/* eslint consistent-this: [ "error", "control" ] */

wp.mediaWidgets = ( function( $ ) {

	'use strict';

	var component = {};

	/**

	 * Widget control (view) constructors, mapping widget id_base to subclass of MediaWidgetControl.

	 *

	 * Media widgets register themselves by assigning subclasses of MediaWidgetControl onto this object by widget ID base.

	 *

	 * @type {Object.<string, wp.mediaWidgets.MediaWidgetModel>}

	 */

	component.controlConstructors = {};

	/**

	 * Widget model constructors, mapping widget id_base to subclass of MediaWidgetModel.

	 *

	 * Media widgets register themselves by assigning subclasses of MediaWidgetControl onto this object by widget ID base.

	 *

	 * @type {Object.<string, wp.mediaWidgets.MediaWidgetModel>}

	 */

	component.modelConstructors = {};

		/**

		 *

		 * @param {Object} options - Options.

		 * @returns {void}

		 */

		initialize: function initialize( options ) {

			_.bindAll( this, 'handleDisplaySettingChange' );

			wp.media.controller.Library.prototype.initialize.call( this, options );

		},

		/**

		 * Sync changes to the current display settings back into the current customized.

		 *

		 * @param {Backbone.Model} displaySettings - Modified display settings.

		 * @returns {void}

		 */

		handleDisplaySettingChange: function handleDisplaySettingChange( displaySettings ) {

			this.get( 'selectedDisplaySettings' ).set( displaySettings.attributes );

		},

		/**

		 * Get the display settings model.

		 *

		 * Model returned is updated with the current customized display settings,

		 * and an event listener is added so that changes made to the settings

		 * will sync back into the model storing the session's customized display

		 * settings.

		 *

		 * @param {Backbone.Model} model - Display settings model.

		 * @returns {Backbone.Model} Display settings model.

		 */

		display: function getDisplaySettingsModel( model ) {

			var display, selectedDisplaySettings = this.get( 'selectedDisplaySettings' );

			display = wp.media.controller.Library.prototype.display.call( this, model );

			display.off( 'change', this.handleDisplaySettingChange ); // Prevent duplicated event handlers.

			display.set( selectedDisplaySettings.attributes );

			if ( 'custom' === selectedDisplaySettings.get( 'link_type' ) ) {

				display.linkUrl = selectedDisplaySettings.get( 'link_url' );

			}

			display.on( 'change', this.handleDisplaySettingChange );

			return display;

		}

	});

	/**

	 * Extended view for managing the embed UI.

	 *

	 */

		/**

		 * Initialize.

		 *

		 * @since 4.9.0

		 *

		 * @param {object} options - Options.

		 * @returns {void}

		 */

		initialize: function( options ) {

			var view = this, embedController; // eslint-disable-line consistent-this

			wp.media.view.Embed.prototype.initialize.call( view, options );

			if ( 'image' !== view.controller.options.mimeType ) {

				embedController = view.controller.states.get( 'embed' );

				embedController.off( 'scan', embedController.scanImage, embedController );

			}

		},

		/**

		 * Refresh embed view.

		 *

		 * Forked override of {wp.media.view.Embed#refresh()} to suppress irrelevant "link text" field.

		 *

		 * @returns {void}

		 */

		refresh: function refresh() {

			var Constructor;

			if ( 'image' === this.controller.options.mimeType ) {

				Constructor = wp.media.view.EmbedImage;

			} else {

				// This should be eliminated once #40450 lands of when this is merged into core.

					/**

					 * Set the disabled state on the Add to Widget button.

					 *

					 * @param {boolean} disabled - Disabled.

					 * @returns {void}

					 */

					setAddToWidgetButtonDisabled: function setAddToWidgetButtonDisabled( disabled ) {

						this.views.parent.views.parent.views.get( '.media-frame-toolbar' )[0].$el.find( '.media-button-select' ).prop( 'disabled', disabled );

					},

					/**

					 * Set or clear an error notice.

					 *

					 * @param {string} notice - Notice.

					 * @returns {void}

					 */

					setErrorNotice: function setErrorNotice( notice ) {

						var embedLinkView = this, noticeContainer; // eslint-disable-line consistent-this

						noticeContainer = embedLinkView.views.parent.$el.find( '> .notice:first-child' );

						if ( ! notice ) {

							if ( noticeContainer.length ) {

								noticeContainer.slideUp( 'fast' );

							}

						} else {

							if ( ! noticeContainer.length ) {

								noticeContainer = $( '<div class="media-widget-embed-notice notice notice-error notice-alt"></div>' );

								noticeContainer.hide();

								embedLinkView.views.parent.$el.prepend( noticeContainer );

							}

							noticeContainer.empty();

							noticeContainer.append( $( '<p>', {

								html: notice

							}));

							noticeContainer.slideDown( 'fast' );

						}

					},

					/**

					 * Update oEmbed.

					 *

					 * @since 4.9.0

					 *

					 * @returns {void}

					 */

					updateoEmbed: function() {

						var embedLinkView = this, url; // eslint-disable-line consistent-this

						url = embedLinkView.model.get( 'url' );

						// Abort if the URL field was emptied out.

						if ( ! url ) {

							embedLinkView.setErrorNotice( '' );

							embedLinkView.setAddToWidgetButtonDisabled( true );

							return;

						}

						if ( ! url.match( /^(http|https):\/\/.+\// ) ) {

							embedLinkView.controller.$el.find( '#embed-url-field' ).addClass( 'invalid' );

							embedLinkView.setAddToWidgetButtonDisabled( true );

						}

						wp.media.view.EmbedLink.prototype.updateoEmbed.call( embedLinkView );

					},

					/**

					 * Fetch media.

