// -----------------------------------------------------------------------------------
//
//	Lightbox v2.04
//	by Lokesh Dhakar - http://www.lokeshdhakar.com
//	Last Modification: 2/9/08
//
//	For more information, visit:
//	http://lokeshdhakar.com/projects/lightbox2/
//
//	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
//  	- Free for use in both personal and commercial projects
//		- Attribution requires leaving author name, author link, and the license info intact.
//	
//  Thanks: Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.com), and Thomas Fuchs(mir.aculo.us) for ideas, libs, and snippets.
//  		Artemy Tregubenko (arty.name) for cleanup and help in updating to latest ver of proto-aculous.
//
// -----------------------------------------------------------------------------------
/*

Table of Contents
-----------------
Configuration

Lightbox Class Declaration
- initialize()
- updateImageList()
- start()
- changeImage()
- resizeImageContainer()
- showImage()
- updateDetails()
- updateNav()
- enableKeyboardNav()
- disableKeyboardNav()
- keyboardAction()
- preloadNeighborImages()
- end()
    
Function Calls
- document.observe()
   
*/

// FONCTIONS POUR INTÉRAGIR AVEC LE PLAYER
var ytplayer = "";
function onYouTubePlayerReady(playerId) {
    ytplayer = document.getElementById("myytplayer");
    ytplayer.addEventListener("onStateChange", "onytplayerStateChange");
    ytplayer.addEventListener("onError", "onPlayerError");
}

function onytplayerStateChange(newState) {
    setytplayerState(newState);
}

function onPlayerError(errorCode) {
    alert("An error occured: " + errorCode);
}
function stopYoutubeVideo() {
    if (ytplayer) {
        ytplayer.stopVideo();
    }
}

// -----------------------------------------------------------------------------------

//
//  Configurationl
//
LightboxOptions = Object.extend({
	fileLoadingImage: '/_layouts/PortailMapaq/images/loading.gif',
	fileBottomNavCloseImage: '/_layouts/PortailMapaq/images/closelabel.gif',

	overlayOpacity: 0.6,   // controls transparency of shadow overlay

	animate: true,         // toggles resizing animations
	resizeSpeed: 9,        // controls the speed of the image resizing animations (1=slowest and 10=fastest)

	borderSize: 10,         //if you adjust the padding in the CSS, you will need to update this variable

	// When grouping images this is used to write: Image # of #.
	// Change it for non-english localization
	labelImage: "",
	labelOf: "sur",
	labelNextImage: "image suivante",
	labelPreviousImage: "image précédente",
	labelCloseWindow: "Fermer cette fenêtre"
}, window.LightboxOptions || {});

// -----------------------------------------------------------------------------------


var Lightbox = Class.create();

Lightbox.prototype = {
    imageArray: [],
    activeImage: undefined,

    // initialize()
    // Constructor runs on completion of the DOM loading. Calls updateImageList and then
    // the function inserts html at the bottom of the page which is used to display the shadow 
    // overlay and the image container.
    //
    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;  // shadow fade in/out duration

        // When Lightbox starts it will resize itself from 250 by 250 to the current image dimension.
        // If animations are turned off, it will be hidden as to prevent a flicker of a
        // white 250 by 250 box.
        var size = (LightboxOptions.animate ? 250 : 1) + 'px';


        // Code inserts html at the bottom of the page that looks similar to this:
        //
        //  <div id="overlay"></div>
        //  <div id="lightbox">
        //      <div id="outerImageContainer">
        //          <div id="imageContainer">
        //              <img id="lightboxImage">
        //              <div style="" id="hoverNav">
        //                  <a href="#" id="prevLink"></a>
        //                  <a href="#" id="nextLink"></a>
        //              </div>
        //              <div id="loading">
        //                  <a href="#" id="loadingLink">
        //                      <img src="images/loading.gif">
        //                  </a>
        //              </div>
        //          </div>
        //      </div>
        //      <div id="imageDataContainer">
        //          <div id="imageData">
        //              <div id="imageDetails">
        //                  <span id="caption"></span>
        //                  <span id="numberDisplay"></span>
        //              </div>
        //              <div id="bottomNav">
        //                  <a href="#" id="bottomNavClose">
        //                      <img src="images/close.gif">
        //                  </a>
        //              </div>
        //          </div>
        //      </div>
        //  </div>


