$(window).unload(function()
{
    $('div.player').html('');
});

(function($)
{
    function generatePlaylistID()
    {
        var i = 1;
        while(true)
	{
            if($('.playlist' + i).length == 0)
                return 'playlist' + i;
            else
                i++;
        }
    }
    
    function setPlayer(el, url, id, settings)
    {
        var flashWidth = settings.progressBarWidth + settings.barSpace + settings.volumeBarWidth;
        var flashHeight = Math.max(settings.volumeSliderHeight, settings.progressSliderHeight);
        
	var settingsStr = '&backgroundColor=' + settings.backgroundColor +
	    '&volumeBarWidth=' + settings.volumeBarWidth +
	    '&progressBarWidth=' + settings.progressBarWidth + 
	    '&barSpace=' + settings.barSpace + 
	    '&volumeBarColor=' + settings.volumeBarColor + 
	    '&volumeBarHeight=' + settings.volumeBarHeight + 
	    '&volumeSliderWidth=' + settings.volumeSliderWidth + 
	    '&volumeSliderHeight=' + settings.volumeSliderHeight + 
	    '&volumeSliderColor=' + settings.volumeSliderColor + 
	    '&progressBarHeight=' + settings.progressBarHeight + 
	    '&progressSliderWidth=' + settings.progressSliderWidth + 
	    '&progressSliderHeight=' + settings.progressSliderHeight + 
	    '&progressSliderColor=' + settings.progressSliderColor + 
	    '&progressBarColor=' + settings.progressBarColor + 
	    '&bufferColor=' + settings.bufferColor;
	
	$(el).html('<embed wmode=\"transparent\" type="application/x-shockwave-flash" src="' + settings.playerurl + '" width="' + flashWidth + '" height="' + flashHeight + '" style="undefined" id="player' + id + '" name="player' + id + '" quality="high" swliveconnect="true" allowscriptaccess="sameDomain" flashvars="url=' + url + '&amp;id=' + id + settingsStr + '">');
	$(el).removeClass('inactive');
    }
    
    function getFlashMovie(id)
    {
        var isIE = navigator.appName.indexOf('Microsoft') != -1;
        return (isIE) ? document['player' + id] : document['player' + id];
    }
    
    function invokeFlashMethod(id, methodName, arg1, arg2, arg3)
    {
	var flsh = getFlashMovie(id);
	var isIE = navigator.appName.indexOf('Microsoft') != -1;
	var res = null;
	if (isIE)
	{
	    var args = [];
	    if (arg1)
		args.enqueue(arg1);
	    if (arg2)
		args.enqueue(arg2);
	    if (arg3)
		args.enqueue(arg3);
	    var xmlArgs = window.self.__flash__argumentsToXML(args, 0);
	    var xml = '<invoke name=\"';
	    xml = xml + methodName;
	    xml = xml + '\" returntype=\"javascript\">';
	    xml = xml + xmlArgs;
	    xml = xml + '</invoke>';
	    var funcRes = flsh.callFunction(xml);
	    if((funcRes != null) && (funcRes != undefined))
		res = eval(funcRes);
	}
	else
	{
	    if (!arg1)
		res = flsh[methodName]();
	    else if (arg1 && !arg2)
		res = flsh[methodName](arg1);
	    else if (arg1 && arg2 && !arg3)
		res = flsh[methodName](arg1, arg2);
	    else
		res = flsh[methodName](arg1, arg2, arg3);
	}
	return res;
    }
    
    function removePlayer(el)
    {
        $(el).addClass('inactive').empty();
    }
    
    function playTrack(el, id)
    {
        $(el).addClass('current');
        var settings = $(el).data('settings');
        setPlayer($(el).find('div.player'), $(el).attr('title'), id, settings);
        $.each($(el).find('.btn'), function()
	{
            if($(this).hasClass('pause'))
                $(this).removeClass('pause').addClass('play');
            else
                if ($(this).hasClass('play'))
		    $(this).removeClass('play').addClass('pause');
        });
    }
    
    function pause(el)
    {
        $(el).each(function()
	{
            var id = $(this).data('id');
	    el.find('.current').find('.btn').removeClass('play').removeClass('pause').addClass('play');
	    el.find('.current').addClass('paused');
	    invokeFlashMethod(id, 'pause');
        });
    }
    
