LightboxOptions = Object.extend({
    fileLoadingImage: 'http://www.meridianoffices.co.uk/images/loading.gif',
    fileBottomNavCloseImage: 'http://www.meridianoffices.co.uk/images/close.gif',
    overlayOpacity: 0.8,
    animate: true,
    resizeSpeed: 7,
    borderSize: 10,
    labelImage: "Image",
    labelOf: "of"
},
window.LightboxOptions || {});
var Lightbox = Class.create();
Lightbox.prototype = {
    imageArray: [],
    activeImage: undefined,
    initialize: function () {
        this.updateImageList();
        this.keyboardAction = this.keyboardAction.bindAsEventListener(this);
        if (LightboxOptions.resizeSpeed > 10) LightboxOptions.resizeSpeed = 10;
        if (LightboxOptions.resizeSpeed < 1) LightboxOptions.resizeSpeed = 1;
        this.resizeDuration = LightboxOptions.animate ? ((11 - LightboxOptions.resizeSpeed) * 0.15) : 0;
        this.overlayDuration = LightboxOptions.animate ? 0.2 : 0;
        var size = (LightboxOptions.animate ? 250 : 1) + 'px';
        var objBody = $$('body')[0];
        objBody.appendChild(Builder.node('div', {
            id: 'overlay'
        }));
        objBody.appendChild(Builder.node('div', {
            id: 'lightbox'
        },
        [Builder.node('div', {
            id: 'outerImageContainer'
        },
        Builder.node('div', {
            id: 'imageContainer'
        },
        [Builder.node('img', {
            id: 'lightboxImage'
        }), Builder.node('div', {
            id: 'hoverNav'
        },
        [Builder.node('a', {
            id: 'prevLink',
            href: '#'
        }), Builder.node('a', {
            id: 'nextLink',
            href: '#'
        })]), Builder.node('div', {
            id: 'loading'
        },
        Builder.node('a', {
            id: 'loadingLink',
            href: '#'
        },
        Builder.node('img', {
            src: LightboxOptions.fileLoadingImage
        })))])), Builder.node('div', {
            id: 'imageDataContainer'
        },
        Builder.node('div', {
            id: 'imageData'
        },
        [Builder.node('div', {
            id: 'imageDetails'
        },
        [Builder.node('span', {
            id: 'caption'
        }), Builder.node('span', {
            id: 'numberDisplay'
        })]), Builder.node('div', {
            id: 'bottomNav'
        },
        Builder.node('a', {
            id: 'bottomNavClose',
            href: '#'
        },
        Builder.node('img', {
            src: LightboxOptions.fileBottomNavCloseImage
        })))]))]));
        $('overlay').hide().observe('click', (function () {
            this.end()
        }).bind(this));
        $('lightbox').hide().observe('click', (function (event) {
            if (event.element().id == 'lightbox') this.end()
        }).bind(this));
        $('outerImageContainer').setStyle({
            width: size,
            height: size
        });
        $('prevLink').observe('click', (function (event) {
            event.stop();
            this.changeImage(this.activeImage - 1)
        }).bindAsEventListener(this));
        $('nextLink').observe('click', (function (event) {
            event.stop();
            this.changeImage(this.activeImage + 1)
        }).bindAsEventListener(this));
        $('loadingLink').observe('click', (function (event) {
            event.stop();
            this.end()
        }).bind(this));
        $('bottomNavClose').observe('click', (function (event) {
            event.stop();
            this.end()
        }).bind(this));
        var th = this;
        (function () {
            var ids = 'overlay lightbox outerImageContainer imageContainer lightboxImage hoverNav prevLink nextLink loading loadingLink ' + 'imageDataContainer imageData imageDetails caption numberDisplay bottomNav bottomNavClose';
            $w(ids).each(function (id) {
                th[id] = $(id)
            })
        }).defer()
    },
    updateImageList: function () {
        this.updateImageList = Prototype.emptyFunction;
        document.observe('click', (function (event) {
            var target = event.findElement('a[rel^=lightbox]') || event.findElement('area[rel^=lightbox]');
            if (target) {
                event.stop();
                this.start(target)
            }
        }).bind(this))
    },
