YUI.add('aui-image-viewer', function (A, NAME) {

/**
 * The ImageViewer Utility
 *
 * @module aui-image-viewer
 */

var CSS_CAPTION = A.getClassName('image', 'viewer', 'caption'),
    CSS_CLOSE = A.getClassName('image', 'viewer', 'close'),
    CSS_CONTROL = A.getClassName('image', 'viewer', 'base', 'control'),
    CSS_CONTROL_LEFT = A.getClassName('image', 'viewer', 'base', 'control', 'left'),
    CSS_CONTROL_RIGHT = A.getClassName('image', 'viewer', 'base', 'control', 'right'),
    CSS_FOOTER_BUTTONS = A.getClassName('image', 'viewer', 'footer', 'buttons'),
    CSS_FOOTER_CONTENT = A.getClassName('image', 'viewer', 'footer', 'content'),
    CSS_INFO = A.getClassName('image', 'viewer', 'info'),
    CSS_MASK = A.getClassName('image', 'viewer', 'mask'),
    CSS_THUMBNAILS = A.getClassName('image', 'viewer', 'thumbnails');

/**
 * A class for `A.ImageViewer`, providing:
 *
 * - Widget Lifecycle (initializer, renderUI, bindUI, syncUI, destructor)
 * - Displays an image in a Overlay
 * - Keyboard navigation support
 *
 * Check the [live demo](http://alloyui.com/examples/image-viewer/).
 *
 * @class A.ImageViewer
 * @extends A.ImageViewerBase
 * @uses A.ImageViewerSlideshow, A.WidgetCssClass, WidgetStdMod, A.WidgetToggle,
 *   WidgetPosition, WidgetStack, WidgetPositionAlign, WidgetPositionConstrain,
 *   WidgetModality
 * @param {Object} config Object literal specifying widget configuration
 *     properties.
 * @constructor
 */

A.ImageViewer = A.Base.create(
    'image-viewer',
    A.ImageViewerBase, [
        A.ImageViewerSlideshow,
        A.WidgetCssClass,
        A.WidgetStdMod,
        A.WidgetToggle,
        A.WidgetPosition,
        A.WidgetStack,
        A.WidgetPositionAlign,
        A.WidgetPositionConstrain,
        A.WidgetModality
    ], {
        TPL_CAPTION: '<span class="h4 ' + CSS_CAPTION + '"></span>',
        TPL_CLOSE: '<button class="close ' + CSS_CONTROL + ' ' + CSS_CLOSE + '" type="button">' +
            '<span class="glyphicon glyphicon-remove"></span></button>',
        TPL_CONTROL_LEFT: '<a href="#" class="carousel-control left ' +
            CSS_CONTROL + ' ' + CSS_CONTROL_LEFT +
            '"><span class="glyphicon glyphicon-chevron-left"><span class="sr-only">Previous Image</span></span></a>',
        TPL_CONTROL_RIGHT: '<a href="#" class="carousel-control right ' +
            CSS_CONTROL + ' ' + CSS_CONTROL_RIGHT +
            '"><span class="glyphicon glyphicon-chevron-right"><span class="sr-only">Next Image</span></span></a>',
        TPL_FOOTER_BUTTONS: '<span class="' + CSS_FOOTER_BUTTONS + '"></span>',
        TPL_FOOTER_CONTENT: '<div class="' + CSS_FOOTER_CONTENT + '"></div>',
        TPL_INFO: '<span class="h5 ' + CSS_INFO + '"></span>',
        TPL_PLAYER: '<span><span class="glyphicon glyphicon-play"></span></span>',
        TPL_THUMBNAILS: '<div class="' + CSS_THUMBNAILS + '"></div>',

