/*
 * jQuery Infinite Carousel
 * @author admin@catchmyfame.com - http://www.catchmyfame.com
 * @version 2.0.2
 * @date June 12, 2010
 * @category jQuery plugin
 * @copyright (c) 2009 admin@catchmyfame.com (www.catchmyfame.com)
 * @license CC Attribution-Share Alike 3.0 - http://creativecommons.org/licenses/by-sa/3.0/
 */

(function($){
  $.fn.extend({ 
    infiniteCarousel: function(options)
    {
      var defaults = 
      {
        transitionSpeed: 800,
        displayTime: 6000,
        textholderHeight: .25,
        displayProgressBar: true,
        displayThumbnails: true,
        displayThumbnailNumbers: true,
        displayThumbnailBackground: true,
        thumbnailWidth: '20px',
        thumbnailHeight: '20px',
        thumbnailFontSize: '.7em',
        easeLeft: 'linear',
        easeRight: 'linear',
        imagePath: '/js/infinitecarousel/images/',
        inView: 1,
        padding: '0px',
        advance: 1,
        showControls: true,
        autoHideControls: false,
        autoHideCaptions: false,
        autoStart: true,
        prevNextInternal: true,
        enableKeyboardNav: true,
        onSlideStart: function(){},
        onSlideEnd: function(){},
        onPauseClick: function(){}
      };
    var options = $.extend(defaults, options);
  
        return this.each(function() {
          var randID = Math.round(Math.random()*100000000);
      var o=options;
      var obj = $(this);
      var autopilot = o.autoStart;

      var numImages = $('img', obj).length; // Number of images
      var imgHeight = $('img:first', obj).height();
      var imgWidth = $('img:first', obj).width();

      if(o.inView > numImages-1) o.inView=numImages-1; // check to make sure inview isnt greater than the number of images. inview should be at least two less than numimages (otherwise hinting wont work and animating left may catch a flash), but one less can work
      $('p', obj).hide(); // Hide any text paragraphs in the carousel
      $(obj).css({'position':'relative','overflow':'hidden'}).width((imgWidth*o.inView)+(o.inView*parseInt(o.padding)*2)).height(imgHeight+(parseInt(o.padding)*2)); //,'overflow':'hidden'
      $('ul', obj).css({'list-style':'none','margin':'0','padding':'0','position':'relative'}).width(imgWidth*numImages);
      $('li', obj).css({'display':'inline','float':'left','padding':o.padding});

      // Move rightmost image over to the left
      $('li:last', obj).prependTo($('ul', obj));
      $('ul', obj).css('left',-imgWidth-(parseInt(o.padding)*2)+'px').width(9999);

      // Build progress bar
      if(o.displayProgressBar)
      {
        $(obj).append('<div id="progress'+randID+'" class="ic-progress-bar" style="position:absolute;bottom:0;background:#bbb;left:0;z-index:1"></div>');
        $('#progress'+randID).width('100%').height(5).css('opacity','.6');
      }

      // Animate progress bar
      function startProgressBar(barTime)
      {
        barTime = (barTime==null)? o.displayTime:barTime;
        $('#progress'+randID).width('100%').height(5);
        $('#progress'+randID).animate({'width':0},barTime);
      }

