/*
	Authors:
	Christophe Beyls ([url=http://www.digitalia.be]http://www.digitalia.be[/url]); MIT-style license.
	Inspired by the original Lightbox v2 by Lokesh Dhakar.
	Refactored by Aaron Newton <aaron [dot] newton [at] cnet [dot] com>
	Modified by Chris Martin <chris [dot] martin [at] redantdesign [dot] com>
*/
var Lightbox = new Class({
    options: {
        resizeDuration: 400,
        resizeTransition: false, // default transition
        initialWidth: 250,
        initialHeight: 250,
        animateCaption: true,
        showCounter: true,
        autoScanLinks: true,
        relString: 'lightbox',
        useDefaultCss: true,
        assetBaseUrl: '/_css/',
        onImageShow: function() {
            $$(".freeDelivery")[0].setStyles({ display: 'none' });
            $$(".featured-actions")[0].setStyles({ display: 'none' });
                    },
        onDisplay: Class.empty,
        onHide: function() {
            $$(".freeDelivery")[0].setStyles({ display: 'block' });
            $$(".featured-actions")[0].setStyles({ display: 'block' });
        }
    },

    initialize: function(options, anchors) {
        this.setOptions(options);
        if (this.options.useDefaultCss) this.addCss();
        this.anchors = anchors || [];
        if (this.options.autoScanLinks) {
            $each(document.links, function(el) {
                if (el.rel && el.rel.test("^" + this.options.relString, 'i')) {
                    this.anchors.push(el);
                }
            }, this);
        }
        $$(this.anchors).each(function(el) {
            if (!el.getProperty('rel')) el.setProperty('rel', this.options.relString);
            el.addEvent('click', function(e) {
                new Event(e).stop();
                this.click(el);
            } .bind(this));
        } .bind(this));
        this.eventKeyDown = this.keyboardListener.bindAsEventListener(this);
        this.eventPosition = this.position.bind(this);
        window.addEvent('domready', this.addHtmlElements.bind(this));
    },

    addHtmlElements: function() {
        if ($("lbOverlay")) {
            $("lbOverlay").remove();
            $("lbCenter").remove();
            $("lbBottomContainer").remove();
        }
        this.overlay = new Element('div', { 'id': 'lbOverlay' }).injectInside(document.body);
        this.center = new Element('div', { 'id': 'lbCenter', 'styles': { 'width': this.options.initialWidth, 'height': this.options.initialHeight, 'marginLeft': -(this.options.initialWidth / 2), 'display': 'none'} }).injectInside(document.body);
        this.image = new Element('div', { 'id': 'lbImage' }).injectInside(this.center);
        this.prevLink = new Element('a', { 'id': 'lbPrevLink', 'href': '#', 'styles': { 'display': 'none'} }).injectInside(this.image);
        this.nextLink = this.prevLink.clone().setProperty('id', 'lbNextLink').injectInside(this.image);
        this.prevLink.addEvent('click', this.previous.bindWithEvent(this));
        this.nextLink.addEvent('click', this.next.bindWithEvent(this));

        this.bottomContainer = new Element('div', { 'id': 'lbBottomContainer', 'styles': { 'display': 'none'} }).injectInside(document.body);
        this.bottom = new Element('div', { 'id': 'lbBottom' }).injectInside(this.bottomContainer);
        new Element('a', { 'id': 'lbCloseLink', 'href': '#' }).injectInside(this.bottom).onclick = this.overlay.onclick = this.close.bind(this);
        this.caption = new Element('div', { 'id': 'lbCaption' }).injectInside(this.bottom);
        this.number = new Element('div', { 'id': 'lbNumber' }).injectInside(this.bottom);
        new Element('div', { 'styles': { 'clear': 'both'} }).injectInside(this.bottom);

        var nextEffect = this.nextEffect.bind(this);
        this.fx = {
            overlay: this.overlay.effect('opacity', { duration: 500 }).hide(),
            resize: this.center.effects($extend({ duration: this.options.resizeDuration, onComplete: nextEffect }, this.options.resizeTransition ? { transition: this.options.resizeTransition} : {})),
            image: this.image.effect('opacity', { duration: 500, onComplete: nextEffect }),
            bottom: this.bottom.effect('margin-top', { duration: 400, onComplete: nextEffect })
        };

        this.preloadPrev = new Image();
        this.preloadNext = new Image();
    },

    addCss: function() {
        if (!$('SlimboxCss')) window.addEvent('domready', function() {
            new Asset.css(this.options.assetBaseUrl + 'slimbox.css', { id: 'SlimboxCss' });
        } .bind(this));
    },

    click: function(link) {
        if (link.rel == this.options.relString) return this.show(link.href, link.title);

        var j, imageNum, images = [];
        this.anchors.each(function(el) {
            if (el.rel == link.rel) {
                for (j = 0; j < images.length; j++) if (images[j][0] == el.href) break;
                if (j == images.length) {
                    images.push([el.href, el.title]);
                    if (el.href == link.href) imageNum = j;
                }
            }
        }, this);
        return this.open(images, imageNum);
    },

