(function($) {
    $.fn.jFlow = function(options) {
        var opts = $.extend({}, $.fn.jFlow.defaults, options);
        var randNum = Math.floor(Math.random()*11);
        var jFC = opts.controller;
        var jFS =  opts.slideWrapper;
        var jSel = opts.selectedWrapper;
        var cur = 0;
        var timer;
        var maxi = $(jFC).length;
        var background_element; //izveido masku fade IE

        // sliding function
        var slide = function (dur, i) {
            if(!background_element){
                background_element = $(opts.slides).before("<div class='background-element'></div>");
            }
            $(opts.slides).children().css({
                overflow:"hidden"
            });
            $(opts.slides + " iframe").hide().addClass("temp_hide");
            //$(opts.slides).customFadeOut("slow");            
            $(".background-element").fadeTo("slow", 1, function(){
                $(opts.slides).animate({
                    marginLeft: "-" + (i * $(opts.slides).find(":first-child").width() + "px")
                },
                        opts.duration*(dur),
                        opts.easing,
                        function(){
                            $(opts.slides).children().css({
                                overflow:"hidden"
                            });
                            $(".temp_hide").show();
                        }
                        );
            });
            $(".background-element").fadeTo("slow", 0, function(){
              $(this).hide();
            });
            //$(opts.slides).customFadeIn("slow");
        }
        $(this).find(jFC).each(function(i){
            $(this).click(function(){
                dotimer();
                if ($(opts.slides).is(":not(:animated)")) {
                    $(jFC).removeClass(jSel);
                    $(this).addClass(jSel);
                    var dur = Math.abs(cur-i);
                    slide(dur,i);
                    cur = i;
                }
            });
        });
        $(opts.slides).before('<div id="'+jFS.substring(1, jFS.length)+'"></div>').appendTo(jFS);
        $(opts.slides).find("div").each(function(){
            $(this).before('<div class="jFlowSlideContainer"></div>').appendTo($(this).prev());
        });

        //initialize the controller
        $(jFC).eq(cur).addClass(jSel);
        var resize = function (x){
            $(jFS).css({
                position:"relative",
                width: opts.width,
                height: opts.height,
                overflow: "hidden"
            });

            //opts.slides or #mySlides container
            $(opts.slides).css({
                position:"relative",
                width: $(jFS).width()*$(jFC).length+"px",
                height: $(jFS).height()+"px",
                overflow: "hidden"
            });

            // jFlowSlideContainer
            $(opts.slides).children().css({
                position:"relative",
                width: $(jFS).width()+"px",
                height: $(jFS).height()+"px",
                "float":"left",
                overflow:"hidden"
            });

            $(opts.slides).css({
                marginLeft: "-" + (cur * $(opts.slides).find(":eq(0)").width() + "px")
            });
        }

        // sets initial size
        resize();

        // resets size
        $(window).resize(function(){
            resize();
        });

        $(opts.prev).click(function(){
            dotimer();
            doprev();
        });

        $(opts.next).click(function(){
            dotimer();
            donext();
        });

        var doprev = function (x){
            if ($(opts.slides).is(":not(:animated)")) {
                var dur = 1;
                if (cur > 0)
                    cur--;
                else {
                    cur = maxi -1;
                    dur = cur;
                }

                $(jFC).removeClass(jSel);
                slide(dur,cur);
                $(jFC).eq(cur).addClass(jSel);
            }
        }

        var donext = function (x){
            if ($(opts.slides).is(":not(:animated)")) {
                var dur = 1;
                if (cur < maxi - 1)
                    cur++;
                else {
                    cur = 0;
                    dur = maxi -1;
                }
                $(jFC).removeClass(jSel);

                //$(jFS).fadeOut("fast");
                slide(dur, cur);

                //$(jFS).fadeIn("fast");
                $(jFC).eq(cur).addClass(jSel);
            }
        }



        var dotimer = function (x){
            if((opts.auto) == true) {
                if(timer != null)
                    clearInterval(timer);

                timer = setInterval(function() {
                    $(opts.next).click();
                }, 5000);
            }
        }


        //Pause/Resume function fires at hover
        dotimer();
        $(opts.slides).hover(
                function() {
                    clearInterval(timer);
                },
                function() {
                    dotimer();
                }
                );
    };

    $.fn.jFlow.defaults = {
        controller: ".jFlowControl", // must be class, use . sign
        slideWrapper : "#jFlowSlide", // must be id, use # sign
        selectedWrapper: "jFlowSelected",  // just pure text, no sign
        auto: true,
        easing: "swing",
        duration: 0,
        width: "100%",
        prev: ".jFlowPrev", // must be class, use . sign
        next: ".jFlowNext" // must be class, use . sign
    };

})(jQuery);