* carry the test mode metadata directly.
	 *
	 * @param \WC_Abstract_Order $order Order object.
	 * @return bool
	 *
	 * @since 10.7.0
	 */
	public static function is_test_order( $order ) {
		if ( ! $order instanceof \WC_Abstract_Order ) {
			return false;
		}

		// For refunds, check the parent order.
		$check_order = $order;
		if ( 'shop_order_refund' === $order->get_type() ) {
			$check_order = wc_get_order( $order->get_parent_id() );
			if ( ! $check_order instanceof \WC_Abstract_Order ) {
				return false;
			}
		}

		$is_test = 'test' === $check_order->get_meta( '_wcpay_mode' );

		/**
		 * Filter whether an order is a test order excluded from analytics.
		 *
		 * Use this filter to customize test order detection beyond the default
		 * WCPay test mode check, e.g., to exclude orders from other payment
		 * gateways' test/sandbox modes.
		 *
		 * @param bool               $is_test Whether the order is a test order.
		 * @param \WC_Abstract_Order $order   The order being checked (for refunds, this is the parent order).
		 *
		 * @since 10.7.0
		 */
		return apply_filters( 'woocommerce_analytics_is_test_order', $is_test, $check_order );
	}

	/**
	 * Get the recorded failed order imports.
	 *
	 * @internal
	 * @since 11.0.0
	 * @return array Array with 'ids' (int[]) and 'overflow' (int) keys.
	 */
	public static function get_failed_order_imports(): array {
		$value = get_option( self::FAILED_ORDER_IMPORTS_OPTION, array() );
		if ( ! is_array( $value ) ) {
			$value = array();
		}

		return array(
			'ids'      => isset( $value['ids'] ) && is_array( $value['ids'] ) ? array_map( 'absint', $value['ids'] ) : array(),
			'overflow' => isset( $value['overflow'] ) ? absint( $value['overflow'] ) : 0,
		);
	}

	/**
	 * Record an order ID that failed analytics import.
	 *
	 * Deduplicates IDs. When the list exceeds FAILED_ORDER_IMPORTS_CAP, the
	 * oldest ID is dropped and the overflow counter is incremented.
	 *
	 * @internal
	 * @since 11.0.0
	 * @param int $order_id Order or refund ID that failed to import.
	 * @return void
	 */
	public static function record_failed_order_import( $order_id ): void {
		$order_id = absint( $order_id );
		if ( ! $order_id ) {
			return;
		}

		$failed = self::get_failed_order_imports();
		if ( in_array( $order_id, $failed['ids'], true ) ) {
			return;
		}

		$failed['ids'][] = $order_id;
		$ids_count       = count( $failed['ids'] );
		while ( $ids_count > self::FAILED_ORDER_IMPORTS_CAP ) {
			array_shift( $failed['ids'] );
			++$failed['overflow'];
			--$ids_count;
		}

		update_option( self::FAILED_ORDER_IMPORTS_OPTION, $failed, false );
	}

	/**
	 * Remove an order ID from the failed imports list.
	 *
	 * Called after a successful import so the list always reflects orders
	 * that have not been imported since their last failure.
	 *
	 * @internal
	 * @since 11.0.0
	 * @param int $order_id Order or refund ID to remove.
	 * @return void
	 */
	public static function clear_failed_order_import( $order_id ): void {
		$order_id = absint( $order_id );
		if ( ! $order_id ) {
			return;
		}

		$failed = self::get_failed_order_imports();
		$index  = array_search( $order_id, $failed['ids'], true );

		if ( false === $index ) {
			return;
		}

		unset( $failed['ids'][ $index ] );
		$failed['ids'] = array_values( $failed['ids'] );

		if ( empty( $failed['ids'] ) && 0 === $failed['overflow'] ) {
			delete_option( self::FAILED_ORDER_IMPORTS_OPTION );
			return;
		}

		update_option( self::FAILED_ORDER_IMPORTS_OPTION, $failed, false );
	}

	/**
	 * Reset the failed order imports overflow counter.
	 *
	 * Called when a full (non-windowed) historical import starts, since that
	 * import covers the orders whose IDs were dropped from the list. Windowed
	 * imports must not reset the counter.
	 *
	 * @internal
	 * @since 11.0.0
	 * @return void
	 */
	public static function reset_failed_order_imports_overflow(): void {
		$failed = self::get_failed_order_imports();
		if ( 0 === $failed['overflow'] ) {
			return;
		}

		$failed['overflow'] = 0;
		if ( empty( $failed['ids'] ) ) {
			delete_option( self::FAILED_ORDER_IMPORTS_OPTION );
			return;
		}

		update_option( self::FAILED_ORDER_IMPORTS_OPTION, $failed, false );
	}

	/**
	 * Delete a batch of orders.
	 *
	 * @internal
	 * @param int $batch_size Number of items to delete.
	 * @return void
	 */
	public static function delete( $batch_size ) {
		global $wpdb;

		$order_ids = $wpdb->get_col(
			$wpdb->prepare(
				"SELECT order_id FROM {$wpdb->prefix}wc_order_stats ORDER BY order_id ASC LIMIT %d",
				$batch_size
			)
		);

		foreach ( $order_ids as $order_id ) {
			OrdersStatsDataStore::delete_order( $order_id );
		}
	}

	/**
	 * Check whether scheduled import is enabled.
	 *
	 * Checks the scheduled import option value.
	 *
	 * @internal
	 * @since 10.5.0 Introduced as a private method.
	 * @since 11.0.0 Made public.
	 * @return bool
	 */
	public static function is_scheduled_import_enabled(): bool {
		$value = get_option( self::SCHEDULED_IMPORT_OPTION, false );

		if ( false !== $value ) {
			return 'yes' === $value;
		}

		// Fall back to the legacy option (pre-10.5.0) which used inverted semantics:
		// 'yes' meant immediate import (= not scheduled), 'no' meant scheduled.
		$legacy_value = get_option( self::LEGACY_IMMEDIATE_IMPORT_OPTION, false );

		if ( false !== $legacy_value ) {
			return 'no' === $legacy_value;
		}

		// Neither option exists — use the default (not scheduled).
		return false;
	}
}