        var objBody = $$('body')[0];

        objBody.appendChild(Builder.node('div', { id: 'overlay' }));

        objBody.appendChild(Builder.node('a', { id: 'hiddenLinkTop', 'class': 'hors-champ', href: '#' }));

        objBody.appendChild(Builder.node('div', { id: 'youtube', tabindex: '-1' }));

        objBody.appendChild(Builder.node('div', { id: 'lightbox', tabindex: '-1' }, [
            
            
            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('span', { 'class': 'hors-champ' }, LightboxOptions.labelPreviousImage)]),
                        Builder.node('a', { id: 'nextLink', href: '#' },
							[Builder.node('span', { 'class': 'hors-champ' }, LightboxOptions.labelNextImage)]),
                    ]),
                    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, alt: LightboxOptions.labelCloseWindow })
                        )
                    ),
                    Builder.node('a', { id: 'hiddenLink', 'class': 'hors-champ', href: '#' })
                ])
            )
            
        ]));


        $('overlay').hide().observe('click', (function() { this.end(); }).bind(this));
        $('lightbox').hide().observe('click', (function(event) { if (event.element().id == 'lightbox') this.end(); }).bind(this));
        $('youtube').hide();
        $('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) {
            this.end(); event.stop();
        }).bind(this));
        $('hiddenLinkTop').observe('focus', (function() { this.end(); }).bind(this));
        $('hiddenLink').observe('focus', (function() { this.end(); }).bind(this));

        var th = this;
        (function() {
            var ids =
                'overlay hiddenLinkTop lightbox youtube outerImageContainer imageContainer lightboxImage hoverNav prevLink nextLink loading loadingLink ' +
                'imageDataContainer imageData imageDetails caption numberDisplay bottomNav bottomNavClose hiddenLink';
            $w(ids).each(function(id) { th[id] = $(id); });
        }).defer();
    },

    //
    // updateImageList()
    // Loops through anchor tags looking for 'lightbox' references and applies onclick
    // events to appropriate links. You can rerun after dynamically adding images w/ajax.
    //
    updateImageList: function() {
        this.updateImageList = Prototype.emptyFunction;

        document.observe('click', (function(event) {
            var target = event.findElement('a[rel^=lightbox]') || event.findElement('area[rel^=lightbox]') || event.findElement('a[rel^=youtube]');
            if (target) {
                event.stop();
                target.id = 'lightbox_actif';
                this.start(target);
            }
        }).bind(this));
    },

    //
    //  start()
    //  Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
    //
    start: function(imageLink) {

        $$('select', 'object', 'embed').each(function(node) { node.style.visibility = 'hidden' });

        // stretch overlay to fill page and fade in
        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')) {
            // if image is NOT part of a set, add single image to imageArray
            this.imageArray.push([imageLink.href, imageLink.title]);
        } else if ((imageLink.rel == 'youtube')) {
            var arrayPageScroll = document.viewport.getScrollOffsets();
            var lightboxTop = arrayPageScroll[1] + (document.viewport.getHeight() / 10);
            var lightboxLeft = arrayPageScroll[0];
            this.youtube.setStyle({ top: lightboxTop + 'px' });
            this.youtube.innerHTML = '';

            // Prépare le lien pour fermer le lightbox et ajoute l'image dans celui-ci. 
            var imgClose = Builder.node('img', { src: LightboxOptions.fileBottomNavCloseImage, alt: LightboxOptions.labelCloseWindow });
            var linkImgClose = Builder.node('a', { id: 'bottomNavClose', href: '#' }, [imgClose]);

            // Ajoute le div movie dans la page et lui donne le lien pour fermer en enfant
            this.youtube.appendChild(Builder.node('div', { id: 'notreMovie' }, [Builder.node('div', { id: 'bottomNav' }, linkImgClose)]));

