// -----------------------------------------------------------------------
// Eros Fratini - eros@recoding.it
// jquery.showcase 2.0.2
//
// 02/11/2010 - Fixed and issue with jQuery 1.4.3, some tests with IE9 beta
// 26/04/2010 - Begin some changes
// 02/02/2010 - Wow, a fix about 10 minute after release....
// 02/02/2010 - Debugging and demos
// 27/12/2009 - Optimized animation, added functions to pause and resume autocycling
//			  - Tested external ease functions		
// 24/12/2009 - Added a lot of settings, redefine css
// 21/12/2009 - Begin to write v2.0
// 27/07/2009 - Added asynchronous loading of images
// 26/06/2009 - some new implementations
// 19/06/2009 - standardization
// 08/06/2009 - Initial sketch
//
// requires jQuery 1.3.x+
//------------------------------------------------------------------------
(function ($) {
    $.fn.showcase = function (options) {
        var $container = this;

        // Retrieve options
        var opt;
        opt = $.extend({}, $.fn.showcase.defaults, options);

        if (!/images|titles/.test(opt.linksOn)) {
            opt.linksOn = "images";
        }
        if (options && options.css) {
            opt.css = $.extend({}, $.fn.showcase.defaults.css, options.css);
        }
        if (options && options.animation) {
            opt.animation = $.extend({}, $.fn.showcase.defaults.animation, options.animation);
            if (!/horizontal-slider|vertical-slider|fade/.test(opt.animation.type)) {
                opt.animation.type = "horizontal-slider";
            }
        }
        if (options && options.navigator) {
            opt.navigator = $.extend({}, $.fn.showcase.defaults.navigator, options.navigator);

            if (!/top-left|top-right|bottom-left|bottom-right/.test(opt.navigator.position)) {
                opt.navigator.position = "top-right";
            }

            if (!/horizontal|vertical/.test(opt.navigator.orientation)) {
                opt.navigator.orientation = "horizontal";
            }

            if (options.navigator.css) {
                opt.navigator.css = $.extend({}, $.fn.showcase.defaults.navigator.css, options.navigator.css);
            }

            if (options.navigator.item) {
                opt.navigator.item = $.extend({}, $.fn.showcase.defaults.navigator.item, options.navigator.item);
                // Progressive extensions of hover and selected states, inherited by standard css properties
                opt.navigator.item.cssHover = $.extend({}, $.fn.showcase.defaults.navigator.item.css, $.fn.showcase.defaults.navigator.item.cssHover);
                opt.navigator.item.cssSelected = $.extend({}, $.fn.showcase.defaults.navigator.item.css, $.fn.showcase.defaults.navigator.item.cssSelected);

                if (options.navigator.item.css) {
                    opt.navigator.item.css = $.extend({}, $.fn.showcase.defaults.navigator.item.css, options.navigator.item.css);
                    opt.navigator.item.cssHover = $.extend({}, $.fn.showcase.defaults.navigator.item.cssHover, options.navigator.item.css);
                    opt.navigator.item.cssSelected = $.extend({}, $.fn.showcase.defaults.navigator.item.cssSelected, options.navigator.item.css);
                }
                if (options.navigator.item.cssHover) { opt.navigator.item.cssHover = $.extend({}, $.fn.showcase.defaults.navigator.item.cssHover, options.navigator.item.cssHover); }
                if (options.navigator.item.cssSelected) { opt.navigator.item.cssSelected = $.extend({}, $.fn.showcase.defaults.navigator.item.cssSelected, options.navigator.item.cssSelected); }
            }
        }

        if (options && options.titleBar) {
            opt.titleBar = $.extend({}, $.fn.showcase.defaults.titleBar, options.titleBar);
            if (!/bottom|top/.test(opt.titleBar.position)) {
                opt.titleBar.position = "bottom";
            }

            if (options.titleBar.css) { opt.titleBar.css = $.extend({}, $.fn.showcase.defaults.titleBar.css, options.titleBar.css); }
        }