    function resume(el)
    {
        $(el).each(function()
	{
            var id = $(this).data('id');
	    el.find('.current').removeClass('paused');
	    el.find('.current').find('.btn').removeClass('play').removeClass('pause').addClass('pause');
	    invokeFlashMethod(id, 'play');
        });
    }
    
    function stop(el)
    {
        $.each($(el).find('.item'), function()
	{
            $(this).removeClass('current').removeClass('paused');
            removePlayer($(this).find('div.player'));
            $.each($(this).find('.btn'), function()
	    {
                $(this).removeClass('pause').addClass('play');
            });
        });
    }
    
    var methods =
    {
        init: function(options)
	{
            var settings =
	    {
                backgroundColor      : 0xFFFFFF,
                volumeBarWidth       : 40,
                progressBarWidth     : 340,
                barSpace             : 20,               
                volumeBarColor       : 0x05265e,
                volumeBarHeight      : 1,
                volumeSliderWidth    : 10,
                volumeSliderHeight   : 5,
                volumeSliderColor    : 0x05265e,                
                progressBarHeight    : 1,
                progressSliderWidth  : 10,
                progressSliderHeight : 5,
                progressBarColor     : 0xdddddd,
                progressSliderColor  : 0x05265e,
                bufferColor          : 0x05265e,
		playerurl	     : 'drplayer.swf'    
            }
	    
            if (options)
                $.extend( settings, options );
            
            return this.each(function()
	    {
                var el = $(this);
                var id = generatePlaylistID();
                $(el).data('id', id);
                $(el).addClass(id);
                
		//init
                $.each($(el).find('.item'), function()
		{
                    var item = $(this);        
                    $(this).data('settings', settings);   
                    $(this).find('.btn').click(function()
		    {
                        if ($(item).hasClass('paused'))
			{
                            $(item).removeClass('paused');
                            $(this).removeClass('play').addClass('pause');
                            resume(el);
                        }
			else if ($(item).hasClass('current'))
			{
                            $(this).removeClass('pause').addClass('play');
                            $(item).addClass('paused');
                            pause(el);
                        }
			else
			{
                            stop(el);
                            playTrack(item, id);
                        }
                    });
		    $(document).ready(function()
		    {
                        if ($(item).hasClass('paused'))
			{
                            $(item).removeClass('paused');
                            $(this).removeClass('play').addClass('pause');
                            resume(el);
                        }
			else if ($(item).hasClass('current'))
			{
                            $(this).removeClass('pause').addClass('play');
                            $(item).addClass('paused');
                            pause(el);
                        }
			else
			{
                            stop(el);
                            playTrack(item, id);
                        }
                    });
                });
            });
        },
        next: function()
	{
            return this.each(function()
	    {
                var el = $(this);
                var items = el.find('.item')
                var index = -1;
                for (var i = 0; i < items.length; i++)
                    if ($(items[i]).hasClass('current'))
                        index = i;
                /*
		if (index != -1)
                    stop(el);
                if (index != -1 && index < items.length - 1)
		{
                    var next = $(items[index]); 
                    playTrack(next, $(el).data('id'));
                }
		*/
		var next = $(items[0]); 
		playTrack(next, $(el).data('id'));
            });
        },
        prev: function()
	{
            return this.each(function()
	    {
                var el = $(this);
                var items = el.find('.item')
                var index = -1;
                for (var i = 0; i < items.length; i++)
                    if ($(items[i]).hasClass('current'))
                        index = i;
                if (index != -1)
                    stop(el);
                if (index > 0 && index < items.length)
		{
                    var prev = $(items[index - 1]); 
                    playTrack(prev, $(el).data('id'));
                }
            });
        },
        pause:function()
	{
            return this.each(function()
	    {
                var el = $(this);
                pause(el);
            });        
        },
        play:function()
	{
            return this.each(function()
	    {
                var el = $(this);
                if ($(el).find('.current').length == 0)
		{
                    var tr = $(el).find('.item:first');
                    playTrack(tr, $(el).data('id'));
                }
		else
                    resume(el);
            });      
        }
    };
    
    $.fn.playlist = function(method)
    {
        if (methods[method])
            return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
        else if (typeof method === 'object' || !method)
            return methods.init.apply(this, arguments);
        else
            $.error('Method ' + method + ' does not exist');
	return true;
    };
})(jQuery);