(function ($) {
    var scrollWidthHeight = $.getScrollBarWidthHeight();
    var settings = {
        mode: 'calendar',                   // available modes: team, view, calendar
        headerWidth: 70,
        tableHeightMin: 450,
        noVScroll: true,                    // use main page scroll, show all calendar
        resizeTimeout: 15,
        scrollWidth: scrollWidthHeight[0],
        scrollHeight: scrollWidthHeight[1],
        browserNonIE: ["ie", "ie1"].indexOf(checkBrowser()) < 0, //IE places scrollbars above the content and does not need additional space for scrollbar
    };

    var registerWatchers = function ($container) {
        var data = {
            $parent: $container.parent(),
            $container: $container,
            $firstCellContainer: $container.find("div.ac-left-col"),
            $resizableTable: $container.find("table.main-table"),
            $heightContainer: $container.find("div.height-container"),
            $widthContainer: $container.find("div.width-container")
        };
        //console.log("register resize watchers");
        setupResizeEvent($container, data);
        setupResizeEvent($container.find('.watch-resizing'), data);
        $container.find('.watch-scroll').on('scroll', data, scrollHandler);
    };
    var setupResizeEvent = function (obj, data) {
        $(obj).off('resize.ac-grid').on('resize.ac-grid', function () {
            if (settings.resizeTimeout > 0) {
                if ($(obj).data('resize.ac-grid.timeout')) {
                    clearTimeout($(obj).data('resize.ac-grid.timeout'));
                }
                $(obj).data('resize.ac-grid.timeout', setTimeout(resizeHandler, settings.resizeTimeout, obj, data));
            }
            else
                resizeHandler(obj, data);
        });
    };
    var resizeHandler = function (obj, data) {
        var startDate = new Date().getTime();
        var width = data.$resizableTable.width(),
            height = data.$resizableTable.height(),
            heightContainerHeight = data.$heightContainer.height();
        var newwidth = width;
        //console.log('resizing started: ' + startDate + ' ms. Width=' + width + ', Height=' + height + ', heightContainerHeight=' + heightContainerHeight);
        if (settings.noVScroll) {
            heightContainerHeight = height;
            data.$heightContainer.css("overflow-y", "hidden");
            //data.$heightContainer.height(heightContainerHeight);
        } else if ((heightContainerHeight <= settings.tableHeightMin && height > 0))
        {
            heightContainerHeight = height + settings.scrollHeight;
            //data.$heightContainer.height(heightContainerHeight);
        }
        //resize container width
        var vertScrollShown = height > heightContainerHeight;
        var visibleCellCount = data.$resizableTable.attr('data-visible-cells');
       
        if (settings.mode === 'calendar') {
            newwidth = Math.min((settings.headerWidth * visibleCellCount) + (settings.browserNonIE && vertScrollShown ? settings.scrollWidth : 0) + 1,
                data.$parent.outerWidth() - data.$firstCellContainer.width() - 1)
            
             //data.$widthContainer.width(newwidth);
        } else {
            newwidth = Math.min(settings.headerWidth * visibleCellCount + (settings.browserNonIE && vertScrollShown ? settings.scrollWidth : 0),
                data.$parent.outerWidth() - data.$firstCellContainer.width() - 1);
        }
        //resize container height again when horizont scroll bar appears
        if (settings.noVScroll && settings.browserNonIE) {
            var heightContainerWidth = data.$heightContainer.width();
            var horizontScrollShown = width > heightContainerWidth;
            if (horizontScrollShown) {
                heightContainerHeight += settings.scrollHeight + 1;
                //data.$heightContainer.height(heightContainerHeight + 1); // +1 just for better look and feel to have a gap between scroll and content
            }
        }

        data.$heightContainer.height(heightContainerHeight );
        data.$widthContainer.width(newwidth);
        var endDate = new Date().getTime();
        //console.log('resizing: ' + (endDate - startDate) + ' ms');
    };
    var scrollHandler = function (event) {
        var leftPosition = (-event.target.scrollLeft + 'px');
        var topPosition = (-event.target.scrollTop + 'px');

        event.data.$container.find('.horizontal-scroll-target').css('left', leftPosition);
        event.data.$container.find('.vertical-scroll-target').css('margin-top', topPosition);
    };

    var methods = {
        init: function (options) {
            settings = $.extend(true, settings, options);
            this.each(function () {
                registerWatchers($(this));
            });
        },
    };

    $.fn.activityCalendarGrid = function (options) {
        if (typeof options === 'string' && typeof methods[options] === 'function') {
            return methods[options].apply(this, Array.prototype.slice.call(arguments, 1));
        } else if (typeof options === 'object' || !options) {
            return methods.init.apply(this, arguments);
        }
    };
}(jQuery));