      // Build textholder div(s) as wide as one image and as tall as the textholderHeight option
      var containerBorder = parseInt($(obj).css('border-bottom-width')) + parseInt($(obj).css('border-top-width'));
      if(isNaN(containerBorder)) containerBorder = 0; // IE returns NaN for $(obj).css('border-bottom-width')
      var containerPaddingLeft = parseInt($(obj).css('padding-left')); // Normally we'd do both left and right but only left matters here
      for(i=1;i<=o.inView;i++)
      {
        $(obj).append('<div id="textholder'+randID+'_'+i+'" class="textholder" style="position:absolute;width:'+imgWidth+'px;bottom:0px;margin-bottom:'+-(imgHeight*o.textholderHeight+containerBorder)+'px;"><span></span></div>');
        $('#textholder'+randID+'_'+i).css({'left':(i-1)*(imgWidth+parseInt(o.padding)*2),'margin-left':parseInt(o.padding)+containerPaddingLeft,'margin-right':o.padding});
        $('#textholder'+randID+'_'+i).height(imgHeight*o.textholderHeight).css({'backgroundColor':'#FFF','opacity':'0.5'});
        html = '<div class="minmax" id="minmax'+randID+'_'+i+'" style="width:8px;height:8px;position:absolute;top:1px;right:10px;cursor:pointer;background:url('+o.imagePath+'caption.gif) no-repeat 0 -8px"></div>';
        html += '<div class="close" id="close'+randID+'_'+i+'" style="width:8px;height:8px;position:absolute;top:1px;right:1px;cursor:pointer;background:url('+o.imagePath+'caption.gif) no-repeat 0 0"></div>';
        $('#textholder'+randID+'_'+i).append(html);
        $('#minmax'+randID+'_'+i).hide();
        $('#close'+randID+'_'+i).hide();
        if(!o.autoHideCaptions) showtext($('li:eq('+i+') p', obj).html(),i);
      }
      var textholderPadding = parseInt($('#textholder'+randID+'_1').css('padding-left')) + parseInt($('#textholder'+randID+'_1').css('padding-right'));
      if (textholderPadding > 0) $('.textholder',obj).width(imgWidth-textholderPadding);

      $('.close',obj).each(function(i){ // Need to use each() because a loop doesn't work in this situation. see http://www.bennadel.com/blog/534-The-Beauty-Of-The-jQuery-Each-Method.htm
        $(this).click(function(){$('#textholder'+randID+'_'+(i+1)).animate({marginBottom:(-imgHeight*o.textholderHeight)-containerBorder-1+'px'},500)});
      });
      $('.minmax',obj).each(function(i){ // Same reason as previous chunk
        $(this).click(function(){
          if(parseInt($('#textholder'+randID+'_'+(i+1)).css('margin-bottom'))==0)
          {
            $('#textholder'+randID+'_'+(i+1)).animate({marginBottom:((-imgHeight*o.textholderHeight)-containerBorder+12)+'px'},500,function(){
              $('#minmax'+randID+'_'+(i+1)).css('background-position','0 -16px')});
          }
          else
          {
            $('#textholder'+randID+'_'+(i+1)).animate({marginBottom:'0px'},500,function(){
              $('#minmax'+randID+'_'+(i+1)).css('background-position','0 -8px')});
          }

        });
      });

      function showtext(t,i)
      {
        if(autopilot)
        {
          $('#minmax'+randID+'_'+i).hide();
          $('#close'+randID+'_'+i).hide();
        }
        if(t != null)
        {
          $('#textholder'+randID+'_'+i+' span').html(t); // Change textholder content
          $('#textholder'+randID+'_'+i).stop().animate({marginBottom:'0px'},500); // Raise textholder
          $('#minmax'+randID+'_'+i).css('background-position','0 -8px');
          showminmax();
        }
      }

      function showminmax()
      {
        if(!autopilot)
        {
          $('.minmax',obj).fadeIn(250);
          $('.close',obj).fadeIn(250);
        }
      }

      function hideCaption() {$('.textholder',obj).stop().animate({marginBottom:(-imgHeight*o.textholderHeight-containerBorder-1)+'px'},o.transitionSpeed)}

      if(o.displayThumbnails)
      {
        function thumbclick(event)
        {
          target_num = this.id.split('_'); // we want target_num[1]
          if(viewable[0] != target_num[1])
          {
            status='pause';
            $('#progress'+randID).stop().fadeOut();
            clearTimeout(clearInt);
            $('#thumbs'+randID+' div').css({'cursor':'default'}).unbind('click'); // Unbind the thumbnail click event until the transition has ended
            autopilot = 0;
            setTimeout(function(){$('#play_pause_btn'+randID).css('background-position','0 -16px')},o.transitionSpeed);
            $('#play_pause_btn'+randID).unbind('click').bind('click',function(){forceStart();});
          }
          if(target_num[1] > viewable[0])
          {
            diff = target_num[1] - viewable[0];
            moveLeft(diff);
          }
          if(target_num[1] < viewable[0])
          {
            diff = viewable[0]- target_num[1];
            moveRight(diff);
          }
        }

