(function ($) {
    $.fn.nicoslider = function (options) {
        var defaults = {
            start: 0,
            color: '#F6F2F1',
            sliderHeight: false
        };

        var opts = $.extend({}, $.fn.nicoslider.defaults, defaults, options);

        return this.each(function () {
            new nicoslide(this, opts);
        });
    };


    var nicoslide = function (slider, o) {
        var $slider = $(slider);

        $sliderWidth = $slider.parent().innerWidth();

        $sliderCss = {
            'width': $sliderWidth,
            'background-color': o.color
        };

        $slider.css($sliderCss);

        var ul = $slider.find("ul");
        var ulWidth = 0;
        var liHeight = 0;

        $slider.find("li").each(function () {
            ulWidth += $(this).width() + 5;
            ulWidth += parseInt($(this).css("padding-left"));
            ulWidth += parseInt($(this).css("padding-right"));
            ulWidth += parseInt($(this).css("margin-left"));
            ulWidth += parseInt($(this).css("margin-right"));
            liHeight = Math.max(liHeight, $(this).outerHeight());
        });
        //5 % of slider width
        $scrollWidth = Math.round(parseInt($sliderWidth) * parseFloat("0.05"));
        //min 30 px;
        if ($scrollWidth < 30) {
            $scrollWidth = 30;
        }

        var $wrapperWidth = Math.round(parseInt($sliderWidth) - ( 2 * $scrollWidth ));

        if (ulWidth > $wrapperWidth) {
            ul.wrapAll("<div class='wrapper'></div>");
            $wrapper = $slider.find(".wrapper");
            $ulHeight = ul.height();
            $wrapper.width($wrapperWidth);
            $wrapper.height($ulHeight);

            $wrapperCss = {
                'overflow': 'hidden',
                'float': 'left',
                'position': 'relative'
            };

            $wrapper.css($wrapperCss);
            ul.css('position', 'absolute');
            ul.width(ulWidth);
            $slider.prepend("<div class='scrollleft'></div>");
            $slider.append("<div class='scrollright'></div>");

            var rightScroll = $slider.find(".scrollright");
            var leftScroll = $slider.find(".scrollleft");

            rightScroll.append("<div class='rb'>&gt;</div>");
            leftScroll.append("<div class='lb'>&lt;</div>");

            $("div.rb").css('float', 'right');

            rightCss = {
                'width': $scrollWidth - ($wrapper.outerWidth(true) - $wrapper.innerWidth()),
                'height': liHeight + 5,
                'float': 'right',
                'background-color': o.color,
                'cursor': 'pointer',
                ' user-select': 'none'
            };

            leftCss = {
                'width': $scrollWidth - ($wrapper.outerWidth(true) - $wrapper.innerWidth()),
                'height': liHeight + 5,
                'float': 'left',
                'background-color': o.color,
                'cursor': 'pointer',
                ' user-select': 'none'
            };

            leftScroll.css(leftCss);
            rightScroll.css(rightCss);

            var rightScrollWidth = rightScroll.width();
            var leftScrollWidth = leftScroll.width();
            var scrollXpos = 0;
            var scrollStepSpeed = 40;
            var speed = 8;
            var shift = o.start;


            //scroll a droite
            rightScroll.bind("click", function (e) {
                var x = e.pageX - ($(this).offset().left);
                scrollXpos = Math.round((x / rightScrollWidth) * scrollStepSpeed);
                shift += (scrollXpos * speed);

                if (shift > (ulWidth - $wrapperWidth) + 50) {
                    shift = (ulWidth - $wrapperWidth) + 50;
                }
                ul.animate({
                    left: -shift
                }, 1);
            });

            //scroll a gauche
            leftScroll.bind("click", function (e) {
                var x = $(this).innerWidth() - (e.pageX - $(this).offset().left);

                scrollXpos = Math.round((x / leftScrollWidth) * scrollStepSpeed);
                shift -= (scrollXpos * speed);

                if (shift < 0) {
                    shift = 0;
                }

                ul.animate({
                    left: -shift
                }, 1);

            });
        }
    };
})(jQuery);