        // Setup of container
        $container.css(opt.css);

        // Check loading mode.
        // If there's something in opt.images[], I'll load them asynchronously, 
        // it will be nice to have width and height setted, in order to define the $container sizes
        if (opt.images.length != 0) {
            $container.css({ width: opt.css.width, height: opt.css.height, overflow: "hidden" });
            for (var i in opt.images) {
                var img = new Image();
                img.src = opt.images[i].url;
                img.alt = opt.images[i].description || "";
                var $link = $("<a />").attr({ "href": opt.images[i].link || "#", "target": opt.images[i].target || "_self" });
                $link.append(img);
                $container.append($link);
            }
        }

        // Check loading state of #1 image
        if ($container.find("img:first")[0].complete) {
            $.fn.showcase.start($container, opt);
        }
        else {
            $container.find("img:first").load(function () {
                $.fn.showcase.start($container, opt);
            });
        }

        // functions to control the playback of showcase
        $.fn.extend({
            pause: function () { $container.data("stopped", true); },
            go: function () { $container.data("stopped", false); }
        })
    };

    // This will start all showcase's stuffs
    $.fn.showcase.start = function ($container, opt) {
        // Define local vars
        var index = 0;
        var nImages = $container.find("img").length;
        var $fi = $container.find("img:first");
        var imagesize = { width: $fi.removeAttr("width").width(), height: $fi.removeAttr("height").height() };

        $.fn.showcase.imagesize = imagesize;
        $.fn.showcase.options = opt;

//        opt.css.width = imagesize.width;
//        opt.css.height = imagesize.height;

        // Redefine size of container
        $container.css({ width: opt.css.width, height: opt.css.height });
        $container.find("a").css({ position: "absolute", top: "0", left: "0" })
                  .find("img").css("border", "0px");

        // setup navigator
        var $slider = $("<div id='slider' />").css({ position: "absolute" });
        var $divNavigator = $("<div id='navigator' />").css(opt.navigator.css);

        switch (opt.navigator.position) {
            case "top-left": $divNavigator.css({ top: "0px", left: "0px" });
                break;
            case "top-right": $divNavigator.css({ top: "0px", right: "0px" });
                break;
            case "bottom-left": $divNavigator.css({ bottom: "0px", left: "0px" });
                break;
            case "bottom-right": $divNavigator.css({ bottom: "0px", right: "0px" });
                break;
        }

        $container.append($divNavigator).hover(
            function () {
                if (opt.titleBar.autoHide && opt.titleBar.enabled) {
                    $($titleBar).stop().animate({ opacity: opt.titleBar.css.opacity, left: 0, right: 0, height: opt.titleBar.css.height }, 250);
                }
                if (opt.navigator.autoHide) { $($divNavigator).stop().animate({ opacity: 1 }, 250); }
                $(this).data("isMouseHover", true);
            },
            function () {
                if (opt.titleBar.autoHide && opt.titleBar.enabled) {
                    $titleBar.stop().animate({ opacity: 0, height: "0px" }, 400);
                }
                if (opt.navigator.autoHide) { $divNavigator.stop().animate({ opacity: 0 }, 250); }
                $(this).data("isMouseHover", false);
            }
        );

        $container.find("a").wrapAll($slider).each(function (i) {
            switch (opt.animation.type) {
                case "horizontal-slider":
                    $(this).css("left", i * imagesize.width);
                    break;
                case "vertical-slider":
                    $(this).css("top", i * imagesize.height);
                    break;
                case "fade":
                    $(this).css({ top: "0", left: "0", opacity: 1, "z-index": 1000 - i });
                    break;
            }

