'number_data',
				'notes',
				'exists',
			), $document );

			$document_meta   = array_map( function ( $data_key ) use ( $document ) {
				return "_wcpdf_{$document->slug}_{$data_key}";
			}, $document_data_keys );
			$document_meta[] = "_wcpdf_formatted_{$document->slug}_number"; // legacy meta key
			$documents_meta  = array_merge( $documents_meta, $document_meta );
		}

		foreach ( $meta as $key => $value ) {
			// The old deprecated hook (`wcs_renewal_order_meta`) sends $meta with this data structure: array(... , array( "meta_key":"_wcpdf_invoice_number","meta_value":"158" ), ...)
			// The new hook (`wc_subscriptions_renewal_order_data`) sends $meta with this data structure: array(... ,"_wcpdf_invoice_number":"158", ...)
			$meta_key = is_array( $value ) ? ( $value['meta_key'] ?? null ) : $key;
			if ( in_array( $meta_key, $documents_meta, true ) ) {
				unset( $meta[ $key ] );
			}
		}

		return $meta;
	}

	/**
	 * WooCommerce Product Bundles
	 * @param string $classes       CSS classes for item row (tr) 
	 * @param string $document_type PDF Document type
	 * @param object $order         WC_Order order
	 * @param int    $item_id       WooCommerce Item ID
	 */
	public function add_product_bundles_classes ( $classes, $document_type, $order, $item_id = 0 ) {
		if ( !class_exists('WC_Bundles') ) {
			return $classes;
		}

		$item_id = ! empty( $item_id ) ? $item_id : $this->get_item_id_from_classes( $classes );
		if ( empty( $item_id ) ) {
			return $classes;
		}

		if ( $bundled_by = wc_get_order_item_meta( $item_id, '_bundled_by', true ) ) {
			$classes = $classes . ' bundled-item';

			// check bundled item visibility
			if ( $hidden = wc_get_order_item_meta( $item_id, '_bundled_item_hidden', true ) ) {
				$classes = $classes . ' hidden';
			}

			return $classes;
		} elseif ( $bundled_items = wc_get_order_item_meta( $item_id, '_bundled_items', true ) ) {
			return  $classes . ' product-bundle';
		}

		return $classes;
	}

	/**
	 * WPC Product Bundles
	 * @param string $classes       CSS classes for item row (tr) 
	 * @param string $document_type PDF Document type
	 * @param object $order         WC_Order order
	 * @param int    $item_id       WooCommerce Item ID
	 */
	public function add_wpc_product_bundles_classes ( $classes, $document_type, $order, $item_id = 0 ) {
		if ( ! class_exists( 'WPCleverWoosb' ) ) {
			return $classes;
		}

		$item_id = ! empty( $item_id ) ? $item_id : $this->get_item_id_from_classes( $classes );
		if ( empty( $item_id ) ) {
			return $classes;
		}

		// Add row classes
		$refunded_item_id = wc_get_order_item_meta( $item_id, '_refunded_item_id', true );
		$class_item_id = ! empty( $refunded_item_id ) ? $refunded_item_id : $item_id;

		if ( $bundled_by = wc_get_order_item_meta( $class_item_id, '_woosb_parent_id', true ) ) {
			$classes = $classes . ' bundled-item';
		} elseif ( $bundled_items = wc_get_order_item_meta( $class_item_id, '_woosb_ids', true ) ) {
			$classes = $classes . ' product-bundle';
		}

		return $classes;
	}	

	/**
	 * WooCommerce Chained Products
	 * @param string $classes       CSS classes for item row (tr) 
	 * @param string $document_type PDF Document type
	 * @param object $order         WC_Order order
	 * @param int    $item_id       WooCommerce Item ID
	 */
	public function add_chained_product_class ( $classes, $document_type, $order, $item_id = 0 ) {
		if ( !class_exists('SA_WC_Chained_Products') && !class_exists('WC_Chained_Products') ) {
			return $classes;
		}

