Zaraz Commerce Order Completed Event for WooCommerce

function checkout_datalayer($order_id) {
    // Get the order
    $order = wc_get_order($order_id);
    // Get products from order
    $products = $order->get_items();
  ?>
    <script >
      zaraz.ecommerce('Order Completed', {
        'order_id':    '<?php echo $order->get_order_number(); ?>',
        'affiliation': 'Website',
        'total':       '<?php echo number_format($order->get_total(), 2, ".", ""); ?>',
        'revenue':     '<?php echo number_format($order->get_subtotal(), 2, ".", ""); ?>',
        'shipping':    '<?php echo number_format($order->calculate_shipping(), 2, ".", ""); ?>',
        'tax':         '<?php echo number_format($order->get_total_tax(), 2, ".", ""); ?>',
        <?php if($order->get_coupon_codes()): ?>
          'coupon':    '<?php echo $order->get_coupon_codes(); ?>,'
        <?php endif; ?>
        <?php if($order->get_total_discount()): ?>
          'discount':  '<?php echo implode("-", $order->get_total_discount()); ?>',
        <?php endif; ?>
        'currency':    '<?php echo $order->get_order_currency(); ?>',
        'products': [
          <?php
            foreach($order->get_items() as $key => $item):
              $product = $order->get_product_from_item( $item );
              $variant_name = ($item['variation_id']) ? wc_get_product($item['variation_id']) : '';
          ?>
            {
              'product_id': '<?php echo $item['product_id']; ?>',
              'name':       '<?php echo $item['name']; ?>',
              'price':      '<?php echo number_format($order->get_line_subtotal($item), 2, ".", ""); ?>',
              'quantity':   '<?php echo $item['qty']; ?>',
              'category':   '<?php echo strip_tags($product->get_categories(", ", "", "")); ?>',
            },
          <?php endforeach; ?>
        ]
      });
    </script>
  <?php
}
add_action('woocommerce_thankyou', 'checkout_datalayer');