a href="#">' + base.options.backText + '</a></span>');

      // Bind to the forward and back buttons
      $back.click(function(e) {
        base.goBack();
        e.preventDefault();
      });
      $forward.click(function(e) {
        base.goForward();
        e.preventDefault();
      });
      // using tab to get to arrow links will show they have focus (outline is disabled in css)
      $back.add($forward).find('a').bind('focusin focusout',function(){
       $(this).toggleClass('hover');
      });

      // Append elements to page
      base.$wrapper.prepend($forward).prepend($back);
    };

    // 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.$wrapper.append(base.$startStop);
      base.$startStop
        .click(function(e) {
          base.startStop(!base.playing);
          if (base.playing) {
            if (base.options.playRtl) {
              base.goBack(true);
            } else {
              base.goForward(true);
            }
          }
          e.preventDefault();
        })
        // show button has focus while tabbing
        .bind('focusin focusout',function(){
          $(this).toggleClass('hover');
        });

      // Use the same setting, but trigger the start;
      base.startStop(base.playing);
    };

    // Set panel dimensions to either resize content or adjust panel to content
    base.setDimensions = function(){
      var w, h, c, cw, dw, leftEdge = 0, bww = base.$window.width(), winw = $(window).width();
      base.$items.each(function(i){
        c = $(this).children('*');
        if (base.options.resizeContents){
          // get viewport width & height from options (if set), or css
          w = parseInt(base.options.width,10) || bww;
          h = parseInt(base.options.height,10) || base.$window.height();
          // resize panel
          $(this).css({ width: w, height: h });
          // resize panel contents, if solitary (wrapped content or solitary image)
          if (c.length == 1){ c.css({ width: w, height: h }); }
        } else {
          // get panel width & height and save it
          w = $(this).width(); // if not defined, it will return the width of the ul parent
          dw = (w >= winw) ? true : false; // width defined from css?
          if (c.length == 1 && dw){
            cw = (c.width() >= winw) ? bww : c.width(); // get width of solitary child
            $(this).css('width', cw); // set width of panel
            c.css('max-width', cw);   // set max width for all children
            w = cw;
          }
          w = (dw) ?  base.options.width || bww : w;
          $(this).css('width', w);
          h = $(this).outerHeight(); // get height after setting width
          $(this).css('height', h);
        }
        base.$dimensions[i] = [w,h,leftEdge];
        leftEdge += w;
      });
      //  Set total width of slider, but don't go beyond the set max overall width (limited by Opera)
      base.$el.css('width', (leftEdge < base.options.maxOverallWidth) ? leftEdge : base.options.maxOverallWidth);
    };

    base.gotoPage = function(page, autoplay) {
      if (typeof(page) === "undefined" || page === null) {
        page = base.options.startPage;
        base.setCurrentPage(base.options.startPage);
      }

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

      // When autoplay isn't passed, we stop the timer
      if (autoplay !== true) { autoplay = false; }
      // Stop the slider when we reach the last page, if the option stopAtEnd is set to true
      if (!autoplay || (base.options.stopAtEnd && page == base.pages)) { base.startStop(false); }

      // pause YouTube videos before scrolling or prevent change if playing
      if (base.checkVideo(base.playing)) { return; }

      // resize slider if content size varies
      if (!base.options.resizeContents) {
        // animating the wrapper resize before the window prevents flickering in Firefox
        base.$wrapper.filter(':not(:animated)').animate(
          { width: base.$dimensions[page][0], height: base.$dimensions[page][1] },
          { queue: false, duration: base.options.animationTime, easing: base.options.easing }
        );
      }
      // Animate Slider
      base.$window.filter(':not(:animated)').animate(
        { scrollLeft : base.$dimensions[page][2] },
        { queue: false, duration: base.options.animationTime, easing: base.options.easing, complete: function(){ base.endAnimation(page); } }
      );

    };

    base.endAnimation = function(page){
      if (page === 0) {
        base.$window.scrollLeft(base.$dimensions[base.pages][2]);
        page = base.pages;
      } else if (page > base.pages) {
        // reset back to start position
        base.$window.scrollLeft(0);
        page = 1;
      }
      base.setCurrentPage(page, false);

      // continue YouTube video if in current panel
      if (base.$objlen){
        var emb = base.$items.eq(base.currentPage).find('embed[src*=youtube]');
        try {
          if (emb.length && $.isFunction(emb[0].getPlayerState) && emb[0].getPlayerState() > 0) {
            emb[0].playVideo();
          }
        } catch(err) {}
      }
    };

    base.setCurrentPage = function(page, move) {
      // Set visual
      if (base.options.buildNavigation){
        base.$nav.find('.cur').removeClass('cur');
        base.$nav.find('a').eq(page - 1).addClass('cur');
      }

      // Only change left if move does not equal false
      if (!move) {
        base.$wrapper.css({ // .add(base.$window)
          width: base.$dimensions[page][0],
          height: base.$dimensions[page][1]
        });
        base.$wrapper.scrollLeft(0); // reset in case tabbing changed this scrollLeft
        base.$window.scrollLeft( base.$dimensions[page][2] );
      }
      // Update local variable
      base.currentPage = page;