            // Ajoute le embed youtube à la fin du Div movie
            //var embedYoutube = Builder.node('embed', { src: imageLink.title + "&enablejsapi=1&playerapiid=ytplayer", type: 'application/x-shockwave-flash', allowscriptaccess: 'always', allowfullscreen: 'true', width: '640', height: '385', id: 'videoYoutube' });

            var texteSansFlash = "Pour visionnez cette vidéo, vous avez besoin de Flash player version 8 ou plus et votre navigateur doit supporter le javascript."
            var videoYoutube = Builder.node('div', { id: 'encapsulePlayer' }, [Builder.node('p', { id: 'texteSansFlash' }, texteSansFlash)]);

            jQuery('#notreMovie').append(videoYoutube);

            this.youtube.appendChild(Builder.node('a', { id: 'hiddenLink', 'class': 'hors-champ', href: '#' }));
            $('bottomNavClose').observe('click', (function(event) { stopYoutubeVideo(); this.end();  event.stop(); }).bind(this));
            $('youtube').show().observe('click', (function(event) { if (event.element().id == 'youtube') this.end();  }).bind(this));
            $('hiddenLink').observe('focus', (function() { this.end(); }).bind(this));
            this.enableKeyboardNav();
            this.youtube.focus();

            var params = { allowScriptAccess: "always" };
            var atts = { id: "myytplayer" };

            // SI LE URL YOUTUBE À DES PARAMETRES DANS LE QUERY STRING, IL FAUT LES ENLEVER
            // SINON LE PLAYER LE DÉCLENCHERA JAMAIS L'ÉVÈNEMENT onYouTubePlayerReady()
            posParametre = imageLink.title.indexOf("?");
            if (posParametre > 0) {
                imageLink.title = imageLink.title.substring(0, posParametre);
            }

            swfobject.embedSWF(imageLink.title + "?enablejsapi=1&version=3&playerapiid=ytplayer", "encapsulePlayer", "640", "385", "8", null, null, params, atts);

        } else {
            // if image is part of a set..
            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++; }
        }

        if ((imageLink.rel != 'youtube')) {
            // calculate top and left offset for the lightbox 
            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);
            this.lightbox.focus();
        }
    },

    //
    //  changeImage()
    //  Hide most elements and preload image in preparation for resizing image container.
    //
    changeImage: function(imageNum) {

        this.activeImage = imageNum; // update global var

        // hide elements during transition
        if (LightboxOptions.animate) this.loading.show();
        this.lightboxImage.hide();
        this.hoverNav.hide();
        this.prevLink.hide();
        this.nextLink.hide();
        // HACK: Opera9 does not currently support scriptaculous opacity and appear fx
        this.imageDataContainer.setStyle({ opacity: .0001 });
        this.numberDisplay.hide();

        var imgPreloader = new Image();

        // once image is preloaded, resize image container


        imgPreloader.onload = (function() {
            this.lightboxImage.src = this.imageArray[this.activeImage][0];
            this.lightboxImage.alt = this.imageArray[this.activeImage][1];
            this.resizeImageContainer(imgPreloader.width, imgPreloader.height);
        }).bind(this);
        imgPreloader.src = this.imageArray[this.activeImage][0];
    },

    //
    //  resizeImageContainer()
    //
    resizeImageContainer: function(imgWidth, imgHeight) {

        // get current width and height
        var widthCurrent = this.outerImageContainer.getWidth();
        var heightCurrent = this.outerImageContainer.getHeight();

        // get new width and height
        var widthNew = (imgWidth + LightboxOptions.borderSize * 2);
        var heightNew = (imgHeight + LightboxOptions.borderSize * 2);

        // scalars based on change from old to new
        var xScale = (widthNew / widthCurrent) * 100;
        var yScale = (heightNew / heightCurrent) * 100;

        // calculate size difference between new and old image, and resize if necessary
        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 });

        // if new and old image are same size and no scaling transition is necessary, 
        // do a quick pause to prevent image flicker.
        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()
    //  Display image and begin preloading neighbors.
    //
    showImage: function() {
        this.loading.hide();
        new Effect.Appear(this.lightboxImage, {
            duration: this.resizeDuration,
            queue: 'end',
            afterFinish: (function() { this.updateDetails(); }).bind(this)
        });
        this.preloadNeighborImages();
    },

