<?php

if (! defined('WP_DEBUG')) {
	die( 'Direct access forbidden.' );
}

add_action( 'wp_enqueue_scripts', function () {
	wp_enqueue_style( 'parent-style', get_template_directory_uri() . '/style.css' );
});


// 添加A网站商品到购物车
function add_product_to_cart_from_query() {
    // Check if we are on the checkout page, and not in the admin area
    if (!is_admin() && is_page('checkout')) {
        
        // Check if the required query parameters are set
        if (isset($_GET['product_id']) && isset($_GET['quantity']) && isset($_GET['order_id'])) {
            $product_id = intval($_GET['product_id']);
            $quantity = intval($_GET['quantity']);
            $external_order_id = intval($_GET['order_id']); // 获取外部订单ID
            
            // Retrieve the cart object
            $cart = WC()->cart;

            // 清空现有购物车内容
            $cart->empty_cart();

            // Retrieve the product to validate if it exists and can be purchased
            $product = wc_get_product($product_id);
            if ($product && $quantity > 0) {
                
                // Check if the product can be added to the cart, considering stock status, etc.
                $cart = WC()->cart;
                $exists = $cart->find_product_in_cart($cart->generate_cart_id($product_id));

                if (!$exists) {
                    // Add the product to the cart
                    $cart->add_to_cart($product_id, $quantity);
                } else {
                    // Increment the quantity if the product already exists in the cart
                    $cart_item_key = $cart->generate_cart_id($product_id);
                    if (isset($cart->cart_contents[$cart_item_key])) {
                        $cart->set_quantity($cart_item_key, $cart->cart_contents[$cart_item_key]['quantity'] + $quantity);
                    }
                }

                // Store the external order ID in session or transient for later use
                WC()->session->set('external_order_id', $external_order_id);

                // Optionally redirect to prevent duplicate additions on page refresh
                wp_safe_redirect(esc_url(remove_query_arg(array('product_id', 'quantity', 'order_id'))));
                exit;
            }
        }
    }
}

add_action('wp', 'add_product_to_cart_from_query');