    start: function (imageLink) {
        $$('select', 'object', 'embed').each(function (node) {
            node.style.visibility = 'hidden'
        });
        var arrayPageSize = this.getPageSize();
        $('overlay').setStyle({
            width: arrayPageSize[0] + 'px',
            height: arrayPageSize[1] + 'px'
        });
        new Effect.Appear(this.overlay, {
            duration: this.overlayDuration,
            from: 0.0,
            to: LightboxOptions.overlayOpacity
        });
        this.imageArray = [];
        var imageNum = 0;
        if ((imageLink.rel == 'lightbox')) {
            this.imageArray.push([imageLink.href, imageLink.title])
        } else {
            this.imageArray = $$(imageLink.tagName + '[href][rel="' + imageLink.rel + '"]').collect(function (anchor) {
                return [anchor.href, anchor.title]
            }).uniq();
            while (this.imageArray[imageNum][0] != imageLink.href) {
                imageNum++
            }
        }
        var arrayPageScroll = document.viewport.getScrollOffsets();
        var lightboxTop = arrayPageScroll[1] + (document.viewport.getHeight() / 10);
        var lightboxLeft = arrayPageScroll[0];
        this.lightbox.setStyle({
            top: lightboxTop + 'px',
            left: lightboxLeft + 'px'
        }).show();
        this.changeImage(imageNum)
    },
    changeImage: function (imageNum) {
        this.activeImage = imageNum;
        if (LightboxOptions.animate) this.loading.show();
        this.lightboxImage.hide();
        this.hoverNav.hide();
        this.prevLink.hide();
        this.nextLink.hide();
        this.imageDataContainer.setStyle({
            opacity: .0001
        });
        this.numberDisplay.hide();
        var imgPreloader = new Image();
        imgPreloader.onload = (function () {
            this.lightboxImage.src = this.imageArray[this.activeImage][0];
            this.resizeImageContainer(imgPreloader.width, imgPreloader.height)
        }).bind(this);
        imgPreloader.src = this.imageArray[this.activeImage][0]
    },
    resizeImageContainer: function (imgWidth, imgHeight) {
        var widthCurrent = this.outerImageContainer.getWidth();
        var heightCurrent = this.outerImageContainer.getHeight();
        var widthNew = (imgWidth + LightboxOptions.borderSize * 2);
        var heightNew = (imgHeight + LightboxOptions.borderSize * 2);
        var xScale = (widthNew / widthCurrent) * 100;
        var yScale = (heightNew / heightCurrent) * 100;
        var wDiff = widthCurrent - widthNew;
        var hDiff = heightCurrent - heightNew;
        if (hDiff != 0) new Effect.Scale(this.outerImageContainer, yScale, {
            scaleX: false,
            duration: this.resizeDuration,
            queue: 'front'
        });
        if (wDiff != 0) new Effect.Scale(this.outerImageContainer, xScale, {
            scaleY: false,
            duration: this.resizeDuration,
            delay: this.resizeDuration
        });
        var timeout = 0;
        if ((hDiff == 0) && (wDiff == 0)) {
            timeout = 100;
            if (Prototype.Browser.IE) timeout = 250
        } (function () {
            this.prevLink.setStyle({
                height: imgHeight + 'px'
            });
            this.nextLink.setStyle({
                height: imgHeight + 'px'
            });
            this.imageDataContainer.setStyle({
                width: widthNew + 'px'
            });
            this.showImage()
        }).bind(this).delay(timeout / 1000)
    },
    showImage: function () {
        this.loading.hide();
        new Effect.Appear(this.lightboxImage, {
            duration: this.resizeDuration,
            queue: 'end',
            afterFinish: (function () {
                this.updateDetails()
            }).bind(this)
        });
        this.preloadNeighborImages()
    },
    updateDetails: function () {
        if (this.imageArray[this.activeImage][1] != "") {
            this.caption.update(this.imageArray[this.activeImage][1]).show()
        }
        if (this.imageArray.length > 1) {
            this.numberDisplay.update(LightboxOptions.labelImage + ' ' + (this.activeImage + 1) + ' ' + LightboxOptions.labelOf + '  ' + this.imageArray.length).show()
        }