    show: function(url, title) {
        return this.open([[url, title]], 0);
    },

    open: function(images, imageNum) {
        this.fireEvent('onDisplay');
        this.images = images;
        this.position();
        this.setup(true);
        this.top = window.getScrollTop() + (window.getHeight() / 15);
        this.center.setStyles({ top: this.top, display: '' });
        this.fx.overlay.start(0.8);
        return this.changeImage(imageNum);
    },

    position: function() {
        this.overlay.setStyles({ 'top': window.getScrollTop(), 'height': window.getHeight() });
    },

    setup: function(open) {
        var elements = $A(document.getElementsByTagName('object'));
        elements.extend(document.getElementsByTagName(window.ie ? 'select' : 'embed'));
        elements.each(function(el) {
            if (open) el.lbBackupStyle = el.style.visibility;
            el.style.visibility = open ? 'hidden' : el.lbBackupStyle;
        });
        var fn = open ? 'addEvent' : 'removeEvent';
        window[fn]('scroll', this.eventPosition)[fn]('resize', this.eventPosition);
        document[fn]('keydown', this.eventKeyDown);
        this.step = 0;
    },

    keyboardListener: function(event) {
        switch (event.keyCode) {
            case 27: case 88: case 67: this.close(); break;
            case 37: case 80: this.previous(); break;
            case 39: case 78: this.next();
        }
    },

    previous: function(e) {
        new Event(e).stop();
        return this.changeImage(this.activeImage - 1);
    },

    next: function(e) {
        new Event(e).stop();
        return this.changeImage(this.activeImage + 1);
    },

    changeImage: function(imageNum) {
        this.fireEvent('onImageShow', imageNum);
        if (this.step || (imageNum < 0) || (imageNum >= this.images.length)) return false;
        this.step = 1;
        this.activeImage = imageNum;

        this.center.style.backgroundColor = '';
        this.bottomContainer.style.display = this.prevLink.style.display = this.nextLink.style.display = 'none';
        this.fx.image.hide();
        this.center.className = 'lbLoading';

        this.preload = new Image();
        this.preload.onload = this.nextEffect.bind(this);
        this.preload.src = this.images[imageNum][0];
        return false;
    },

    nextEffect: function() {
        switch (this.step++) {
            case 1:
                this.center.className = '';
                this.image.style.backgroundImage = 'url("' + this.images[this.activeImage][0] + '")';
                this.image.style.width = this.bottom.style.width = this.preload.width + 'px';
                this.image.style.height = this.prevLink.style.height = this.nextLink.style.height = this.preload.height + 'px';

                this.caption.setHTML(this.images[this.activeImage][1] || '');
                this.number.setHTML((!this.options.showCounter || (this.images.length == 1)) ? '' : 'Image ' + (this.activeImage + 1) + ' of ' + this.images.length);

                if (this.activeImage) this.preloadPrev.src = this.images[this.activeImage - 1][0];
                if (this.activeImage != (this.images.length - 1)) this.preloadNext.src = this.images[this.activeImage + 1][0];
                if (this.center.clientHeight != this.image.offsetHeight) {
                    this.fx.resize.start({ height: this.image.offsetHeight });
                    break;
                }

                if (this.images.length > this.activeItem) this.nextLink.style.display = '';
                if (this.activeItem == this.images.length - 1) this.nextLink.style.display = 'none';
                if (this.activeItem > 0) this.prevLink.style.display = '';

                this.step++;
            case 2:
                if (this.center.clientWidth != this.image.offsetWidth) {
                    this.fx.resize.start({ width: this.image.offsetWidth, marginLeft: -this.image.offsetWidth / 2 });
                    break;
                }
                this.step++;
            case 3:
                this.bottomContainer.setStyles({ top: this.top + this.center.clientHeight, height: 0, marginLeft: this.center.style.marginLeft, display: '' });
                this.fx.image.start(1);
                break;
            case 4:
                this.center.style.backgroundColor = '#000';
                if (this.options.animateCaption) {
                    this.fx.bottom.set(-this.bottom.offsetHeight);
                    this.bottomContainer.style.height = '';
                    this.fx.bottom.start(0);
                    break;
                }
                this.bottomContainer.style.height = '';
            case 5:
                if (this.activeImage) this.prevLink.style.display = '';
                if (this.activeImage != (this.images.length - 1)) this.nextLink.style.display = '';
                this.step = 0;
        }
    },

    close: function() {
        this.fireEvent('onHide');
        if (this.step < 0) return;
        this.step = -1;
        if (this.preload) {
            this.preload.onload = Class.empty;
            this.preload = null;
        }
        for (var f in this.fx) this.fx[f].stop();
        this.center.style.display = this.bottomContainer.style.display = 'none';
        this.fx.overlay.chain(this.setup.pass(false, this)).start(0);
        return false;
    }
});
Lightbox.implement(new Options);
Lightbox.implement(new Events);