            // Create navigation bar item
            var $navElement = $("<a href='#'>" + (opt.navigator.showNumber ? (i + 1) : "") + "</a>")
                                .css({ display: "block",
                                    "text-decoration": "none",
                                    "-moz-outline-style": "none"
                                })
                                .click(function () {
                                    if (opt.animation.autoCycle) { clearInterval(opt.animation.intervalID); } // stop the current automatic animation
                                    $.fn.showcase.showImage(i, $container, imagesize, opt);
                                    index = i;
                                    if (opt.animation.autoCycle) { opt.animation.intervalID = showcaseCycler(index, nImages, $container, imagesize, opt); } // restart the automatic animation
                                    return false;
                                })
                                .hover(
                                	function () {
                                	    if (!$(this).data("selected")) {
                                	        if (opt.navigator.item.cssClassHover)
                                	        { $(this).addClass(opt.navigator.item.cssClassHover); }
                                	        else
                                	        { $(this).css(opt.navigator.item.cssHover); }
                                	    }
                                	},
                                	function () {
                                	    if (!$(this).data("selected")) {
                                	        if (opt.navigator.item.cssClassHover)
                                	        { $(this).removeClass(opt.navigator.item.cssClassHover); }
                                	        else
                                	        { $(this).css(opt.navigator.item.css); }
                                	    }
                                	}
                                )
                                .appendTo($divNavigator);

            if (opt.navigator.item.cssClass) { $navElement.attr("class", opt.navigator.item.cssClass); }
            else {
                $.extend({}, $navElement.css, opt.navigator.item);
                $navElement.css(opt.navigator.item.css);
            }

            switch (opt.navigator.orientation) {
                case "horizontal":
                    $navElement.css("float", "left");
                    break;
                case "vertical":
                    $navElement.css("float", "none");
                    break;
            }

            if (opt.navigator.showMiniature) {
                $("<img />").attr({ src: $("img", this).attr("src"), width: $navElement.innerWidth(), height: $navElement.innerHeight(), border: "0px" }).appendTo($navElement);
            }
        });

        if (opt.navigator.autoHide) {
            $divNavigator.css("opacity", 0);
        }

        // Create titleBar
        if (opt.titleBar.enabled) {
            if (opt.linksOn == "images") {
                var $titleBar = $("<div id='subBar' />").html($("<span />").html($container.find("a:first img").attr("alt")));
            }
            else {
                var $a = $("<a />").attr("href", $container.find("a:first").attr("href")).html("<span>" + $container.find("a:first img").attr("alt") + "</span>");
                var $titleBar = $("<div id='subBar' />").html($a);

                $container.find("#slider a").each(function () {
                    $(this).attr("rel", $(this).attr("href"));
                });
                $container.find("#slider a").removeAttr("href");
            }

            $titleBar.css({
                opacity: 0.50,
                width: "100%",
                overflow: "hidden",
                "z-index": 10002,
                position: "absolute"
            });

            if (opt.titleBar.position == "top") { $titleBar.css("top", "0"); }
            else { $titleBar.css("bottom", "0"); }

            if (opt.titleBar.cssClass) { $titleBar.attr("class", opt.titleBar.cssClass); }
            else {
                $titleBar.css(opt.titleBar.css);
                $("a", $titleBar).css("color", opt.titleBar.css.color);
            }

            if (opt.titleBar.autoHide) {
                $titleBar.css({
                    "height": "0px",
                    "opacity": 0
                });
            }
            $titleBar.appendTo($container);
        }

        // set first image as selected
        $.fn.showcase.setNavigationItem(0, $container, opt);

        // startup cycling
        if (opt.animation.autoCycle) {
            opt.animation.intervalID = showcaseCycler(index, nImages, $container, imagesize, opt);
        }
    };

    var showcaseCycler = function (index, nImages, $container, imagesize, opt) {
        return setInterval(function () {
            if (!$container.data("stopped")) {
                if (!$container.data("isMouseHover") || !opt.animation.stopOnHover)
                    $.fn.showcase.showImage(++index % nImages, $container, imagesize, opt);
            }
        }, opt.animation.interval);
    };

