/*
jQuery Version:				jQuery 1.3.2
Plugin Name:				ClickScroller V 1.0
Plugin by: 					Jeff Waterfall: http://www.threeformed.com
License:					ClickScroller is licensed under a Creative Commons Attribution 3.0 Unported License
Read more about this license at --> http://creativecommons.org/licenses/by/3.0/			

UPDATED
*/
(function ($) {
    $.fn.clickScroll = function (options) {

        // setup default settings
        var defaults = {
            speed: 200,
            easing: 'linear',
            lessBtn: '#clickscroll-less',
            moreBtn: '#clickscroll-more',
            btnFadeSpeed: 100,
            autoHideNav: true,
            horizontal: false
        },
    	settings = $.extend({}, defaults, options);

        return this.each(function () {
            var obj = $(this);
            // Variables
            var frameHeight = obj.innerHeight();
            var listHeight = obj.children('ul').innerHeight();
            var itemCount = obj.children('ul').children('li').size();
            var itemHeight = listHeight / itemCount;
            var steps = frameHeight / itemHeight;
            var margin = 23;
            if (settings.horizontal) { // Get the width and apply it
                var listWidth = 0;
                obj.children('ul').children('li').each(function (i) {
                    listWidth += $(this).outerWidth(true);
                });
                obj.children('ul').width(listWidth);
                steps = Math.ceil(listWidth / (obj.outerWidth(true) + margin));
            }
            var groupHeight = Math.ceil(listHeight / steps);
            var groupWidth = Math.ceil(listWidth / steps);
            groupWidth = obj.outerWidth(true) + margin;
            var step = 0;
            var targ = 0;

            if (settings.autoHideNav) {
                $(settings.lessBtn).hide(); // Hides scroll up/left button
            }
            if (listHeight > frameHeight) {
                obj.show();
            } else {

            }
            if (settings.autoHideNav && step >= (steps - 1)) {
                $(settings.moreBtn).hide();
            }
            $(settings.moreBtn + ',' + settings.lessBtn).click(function () {
                return false; // prevents from page jump (event when buttons are disabled)							   
            });
            var scrollMore = function () {
                step++;
                if (settings.horizontal) {
                    targ -= groupWidth;
                    obj.children('ul').stop(true).animate({ 'left': targ }, settings.speed, settings.easing);
                } else {
                    targ -= groupHeight;
                    obj.children('ul').stop(true).animate({ 'top': targ }, settings.speed, settings.easing);
                }

                if (step >= Math.floor(steps) - 1) {
                    if (settings.autoHideNav) {
                        $(this).fadeOut(settings.btnFadeSpeed);
                        $(settings.lessBtn).fadeIn(settings.btnFadeSpeed);
                    }
                    //$(this).unbind('click', scrollMore);
                    //$(settings.lessBtn).bind('click', scrollLess);
                } else {
                    if (settings.autoHideNav) {
                        $(settings.lessBtn).fadeIn(settings.btnFadeSpeed);
                    }
                    //$(this).bind('click', scrollMore);
                    //$(settings.lessBtn).bind('click', scrollLess);
                }
                return false;
            }


            $(settings.moreBtn).bind('click', scrollMore);

            var scrollLess = function () {
                step--;
                if (settings.horizontal) {
                    targ += groupWidth;
                    obj.children('ul').stop(true).animate({ 'left': targ }, settings.speed, settings.easing);
                } else {
                    targ += groupHeight;
                    obj.children('ul').stop(true).animate({ 'top': targ }, settings.speed, settings.easing);
                }

                if (step == 0) {
                    if (settings.autoHideNav) {
                        $(this).fadeOut(settings.btnFadeSpeed);
                        $(settings.moreBtn).fadeIn(settings.btnFadeSpeed);
                    }
                    //$(this).unbind('click', scrollLess);
                    //$(settings.moreBtn).bind('click', scrollMore);
                } else {
                    if (settings.autoHideNav) {
                        $(settings.moreBtn).fadeIn(settings.btnFadeSpeed);
                    }
                    //$(this).bind('click', scrollLess);
                    //$(settings.moreBtn).bind('click', scrollMore);
                }
                return false;
            }

            $(settings.lessBtn).bind('click', scrollLess);
        }); // END: return this

        // returns the jQuery object to allow for chainability.  
        return this;
    };
})(jQuery);