$(document).ready(function(){
    var Playlist = function(instance, playlist, options) {
        var self = this;
 
        this.instance = instance; // String: To associate specific HTML with this playlist
        this.playlist = playlist; // Array of Objects: The playlist
        this.options = options; // Object: The jPlayer constructor options for this playlist
 
        this.current = 0;
 
        this.cssId = {
            jPlayer: "jquery_jplayer_",
            interface: "jp_interface_",
            playlist: "jp_playlist_"
        };
        this.cssSelector = {};
 
        $.each(this.cssId, function(entity, id) {
            self.cssSelector[entity] = "#" + id + self.instance;
        });
 
        if(!this.options.cssSelectorAncestor) {
            this.options.cssSelectorAncestor = this.cssSelector.interface;
        }
 
        $(this.cssSelector.jPlayer).jPlayer(this.options);
 
        $(this.cssSelector.interface + " .jp-previous").click(function() {
            self.playlistPrev();
            $(this).blur();
            return false;
        });
 
        $(this.cssSelector.interface + " .jp-next").click(function() {
            self.playlistNext();
            $(this).blur();
            return false;
        });
    };
 
    Playlist.prototype = {
        displayPlaylist: function() {
            var self = this;
            $(this.cssSelector.playlist + " ul").empty();
            for (i=0; i < this.playlist.length; i++) {
                var listItem = (i === this.playlist.length-1) ? "<li class='jp-playlist-last'>" : "<li>";
                listItem += "<a href='#' id='" + this.cssId.playlist + this.instance + "_item_" + i +"' tabindex='1'>"+ this.playlist[i].name +"</a>";
 
                // Create links to free media
                if(this.playlist[i].free) {
                    var first = true;
                    listItem += "<div class='jp-free-media'>(";
                    $.each(this.playlist[i], function(property,value) {
                        if($.jPlayer.prototype.format[property]) { // Check property is a media format.
                            if(first) {
                                first = false;
                            } else {
                                listItem += " | ";
                            }
                            listItem += "<a id='" + self.cssId.playlist + self.instance + "_item_" + i + "_" + property + "' href='" + value + "' tabindex='1'>" + property + "</a>";
                        }
                    });
                    listItem += ")</span>";
                }
 
                listItem += "</li>";
 
                // Associate playlist items with their media
                $(this.cssSelector.playlist + " ul").append(listItem);
                $(this.cssSelector.playlist + "_item_" + i).data("index", i).click(function() {
                    var index = $(this).data("index");
                    if(self.current !== index) {
                        self.playlistChange(index);
                    } else {
                        $(self.cssSelector.jPlayer).jPlayer("play");
                    }
                    $(this).blur();
                    return false;
                });
 
                // Disable free media links to force access via right click
                if(this.playlist[i].free) {
                    $.each(this.playlist[i], function(property,value) {
                        if($.jPlayer.prototype.format[property]) { // Check property is a media format.
                            $(self.cssSelector.playlist + "_item_" + i + "_" + property).data("index", i).click(function() {
                                var index = $(this).data("index");
                                $(self.cssSelector.playlist + "_item_" + index).click();
                                $(this).blur();
                                return false;
                            });
                        }
                    });
                }
            }
        },
        playlistInit: function(autoplay) {
            if(autoplay) {
                this.playlistChange(this.current);
            } else {
                this.playlistConfig(this.current);
            }
        },
		playlistConfig: function(index) {
            $(this.cssSelector.playlist + "_item_" + this.current).removeClass("jp-playlist-current").parent().removeClass("jp-playlist-current");
            $(this.cssSelector.playlist + "_item_" + index).addClass("jp-playlist-current").parent().addClass("jp-playlist-current");
            this.current = index;
            $(this.cssSelector.jPlayer).jPlayer("setMedia", this.playlist[this.current]);
			$("#jp-current-track").html(this.playlist[this.current].name); // current track name
        },
        playlistChange: function(index) {
            this.playlistConfig(index);
            $(this.cssSelector.jPlayer).jPlayer("play");
			$("#jp-current-track").html(this.playlist[this.current].name); // current track name
        },
        playlistNext: function() {
            var index = (this.current + 1 < this.playlist.length) ? this.current + 1 : 0;
            this.playlistChange(index);
        },
        playlistPrev: function() {
            var index = (this.current - 1 >= 0) ? this.current - 1 : this.playlist.length - 1;
            this.playlistChange(index);
        }
    };
 
    var audioPlaylist = new Playlist("1", [
        {
            name:"Crumbs For Comfort - Tide Song",
            mp3:"/aud/tide.mp3",
            oga:"/aud/tide.ogg"
        },
        {
            name:"Crumbs For Comfort - Sweet Rose",
            mp3:"/aud/rose.mp3",
            oga:"/aud/rose.ogg"
        },
        {
            name:"Crumbs For Comfort - Lowestoft Bay",
            mp3:"/aud/lowy.mp3",
            oga:"/aud/lowy.ogg"
        } 
    ], {
        ready: function() {
            audioPlaylist.displayPlaylist();
            audioPlaylist.playlistInit(false); // Parameter is a boolean for autoplay.
        },
        ended: function() {
            audioPlaylist.playlistNext();
        },
        play: function() {
            $(this).jPlayer("pauseOthers");
        },
        swfPath: "/js",
        supplied: "oga, mp3"
    });
 
});