Get different email for Sample Product order

Hi, I want to send different email for sample product order. Can you give me any tips to do this?

I am trying to add a function on this hook woocommerce_order_status_pending_to_processing_notification
and get meta value using wc_get_order_item_meta function. Please take a look inside my code and give any suggestion.

Thanks

add_action( 'woocommerce_order_status_pending_to_processing_notification', 'trigger',10,2 );

function trigger( $order_id, $post ) {
	// bail if no order ID is present
	if ( ! $order_id )
		return;
	// setup order object

	$to = "[email protected]";

	$order_details = new WC_Order($order_id);
	$OrderId = $order_details->id;

	$items = $order_details->get_items(); 
	$order_item_count = count($items);
	
	
	$print_result .= "Total Items: $order_item_count ,";

	foreach ( $items as $item ) {

if ( function_exists( 'woocommerce_get_order_item_meta' ) ) { 
    $item_id = $item['product_id']; // <= Here is your product ID

		$result = wc_get_order_item_meta($item_id, "product type", true); 

		
		$res =  $data[0]['meta_value'];
		if($res == null){
			$print_result .= "<br/>data[0][meta_value] is null";
		}else{
			$print_result .= "<br/>data[0][meta_value] is not null";
			$print_result .= "<br/>data[0][meta_value]: $res";
		}
		

		$status = wp_mail($to, "Order Details", $print_result);
		$status = wp_mail($to, "Order Details", "message working");
}
 
		

	}
	
	
	
	
}