        new Effect.Parallel([new Effect.SlideDown(this.imageDataContainer, {
            sync: true,
            duration: this.resizeDuration,
            from: 0.0,
            to: 1.0
        }), new Effect.Appear(this.imageDataContainer, {
            sync: true,
            duration: this.resizeDuration
        })], {
            duration: this.resizeDuration,
            afterFinish: (function () {
                var arrayPageSize = this.getPageSize();
                this.overlay.setStyle({
                    height: arrayPageSize[1] + 'px'
                });
                this.updateNav()
            }).bind(this)
        })
    },
    updateNav: function () {
        this.hoverNav.show();
        if (this.activeImage > 0) this.prevLink.show();
        if (this.activeImage < (this.imageArray.length - 1)) this.nextLink.show();
        this.enableKeyboardNav()
    },
    enableKeyboardNav: function () {
        document.observe('keydown', this.keyboardAction)
    },
    disableKeyboardNav: function () {
        document.stopObserving('keydown', this.keyboardAction)
    },
    keyboardAction: function (event) {
        var keycode = event.keyCode;
        var escapeKey;
        if (event.DOM_VK_ESCAPE) {
            escapeKey = event.DOM_VK_ESCAPE
        } else {
            escapeKey = 27
        }
        var key = String.fromCharCode(keycode).toLowerCase();
        if (key.match(/x|o|c/) || (keycode == escapeKey)) {
            this.end()
        } else if ((key == 'p') || (keycode == 37)) {
            if (this.activeImage != 0) {
                this.disableKeyboardNav();
                this.changeImage(this.activeImage - 1)
            }
        } else if ((key == 'n') || (keycode == 39)) {
            if (this.activeImage != (this.imageArray.length - 1)) {
                this.disableKeyboardNav();
                this.changeImage(this.activeImage + 1)
            }
        }
    },
    preloadNeighborImages: function () {
        var preloadNextImage, preloadPrevImage;
        if (this.imageArray.length > this.activeImage + 1) {
            preloadNextImage = new Image();
            preloadNextImage.src = this.imageArray[this.activeImage + 1][0]
        }
        if (this.activeImage > 0) {
            preloadPrevImage = new Image();
            preloadPrevImage.src = this.imageArray[this.activeImage - 1][0]
        }
    },
    end: function () {
        this.disableKeyboardNav();
        this.lightbox.hide();
        new Effect.Fade(this.overlay, {
            duration: this.overlayDuration
        });
        $$('select', 'object', 'embed').each(function (node) {
            node.style.visibility = 'visible'
        })
    },
    getPageSize: function () {
        var xScroll, yScroll;
        if (window.innerHeight && window.scrollMaxY) {
            xScroll = window.innerWidth + window.scrollMaxX;
            yScroll = window.innerHeight + window.scrollMaxY
        } else if (document.body.scrollHeight > document.body.offsetHeight) {
            xScroll = document.body.scrollWidth;
            yScroll = document.body.scrollHeight
        } else {
            xScroll = document.body.offsetWidth;
            yScroll = document.body.offsetHeight
        }
        var windowWidth, windowHeight;
        if (self.innerHeight) {
            if (document.documentElement.clientWidth) {
                windowWidth = document.documentElement.clientWidth
            } else {
                windowWidth = self.innerWidth
            }
            windowHeight = self.innerHeight
        } else if (document.documentElement && document.documentElement.clientHeight) {
            windowWidth = document.documentElement.clientWidth;
            windowHeight = document.documentElement.clientHeight
        } else if (document.body) {
            windowWidth = document.body.clientWidth;
            windowHeight = document.body.clientHeight
        }
        if (yScroll < windowHeight) {
            pageHeight = windowHeight
        } else {
            pageHeight = yScroll
        }
        if (xScroll < windowWidth) {
            pageWidth = xScroll
        } else {
            pageWidth = windowWidth
        }
        return [pageWidth, pageHeight]
    }
}
document.observe('dom:loaded', function () {
    new Lightbox()
});