(function($) {

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

        return this.each(function() {
            $(this).empty().append(renderpager(parseInt(options.pagenumber), parseInt(options.pagecount), options.buttonClickCallback));
            $('.pages li').mouseover(function() { document.body.style.cursor = "pointer"; }).mouseout(function() { document.body.style.cursor = "auto"; });
        });
    };


    function renderpager(pagenumber, pagecount, buttonClickCallback) {


        var $pager = $('<ul class="pages"></ul>');

    
        var startPoint = 1;
        var endPoint = 7;

		if(pagecount<=7){
			startPoint=1;
			endPoint=pagecount;
		}
		if(pagecount>=7){
		 if (pagenumber > 3 ) {
            startPoint = pagenumber - 3;
            endPoint = pagenumber + 3;
        }

        if (endPoint > pagecount) {
				startPoint = pagecount - 6;
				endPoint = pagecount;			
        }
		if(pagenumber>pagecount-5){
			startPoint=pagecount-8;
			endPoint=pagecount-2;
		}
  
		}
		if (startPoint < 1) {
            startPoint = 1;
        }
       
		

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

			var currentButton = $('<li class="papernormellink">' + (page) + '</li>');
			page == pagenumber ? currentButton.addClass('paperactlink') : currentButton.click(function() { buttonClickCallback(this.firstChild.data); });
			currentButton.appendTo($pager);

		}
      
	
		if(pagenumber<pagecount-5){
			$pager.append('<li >...</li>');
		}
	if(pagecount>=7){
		var lastStartPage=pagecount-1;
			var lastEndPage=pagecount;
			for (var page = lastStartPage; page <= lastEndPage; page++) {

            var currentButton = $('<li class="papernormellink">' + (page) + '</li>');
            page == pagenumber ? currentButton.addClass('paperactlink') : currentButton.click(function() { buttonClickCallback(this.firstChild.data); });
            currentButton.appendTo($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));

        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">' + buttonLabel + '</li>');

        var destPage = 1;

        // work out destination page for required button type
        switch (buttonLabel) {
            case "first":
                destPage = 1;
                break;
            case "prev":
                destPage = pagenumber - 1;
                break;
            case "next":
                destPage = pagenumber + 1;
                break;
            case "last":
                destPage = pagecount;
                break;
        }

        // disable and 'grey' out buttons if not needed.
      /*  if (buttonLabel == "first" || buttonLabel == "prev") {
            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);