(function($) {
	function Gallery(el, options) {
		this._hold = $(el);
		this.initOptions(options);
		this._timer = options.autoRotation;
		this._t;
		this.initialize();
	}
	
	$.fn.gallery = function(options) {
		$(this).each(function() {
            return new Gallery(this, options);
        });
	};
	
	Gallery.prototype = {
		initOptions: function(_obj){
			this.options = {
				duration: 500,
				slideElement: 1,
				autoRotation: false,
				effect: false,
				listOfSlides: 'ul > li',
				switcher: false,
				disableBtn: false,
				nextBtn: 'a.link-next, a.btn-next, a.next',
				prevBtn: 'a.link-prev, a.btn-prev, a.prev',
				circle: true,
				direction: false,
				IE: false
			};
			for(key in _obj) this.options[key] = _obj[key];
		},
		initialize: function(){
			var _this = this;
			var _hold = _this._hold;
            var _marginLeft = 0;
			var _speed = _this.options.duration;
			var _timer = _this.options.autoRotation;
			var _el = _hold.find(_this.options.listOfSlides);
			if (_this.options.effect) var _list = _el;
			else var _list = _el.parent();
			var _switcher = _hold.find(_this.options.switcher);
			var _next = _hold.find(_this.options.nextBtn);
			var _prev = _hold.find(_this.options.prevBtn);
			var _w = _el.outerWidth(true);
			var _h = _el.outerHeight(true);
			if (_this.options.switcher) var _active = _switcher.index(_switcher.filter('.active:eq(0)'));
			else var _active = _el.index(_el.filter('.active:eq(0)'));
			if (_active < 0) _active = 0;
			var _last = _active;
            var _scroll_available = true;
			
			// Installation directions
			if (!_this.options.direction) {
				var _wrapHolderW = 0;
                var _total_w = _list.parent().width();
                for (var _cur_w = 0; _cur_w <= _total_w && _wrapHolderW < _el.length; ++_wrapHolderW) {
                    _cur_w += $(_el[_wrapHolderW]).outerWidth(true);
                    if (_wrapHolderW < _active)
                        _marginLeft = -_cur_w;
                }
                if (_total_w < _cur_w) {
                    for (var i = _wrapHolderW; i < _el.length; ++i) {
                        _cur_w += $(_el[i]).outerWidth(true);
                        if (i < _active)
                            _marginLeft = -_cur_w;
                    }
                    var _lastMarginLeft = -_cur_w;
                    for (var i = 0; i < _wrapHolderW; ++i)
                        _list.append($(_el[i]).clone());
                }
                else
                    _scroll_available = false;
			}
			else{
				var _wrapHolderW = Math.ceil(_list.parent().height()/_h);
				if (((_wrapHolderW-1)*_h + _h/2) > _list.parent().height()) _wrapHolderW--;
			}
			var _count = _el.index(_el.filter(':last')) + _wrapHolderW - 1;

			// Setting "fade" or "slide" effect
			if (!_this.options.effect) var rew = _count - _wrapHolderW + 1;
			else var rew = _count;
			if (!_this.options.effect) {
				if (!_this.options.direction) _list.css({marginLeft: -(_w * _active)})
				else _list.css({marginTop: -(_h * _active)})
			}
			else {
				_list.css({
					opacity: 0
				}).removeClass('active').eq(_active).addClass('active').css({
					opacity: 1
				}).css('opacity', 'auto');
				_switcher.removeClass('active').eq(_active).addClass('active');
			}
			
			// Disable or enable buttons "prev next"
			if (_this.options.disableBtn) {
				if (_count < _wrapHolderW) _next.addClass(_this.options.disableBtn);
				_prev.addClass(_this.options.disableBtn);
			}

			// Function to "fade"
			function fadeElement(){
				if ($.browser.msie && _this.options.IE){
					_list.eq(_last).css({opacity:0});
					_list.removeClass('active').eq(_active).addClass('active').css({opacity:'auto'});
				}
				else{
					_list.eq(_last).animate({opacity:0}, {queue:false, duration: _speed});
					_list.removeClass('active').eq(_active).addClass('active').animate({
						opacity:1
					}, {queue:false, duration: _speed, complete: function(){
						$(this).css('opacity','auto');
					}});
				}
				if (_this.options.switcher) _switcher.removeClass('active').eq(_active).addClass('active');
				_last = _active;
			}
			
