package administration

import (
	"crypto/rand"
	"encoding/hex"
	"golang.org/x/crypto/scrypt"
	"regexp"
	"strings"
)

var phonePattern = regexp.MustCompile(`^\+?[0-9]{6,20}$`)

func NormalizePhone(value string) string {
	r := strings.NewReplacer(" ", "", "\t", "", "\n", "", "\r", "", "(", "", ")", "", "-", "")
	return r.Replace(strings.TrimSpace(value))
}
func ValidPhone(value string) bool { return phonePattern.MatchString(NormalizePhone(value)) }
func HashPassword(password string) (PasswordHash, error) {
	salt := make([]byte, 16)
	if _, err := rand.Read(salt); err != nil {
		return PasswordHash{}, err
	}
	encoded := hex.EncodeToString(salt)
	derived, err := scrypt.Key([]byte(password), []byte(encoded), 16384, 8, 1, 64)
	if err != nil {
		return PasswordHash{}, err
	}
	return PasswordHash{Hash: hex.EncodeToString(derived), Salt: encoded}, nil
}