package serial

import (
	"crypto/rand"
	"encoding/base32"
	"fmt"
)

// New appends a 26-character base32 value with 128 random bits to prefix.
func New(prefix string) (string, error) {
	var entropy [16]byte
	if _, err := rand.Read(entropy[:]); err != nil {
		return "", fmt.Errorf("generate serial number: %w", err)
	}
	return prefix + base32.StdEncoding.WithPadding(base32.NoPadding).EncodeToString(entropy[:]), nil
}