        /**
         * Create the DOM structure for the `A.ImageViewer`. Lifecycle.
         *
         * @method renderUI
         * @protected
         */
        renderUI: function() {
            A.ImageViewer.superclass.renderUI.apply(this, arguments);

            this._renderFooter();
        },

        /**
         * Bind the events for the `A.ImageViewer` UI. Lifecycle.
         *
         * @method bindUI
         * @protected
         */
        bindUI: function() {
            A.ImageViewer.superclass.bindUI.apply(this, arguments);

            this._attachLinkEvent();

            this._eventHandles.push(
                this.after({
                    linksChange: this._afterLinksChange,
                    thumbnailsConfigChange: this._afterThumbnailsConfigChange
                }),
                this._closeEl.after('click', A.bind(this._afterCloseClicked, this)),
                this.on('keydown', A.bind(this._onKeydown, this)),
                A.after(this._afterFillHeight, this, 'fillHeight')
            );

            this._bindThumbnails();
        },

        /**
         * Destructor lifecycle implementation for the `A.ImageViewer` class.
         *
         * @method destructor
         * @protected
         */
        destructor: function() {
            this._detachLinkEvent();

            this.get('controlPrevious').remove(true);
            this.get('controlNext').remove(true);
            this._closeEl.remove(true);

            this.get('maskNode').removeClass(CSS_MASK);

            if (this._thumbnailsWidget) {
                this._thumbnailsWidget.destroy();
            }
        },

        /**
         * Gets the `Node` reference to the `index` element from the
         * [links](A.ImageViewer.html#attr_links).
         *
         * @method getLink
         * @param index
         * @return {Node}
         */
        getLink: function(index) {
            return this.get('links').item(index);
        },

        /**
         * Fired after the close button is clicked.
         *
         * @method _afterCloseClicked
         * @protected
         */
        _afterCloseClicked: function() {
            this.hide();
        },

        /**
         * Fired after `fillHeight` function is called. Updates the line-height
         * of the fillHeight node to be equal to its height, so the images can
         * be vertically centered.
         *
         * @method _afterFillHeight
         * @protected
         */
        _afterFillHeight: function() {
            var fillHeightNode = this.getStdModNode(this.get('fillHeight'));

            fillHeightNode.setStyle('lineHeight', fillHeightNode.getStyle('height'));
        },

        /**
         * Fired after the `link` attribute is changed. It will render the
         * referenced images and attach click events to those links.
         *
         * @method _attachLinkEvents
         * @protected
         */
        _afterLinksChange: function() {
            this._attachLinkEvent();
        },

        /**
         * Fired after the `responsive` event.
         *
         * @method _afterResponsive
         * @protected
         */
        _afterResponsive: function() {
            A.ImageViewer.superclass._afterResponsive.apply(this, arguments);

            this.footerNode.setStyle('width', '');

            this.bodyNode.setStyles({
                height: '',
                lineHeight: ''
            });
            this._fillHeight();

            this._setAlignCenter(true);
        },

        /**
         * Fired after the `thumbnailsConfig` attribute changes.
         *
         * @method _afterThumbnailsConfigChange
         * @param {EventFacade} event
         * @protected
         */
        _afterThumbnailsConfigChange: function(event) {
            if (event.newVal === false) {
                this._thumbnailsEl.hide();
            }
            else if (event.prevVal === false) {
                if (this._thumbnailsWidget) {
                    this._thumbnailsEl.show();
                }
                else {
                    this._renderThumbnailsWidget();
                    this._bindThumbnails();
                }
            }
            else {
                this._thumbnailsWidget.setAttrs(this.get('thumbnailsConfig'));
            }
        },

        /**
         * Fired after the current thumbnail index changes.
         *
         * @method _afterThumbnailsIndexChange
         * @protected
         */
        _afterThumbnailsIndexChange: function() {
            this.set('currentIndex', this._thumbnailsWidget.get('currentIndex'));
        },

