add_action( 'woocommerce_checkout_order_processed', 'aw_sync_order', 10, 3 );
add_action( 'aw_push_to_erp', 'aw_push_to_erp_handler' );

function aw_sync_order( int $order_id, array $data, WC_Order $order ): void {
    foreach ( $order->get_items() as $item ) {
        $product = $item->get_product();

        if ( ! $product || ! $product->managing_stock() ) {
            continue;
        }

        wc_update_product_stock(
            $product,
            $item->get_quantity(),
            'decrease'
        );
    }

    as_enqueue_async_action( 'aw_push_to_erp', [ $order_id ] );
}

function aw_push_to_erp_handler( int $order_id ): void {
    $order = wc_get_order( $order_id );

    if ( ! $order instanceof WC_Order ) {
        return;
    }

    $response = wp_remote_post( AW_ERP_ENDPOINT, [
        'timeout' => 15,
        'headers' => [
            'Content-Type'  => 'application/json',
            'Authorization' => 'Bearer ' . aw_erp_token(),
        ],
        'body'    => wp_json_encode( [
            'reference' => $order->get_order_number(),
            'total'     => $order->get_total(),
            'currency'  => $order->get_currency(),
            'lines'     => aw_map_line_items( $order ),
        ] ),
    ] );

    // Throwing hands the retry back to Action Scheduler.
    if ( is_wp_error( $response ) ) {
        $order->add_order_note( 'ERP sync failed, queued for retry.' );

        throw new Exception( $response->get_error_message() );
    }

    $order->update_meta_data( '_aw_erp_synced_at', time() );
    $order->save();
}