(function($) {
    $.fn.parallaxSlider = function(options) {
        var opts = $.extend({}, $.fn.parallaxSlider.defaults, options);
        return this.each(function() {
            var $pxs_container = $(this),
						o = $.meta ? $.extend({}, opts, $pxs_container.data()) : opts;

            //the main slider
            var $pxs_slider = $('.pxs_slider', $pxs_container),
            //the elements in the slider
						$elems = $pxs_slider.children(),
            //total number of elements
						total_elems = $elems.length,
            //the navigation buttons
						$pxs_next = $('.pxs_next', $pxs_container),
						$pxs_prev = $('.pxs_prev', $pxs_container),
            //the bg images
						$pxs_bg1 = $('.pxs_bg1', $pxs_container),
						$pxs_bg2 = $('.pxs_bg2', $pxs_container),
						$pxs_bg3 = $('.pxs_bg3', $pxs_container),
            //current image
						current = 0,
            //the thumbs container
						$pxs_thumbnails = $('.pxs_thumbnails', $pxs_container),
            //the thumbs
						$thumbs = $pxs_thumbnails.children(),
            //the interval for the autoplay mode
						slideshow,
            //the loading image
						$pxs_loading = $('.pxs_loading', $pxs_container),
						$pxs_slider_wrapper = $('.pxs_slider_wrapper', $pxs_container);

            //first preload all the images
            var loaded = 0, $images = $pxs_slider_wrapper.find('img');


            $pxs_loading.hide();
            $pxs_slider_wrapper.show();

            //one images width (assuming all images have the same sizes)
            var one_image_w = $pxs_slider.find('img:first').width();

            /*
            need to set width of the slider,
            of each one of its elements, and of the
            navigation buttons
            */
            setWidths($pxs_slider,
									    $elems,
									    total_elems,
									    $pxs_bg1,
									    $pxs_bg2,
									    $pxs_bg3,
									    one_image_w,
									    $pxs_next,
									    $pxs_prev);

            /*
            set the width of the thumbs
            and spread them evenly
            */
            $pxs_thumbnails.css({
                'width': one_image_w + 'px',
                'margin-left': -one_image_w / 2 + 'px'
            });
            var spaces = one_image_w / (total_elems + 1);
            $thumbs.each(function(i) {
                var $this = $(this);
                var left = spaces * (i + 1) - $this.width() / 2;
                $this.css('left', left + 'px');

                if (o.thumbRotation) {
                    var angle = Math.floor(Math.random() * 41) - 20;
                    $this.css({
                        '-moz-transform': 'rotate(' + angle + 'deg)',
                        '-webkit-transform': 'rotate(' + angle + 'deg)',
                        'transform': 'rotate(' + angle + 'deg)'
                    });
                }
                //hovering the thumbs animates them up and down
                $this.bind('mouseenter', function() {
                    $(this).stop().animate({ top: '-10px' }, 100);
                }).bind('mouseleave', function() {
                    $(this).stop().animate({ top: '0px' }, 100);
                });
            });

            //make the first thumb be selected
            highlight($thumbs.eq(0));

            //slide when clicking the navigation buttons
            $pxs_next.bind('click', function() {
                ++current;
                if (current >= total_elems)
                    if (o.circular)
                    current = 0;
                else {
                    --current;
                    return false;
                }
                highlight($thumbs.eq(current));
                slide(current,
										    $pxs_slider,
										    $pxs_bg3,
										    $pxs_bg2,
										    $pxs_bg1,
										    o.speed,
										    o.easing,
										    o.easingBg);
            });
            $pxs_prev.bind('click', function() {
                --current;
                if (current < 0)
                    if (o.circular)
                    current = total_elems - 1;
                else {
                    ++current;
                    return false;
                }
                highlight($thumbs.eq(current));
                slide(current,
										    $pxs_slider,
										    $pxs_bg3,
										    $pxs_bg2,
										    $pxs_bg1,
										    o.speed,
										    o.easing,
										    o.easingBg);
            });