			// Function for "slide"
			function scrollEl(_active, _scroll_next){
				if (!_this.options.direction) {
                    _list.stop(true);
                    if (_active == 1 && _scroll_next) {
                        _marginLeft = 0;
                        _list.css({marginLeft: _marginLeft});
                    } else if (_active == rew && !_scroll_next) {
                        _marginLeft = _lastMarginLeft;;
                        _list.css({marginLeft: _marginLeft});
                    }
                    var el_width = $(_el[(_active - 1 + rew) % rew]).outerWidth(true);
                    if (_scroll_next)
                        _marginLeft -= el_width;
                    else
                        _marginLeft += el_width;
                    _list.animate({marginLeft: _marginLeft}, _speed);
                }
				else _list.animate({marginTop: -(_h * _active)}, _speed)
				if (_this.options.switcher) _switcher.removeClass('active').eq(_active).addClass('active');
			}
			function toPrepare(){
                if (!_scroll_available) return;
				if ((_active == rew) && _this.options.circle) _active = -_this.options.slideElement;
				for (var i = 0; i < _this.options.slideElement; i++){
					_active++;
					if (_active > rew) {
						_active--;
						if (_this.options.disableBtn &&(_count > _wrapHolderW)) _next.addClass(_this.options.disableBtn);
					}
				};
				if (_active == rew) if (_this.options.disableBtn &&(_count > _wrapHolderW)) _next.addClass(_this.options.disableBtn);
				if (!_this.options.effect) scrollEl(_active, true);
				else fadeElement(_active, true);
			}
			_this._hold.bind('runTimer', function(){
				_this._t = setInterval(function(){
					toPrepare();
				}, _this._timer);
			});
			_next.click(function(){
				if(_this._t) clearTimeout(_this._t);
				if (_this.options.disableBtn &&(_count > _wrapHolderW)) _prev.removeClass(_this.options.disableBtn);
				toPrepare();
				if (_this._timer) _this._hold.trigger('runTimer');
				return false;
			});
			_prev.click(function(){
				if(_this._t) clearTimeout(_this._t);
				if (_this.options.disableBtn &&(_count > _wrapHolderW)) _next.removeClass(_this.options.disableBtn);
				if ((_active == 0) && _this.options.circle) _active = rew + _this.options.slideElement;
				for (var i = 0; i < _this.options.slideElement; i++){
					_active--;
					if (_active < 0) {
						_active++;
						if (_this.options.disableBtn &&(_count > _wrapHolderW)) _prev.addClass(_this.options.disableBtn);
					}
				};
				if (_active == 0) if (_this.options.disableBtn &&(_count > _wrapHolderW)) _prev.addClass(_this.options.disableBtn);
				if (!_this.options.effect) scrollEl(_active, false);
				else fadeElement(_active, false);
				if (_this._timer) _this._hold.trigger('runTimer');
				return false;
			});
			if (_this.options.switcher) _switcher.click(function(){
				_active = _switcher.index($(this));
				if(_this._t) clearTimeout(_this._t);
				if (!_this.options.effect) scrollEl(_active, true);
				else fadeElement(_active, true);
				if (_this._timer) _this._hold.trigger('runTimer');
				return false;
			});
			if (_this._timer) _this._hold.trigger('runTimer');
            _this._hold.mouseover(function() {
                _this.stop();
            });
            _this._hold.mouseout(function() {
                _this.play();
            });
		},
		stop: function(){
			var _this = this;
			if (_this._t) clearTimeout(_this._t);
		},
		play: function(){
			var _this = this;
			if (_this._t) clearTimeout(_this._t);
			if (_this._timer) _this._hold.trigger('runTimer');
		}
	}
}(jQuery));

$(window).load(function(){
	$('.carusel').gallery({
		autoRotation: 5000,
		listOfSlides: 'ul.carusel-content>li'
	});
});