return "$classes is-fullscreen-mode";
			}
		);

		$block_editor_context   = new \WP_Block_Editor_Context( array( 'name' => 'core/edit-site' ) );
		$indexed_template_types = array();
		foreach ( get_default_block_template_types() as $slug => $template_type ) {
			$template_type['slug']    = (string) $slug;
			$indexed_template_types[] = $template_type;
		}

		$custom_settings = array(
			'siteUrl'                   => site_url(),
			'postsPerPage'              => get_option( 'posts_per_page' ),
			'styles'                    => get_block_editor_theme_styles(),
			'defaultTemplateTypes'      => $indexed_template_types,
			'defaultTemplatePartAreas'  => get_allowed_block_template_part_areas(),
			'supportsLayout'            => wp_theme_has_theme_json(),
			'supportsTemplatePartsMode' => ! wp_is_block_theme() && current_theme_supports( 'block-template-parts' ),
		);

		// Add additional back-compat patterns registered by `current_screen` et al.
		$custom_settings['__experimentalAdditionalBlockPatterns']          = \WP_Block_Patterns_Registry::get_instance()->get_all_registered( true );
		$custom_settings['__experimentalAdditionalBlockPatternCategories'] = \WP_Block_Pattern_Categories_Registry::get_instance()->get_all_registered( true );

		$editor_settings         = get_block_editor_settings( $custom_settings, $block_editor_context );
		$active_global_styles_id = \WP_Theme_JSON_Resolver::get_user_global_styles_post_id();
		$active_theme            = get_stylesheet();
		$preload_paths           = array(
			array( '/wp/v2/media', 'OPTIONS' ),
			'/wp/v2/types?context=view',
			'/wp/v2/types/wp_template?context=edit',
			'/wp/v2/types/wp_template-part?context=edit',
			'/wp/v2/templates?context=edit&per_page=-1',
			'/wp/v2/template-parts?context=edit&per_page=-1',
			'/wp/v2/themes?context=edit&status=active',
			'/wp/v2/global-styles/' . $active_global_styles_id . '?context=edit',
			'/wp/v2/global-styles/' . $active_global_styles_id,
			'/wp/v2/global-styles/themes/' . $active_theme,
		);

		block_editor_rest_api_preload( $preload_paths, $block_editor_context );

		wp_add_inline_script(
			'wp-blocks',
			sprintf(
				'window.wcBlockSettings = %s;',
				wp_json_encode( $editor_settings )
			)
		);

		// Preload server-registered block schemas.
		wp_add_inline_script(
			'wp-blocks',
			'wp.blocks.unstable__bootstrapServerSideBlockDefinitions(' . wp_json_encode( get_block_editor_server_block_settings() ) . ');'
		);

		wp_add_inline_script(
			'wp-blocks',
			sprintf( 'wp.blocks.setCategories( %s );', wp_json_encode( isset( $editor_settings['blockCategories'] ) ? $editor_settings['blockCategories'] : array() ) ),
			'after'
		);

		wp_enqueue_script( 'wp-editor' );
		wp_enqueue_script( 'wp-format-library' ); // Not sure if this is needed.
		wp_enqueue_script( 'wp-router' );
		wp_enqueue_style( 'wp-editor' );
		wp_enqueue_style( 'wp-edit-site' );
		wp_enqueue_style( 'wp-format-library' );
		wp_enqueue_media();

		if (
				current_theme_supports( 'wp-block-styles' ) &&
				( ! is_array( $editor_styles ) || count( $editor_styles ) === 0 )
			) {
			wp_enqueue_style( 'wp-block-library-theme' );
		}
		/** This action is documented in wp-admin/edit-form-blocks.php
		 *
		 * @since 8.0.3
		*/
		do_action( 'enqueue_block_editor_assets' );
	}

	/**
	 * Appends a small style to hide admin bar
	 *
	 * @param bool $show Whether to show the admin bar.
	 */
	public function possibly_hide_wp_admin_bar( $show ) {
		if ( isset( $_GET['cys-hide-admin-bar'] ) ) { // @phpcs:ignore
			return false;
		}
		return $show;
	}

	/**
	 * Runs script and add styles to remove unwanted elements and hide scrollbar
	 * when users are viewing with ?cys-hide-admin-bar=true.
	 *
	 * @return void
	 */
	public function possibly_remove_unwanted_ui_elements() {
		if ( isset( $_GET['cys-hide-admin-bar'] ) ) { // @phpcs:ignore
			echo '
			<style type="text/css">
				body { overflow: hidden; }
			</style>';
		}
	}

	/**
	 * Checks if the post has custom global styles stored (if it is different from the default global styles).
	 *
	 * @param WP_Post $post The post object.
	 * @return bool
	 */
	private function has_custom_global_styles( WP_Post $post ) {
		$required_keys = array( 'version', 'isGlobalStylesUserThemeJSON' );

		$json_post_content = json_decode( $post->post_content, true );
		if ( is_null( $json_post_content ) ) {
			return false;
		}

		$post_content_keys = array_keys( $json_post_content );

		return ! empty( array_diff( $post_content_keys, $required_keys ) ) || ! empty( array_diff( $required_keys, $post_content_keys ) );
	}

	/**
	 * Checks if the post is a template or a template part.
	 *
	 * @param WP_Post $post The post object.
	 * @return bool Whether the post is a template or a template part.
	 */
	private function has_custom_template( WP_Post $post ) {
		return in_array( $post->post_type, array( 'wp_template', 'wp_template_part' ), true );
	}
}