/* global _wpmejsSettings, mejsL10n */

(function( window, $ ) {

	window.wp = window.wp || {};

	function wpMediaElement() {

		var settings = {};

		/**

		 * Initialize media elements.

		 *

		 * Ensures media elements that have already been initialized won't be

		 * processed again.

		 *

		 * @memberOf wp.mediaelement

		 *

		 * @since 4.4.0

		 *

		 * @return {void}

		 */

		function initialize() {

			var selectors = [];

			if ( typeof _wpmejsSettings !== 'undefined' ) {

				settings = $.extend( true, {}, _wpmejsSettings );

			}

			settings.classPrefix = 'mejs-';

			settings.success = settings.success || function ( mejs ) {

				var autoplay, loop;

				if ( mejs.rendererName && -1 !== mejs.rendererName.indexOf( 'flash' ) ) {

					autoplay = mejs.attributes.autoplay && 'false' !== mejs.attributes.autoplay;

					loop = mejs.attributes.loop && 'false' !== mejs.attributes.loop;

					if ( autoplay ) {

						mejs.addEventListener( 'canplay', function() {

							mejs.play();

						}, false );

					}

					if ( loop ) {

						mejs.addEventListener( 'ended', function() {

							mejs.play();

						}, false );

					}

				}

			};

			/**

			 * Custom error handler.

			 *

			 * Sets up a custom error handler in case a video render fails, and provides a download

			 * link as the fallback.

			 *

			 * @since 4.9.3

			 *

			 * @param {object} media The wrapper that mimics all the native events/properties/methods for all renderers.

			 * @param {object} node  The original HTML video, audio, or iframe tag where the media was loaded.

			 * @return {string}

			 */

			settings.customError = function ( media, node ) {

				// Make sure we only fall back to a download link for flash files.

				if ( -1 !== media.rendererName.indexOf( 'flash' ) || -1 !== media.rendererName.indexOf( 'flv' ) ) {

					return '<a href="' + node.src + '">' + mejsL10n.strings['mejs.download-file'] + '</a>';

				}

			};

			if ( 'undefined' === typeof settings.videoShortcodeLibrary || 'mediaelement' === settings.videoShortcodeLibrary ) {

				selectors.push( '.wp-video-shortcode' );

			}

			if ( 'undefined' === typeof settings.audioShortcodeLibrary || 'mediaelement' === settings.audioShortcodeLibrary ) {

				selectors.push( '.wp-audio-shortcode' );

			}

			if ( ! selectors.length ) {

				return;

			}

			// Only initialize new media elements.

			$( selectors.join( ', ' ) )

				.not( '.mejs-container' )

				.filter(function () {

					return ! $( this ).parent().hasClass( 'mejs-mediaelement' );

				})

				.mediaelementplayer( settings );

		}

		return {

			initialize: initialize

		};

	}

	/**

	 * @namespace wp.mediaelement

	 * @memberOf wp

	 */

	window.wp.mediaelement = new wpMediaElement();

	$( window.wp.mediaelement.initialize );

})( window, jQuery );