        /**
         * Shows the `A.ImageViewer` UI.
         *
         * @method _afterUISetVisible
         * @protected
         */
        _afterUISetVisible: function() {
            A.ImageViewer.superclass._afterUISetVisible.apply(this, arguments);

            if (this.get('visible')) {
                this._fillHeight();

                if (this._thumbnailsWidget) {
                    this._thumbnailsWidget.updateDimensions();
                }

                this._closeEl.show();
                if (this.get('modal')) {
                    this.get('maskNode').addClass(CSS_MASK);
                }
            }
            else {
                this._closeEl.hide();
                this.get('maskNode').removeClass(CSS_MASK);
            }
        },

        /**
         * Attaches the click event for the image links.
         *
         * @method _attachLinkEvent
         * @protected
         */
        _attachLinkEvent: function() {
            this._detachLinkEvent();

            this._linkEvent = this.get('links').on(
                'click',
                A.bind(this._onClickLinks, this)
            );
        },

        /**
         * Binds the events related to the viewer's controls.
         *
         * @method _bindControls
         * @protected
         */
        _bindControls: function() {
            this._eventHandles.push(
                this.get('controlPrevious').after('click', A.bind(this._onClickControl, this)),
                this.get('controlNext').after('click', A.bind(this._onClickControl, this))
            );
        },

        /**
         * Binds the events related to the thumbnails.
         *
         * @method _bindThumbnails
         * @protected
         */
        _bindThumbnails: function() {
            if (this._thumbnailsWidget) {
                this._eventHandles.push(
                    this._thumbnailsWidget.after('currentIndexChange', A.bind(this._afterThumbnailsIndexChange, this))
                );
            }
        },

        /**
         * Detaches the click event for the image links, if one was attached
         * earlier.
         *
         * @method _detachLinkEvent
         * @protected
         */
        _detachLinkEvent: function() {
            if (this._linkEvent) {
                this._linkEvent.detach();
                this._linkEvent = null;
            }
        },

        /**
         * Gets the [info](A.ImageViewer.html#attr_info) template.
         *
         * @method _getInfoTemplate
         * @param {String} v template
         * @return {String} Parsed string.
         */
        _getInfoTemplate: function(val) {
            return A.Lang.sub(val, {
                current: this.get('currentIndex') + 1,
                total: this.get('links').size()
            });
        },

        /**
         * Gets `thumbnailsConfig` attribute.
         *
         * @method _getThumbnailsConfig
         * @param {Boolean | Object} val
         * @protected
         */
        _getThumbnailsConfig: function(val) {
            if (val === false) {
                return val;
            }

            return A.merge({
                height: 70,
                links: this.get('links'),
                showControls: false,
                sources: this._getThumbnailImageSources(),
                width: '100%'
            }, val);
        },

        /**
         * Returns an array with the sources of the images to be used as the
         * viewer's thumbnails. They should be the images included inside the
         * elements given as the `links` attributes or, if there isn't one,
         * the respective item in the `sources` attribute.
         *
         * @method _getThumbnailImageSources
         * @protected
         */
        _getThumbnailImageSources: function() {
            var image,
                index,
                links = this.get('links'),
                sources = this.get('sources'),
                thumbnailSources = [];

            for (index = 0; index < links.size(); index++) {
                image = links.item(index).one('img');
                if (image) {
                    thumbnailSources.push(image.getAttribute('src'));
                }
                else {
                    thumbnailSources.push(sources[index]);
                }
            }

            return thumbnailSources;
        },

        /**
         * Fired when the nodes in the `links` attribute are clicked.
         *
         * @method _onClickLinks
         * @param {EventFacade} event
         * @protected
         */
        _onClickLinks: function(event) {
            event.preventDefault();

            this.show();
            this.set(
                'currentIndex',
                this.get('links').indexOf(event.currentTarget)
            );
        },

        /**
         * Fired when the user presses a key on the keyboard.
         *
         * @method _onKeydown
         * @param {EventFacade} event
         * @protected
         */
        _onKeydown: function(event) {
            if (!this.get('visible')) {
                return false;
            }

            if (event.domEvent.isKey('LEFT')) {
                this.prev();
            }
            else if (event.domEvent.isKey('RIGHT')) {
                this.next();
            }
            else if (event.domEvent.isKey('ESC')) {
                this.hide();
            }
        },