            /*
            clicking a thumb will slide to the respective image
            */
            $thumbs.bind('click', function() {
                var $thumb = $(this);
                highlight($thumb);
                //if autoplay interrupt when user clicks
                if (o.auto)
                    clearInterval(slideshow);
                current = $thumb.index();
                slide(current,
										    $pxs_slider,
										    $pxs_bg3,
										    $pxs_bg2,
										    $pxs_bg1,
										    o.speed,
										    o.easing,
										    o.easingBg);
            });



            /*
            activate the autoplay mode if
            that option was specified
            */
            if (o.auto != 0) {
                o.circular = true;
                slideshow = setInterval(function() {
                    $pxs_next.trigger('click');
                }, o.auto);
            }

            /*
            when resizing the window,
            we need to recalculate the widths of the
            slider elements, based on the new windows width.
            we need to slide again to the current one,
            since the left of the slider is no longer correct
            */
            /*
            $(window).resize(function() {
            w_w = $(window).width();
            setWidths($pxs_slider, $elems, total_elems, $pxs_bg1, $pxs_bg2, $pxs_bg3, one_image_w, $pxs_next, $pxs_prev);
            slide(current,
            $pxs_slider,
            $pxs_bg3,
            $pxs_bg2,
            $pxs_bg1,
            1,
            o.easing,
            o.easingBg);
            });
            */



            /*

            $('#pxs_slider img').each(function(index) {
            // skip first image
            if (index != 0) {
            var img = $(this);
                    
            }
            });
            $images.each(function() {
            var $img = $(this);
            $('<img/>').load(function() {
            ++loaded;

                    if (loaded == total_elems * 2) {
            // ok now continue loading the images



                    }
            }).error(function() {
            alert('here')
            }).attr('src', $img.attr('src'));
            });
            */
            
        });

    };


    //the current windows width
    var w_w = $(window).width();
    w_w = 1024;
    var slide = function(current,
				$pxs_slider,
				$pxs_bg3,
				$pxs_bg2,
				$pxs_bg1,
				speed,
				easing,
				easingBg) {
        var slide_to = parseInt(-w_w * current);
        $pxs_slider.stop().animate({
            left: slide_to + 'px'
        }, speed, easing);
        $pxs_bg3.stop().animate({
            left: slide_to / 2 + 'px'
        }, speed, easingBg);
        $pxs_bg2.stop().animate({
            left: slide_to / 4 + 'px'
        }, speed, easingBg);
        $pxs_bg1.stop().animate({
            left: slide_to / 8 + 'px'
        }, speed, easingBg);
    }

    var highlight = function($elem) {
        $elem.siblings().removeClass('selected');
        $elem.addClass('selected');
    }

    var setWidths = function($pxs_slider,
				$elems,
				total_elems,
				$pxs_bg1,
				$pxs_bg2,
				$pxs_bg3,
				one_image_w,
				$pxs_next,
				$pxs_prev) {
        /*
        the width of the slider is the windows width
        times the total number of elements in the slider
        */
        var pxs_slider_w = w_w * total_elems;
        $pxs_slider.width(pxs_slider_w + 'px');
        //each element will have a width = windows width
        $elems.width(w_w + 'px');
        /*
        we also set the width of each bg image div.
        The value is the same calculated for the pxs_slider
        */
        //$pxs_bg1.width(pxs_slider_w + 'px');
        //$pxs_bg2.width(pxs_slider_w + 'px');
        //$pxs_bg3.width(pxs_slider_w + 'px');

        /*
        both the right and left of the
        navigation next and previous buttons will be:
        windowWidth/2 - imgWidth/2 + some margin (not to touch the image borders)
        */
        var position_nav = w_w / 2 - one_image_w / 2 - 35;
        $pxs_next.css('right', position_nav + 'px');
        $pxs_prev.css('left', position_nav + 'px');
    }

    var preloader = function() {

    }

    $.fn.parallaxSlider.defaults = {
        auto: 0, //how many seconds to periodically slide the content.
        //If set to 0 then autoplay is turned off.
        speed: 1000, //speed of each slide animation
        easing: 'jswing', //easing effect for the slide animation
        easingBg: 'jswing', //easing effect for the background animation
        circular: true, //circular slider
        thumbRotation: false//the thumbs will be randomly rotated
    };
    //easeInOutExpo,easeInBack
})(jQuery);