define([
    'base/js/ui/UiUtils',
    'ui/js/api/Notification'
], function (
        UiUtils,
        Notification
        ) {

    'use strict';

    /**
     * Application UI support.
     *
     * @AbcsAPI stable
     * @version 15.4.5
     *
     * @exports api/js/UI
     */
    var UI = function () {
        AbcsLib.throwStaticClassError();
    };

    /**
     * Shows a notification.
     *
     * @AbcsAPI stable
     * @version 15.4.5
     * @param {ui/js/api/Notification} notification notification to display to user
     * @returns {module:api/js/UI.Closeable}
     *
     * @example
     * <caption>Creates and shows simple INFO level message in the UI</caption>
     * //create and show a simple INFO message
     * UI.showNotification(UI.Notification.create({
     *      message: 'I\'m informing you ...'
     * });
     * @example
     * <caption>Creates and shows Notification message. Once it's shown it's closed from the code.</caption>
     * //create and show a message
     * var notification = UI.Notification.create({
     *      message: 'Ahoy',
     *      level: UI.Notification.Level.SUCCESS
     * });
     * var closeHandler = UI.showNotification(notification);
     * //explicitly close it later
     * closeHandler.close();
     */
    UI.showNotification = function (notification) {
        var message = notification.getMessage();
        switch (notification.getLevel()) {
            case Notification.Level.SUCCESS:
                return UiUtils.showSuccessNote(message);
            case Notification.Level.INFO:
                return UiUtils.showInfoNote(message);
            case Notification.Level.WARNING:
                return UiUtils.showWarningNote(message);
            case Notification.Level.ERROR:
                return UiUtils.showErrorNote(message);
            default:
                Logger.get('api/js/UI').info('Unknown notification level: ' + notification.getLevel());
        }
    };

    /**
     * Notifications module.
     *
     * @AbcsAPI stable
     * @version 15.4.5
     * @type {ui/js/api/Notification}
     */
    UI.Notification = Notification;

    /**
     * API object allowing client to perform particular operation.
     *
     * <p>
     * Object providing method which can close the opened notification. This object
     * is obtained after showing Notification, see {@link module:api/js/UI.showNotification UI.showNotification}
     * for details.
     * </p>
     *
     * @AbcsAPI stable
     * @memberof module:api/js/UI
     * @objectLiteral
     *
     *
     * @see {@link module:api/js/UI UI}
     * @see {@link module:api/js/UI.showNotification UI.showNotification}
     */
    var Closeable = function() {
    };

    /**
     * Close the notification message.
     *
     * @AbcsAPI stable
     * @version 15.4.5
     */
    Closeable.close = function() {
    };

    return UI;

});