/* Copyright (c) 2008 Kean Loong Tan http://www.gimiti.com/kltan
 * Licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
 * jFlow
 * Version: 1.2 (July 7, 2008)
 * Requires: jQuery 1.2+
 */
 
(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;
        // sliding function
        var slide = function (dur, i) {
            $(opts.slides).children().css({
                overflow:"hidden"
            });
            $(opts.slides + " iframe").hide().addClass("temp_hide");
            $(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();
                }
            );
            
        }
        $(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();
                        }, 3000);
            }
        }
        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: false,
        easing: "swing",
        duration: 400,
        width: "100%",
        prev: ".jFlowPrev", // must be class, use . sign
        next: ".jFlowNext" // must be class, use . sign
    };
    
})(jQuery);