					 *

					 * @returns {void}

					 */

					fetch: function() {

						var embedLinkView = this, fetchSuccess, matches, fileExt, urlParser, url, re, youTubeEmbedMatch; // eslint-disable-line consistent-this

						url = embedLinkView.model.get( 'url' );

						if ( embedLinkView.dfd && 'pending' === embedLinkView.dfd.state() ) {

							embedLinkView.dfd.abort();

						}

						fetchSuccess = function( response ) {

							embedLinkView.renderoEmbed({

								data: {

									body: response

								}

							});

							embedLinkView.controller.$el.find( '#embed-url-field' ).removeClass( 'invalid' );

							embedLinkView.setErrorNotice( '' );

							embedLinkView.setAddToWidgetButtonDisabled( false );

						};

						urlParser = document.createElement( 'a' );

						urlParser.href = url;

						matches = urlParser.pathname.toLowerCase().match( /\.(\w+)$/ );

						if ( matches ) {

							fileExt = matches[1];

							if ( ! wp.media.view.settings.embedMimes[ fileExt ] ) {

								embedLinkView.renderFail();

							} else if ( 0 !== wp.media.view.settings.embedMimes[ fileExt ].indexOf( embedLinkView.controller.options.mimeType ) ) {

								embedLinkView.renderFail();

							} else {

								fetchSuccess( '<!--success-->' );

							}

							return;

						}

						// Support YouTube embed links.

						re = /https?:\/\/www\.youtube\.com\/embed\/([^/]+)/;

						youTubeEmbedMatch = re.exec( url );

						if ( youTubeEmbedMatch ) {

							url = 'https://www.youtube.com/watch?v=' + youTubeEmbedMatch[ 1 ];

							// silently change url to proper oembed-able version.

							embedLinkView.model.attributes.url = url;

						}

						embedLinkView.dfd = wp.apiRequest({

							url: wp.media.view.settings.oEmbedProxyUrl,

							data: {

								url: url,

								maxwidth: embedLinkView.model.get( 'width' ),

								maxheight: embedLinkView.model.get( 'height' ),

								discover: false

							},

							type: 'GET',

							dataType: 'json',

							context: embedLinkView

						});

						embedLinkView.dfd.done( function( response ) {

							if ( embedLinkView.controller.options.mimeType !== response.type ) {

								embedLinkView.renderFail();

								return;

							}

							fetchSuccess( response.html );

						});

						embedLinkView.dfd.fail( _.bind( embedLinkView.renderFail, embedLinkView ) );

					},

					/**

					 * Handle render failure.

					 *

					 * Overrides the {EmbedLink#renderFail()} method to prevent showing the "Link Text" field.

					 * The element is getting display:none in the stylesheet, but the underlying method uses

					 * uses {jQuery.fn.show()} which adds an inline style. This avoids the need for !important.

					 *

					 * @returns {void}

					 */

					renderFail: function renderFail() {

						var embedLinkView = this; // eslint-disable-line consistent-this

						embedLinkView.controller.$el.find( '#embed-url-field' ).addClass( 'invalid' );

						embedLinkView.setErrorNotice( embedLinkView.controller.options.invalidEmbedTypeError || 'ERROR' );

						embedLinkView.setAddToWidgetButtonDisabled( true );

					}

				});

			}

			this.settings( new Constructor({

				controller: this.controller,

				model:      this.model.props,

				priority:   40

			}));

		}

	});

	/**

	 * Custom media frame for selecting uploaded media or providing media by URL.

	 *

	 */

		/**

		 * Create the default states.

		 *

		 * @returns {void}

		 */

		createStates: function createStates() {

			var mime = this.options.mimeType, specificMimes = [];

			_.each( wp.media.view.settings.embedMimes, function( embedMime ) {

				if ( 0 === embedMime.indexOf( mime ) ) {

					specificMimes.push( embedMime );

				}

			});

			if ( specificMimes.length > 0 ) {

				mime = specificMimes;

			}

			this.states.add([

				// Main states.

				new component.PersistentDisplaySettingsLibrary({

					id:         'insert',

					title:      this.options.title,

					selection:  this.options.selection,

					priority:   20,

					toolbar:    'main-insert',

					filterable: 'dates',

					library:    wp.media.query({

						type: mime

					}),

					multiple:   false,

					editable:   true,

					selectedDisplaySettings: this.options.selectedDisplaySettings,

					displaySettings: _.isUndefined( this.options.showDisplaySettings ) ? true : this.options.showDisplaySettings,

					displayUserSettings: false // We use the display settings from the current/default widget instance props.

				}),

				new wp.media.controller.EditImage({ model: this.options.editImage }),

				// Embed states.

				new wp.media.controller.Embed({

					metadata: this.options.metadata,

					type: 'image' === this.options.mimeType ? 'image' : 'link',

					invalidEmbedTypeError: this.options.invalidEmbedTypeError

				})

			]);

		},

		/**

		 * Main insert toolbar.

		 *

		 * Forked override of {wp.media.view.MediaFrame.Post#mainInsertToolbar()} to override text.

		 *

		 * @param {wp.Backbone.View} view - Toolbar view.

		 * @this {wp.media.controller.Library}

		 * @returns {void}

		 */

		mainInsertToolbar: function mainInsertToolbar( view ) {

			var controller = this; // eslint-disable-line consistent-this

			view.set( 'insert', {

				style:    'primary',

				priority: 80,

				text:     controller.options.text, // The whole reason for the fork.

				requires: { selection: true },

				/**

				 * Handle click.

				 *

				 * @fires wp.media.controller.State#insert()

				 * @returns {void}

				 */

				click: function onClick() {

					var state = controller.state(),

						selection = state.get( 'selection' );