        var viewable = []; // track which images are being displayed
        var unviewable = []; // track which images are being displayed
        // Build thumbnail viewer and thumbnail divs
        $(obj).after('<div id="thumbs'+randID+'" style="position:relative;overflow:auto;clear:left;text-align:left;padding-top:5px;"></div>');
        for(i=0;i<=numImages-1;i++)
        {
          thumb = $('img:eq('+(i+1)+')', obj).attr('src');
          $('#thumbs'+randID).append('<div class="thumb" id="thumb'+randID+'_'+(i+1)+'" style="cursor:pointer;background-image:url('+thumb+');display:inline;float:left;width:'+o.thumbnailWidth+';height:'+o.thumbnailHeight+';line-height:'+o.thumbnailHeight+';padding:0;overflow:hidden;text-align:center;border:2px solid #ccc;margin-right:4px;font-size:'+o.thumbnailFontSize+';font-family:Arial;color:#000;text-shadow:0 0 3px #fff">'+(i+1)+'</div>');
          if(i<=o.inView) $('#thumb'+randID+'_'+i).css({'border-color':'#ff0000'});
          unviewable.push(i+1);
        }
        // Initialize viewable/unviewable arrays
        for(i=1;i<=o.inView;i++) viewable.push(unviewable.shift());

        // Next two lines are a special case to handle the first list element which was originally the last
        thumb = $('img:first', obj).attr('src');
        $('#thumb'+randID+'_'+numImages).css({'background-image':'url('+thumb+')'});
        $('#thumbs'+randID+' div.thumb:not(:first)').css({opacity:.65}); // makes all thumbs 65% opaque except the first one

        $('#thumbs'+randID+' div.thumb').hover(function(){$(this).animate({'opacity':1},150)},function(){if(viewable[0]!=this.id.split('_')[1]) $(this).animate({'opacity':.65},250)}); // add hover to thumbs
        // Assign click handler for the thumbnails. Normally the format $('.thumb') would work but since it's outside of our object (obj) it would get called multiple times
        $('#thumbs'+randID+' div').bind('click', thumbclick); // We use bind instead of just plain click so that we can repeatedly remove and reattach the handler
        
        if(!o.displayThumbnailNumbers) $('#thumbs'+randID+' div').text('');
        if(!o.displayThumbnailBackground) $('#thumbs'+randID+' div').css({'background-image':'none'});
      }

      if(o.showControls)
      {
        // Pause/play button(img)
        html = '<div id="play_pause_btn'+randID+'" style="cursor:pointer;position:absolute;top:3px;right:3px;border:none;width:16px;height:16px;background:url('+o.imagePath+'playpause.gif) no-repeat 0 0"></div>';
        $(obj).append(html);
        var status = 'play';
        $('#play_pause_btn'+randID).css('opacity',.5).hover(function(){$(this).animate({opacity:'1'},250)},function(){$(this).animate({opacity:'.5'},250)});
        $('#play_pause_btn'+randID).click(function(){
          status = (status == 'play') ? 'pause':'play';
          (status=='play') ? forceStart():forcePause();
        });

        if(!o.prevNextInternal)
        {
          wrapID = $(obj).attr('id')+'Wrapper';
          $(obj).wrap('<div id="'+wrapID+'"></div>').css('margin','0 auto');
          $('#'+wrapID).css('position','relative').width(($(obj).width()+40+parseInt($(obj).css('padding-left'))+parseInt($(obj).css('padding-right'))));
        }

        // Prev/next button(img)
        arrowsTop = ((imgHeight/2)-15)+parseInt(o.padding);
        html = '<div id="btn_rt'+randID+'" style="position:absolute;right:2px;top:'+arrowsTop+'px;cursor:pointer;border:none;width:13px;height:30px;background:url('+o.imagePath+'leftright.gif) no-repeat 0 0"></div>';
        html += '<div id="btn_lt'+randID+'" style="position:absolute;left:2px;top:'+arrowsTop+'px;cursor:pointer;border:none;width:13px;height:30px;background:url('+o.imagePath+'leftright.gif) no-repeat -13px 0"></div>';
        (o.prevNextInternal) ? $(obj).append(html):$('#'+wrapID).append(html);