      // Set current slider as active so keyboard navigation works properly
      if (!base.$wrapper.is('.activeSlider')){
        $('.activeSlider').removeClass('activeSlider');
        base.$wrapper.addClass('activeSlider');
      }
    };

    base.goForward = function(autoplay) {
      if (autoplay !== true) { autoplay = false; base.startStop(false); }
      base.gotoPage(base.currentPage + 1, autoplay);
    };

    base.goBack = function(autoplay) {
      if (autoplay !== true) { autoplay = false; base.startStop(false); }
      base.gotoPage(base.currentPage - 1, autoplay);
    };

    // 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(){
      var hash = window.location.hash.match(/^#?panel(\d+)-(\d+)$/);
      if (hash) {
        var panel = parseInt(hash[1],10);
        if (panel == base.runTimes) {
          var slide = parseInt(hash[2],10),
            $item = base.$items.filter(':eq(' + slide + ')');
          if ($item.length !== 0) {
            base.setCurrentPage(slide, false);
            return true;
          }
        }
      }
      return false; // An item wasn't found;
    };

    // 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

    base.clearTimer = function(){
      // Clear the timer only if it is set
      if (base.timer) { window.clearInterval(base.timer); }
    };

    // 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() {
          // prevent autoplay if video is playing
          if (!base.checkVideo(playing)) {
            if (base.options.playRtl) {
              base.goBack(true);
            } else {
              base.goForward(true);
            }
          }
        }, base.options.delay);
      } else {
        base.clearTimer();
      }
    };

    base.checkVideo = function(playing){
      // pause YouTube videos before scrolling?
      var emb, ps, stopAdvance = false;
      if (base.$objlen){
        base.$objects.each(function(){
          // this only works on youtube videos
          emb = $(this).find('embed[src*=youtube]');
          try {
            if (emb.length && $.isFunction(emb[0].getPlayerState)) {
              // player states: unstarted (-1), ended (0), playing (1), paused (2), buffering (3), video cued (5).
              ps = emb[0].getPlayerState();
              // if autoplay, video playing, video is in current panel and resume option are true, then don't advance
              if (playing && ps == 1 && base.$items.index(emb.closest('li')) == base.currentPage && base.options.resumeOnVideoEnd) {
                stopAdvance = true;
              } else {
                // pause video if not autoplaying (if already initialized)
                if (ps > 0) { emb[0].pauseVideo(); }
              }
            }
          } catch(err) {}
        });
      }
      return stopAdvance;
    };

    // Trigger the initialization
    base.init();
  };

  $.anythingSlider.defaults = {
    // Appearance
    width               : null,      // Override the default CSS width
    height              : null,      // Override the default CSS height
    resizeContents      : true,      // If true, solitary images/objects in the panel will expand to fit the viewport

    // Navigation
    startPanel          : 1,         // This sets the initial panel
    hashTags            : true,      // Should links change the hashtag in the URL?
    buildArrows         : true,      // If true, builds the forwards and backwards buttons
    buildNavigation     : true,      // If true, builds a list of anchor links to link to each panel
    navigationFormatter : null,      // Details at the top of the file on this use (advanced use)
    forwardText         : "&raquo;", // Link text used to move the slider forward (hidden by CSS, replaced with arrow image)
    backText            : "&laquo;", // Link text used to move the slider back (hidden by CSS, replace with arrow image)

    // Slideshow options
    autoPlay            : true,      // This turns off the entire slideshow FUNCTIONALY, not just if it starts running or not
    startStopped        : false,     // If autoPlay is on, this can force it to start stopped
    pauseOnHover        : true,      // If true & the slideshow is active, the slideshow will pause on hover
    resumeOnVideoEnd    : true,      // If true & the slideshow is active & a youtube video is playing, it will pause the autoplay until the video is complete
    stopAtEnd           : false,     // If true & the slideshow is active, the slideshow will stop on the last page
    playRtl             : false,     // If true, the slideshow will move right-to-left
    startText           : "Start",   // Start button text
    stopText            : "Stop",    // Stop button text
    delay               : 3000,      // How long between slideshow transitions in AutoPlay mode (in milliseconds)
    animationTime       : 600,       // How long the slideshow transition takes (in milliseconds)
    easing              : "swing",   // Anything other than "linear" or "swing" requires the easing plugin
    
    maxOverallWidth     : 32766      // Max width (in pixels) of combined sliders (side-to-side); set to 32766 to prevent problems with Opera
  };

  $.fn.anythingSlider = function(options) {

    // initialize the slider
    if ((typeof(options)).match('object|undefined')){
      return this.each(function(i){
        (new $.anythingSlider(this, options));
      });

    // If options is a number, process as an external link to page #: $(element).anythingSlider(#)
    } else if (/\d/.test(options) && !isNaN(options)) {
      return this.each(function(i) {
        var anySlide = $(this).data('AnythingSlider');
        if (anySlide) {
          var page = (typeof(options) == "number") ? options : parseInt($.trim(options),10); // accepts "  2  "
          // ignore out of bound pages
          if ( page < 1 || page > anySlide.pages ) { return; }
          anySlide.gotoPage(page);
        }
      });
    }

  };

})(jQuery);