//-------------------------------------------------
//		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) {
            if (url.startsWith("http://www.youtube.com/embed/")) {
                ytid = url.replace("http://www.youtube.com/embed/", "");
            }
            else {
                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 + "' style='width: 30px; border: none' />";
                    $link.empty().html(thumbHtml).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();
    });

};