        $('#btn_rt'+randID).css('opacity',.5).click(function(){
          forcePrevNext('next');
        }).hover(function(){$(this).animate({opacity:'1'},250)},function(){$(this).animate({opacity:'.5'},250)});
        $('#btn_lt'+randID).css('opacity',.5).click(function(){
          forcePrevNext('prev');
        }).hover(function(){$(this).animate({opacity:'1'},250)},function(){$(this).animate({opacity:'.5'},250)});

        if(o.autoHideControls && o.prevNextInternal)
        {
          function showcontrols()
          {
            $('#play_pause_btn'+randID).stop().animate({top:'3px',right:'3px'},250);
            $('#btn_rt'+randID).stop().animate({top:arrowsTop+'px',right:'2px'},250);
            $('#btn_lt'+randID).stop().animate({top:arrowsTop+'px',left:'2px'},250);
          }
          function hidecontrols()
          {
            $('#play_pause_btn'+randID).stop().animate({top:-16-containerBorder+'px',right:-16-containerBorder+'px'},250);
            $('#btn_rt'+randID).stop().animate({right:'-16px'},250);
            $('#btn_lt'+randID).stop().animate({left:'-16px'},250);
          }
          $(obj).hover(showcontrols,hidecontrols);
          hidecontrols();
        }
        if(o.autoHideCaptions)
        {
          var isHover;
          function autoShowCap(){isHover=true;for(i=1;i<=o.inView;i++) showtext($('li:eq('+i+') p', obj).html(),i);}
          function autoHideCap(){isHover=false;hideCaption();}
          $(obj).hover(autoShowCap,autoHideCap);
          hideCaption();
        }
      }

      function keyBind(){
        if(o.enableKeyboardNav)
        {
          $(document).keydown(function(event){
            if(event.keyCode == 39)
            {
              forcePrevNext('next');
              $(document).unbind('keydown');
            }
            if(event.keyCode == 37)
            {
              forcePrevNext('prev');
              $(document).unbind('keydown');
            }
            if(event.keyCode == 80 || event.keyCode == 111) forcePause();
            if(event.keyCode == 83 || event.keyCode == 115)
            {
              forceStart();
              $(document).unbind('keydown');
            }
          });
        }
      }

      function forcePrevNext(dir)
      {
        o.onPauseClick.call(this);
        $('#btn_rt'+randID).unbind('click');
        $('#btn_lt'+randID).unbind('click');
        setTimeout(function(){$('#play_pause_btn'+randID).css('background-position','0 -16px')},o.transitionSpeed-1);
        autopilot = 0;
        $('#progress'+randID).stop().fadeOut();
        status='pause';
        clearTimeout(clearInt);
        (dir=='prev') ? moveRight():moveLeft();
        $('#play_pause_btn'+randID).unbind('click');
        setTimeout(function(){
            $('#play_pause_btn'+randID).bind('click',function(){forceStart();});
            $('#btn_rt'+randID).bind('click',function(){forcePrevNext('next')});
            $('#btn_lt'+randID).bind('click',function(){forcePrevNext('prev')});
          },o.transitionSpeed);
      }

      function forcePause()
      {
        $('#play_pause_btn'+randID).unbind('click'); // unbind the click, wait for transition, then reenable
        if(autopilot)
        {
          o.onPauseClick.call(this);
          $('#play_pause_btn'+randID).fadeTo(250,0,function(){$(this).css({'background-position':'0 -16px','opacity':'.5'});}).animate({opacity:.5},250);
          autopilot = 0;
          showminmax();
          $('#progress'+randID).stop().fadeOut();
          clearTimeout(clearInt);
          setTimeout(function(){$('#play_pause_btn'+randID).bind('click',function(){forceStart();})},o.transitionSpeed);
        }
      }

      function forceStart()
      {
        $('#play_pause_btn'+randID).unbind('click'); // unbind the click, wait for transition, then reenable
        if(!autopilot)
        {
          setTimeout(function(){$('#play_pause_btn'+randID).css('background-position','0 0')},o.transitionSpeed-1);
          autopilot = 1;
          moveLeft();
          clearInt=setInterval(function(){moveLeft();},o.displayTime+o.transitionSpeed);
          setTimeout(function(){$('#play_pause_btn'+randID).bind('click',function(){forcePause();})},o.transitionSpeed);
        }
      }

