Redirect an Empty Checkout Page in WooCommerce

function redirect_on_empty_cart_after_item_remove() {
    ?>
    <script type="text/javascript">
        jQuery(function($){
            $(document.body).on('click', '.remove', function(e){
                e.preventDefault();

                // Wait for WooCommerce to process the cart item removal
                setTimeout(function(){
                    // Check if the cart is empty
                    $.get(wc_add_to_cart_params.ajax_url, {
                        action: 'check_cart_empty'
                    }, function(is_empty) {
                        if (is_empty === '1') { // If the cart is empty
                            // Redirect to a page with suggested products
                            var redirectUrl = "<?php echo esc_url(get_permalink(get_option('woocommerce_shop_page_id'))); ?>"; // Customize this URL

                            // Example to fetch related or featured products (Optional)
                            $.get(wc_add_to_cart_params.ajax_url, {
                                action: 'get_related_products'
                            }, function(data) {
                                if (data) {
                                    redirectUrl = data; // Redirect to the related product
                                }
                                window.location.href = redirectUrl; // Perform the redirection
                            });
                        }
                    });
                }, 500); // Delay to ensure the cart is updated
            });
        });
    </script>
    <?php
}
add_action('wp_footer', 'redirect_on_empty_cart_after_item_remove');

// Function to check if the cart is empty after an item is removed
function check_cart_empty() {
    echo WC()->cart->is_empty() ? '1' : '0'; // Return 1 if cart is empty, 0 if not
    wp_die();
}
add_action('wp_ajax_check_cart_empty', 'check_cart_empty');
add_action('wp_ajax_nopriv_check_cart_empty', 'check_cart_empty');

// Function to get related products (optional, you can adjust this)
function get_related_products() {
    // Get the first product in the cart
    $cart_items = WC()->cart->get_cart();
    
    if (!empty($cart_items)) {
        $first_cart_item = reset($cart_items);
        $product_id = $first_cart_item['product_id'];
        
        // Fetch related products (default WooCommerce behavior)
        $related_products = wc_get_related_products($product_id, 1); // Adjust number of products here
        
        if (!empty($related_products)) {
            $related_product_id = $related_products[0];
            $related_product_url = get_permalink($related_product_id);
            
            echo $related_product_url; // Send back the related product URL
        }
    }
    wp_die();
}
add_action('wp_ajax_get_related_products', 'get_related_products');
add_action('wp_ajax_nopriv_get_related_products', 'get_related_products');