wc_add_notice add to wordpress theme function

hello I have some code that is working and I'd like to add a warning when the code is triggered Thanks

here is code that need warning adding to it


add_filter( 'woocommerce_package_rates', 'hide_shipping_method_based_on_shipping_class', 10, 2 );
function hide_shipping_method_based_on_shipping_class( $rates, $package ) {
$categories = array('tv-series'); // Defined targeted product categories
$allowed_max_qty = 1; // Max allowed quantity for the shipping class
$shipping_rates_ids = array( // Shipping Method rates Ids To Hide
'flat_rate:3'
);

$related_total_qty = 0;

// Checking cart items for current package
foreach( $package['contents'] as $key => $cart_item ) {
if ( has_term( $categories, 'product_cat', $cart_item['product_id'] ) ) {
$related_total_qty += $cart_item['quantity'];
}
}

// When total allowed quantity is more than allowed (for items from defined shipping classes)
if ( $related_total_qty > $allowed_max_qty ) {
// Hide related defined shipping methods
foreach( $shipping_rates_ids as $shipping_rate_id ) {
if( isset($rates[$shipping_rate_id]) ) {
unset($rates[$shipping_rate_id]); // Remove Targeted Methods

}
}
}
return $rates;


}