      function preMove()
      {
        hideCaption();
        // Fade out play/pause/left/right
        if(o.showControls && o.prevNextInternal)
        {
          $('#play_pause_btn'+randID).fadeOut(200);
          $('#btn_lt'+randID).fadeOut(200);
          $('#btn_rt'+randID).fadeOut(200);
        }
        if(o.displayThumbnails) for(i=1;i<=numImages;i++) $('#thumb'+randID+'_'+i).css({'border-color':'#ccc'}).animate({'opacity': .65},500);
      }

      function postMove()
      {
        if(o.showControls && o.prevNextInternal)
        {
          $('#play_pause_btn'+randID).fadeIn(200);
          $('#btn_lt'+randID).fadeIn(200);
          $('#btn_rt'+randID).fadeIn(200);
        }
        keyBind();
        if(o.autoHideCaptions && isHover) autoShowCap();
        if(o.displayThumbnails) for(i=0;i<viewable.length;i++) $('#thumb'+randID+'_'+viewable[i]).css({'border-color':'#ff0000'}).animate({'opacity': 1},500);
        if(!o.autoHideCaptions) for(i=1;i<=o.inView;i++) showtext($('li:eq('+i+') p', obj).html(),i);
        if(o.displayThumbnails) $('#thumbs'+randID+' div').unbind('click').bind('click', thumbclick).css({'cursor':'pointer'});
        ary=[];
        for(x=1;x<=o.inView;x++){ary.push($('img:eq('+x+')',obj).attr('src'))}
        o.onSlideEnd.call(this,ary);
      }

      function moveLeft(dist)
      {
        if(dist==null) dist=o.advance;
        preMove();
        if(o.displayThumbnails)
        {
          for(i=1;i<=dist;i++){
            viewable.push(unviewable.shift());
            unviewable.push(viewable.shift());
          }
        }
        if(o.displayTime == 0){clearInterval(clearInt);} // If running a contonuous show with no display time, fist clear the interval. Then below, recursively call moveLeft
        $('li:lt('+dist+')', obj).clone(true).insertAfter($('li:last', obj)); // Copy the first image (offscreen to the left) to the end of the list (offscreen to the right)
        o.onSlideStart.call(this,viewable,'left');
        $('ul', obj).animate({left:-imgWidth*(dist+1)-(parseInt(o.padding)*(dist+1))*2},o.transitionSpeed,o.easeLeft,function(){ // Animate the entire list to the left
          $('li:lt('+dist+')', obj).remove(); // When the animation finishes, remove the first image (on the left). It has already been copied to the end of the list (right)
          $(this).css({'left':-imgWidth-parseInt(o.padding)*2});
          if(o.displayProgressBar && autopilot) startProgressBar();
          postMove();
          if(o.displayTime == 0){moveLeft();}
        });
      }
      function moveRight(dist)
      {
        if(dist==null) dist=o.advance;
        preMove();
        if(o.displayThumbnails)
        {
          for(i=1;i<=dist;i++){
            viewable.unshift(unviewable.pop());
            unviewable.unshift(viewable.pop());
          }
        }
        $('li:gt('+(numImages-(dist+1))+')', obj).clone(true).insertBefore($('li:first', obj)); // Copy rightmost (last) li and insert it after the first li
        o.onSlideStart.call(this,viewable,'right');
        $('ul', obj).css('left',-(imgWidth*(dist+1))-(parseInt(o.padding)*((dist+1)*2)))
          .animate({left:-imgWidth-(parseInt(o.padding)*2)},o.transitionSpeed,o.easeRight,function(){
            $('li:gt('+(numImages-1)+')', obj).remove();
            postMove();
          });
      }

      // Kickoff the show
      if(autopilot)
      {
        var clearInt = setInterval(function(){moveLeft();},o.displayTime+o.transitionSpeed);
        if(o.displayProgressBar) startProgressBar(o.displayTime+o.transitionSpeed);
      } else {status='pause';$('#play_pause_btn'+randID).css({'background-position':'0 -16px'});}
      keyBind();
     });
  }
  });
})(jQuery);