        /**
         * Fired on the `responsive` event.
         *
         * @method _onResponsive
         * @protected
         */
        _onResponsive: function() {
            A.ImageViewer.superclass._onResponsive.apply(this, arguments);

            this.footerNode.setStyle('width', 0);
        },

        /**
         * Renders the viewer controsl (next/prev/close).
         *
         * @method _renderControls
         * @protected
         */
        _renderControls: function() {
            var body = A.one('body');

            body.append(this.get('controlPrevious'));
            body.append(this.get('controlNext'));

            this._closeEl = A.Node.create(this.TPL_CLOSE);
            body.append(this._closeEl);
        },

        /**
         * Renders the footer of the viewer.
         *
         * @method _renderFooter
         * @protected
         */
        _renderFooter: function() {
            var container = A.Node.create(this.TPL_FOOTER_CONTENT);

            this.setStdModContent('footer', container);

            this._captionEl = A.Node.create(this.TPL_CAPTION);
            this._captionEl.selectable();
            this._captionEl.setStyle('display','block');
            container.append(this._captionEl);

            this._infoEl = A.Node.create(this.TPL_INFO);
            this._infoEl.selectable();
            container.append(this._infoEl);

            container.append(A.Node.create(this.TPL_FOOTER_BUTTONS));

            this._thumbnailsEl = A.Node.create(this.TPL_THUMBNAILS);
            container.append(this._thumbnailsEl);
            this._renderThumbnailsWidget();
        },

        /**
         * Overrides this method from ImageViewerBase so that the image list will
         * be rendered inside the body node, instead of directly in the content box.
         *
         * @method _renderImageListNode
         * @protected
         */
        _renderImageListNode: function() {
            var list = A.Node.create(this.TPL_IMAGE_LIST);
            this.setStdModContent('body', list);

            return list.one('.image-viewer-base-image-list-inner');
        },

        /**
         * Renders the player button.
         *
         * @method _renderPlayer
         * @protected
         */
        _renderPlayer: function() {
            if (this.get('showPlayer') && !this._player) {
                this._player = A.Node.create(this.TPL_PLAYER);
                this.get('contentBox').one('.' + CSS_FOOTER_BUTTONS).append(this._player);
            }
        },

        /**
         * Renders the thumbnails widget.
         *
         * @method _renderThumbnailsWidget
         * @protected
         */
        _renderThumbnailsWidget: function() {
            var thumbnailsConfig = this.get('thumbnailsConfig');

            if (thumbnailsConfig === false) {
                this._thumbnailsEl.hide();
            }
            else {
                this._thumbnailsEl.show();
                this._thumbnailsWidget = new A.ImageViewerMultiple(thumbnailsConfig)
                    .render(this._thumbnailsEl);
            }
        },

        /**
         * Sets `links` attribute.
         *
         * @method _setLinks
         * @param {String | NodeList} val
         * @protected
         */
        _setLinks: function(val) {
            var links,
                sources = [];

            if (val instanceof A.NodeList) {
                links = val;
            }
            else if (A.Lang.isString(val)) {
                links = A.all(val);
            }
            else {
                links = new A.NodeList([val]);
            }

            if (links.size() > 0) {
                links.each(function() {
                    sources.push(this.getAttribute('href'));
                });
                this.set('sources', sources);
            }

            return links;
        },

        /**
         * Loads the image specified at `currentIndex` and shows it.
         *
         * @method _showCurrentImage
         * @protected
         */
        _showCurrentImage: function() {
            A.ImageViewer.superclass._showCurrentImage.apply(this, arguments);

            this._syncCaptionUI();
            this._syncInfoUI();
            this._syncThumbnails();
        },

