/*
* jQuery pager plugin
* Version 1.0 (12/22/2008)
* @requires jQuery v1.2.6 or later
*
* Example at: http://jonpauldavies.github.com/JQuery/Pager/PagerDemo.html
*
* Copyright (c) 2008-2009 Jon Paul Davies
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
* 
* Read the related blog post and contact the author at http://www.j-dee.com/2008/12/22/jquery-pager-plugin/
*
* This version is far from perfect and doesn't manage it's own state, therefore contributions are more than welcome!
*
* Usage: .pager({ pagenumber: 1, pagecount: 15, buttonClickCallback: PagerClickTest });
*
* Where pagenumber is the visible page number
*       pagecount is the total number of pages to display
*       buttonClickCallback is the method to fire when a pager button is clicked.
*
* buttonClickCallback signiture is PagerClickTest = function(pageclickednumber) 
* Where pageclickednumber is the number of the page clicked in the control.
*
* The included Pager.CSS file is a dependancy but can obviously tweaked to your wishes
* Tested in IE6 IE7 Firefox & Safari. Any browser strangeness, please report.

/*****************************************************************
** File:  ILNY.pager.js  
** Name: ILNY Listing Results Pagination
** Desc:
** Auth:  Ahsan Khurshid
** Date:  October 22, 2009
**************************
** Change History
**************************
** Ver   Date        Author				Description 
** ---   ----------   -------			------------------------------------
** 1.0   12/22/2008   Jon Paul Davies   Initial Version
** 1.1   10/22/2009   AK				Modified for ILNY Listing
** 1.2   10/28/2009   KC/RH             Added support for parent div
** 1.2   11/03/2009   KC                Added additional data Get functions
****************************************************************************/
 
(function($) {

    $.fn.pager = function(options) {
        //alert(options.recordsPerPage);
        var opts = $.extend({}, $.fn.pager.defaults, options);

        return this.each(function() {

            opts.parentPagerDiv = $(this).parents('.paginationWrapDiv').attr('id');

            // empty out the destination element and then render out the pager with the supplied options
            $(this).empty().append(renderpager(opts.parentPagerDiv, parseInt(options.pagenumber, 10), parseInt(options.pagecount, 10), options.buttonClickCallback, options.targetURL, parseInt(options.recordsPerPage, 10)));

            // specify page-number li hover activity
            $('.page-number').hover(
				function() {
				    $(this).css("backgroundColor", "#fad23d");
				    $(".pgCurrent").css("backgroundColor", "#62635d");
				    $(".pgCurrent").css("color", "#ffffff");

				},
				function() {
				    $(this).css("backgroundColor", "transparent");
				    $(".pgCurrent").css("backgroundColor", "#62635d");
				    $(".pgCurrent").css("color", "#ffffff");
				}
			 );

            // specify correct cursor activity
            $('.pages li').mouseover(function() { document.body.style.cursor = "pointer"; }).mouseout(function() { document.body.style.cursor = "auto"; });
        });
    };

    // render and return the pager with the supplied options
    function renderpager(parentPagerDiv, pagenumber, pagecount, buttonClickCallback, targetURL, recordsPerPage) {

        var lastrec = pagenumber * recordsPerPage;
        var firstrec = lastrec - recordsPerPage + 1;
        var totalRecords = GetPagerTotalPageCount(parentPagerDiv);
        if (totalRecords == 0) {
            firstrec = 0;
            lastrec = 0;
            $('.paginationText', '#' + parentPagerDiv).html("");
        }
        else {

            if (lastrec > parseInt(totalRecords, 10)) lastrec = totalRecords;
            $('.paginationText', '#' + parentPagerDiv).html('<div style="float:left">' + firstrec + '-' + lastrec + ' of ' + totalRecords + '</div>');
        }

        // setup $pager to hold render
        var $pager = $('<ul class="pages"></ul>');

