(function($) {
    $.fn.carousel3D = function(options) {
    
    var parentContainer = this;
    var settings = $.extend({
        speed: 350,
        perspectiveZoom : 80,
        sideOffset: 70,
        topOffset:0,
        emClass: "tdc-element",
        secondaryOpacity:0.8,
        states : []
    }, options);

    var emClass = settings.emClass;
    var elements = this.find("."+emClass);
    var mutex = false;
    this.find("."+emClass).css("position","absolute");
    this.find("."+emClass).css("display","block");
    $(this).css("position","relative");
    var lastEm = elements.length - 1;
	
    var initW = 539;
    var initH = 288;
	
    var initWS = initW * settings.perspectiveZoom/100;
    var initHS = initH * settings.perspectiveZoom/100;
	var movestate = 'play';
	var ndirection = '';

    settings.states = [
        {height:initHS, width:initWS, top:(initH-initHS)/2+settings.topOffset, left:0, opacity:settings.secondaryOpacity},
        {height:initH, width:initW, top:0, left:settings.sideOffset, opacity:100},
        {height:initHS,width:initWS, top:(initH-initHS)/2+settings.topOffset, left:2*settings.sideOffset+initW - initWS, opacity:settings.secondaryOpacity}
    ];

    for(var j=3;j<=lastEm;j++){
        settings.states[j] = {height:0, width:0, top:(initH)/2, left:settings.sideOffset+initW/2, opacity:0};
    }
	
	parentContainer.bind('pause', function(){
		movestate = 'pause';
	});
	
	parentContainer.bind('play', function(){
		movestate = 'play';
	});
	
	parentContainer.bind('next',function(){
		nextslide();				 
	});
	
	parentContainer.bind('prev',function(){
		prevslide();
	});
	
	function nextslide()
	{
		ndirection = 'next';
		transit(true);
	}
	
	function prevslide()
	{
		ndirection = 'prev';
		transit(false);
	}

	
    function transit(direction) {
	
        if(mutex==true)
		{
			return;
		}

		//console.debug('direction: '+direction);
		//console.debug('mutex moving:'+direction);
		if(movestate == 'pause' && ndirection == '')
		{
			mutex = false;
			return;
		}
		mutex = true;
        $(elements).each(function(i){
            $(elements[i]).animate(settings.states[direction ? (i == 0 ? lastEm : i - 1) : (i == lastEm ? 0 : i + 1)], settings.speed, 'swing', function(){
				
				
				
                if (i==lastEm){
					if(ndirection=='prev')
					{
						transit(false);
					}
					if(ndirection=='next')
					{
						transit(true);
					}
					ndirection='';
                    var prevState = elements;
                    elements = [];
                    elements[0] = prevState[direction ? 1 : lastEm];
                    elements[lastEm] = prevState[direction ? 0 : lastEm-1];
                    for(var j=1;j<lastEm;j++)
                        elements[j] = prevState[direction ? j+1 : j-1];
    
                    $(elements).each(function(){
                       $(elements[1]).css({zIndex: 200});
                       $(elements[2]).css({zIndex: 100});
                       $(elements[0]).css({zIndex: 100});
                       for(var j = 3; j<=lastEm;j++)
                           $(elements[j]).css({zIndex: 1});
                    });
                    mutex = false;
					//console.debug('mutex stopped');
                }
            });
        });
    
        setTimeout(function(){
            $(elements[0]).css({zIndex: direction ? 100 : 200});
            $(elements[1]).css({zIndex: 100});
            $(elements[2]).css({zIndex: direction ? 200 : 100});
            for (var j = 3; j<=lastEm;j++)
                $(elements[j]).css({zIndex: 1});
        }, settings.speed / 2);

    }

    $(elements).each(function(){
	if(settings.autorotate) { setInterval(function(){ if(mutex) { return; } if(this === elements[0]) { transit(false); } else { transit(true) } }, settings.autorotatespeed); } 
        $(this).click(function(e){
            if(mutex) {
                return;
            }
            if(this === elements[0]) {
                transit(false)
            }
            else {
                //transit(true)
            }
        });
    });

    $(elements).each(function(i){
        $(elements[i]).animate(settings.states[i], settings.speed, 'swing')
        $(elements[1]).css({zIndex: 200});
        $(elements[2]).css({zIndex: 100}); $(elements[0]).css({zIndex:100});
        for (var j = 3; j<=lastEm;j++)
            $(elements[lastEm]).css({zIndex: 1});
    });

    return this;
};
})(jQuery);