<?php

/**
 * Stamps the Afileasy referral onto orders at checkout.
 */

namespace Afileasy\WooCommerce;

if (! defined('ABSPATH')) {
    exit;
}

/**
 * The tracking script stores the referral (an Afileasy EventLink uuid) in the
 * `afileasy_ref` cookie. Reading it server-side at order creation works uniformly
 * for both classic and block (Store API) checkout, with no theme/JS changes.
 */
class Attribution
{
    public const ORDER_META_KEY = 'afileasy_event_id';

    private const COOKIE = 'afileasy_ref';

    public function register(): void
    {
        // Classic checkout.
        add_action('woocommerce_checkout_create_order', [$this, 'stamp'], 10, 1);
        // Block / Store API checkout.
        add_action('woocommerce_store_api_checkout_update_order_from_request', [$this, 'stamp'], 10, 1);
    }

    /**
     * @param  \WC_Order  $order
     */
    public function stamp($order): void
    {
        if (! $order instanceof \WC_Order) {
            return;
        }

        // Don't overwrite a referral already attached to the order.
        if ($order->get_meta(self::ORDER_META_KEY)) {
            return;
        }

        $ref = isset($_COOKIE[self::COOKIE]) ? sanitize_text_field(wp_unslash($_COOKIE[self::COOKIE])) : '';

        if ($ref === '') {
            return;
        }

        $order->update_meta_data(self::ORDER_META_KEY, $ref);
    }
}