        // add in the previous and next buttons
        $pager.append(renderButton('first', pagenumber, pagecount, buttonClickCallback, parentPagerDiv)).append(renderButton('prev', pagenumber, pagecount, buttonClickCallback, parentPagerDiv));

        // pager currently only handles 10 viewable pages ( could be easily parameterized, maybe in next version ) so handle edge cases
        //        var startPoint = 1;
        //        var endPoint = recordsPerPage;
        //        var changeable = (Math.round(recordsPerPage / 2) - 1);

        //        if (pagenumber > changeable) {
        //            startPoint = pagenumber - changeable;
        //            endPoint = pagenumber + changeable + 1;
        //        }

        //        if (endPoint > pagecount) {
        //            startPoint = pagecount - recordsPerPage + 1;
        //            endPoint = pagecount;
        //        }

        //        if (startPoint < 1) {
        //            startPoint = 1;
        //        }

        var pivot = 2;
        var startPoint = pagenumber - pivot;
        var endPoint = pagenumber + pivot;
        if (startPoint < 1) {
            startPoint = 1;
            endPoint = startPoint + (2 * pivot);
        }
        if (endPoint > pagecount) {
            endPoint = pagecount;
            startPoint = endPoint - (2 * pivot);
            if (startPoint < 1) startPoint = 1;
        }

        // loop thru visible pages and render buttons
        for (var page = startPoint; page <= endPoint; page++) {

            var currentButton = $('<li class="page-number">' + (page) + '</li>');

            page == pagenumber ? currentButton.addClass('pgCurrent') : currentButton.click(function() { buttonClickCallback(this.firstChild.data, parentPagerDiv); });
            currentButton.appendTo($pager);
        }

        // render in the next and last buttons before returning the whole rendered control back.
        $pager.append(renderButton('next', pagenumber, pagecount, buttonClickCallback, parentPagerDiv)).append(renderButton('last', pagenumber, pagecount, buttonClickCallback, parentPagerDiv));

        return $pager;
    }

    // renders and returns a 'specialized' button, ie 'next', 'previous' etc. rather than a page number button
    function renderButton(buttonLabel, pagenumber, pagecount, buttonClickCallback, parentPagerDiv) {

        var $Button = $('<li class="pgNext"><span class="hidden">' + buttonLabel + '</span></li>');

        var destPage = 1;

        // work out destination page for required button type
        switch (buttonLabel) {
            case "first":
                destPage = 1;
                $Button.addClass('pgFirst');
                break;
            case "prev":
                destPage = pagenumber - 1;
                $Button.addClass('pgPrev');
                break;
            case "next":
                destPage = pagenumber + 1;
                break;
            case "last":
                destPage = pagecount;
                $Button.addClass('pgLast');
                break;
        }

        if (buttonLabel == "first" || buttonLabel == "prev") {
            pagenumber <= 1 ? $Button.addClass('pgEmpty') : $Button.click(function() { buttonClickCallback(destPage, parentPagerDiv); });
        }
        else {
            pagenumber >= pagecount ? $Button.addClass('pgEmpty') : $Button.click(function() { buttonClickCallback(destPage, parentPagerDiv); });
        }

        return $Button;
    }

    // pager defaults. hardly worth bothering with in this case but used as placeholder for expansion in the next version
    $.fn.pager.defaults = {
        pagenumber: 1,
        pagecount: 1
    };

    //    this.getPagerStateValue(function() {

    //        var pagerWrapperDivId = $(this).parents('.paginationWrapDiv').attr('id');
    //        var pageStateValue = $('#' + pagerWrapperDivId + ' .pageStateValue').val();
    //        return pageStateValue;
    //    })

})(jQuery);


function GetPagerTotalPageCount(pagerWrapperDivId) {

    var totalResultCount = $('#' + pagerWrapperDivId + ' .pageTotalRecords').val();
    if (totalResultCount == null)
        return 0;
    else
        return totalResultCount
}

function SetPageTotalPageCount(pagerId, totalCount) {

    $('#' + pagerId + ' .pageTotalRecords').val(totalCount);
}