/* 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: 1.1 (May 22, 2008)
 * Requires: jQuery 1.2+
 */

//modified by LandRover 30th May 08

(function($) {
	$.fn.jFlow = function(options) {
    var opts = $.extend({self: this}, $.fn.jFlow.defaults, options);
	//alert(opts);
    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 = $(this).find(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)")) {
                $(opts.self).find(jFC).removeClass(jSel);
                $(this).addClass(jSel);
                var dur = Math.abs(cur-i);
                slide(dur,i);
                cur = i;
                if ($.isFunction(opts.onChange)) { opts.onChange(cur); }
            }
        });
    }); 

    $(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
    $(this).find(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();                         
    });

    $(this).find(opts.prev).click(function(){
        dotimer();
        doprev();
        if ($.isFunction(opts.onChange)) { opts.onChange(cur); }
        return false;
    });

    $(this).find(opts.next).click(function(){
        dotimer();
        donext();
        if ($.isFunction(opts.onChange)) { opts.onChange(cur); }
        return false;
    });

    var doprev = function (x){
        if ($(opts.slides).is(":not(:animated)")) {
            var dur = 1;
            if (cur > 0)
                cur--;
            else {
                cur = maxi -1;
                dur = cur;
            }
            $(opts.self).find(jFC).removeClass(jSel);
            slide(dur,cur);
            $(opts.self).find(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;
            }
            $(opts.self).find(jFC).removeClass(jSel);
            //$(jFS).fadeOut("fast");
            slide(dur, cur);
            //$(jFS).fadeIn("fast");
            $(opts.self).find(jFC).eq(cur).addClass(jSel);
        }
    };

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

            timer = setInterval(function() {
                    $(opts.self).find(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: true,
    easing: 'swing',
    duration: 400,
    width: '100%',
    prev:       '.jFlowPrev',
    next:       '.jFlowNext',
};
})(jQuery);