//-------------------------------------------------
//      youtube playlist jquery plugin
//      Created by dan@geckonm.com
//      www.geckonewmedia.com
//
//      v1.1 - updated to allow fullscreen 
//           - thanks Ashraf for the request
//      v1.2 - updated to allow for mixed yt/image galleries
//           - for Markus Thyberg
//-------------------------------------------------

String.prototype.startsWith = function(str){
    return (this.indexOf(str) === 0);
}


jQuery.fn.ytplaylist = function(options) {
 
  // default settings
  var options = jQuery.extend( {
    holderId: 'ytvideo',
    playerHeight: 300,
    playerWidth: 450,
    addThumbs: false,
    thumbSize: 'small',
    showInline: false,
    autoPlay: true,
    showRelated: true,
    allowFullScreen: false
  },options);
 
  return this.each(function() {
                            
        var $el = $(this);
        
        var autoPlay = "";
        var showRelated = "&rel=0";
        var fullScreen = "";
        if(options.autoPlay) autoPlay = "&autoplay=1"; 
        if(options.showRelated) showRelated = "&rel=1"; 
        if(options.allowFullScreen) fullScreen = "&fs=1"; 
        
        //throw a youtube player in
        function playOld(id) {
           var html  = '';
    
           html += '<object height="'+options.playerHeight+'" width="'+options.playerWidth+'">';
           html += '<param name="movie" value="http://www.youtube.com/v/'+id+autoPlay+showRelated+fullScreen+'"> </param>';
           html += '<param name="wmode" value="transparent"> </param>';
           if(options.allowFullScreen) { 
                html += '<param name="allowfullscreen" value="true"> </param>'; 
           }
           html += '<embed src="http://www.youtube.com/v/'+id+autoPlay+showRelated+fullScreen+'"';
           if(options.allowFullScreen) { 
                html += ' allowfullscreen="true" '; 
            }
           html += 'type="application/x-shockwave-flash" wmode="transparent"  height="'+options.playerHeight+'" width="'+options.playerWidth+'"></embed>';
           html += '</object>';
            
           return html;
        };
        
        
        function playNew (id) {
          var html = '';
          html += '<iframe width="'+ options.playerWidth +'" height="'+ options.playerHeight +'"';
          html += ' src="http://www.youtube.com/embed/'+ id +'" frameborder="0"';
          html += ' allowfullscreen></iframe>';

          return html;
        }
        
        
        //grab a youtube id from a (clean, no querystring) url (thanks to http://jquery-howto.blogspot.com/2009/05/jyoutube-jquery-youtube-thumbnail.html)
        function youtubeid(url) {
            var ytid = url.match("[\\?&]v=([^&#]*)");
            ytid = ytid[1];
            return ytid;
        };
        
        
        
        //
        $el.children('li').each(function() {
            $(this).find('a').each(function() {
                var thisHref = $(this).attr('href');
                
                //old-style youtube links
                if (thisHref.startsWith('http://www.youtube.com')) {
                    $(this).addClass('yt-vid');
                    $(this).data('yt-id', youtubeid(thisHref) );
                }
                //new style youtu.be links
                else if (thisHref.startsWith('http://youtu.be')) {
                    $(this).addClass('yt-vid');
                    var id = thisHref.substr(thisHref.lastIndexOf("/") + 1);
                    $(this).data('yt-id', id );
                }
                else {
                    //must be an image link (naive)
                    $(this).addClass('img-link');
                }
                
               // alert(thisHref);
            });
        });
        
        
        //load video on request
        $el.children("li").children("a.yt-vid").click(function() {
            
            if(options.showInline) {
                $("li.currentvideo").removeClass("currentvideo");
                $(this).parent("li").addClass("currentvideo").html(playNew($(this).data("yt-id")));
            }
            else {
                $("#"+options.holderId+"").html(playNew($(this).data("yt-id")));
                $(this).parent().parent("ul").find("li.currentvideo").removeClass("currentvideo");
                $(this).parent("li").addClass("currentvideo");
            }   
            return false;
        });

        $el.find("a.img-link").click(function() {
            var $img = $('<img/>');
            $img.attr({
                    src:$(this).attr('href') })
                .css({
                    display: 'none',
                    position: 'absolute',
                    left: '0px',
                    top: '50%'});

            if(options.showInline) {
                $("li.currentvideo").removeClass("currentvideo");
                $(this).parent("li").addClass("currentvideo").html($img);
            }
            else {
                
                $("#"+options.holderId+"").html($img);
                $(this).closest("ul").find("li.currentvideo").removeClass("currentvideo");
                $(this).parent("li").addClass("currentvideo");
                
            }
            //wait for image to load (webkit!), then set width or height
            //based on dimensions of the image
            setTimeout(function() {
                if ( $img.height() < $img.width() ) {
                    $img.width(options.playerWidth).css('margin-top',parseInt($img.height()/-2, 10)).css({
                        height: 'auto'
                    });
                }
                else {
                    $img.css({
                        height: options.playerHeight,
                        width: 'auto',
                        top: '0px',
                        position: 'relative'
                    });
                }
                $img.fadeIn();
            }, 100);
            
            
            return false;
        });
        
        
        //do we want thumns with that?
        if(options.addThumbs) {
            
            $el.children().each(function(i){
                
                //replace first link
                var $link = $(this).find('a:first');
                var replacedText = $(this).text();
                
                if ($link.hasClass('yt-vid')) {
                    
                    if(options.thumbSize == 'small') {
                        var thumbUrl = "http://img.youtube.com/vi/"+$link.data("yt-id")+"/2.jpg";
                    }
                    else {
                        var thumbUrl = "http://img.youtube.com/vi/"+$link.data("yt-id")+"/0.jpg";
                    }

                    var thumbHtml = "<img src='"+thumbUrl+"' alt='"+replacedText+"' />";
                    $link.empty().html(thumbHtml+replacedText).attr("title", replacedText);
                    
                }
                else {
                    //is an image link
                    var $img = $('<img/>').attr('src',$link.attr('href'));
                    $link.empty().html($img).attr("title", replacedText);
                }   
                
            }); 
            
        }
        
        //load inital video
        var firstVid = $el.children("li:first-child").addClass("currentvideo").children("a").click();
        
            
        
   
  });
 
};