foreach ($preparedProducts['create'] as $key => $product) {
    $idProduct = $this->createProduct($product, $brand);
}

private function createProduct($product, $brand)
{
    global $wpdb;
    $item = [
        'post_title' => $product['name'],
        'post_status' => 'publish',
        'post_type' => 'product'
    ];
    $postId = wp_insert_post($item);

    $meta_keys = [];
    $meta_keys['_visibility'] = 'visible';
    $meta_keys['_stock_status'] = 'instock';
    $meta_keys['wholesale_customer_wholesale_price'] = $product['wholesale_price'];
    $meta_keys['wholesale_customer_have_wholesale_price'] = $product['have_wholesale_price'];
    $meta_keys['_price'] = $product['price'];
    $meta_keys['_regular_price'] = $product['price'];
    $meta_keys['_weight'] = $product['weight'];
    $meta_keys['_sku'] = $product['sku'];
    $meta_keys['_stock'] = $product['stock_quantity'];
    $meta_keys['_manage_stock'] = 'yes';
    $meta_keys['_id_ds'] = $product['id_ds'];
    $meta_keys['_ean'] = $product['ean'];
    //$meta_keys['_product_attributes'] = maybe_serialize(wp_unslash($product['attributes']));;

    /* SET Attributes */
    $meta_keys['_product_attributes'] = maybe_serialize(wp_unslash($this->createAttributes($postId, $product['attributes'])));
    /* SET Attributes */

    $custom_fields = [];
    $place_holders = [];
    $query_string = "INSERT INTO $wpdb->postmeta (post_id, meta_key, meta_value) VALUES ";
    foreach($meta_keys as $key => $value) {
        array_push($custom_fields, $postId, $key, $value);
        $place_holders[] = "('%d', '%s', '%s')";
    }
    $query_string .= implode(', ', $place_holders);
    $wpdb->query($wpdb->prepare("$query_string ", $custom_fields));

    $this->generateFeaturedImage($product['image'], $postId);

    wp_set_object_terms( $postId, 'simple', 'product_type' );
    wp_set_object_terms($postId, get_term_by('name', $brand->name,'product_cat')->term_id, 'product_cat');

    //update_post_meta($postId, '_product_attributes', $product['attributes']);
    return $postId;
}

private function generateFeaturedImage($imageUrl, $postId, $isCategory = false)
    {
        $imageUrl   = $this->escapefileUrl($imageUrl);
        $uploadDir  = wp_upload_dir();
        $filename   = str_replace("%20", "-", basename($imageUrl));

        if(wp_mkdir_p($uploadDir['path'])) {
            $file = $uploadDir['path'] . '/' . $filename;
        } else {
            $file = $uploadDir['basedir'] . '/' . $filename;
        }
        file_put_contents($file, file_get_contents($imageUrl));

        $fileType = wp_check_filetype($filename, null );
        $attachment = array(
            'post_mime_type' => $fileType['type'],
            'post_title' => sanitize_file_name($filename),
            'post_content' => '',
            'post_status' => 'inherit'
        );
        $attachId = wp_insert_attachment( $attachment, $file, $postId );
        require_once(ABSPATH . 'wp-admin/includes/image.php');
        $attachData = wp_generate_attachment_metadata( $attachId, $file );
        wp_update_attachment_metadata( $attachId, $attachData );

        if ($isCategory == false ) {
            set_post_thumbnail( $postId, $attachId );
        }
        else {
            update_term_meta($postId, 'thumbnail_id', $attachId);
        }
    }