		$item_id = !empty($item_id) ? $item_id : $this->get_item_id_from_classes( $classes );
		if ( empty($item_id) ) {
			return $classes;
		}

		if ( $chained_product_of = wc_get_order_item_meta( $item_id, '_chained_product_of', true ) ) {
			return  $classes . ' chained-product';
		}

		return $classes;
	}

	/**
	 * WooCommerce Composite Products
	 * @param string $classes       CSS classes for item row (tr) 
	 * @param string $document_type PDF Document type
	 * @param object $order         WC_Order order
	 * @param int    $item_id       WooCommerce Item ID
	 */
	public function add_composite_product_class ( $classes, $document_type, $order, $item_id = 0 ) {
		if ( !function_exists('wc_cp_is_composited_order_item') || !function_exists('wc_cp_is_composite_container_order_item') ) {
			return $classes;
		}

		$item_id = !empty($item_id) ? $item_id : $this->get_item_id_from_classes( $classes );
		if ( empty($item_id) ) {
			return $classes;
		}

		// get order item object
		$order_items = $order->get_items();
		foreach ($order_items as $order_item_id => $order_item) {
			if ($order_item_id == $item_id) {
				if ( wc_cp_is_composited_order_item( $order_item, $order ) ) {
					$classes .= ' component_table_item';
				} elseif ( wc_cp_is_composite_container_order_item( $order_item ) ) {
					$classes .= ' component_container_table_item';
				}
				break;
			}
		}

		return $classes;
	}

	/**
	 * Backwards compatibility helper function: try to get item ID from row class
	 * @param string $classes       CSS classes for item row (tr) 
	 */
	public function get_item_id_from_classes ( $classes ) {
		$class_array = explode(' ', $classes);
		foreach ($class_array as $class) {
			if (is_numeric($class)) {
				$item_id = $class;
				break;
			}
		}

		// if still empty, we lost the item id somewhere :(
		if (empty($item_id)) {
			return false;
		} else {
			return $item_id;
		}
	}

	/**
	 * WooCommerce Order Status & Actions Manager emails compatibility
	 */
	public function wc_order_status_actions_emails ( $emails ) {
		// get list of custom statuses from WooCommerce Custom Order Status & Actions
		// status slug => status name
		$custom_statuses = \WC_Custom_Status::get_status_list_names();
		// append _email to slug (=email_id) and add to emails list
		foreach ($custom_statuses as $status_slug => $status_name) {
			$emails[$status_slug.'_email'] = $status_name;
		}
		return $emails;
	}


	/**
	 * Aelia Currency Switcher compatibility
	 * Applies decimal & Thousand separator settings
	 */
	function aelia_currency_formatting( $document_type, $document ) {
		add_filter( 'wc_price_args', array( $this, 'aelia_currency_price_args' ), 10, 1 );
	}

	function aelia_currency_price_args( $args ) {
		if ( !empty( $args['currency'] ) && class_exists("\\Aelia\\WC\\CurrencySwitcher\\WC_Aelia_CurrencySwitcher") ) {
			$cs_settings = \Aelia\WC\CurrencySwitcher\WC_Aelia_CurrencySwitcher::settings();
			$args['decimal_separator'] = $cs_settings->get_currency_decimal_separator( $args['currency'] );
			$args['thousand_separator'] = $cs_settings->get_currency_thousand_separator( $args['currency'] );
		}
		return $args;
	}

	/**
	 * Avoid double images from German Market: remove filter
	 */
	function remove_wgm_thumbnails( $document_type, $document ) {
		remove_filter( 'woocommerce_order_item_name', array( 'WGM_Product', 'add_thumbnail_to_order' ), 100, 3 );
	}

	/**
	 * Restore above
	 */
	function restore_wgm_thumbnails( $document_type, $document ) {
		if ( is_callable( array( 'WGM_Product', 'add_thumbnail_to_order' ) ) && get_option( 'german_market_product_images_in_order', 'off' ) == 'on' ) {
			add_filter( 'woocommerce_order_item_name', array( 'WGM_Product', 'add_thumbnail_to_order' ), 100, 3 );
		}
	}
}


endif; // Class exists check