/* Credits go to Boba from TutsValley in this article :
http://tutsvalley.com/tutorials/making-a-jquery-infinite-carousel-with-nice-features
*/

$(document).ready(function() {

        //options( 1 - ON , 0 - OFF)
        var auto_slide = 1;
        var hover_pause = 1;

        //speed of auto slide(
        var auto_slide_seconds = 100;
        /* IMPORTANT: i know the variable is called ...seconds but it's
        in milliseconds ( multiplied with 1000) '*/

        /*move the last list item before the first item. The purpose of this is
        if the user clicks to slide left he will be able to see the last item.*/
        //$('#carousel_ul li:last').after($('#carousel_ul li:first'));

        //check if auto sliding is enabled
        if(auto_slide == 1){
            /*set the interval (loop) to call function slide with option 'right'
            and set the interval time to the variable we declared previously */
            var timer = setInterval('slide("right")', auto_slide_seconds); 

            /*and change the value of our hidden field that hold info about
            the interval, setting it to the number of milliseconds we declared previously*/
            $('#hidden_auto_slide').val(auto_slide_seconds);
        }

        //check if hover pause is enabled
        if(hover_pause == 1){
            //when hovered over the list
            $('#carousel_ul').hover(function(){
                //stop the interval
                clearInterval(timer)
            },function(){
                //and when mouseout start it again
                timer = setInterval('slide("right")', auto_slide_seconds);
            });
        }

});

//FUNCTIONS BELLOW

//slide function
function slide(where){

            //get the item width
            var item_width = $('#carousel_ul li').outerWidth();

            /* using a if statement and the where variable check
            we will check where the user wants to slide (left or right)*/
            if(where == 'left'){
                //...calculating the new left indent of the unordered list (ul) for left sliding
                var left_indent = parseInt($('#carousel_ul').css('left')) + item_width;
            }else{
                //...calculating the new left indent of the unordered list (ul) for right sliding
                var left_indent = parseInt($('#carousel_ul').css('left')) - item_width;
            }

			//alert("left_indent : " + left_indent);
			
            //make the sliding effect using jQuery's animate function... '
            $('#carousel_ul:not(:animated)').animate({'left' : left_indent},5000,'linear',function(){    

                /* when the animation finishes use the if statement again, and make an ilussion
                of infinity by changing place of last or first item*/
                if(where == 'left'){
                    //...and if it slided to left we put the last item before the first item
                    $('#carousel_ul li:first').before($('#carousel_ul li:last'));
                }else{
                    //...and if it slided to right we put the first item after the last item
                    $('#carousel_ul li:last').after($('#carousel_ul li:first'));
                }

                //...and then just get back the default left indent
                $('#carousel_ul').css({'left' : '0px'});
            });
}