    $.fn.showcase.showImage = function (i, $container, imagesize, opt) {
        var $a = $container.find("a");
        var $a_this = $container.find("a").eq(i);

        switch (opt.animation.type) {
            case "horizontal-slider": $container.find("#slider").stop().animate({ left: -(i * imagesize.width) }, opt.animation.speed, opt.animation.easefunction);
                break;
            case "vertical-slider": $container.find("#slider").stop().animate({ top: -(i * imagesize.height) }, opt.animation.speed, opt.animation.easefunction);
                break;
            case "fade":
                $container.css({ "z-index": "1001" });
                if ($a_this.css("z-index") != "1000") {
                    $a_this.css({ "z-index": "1000", opacity: 0 });

                    $a.not($a_this).each(function () {
                        if ($(this).css("z-index") != "auto")
                            $(this).css("z-index", parseInt($(this).css("z-index"), 10) - 1);
                    });

                    $a_this.stop().animate({ opacity: 1 }, opt.animation.speed, opt.animation.easefunction);
                }
                break;
        }

        if (opt.titleBar.enabled) {
            if (opt.linksOn == "titles") {
                $("#subBar a", $container).attr({
                    "href": $a_this.attr("rel"), "target": $a_this.attr("target")
                });
            }
        }
        $("#subBar span", $container).html($a_this.find("img").attr("alt"));
        // Setting selected navigationItem
        $.fn.showcase.setNavigationItem(i, $container, opt);
    };

    // Highlight the navigationItem related to image
    $.fn.showcase.setNavigationItem = function (i, $container, opt) {
        if (opt.navigator.item.cssClassSelected) {
            $container.find("#navigator a").removeClass(opt.navigator.item.cssClassSelected).data("selected", false);
            $container.find("#navigator a").eq(i).addClass(opt.navigator.item.cssClassSelected).data("selected", true);
        }
        else {
            if (opt.navigator.item.cssClass) {
                //$container.find("#navigator a").removeAttr("style").data("selected", false);
                $container.find("#navigator a").eq(i).css(opt.navigator.item.cssSelected).data("selected", true);
            }
            else {
                $container.find("#navigator a").css(opt.navigator.item.css).data("selected", false);
                $container.find("#navigator a").eq(i).css(opt.navigator.item.cssSelected).data("selected", true);
            }
        }

        opt.onImageSwitch(i);
    };

    $.fn.showcase.defaults = {
        images: [],
        linksOn: "images",
        css: { position: "relative",
            overflow: "hidden",
            border: "none",
            width: "",
            height: ""
        },
        animation: { autoCycle: true,
            stopOnHover: true,
            interval: 4000,
            speed: 500,
            easefunction: "swing",
            type: "horizontal-slider"
        },
        onImageSwitch: function (index) {
        },
        navigator: { css: { border: "none",
            padding: "5px",
            margin: "0px",
            position: "absolute",
            "z-index": 1000
        },
            position: "top-right",
            orientation: "horizontal",
            autoHide: false,
            showNumber: false,
            showMiniature: false,
            item: { cssClass: null,
                cssClassHover: null,
                cssClassSelected: null,
                css: {
                    color: "#000000",
                    "text-decoration": "none",
                    "text-align": "center",
                    "-moz-outline-style": "none",
                    width: "12px",
                    height: "12px",
                    lineHeight: "12px",
                    verticalAlign: "middle",
                    backgroundColor: "#878787",
                    margin: "0px 3px 3px 0px",
                    border: "solid 1px #acacac",
                    "border-radius": "4px",
                    "-moz-border-radius": "4px",
                    "-webkit-border-radius": "4px"
                },
                cssHover: {
                    backgroundColor: "#767676",
                    border: "solid 1px #676767"
                },
                cssSelected: {
                    backgroundColor: "#00FF00",
                    border: "solid 1px #acacac"
                }
            }
        },
        titleBar: { enabled: true,
            autoHide: true,
            position: "bottom",
            cssClass: null,
            css: { opacity: 0.50,
                color: "#ffffff",
                backgroundColor: "#000000",
                height: "40px",
                padding: "4px",
                fontColor: "#444444",
                fontStyle: "italic",
                fontWeight: "bold",
                fontSize: "1em"
            }
        }
    };
})(jQuery);