Creación programática de un nuevo orden en Woocommerce

Bien, puede hacer esto sin la función wc_create_order.

            $order_data                        = array();
            $order_data[ 'post_type' ]         = 'shop_order';
            $order_data[ 'post_status' ]       = 'wc-' . apply_filters( 'woocommerce_default_order_status', 'pending' );
            $order_data[ 'ping_status' ]       = 'closed';
            $order_data[ 'post_author' ]       = 1;
            $order_data[ 'post_password' ]     = uniqid( 'order_' );
            $order_data[ 'post_title' ]        = sprintf( __( 'Order – %s', 'woocommerce' ), strftime( _x( '%b %d, %Y @ %I:%M %p', 'Order date parsed by strftime', 'woocommerce' ), strtotime( $post_date ) ) );
            $order_data[ 'post_parent' ]       = 12; // parent post id
            $order_data[ 'post_content' ]      = "";
            $order_data[ 'comment_status' ]    = "open";
            $order_data[ 'post_name' ]         = sanitize_title( sprintf( __( 'Order – %s', 'woocommerce' ), strftime( _x( '%b %d, %Y @ %I:%M %p', 'Order date parsed by strftime', 'woocommerce' ), strtotime( $post_date) ) ) );

            $order_id = wp_insert_post( apply_filters( 'woocommerce_new_order_data', $order_data ), true );

Entonces puedes usar este or order_id para agregar otros detalles, como...

$order = wc_get_order( $order_id );
$product_item_id = $order->add_product( wc_get_product( $product_id ));
wc_add_order_item_meta($product_item_id,"meta_key","meta_values");
$addressShipping = array(
       'first_name' => $shippingName,
       'email'      => $user_email_id,
       'phone'      => $billingPhone,
       'address_1'  => $shippingAddress,
       'address_2'  => $shippingAddress2,
       'city'       => $shippingCity,
       'state'      => $shippingStateCode,
       'postcode'   => $shippingZip,
       'country'    => 'US');
$order->set_address( $addressShipping, 'shipping' );
    $addressBilling = array(
       'first_name' => $billingName,
       'email'      => $user_email_id,
       'phone'      => $billingPhone,
       'address_1'  => $billingAddress,
       'address_2'  => $billingAddress2,
       'city'       => $billingCity,
       'state'      => $billingStateCode,
       'postcode'   => $billingZip,
       'country'    => 'US');
$order->set_address( $addressBilling, 'billing' );
$order->calculate_totals();

En realidad no pude resolver su problema, pero proporcionándole otra alternativa, esto podría ayudarlo.

Primero he agregado productos en $woocommerce->cart y luego asigné los datos del carrito a un nuevo pedido creado de esta manera:

/ / Para el producto simple

$woocommerce->cart->add_to_cart($product_id, $quantity);

/ / Para el producto variable

    $woocommerce->cart->add_to_cart($product_id, $quantity, $variationID, $attr_array);

    $order_data = array(
         'status' => apply_filters('woocommerce_default_order_status', 'processing'),
         'customer_id' => $user_id
    );
    $new_order = wc_create_order($order_data);
    foreach ($woocommerce->cart->get_cart() as $cart_item_key => $values) {
            $item_id = $new_order->add_product(
                    $values['data'], $values['quantity'], array(
                'variation' => $values['variation'],
                'totals' => array(
                    'subtotal' => $values['line_subtotal'],
                    'subtotal_tax' => $values['line_subtotal_tax'],
                    'total' => $values['line_total'],
                    'tax' => $values['line_tax'],
                    'tax_data' => $values['line_tax_data'] // Since 2.2
                )
                    )
            );
        }
    $new_order->set_address($address, 'billing');
    $new_order->set_address($address, 'shipping');

Casi lo tienes, add_action( 'woocommerce_init', 'create_vip_order' ); woocommerce_init es demasiado pronto, necesita cambiar su gancho a al menos init, sus errores

[19-Apr-2016 21:16:38 UTC] PHP Fatal error:  Uncaught Error: Call to a member function add_product() on boolean in /Users/joe/Sites/speedsociety-2/wp-content/themes/ss/lib/contests/order.php:107
Stack trace:
#0 /Users/joe/Sites/speedsociety-2/wp-includes/plugin.php(525): create_vip_order('')
#1 /Users/joe/Sites/speedsociety-2/wp-content/plugins/woocommerce/woocommerce.php(330): do_action('woocommerce_ini...')
#2 /Users/joe/Sites/speedsociety-2/wp-includes/plugin.php(525): WooCommerce->init('')
#3 /Users/joe/Sites/speedsociety-2/wp-settings.php(392): do_action('init')
#4 /Users/joe/Sites/speedsociety-2/wp-config.php(67): require_once('/Users/joe/Site...')
#5 /Users/joe/Sites/speedsociety-2/wp-load.php(37): require_once('/Users/joe/Site...')
#6 /Users/joe/Sites/speedsociety-2/wp-admin/admin.php(31): require_once('/Users/joe/Site...')
#7 /Users/joe/Sites/speedsociety-2/wp-admin/edit.php(10): require_once('/Users/joe/Site...')
#8 {main}
  thrown in /Users/joe/Sites/speedsociety-2/wp-content/themes/ss/lib/contests/order.php on line 107

Muestra que está sucediendo que la variable order order ha sido devuelta false y por lo tanto no puedes usar $order->add_product

Aquí está mi código de trabajo

function create_vip_order() {

  global $woocommerce;

  $address = array(
      'first_name' => '111Joe',
      'last_name'  => 'Conlin',
      'company'    => 'Speed Society',
      'email'      => '[email protected]',
      'phone'      => '760-555-1212',
      'address_1'  => '123 Main st.',
      'address_2'  => '104',
      'city'       => 'San Diego',
      'state'      => 'Ca',
      'postcode'   => '92121',
      'country'    => 'US'
  );

  // Now we create the order
  $order = wc_create_order();

  // The add_product() function below is located in /plugins/woocommerce/includes/abstracts/abstract_wc_order.php
  $order->add_product( get_product( '129' ), 1 ); // This is an existing SIMPLE product
  $order->set_address( $address, 'billing' );
  //
  $order->calculate_totals();
  $order->update_status("Completed", 'Imported order', TRUE);

}

add_action( 'init', 'create_vip_order' );

Buena suerte y feliz codificación: D