    //
    //  updateDetails()
    //  Display caption, image number, and bottom nav.
    //
    updateDetails: function() {

        // if caption is not null
        if (this.imageArray[this.activeImage][1] != "") {
            this.caption.update(this.imageArray[this.activeImage][1]).show();
        }

        // if image is part of set display 'Image x of x' 
        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() {
                    // update overlay size and update nav
                    var arrayPageSize = this.getPageSize();
                    this.overlay.setStyle({ height: arrayPageSize[1] + 'px' });
                    this.updateNav();
                }).bind(this)
            }
        );
    },

    //
    //  updateNav()
    //  Display appropriate previous and next hover navigation.
    //
    updateNav: function() {

        this.hoverNav.show();

        // if not first image in set, display prev image button
        if (this.activeImage > 0) this.prevLink.show();

        // if not last image in set, display next image button
        if (this.activeImage < (this.imageArray.length - 1)) this.nextLink.show();

        this.enableKeyboardNav();
    },

    //
    //  enableKeyboardNav()
    //
    enableKeyboardNav: function() {
        document.observe('keydown', this.keyboardAction);
    },

    //
    //  disableKeyboardNav()
    //
    disableKeyboardNav: function() {
        document.stopObserving('keydown', this.keyboardAction);
    },

    //
    //  keyboardAction()
    //
    keyboardAction: function(event) {
        var keycode = event.keyCode;

        var escapeKey;
        if (event.DOM_VK_ESCAPE) {  // mozilla
            escapeKey = event.DOM_VK_ESCAPE;
        } else { // ie
            escapeKey = 27;
        }

        var key = String.fromCharCode(keycode).toLowerCase();

        if (key.match(/x|o|c/) || (keycode == escapeKey)) { // close lightbox
            this.end();
        } else if ((key == 'p') || (keycode == 37)) { // display previous image
            if (this.activeImage != 0) {
                this.disableKeyboardNav();
                this.changeImage(this.activeImage - 1);
            }
        } else if ((key == 's') || (keycode == 44)) { // display next image
            if (this.activeImage != (this.imageArray.length - 1)) {
                this.disableKeyboardNav();
                this.changeImage(this.activeImage + 1);
            }
        }
    },

    //
    //  preloadNeighborImages()
    //  Preload previous and next images.
    //
    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()
    //
    end: function() {
        this.disableKeyboardNav();
        this.lightbox.hide();
        this.youtube.hide();
        new Effect.Fade(this.overlay, { duration: this.overlayDuration });
        $$('select', 'object', 'embed').each(function(node) { node.style.visibility = 'visible' });
    },

    //
    //  getPageSize()
    //
    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) { // all but Explorer Mac
            xScroll = document.body.scrollWidth;
            yScroll = document.body.scrollHeight;
        } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
            xScroll = document.body.offsetWidth;
            yScroll = document.body.offsetHeight;
        }

        var windowWidth, windowHeight;

        if (self.innerHeight) {	// all except Explorer
            if (document.documentElement.clientWidth) {
                windowWidth = document.documentElement.clientWidth;
            } else {
                windowWidth = self.innerWidth;
            }
            windowHeight = self.innerHeight;
        } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
            windowWidth = document.documentElement.clientWidth;
            windowHeight = document.documentElement.clientHeight;
        } else if (document.body) { // other Explorers
            windowWidth = document.body.clientWidth;
            windowHeight = document.body.clientHeight;
        }

        // for small pages with total height less then height of the viewport
        if (yScroll < windowHeight) {
            pageHeight = windowHeight;
        } else {
            pageHeight = yScroll;
        }

        // for small pages with total width less then width of the viewport
        if (xScroll < windowWidth) {
            pageWidth = xScroll;
        } else {
            pageWidth = windowWidth;
        }

        return [pageWidth, pageHeight];
    }
}

document.observe('dom:loaded', function() { new Lightbox(); });