        /**
         * Updates the caption.
         *
         * @method _syncCaptionUI
         * @protected
         */
        _syncCaptionUI: function() {
            var caption = this.get('caption'),
                link;

            if (this.get('captionFromTitle')) {
                link = this.get('links').item(this.get('currentIndex'));
                caption = link.attr('title') ? link.attr('title') : caption;
            }

            this._captionEl.set('text', caption);
        },

        /**
         * Updates the info node.
         *
         * @method _syncInfoUI
         * @protected
         */
        _syncInfoUI: function() {
            this._infoEl.setHTML(this.get('infoTemplate'));
        },

        /**
         * Updates the thumbnails node.
         *
         * @method _syncThumbnails
         * @protected
         */
        _syncThumbnails: function() {
            if (this._thumbnailsWidget) {
                this._thumbnailsWidget.set('currentIndex', this.get('currentIndex'));
            }
        }
    }, {
        /**
         * Static property used to define the default attribute configuration
         * for the `A.ImageViewer`.
         *
         * @property ATTRS
         * @type {Object}
         * @static
         */
        ATTRS: {
            /**
             * The caption of the displayed image.
             *
             * @attribute caption
             * @default 'blank'
             * @type {String}
             */
            caption: {
                value: 'blank',
                validator: A.Lang.isString
            },

            /**
             * If `true` the [caption](A.ImageViewer.html#attr_caption) will be
             * pulled from the title DOM attribute.
             *
             * @attribute captionFromTitle
             * @default true
             * @type {Boolean}
             */
            captionFromTitle: {
                value: true,
                validator: A.Lang.isBoolean
            },

            /**
             * If `true` the Overlay with the image will be positioned on the
             * center of the viewport.
             *
             * @attribute centered
             * @default true
             * @type {Boolean}
             */
            centered: {
                value: true
            },

            /**
             * The height of the image viewer.
             *
             * @attribute height
             * @default '100%'
             * @type {String | Number}
             */
            height: {
                value: '100%'
            },

            /**
             * String template used to display the information.
             *
             * @attribute infoTemplate
             * @default 'Image {current} of {total}'
             * @type {String}
             */
            infoTemplate: {
                getter: '_getInfoTemplate',
                value: 'Image {current} of {total}',
                validator: A.Lang.isString
            },

            /**
             * Selector or NodeList containing the links where the
             * `A.ImageViewer` extracts the information to generate the
             * thumbnails.
             *
             * @attribute links
             * @type {String | NodeList}
             */
            links: {
                lazyAdd: false,
                setter: '_setLinks'
            },

            /**
             * Displays a mask behind the viewer. Set to `false` to disable.
             *
             * @attribute modal
             * @default true
             * @type {Boolean}
             */
            modal: {
                value: true
            },

            /**
             * Configuration options for the thumbnails widget (ImageViewerMultiple).
             *
             * @attribute thumbnailsConfig
             * @default {}
             * @type {Boolean | Object}
             */
            thumbnailsConfig: {
                getter: '_getThumbnailsConfig',
                value: {}
            },

            /**
             * Determines if the `A.ImageViewer` should be visible or not.
             *
             * @attribute visible
             * @default false
             * @type {Boolean}
             */
            visible: {
                value: false
            },

            /**
             * The width of the image viewer.
             *
             * @attribute width
             * @default '100%'
             * @type {String | Number}
             */
            width: {
                value: '100%'
            }
        },

        /**
         * Static property provides a string to identify the CSS prefix.
         *
         * @property CSS_PREFIX
         * @type {String}
         * @static
         */
        CSS_PREFIX: A.getClassName('image-viewer')
    }
);


}, '3.1.0-deprecated.126', {
    "requires": [
        "widget",
        "widget-modality",
        "widget-position",
        "widget-position-align",
        "widget-position-constrain",
        "widget-stack",
        "widget-stdmod",
        "aui-event",
        "aui-image-viewer-base",
        "aui-image-viewer-multiple",
        "aui-image-viewer-slideshow",
        "aui-node-base",
        "aui-widget-cssclass",
        "aui-widget-toggle"
    ],
    "skinnable": true
});
