/*
* jQuery pager plugin
* Version 1.0 (12/22/2008)
* @requires jQuery v1.2.6 or later
* Moded by S.F. for Scam.fr
*
*
*/
(function($) {

    $.fn.pager = function(options) {

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

        return this.each(function() {

        // empty out the destination element and then render out the pager with the supplied options
            $(this).empty().append(renderpager(parseInt(options.pagenumber), parseInt(options.pagecount), options.buttonClickCallback));
            
            // specify correct cursor activity
            // $('.pagination li a').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(pagenumber, pagecount, buttonClickCallback) {

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

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

        // pager currently only handles 10 viewable pages ( could be easily parameterized, maybe in next version ) so handle edge cases
        var startPoint = 1;
        var endPoint = 9;

        if (pagenumber > 4) {
            startPoint = pagenumber - 4;
            endPoint = pagenumber + 4;
        }

        if (endPoint > pagecount) {
            startPoint = pagecount - 8;
            endPoint = pagecount;
        }

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

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

            var currentButton = $('<li class="page-number"><a href="#top">' + (page) + '</a></li>');
		 page == pagenumber ? currentButton.addClass('active') : currentButton.click(function() { buttonClickCallback(jQuery(this).children('a').html());});
            currentButton.appendTo($pager);
        }

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

        return $pager;
    }

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

        var $Button = $('<li class="pgNext"><a href="#top">' + buttonLabel + '</a></li>');

        var destPage = 1;

        // work out destination page for required button type
        switch (buttonLabel) {
            case "first":
                destPage = 1;
                break;
            case "<<":
                destPage = pagenumber - 1;
				$Button = $('<li class="previous"><a href="#top">' + buttonLabel + '</a></li>');
                break;
            case ">>":
                destPage = pagenumber + 1;
				$Button = $('<li class="next"><a href="#top">' + buttonLabel + '</a></li>');
                break;
            case "last":
                destPage = pagecount;
                break;
        }

        // disable and 'grey' out buttons if not needed.
        if (buttonLabel == "first" || buttonLabel == "<<") {
            pagenumber <= 1 ? $Button.addClass('pgEmpty') : $Button.click(function() { buttonClickCallback(destPage); });
        }
        else {
            pagenumber >= pagecount ? $Button.addClass('pgEmpty') : $Button.click(function() { buttonClickCallback(destPage); });
        }

        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
    };

})(jQuery);