package password

import (
	"errors"
	"unicode/utf8"
)

const (
	minPasswordCodePoints = 15
	maxPasswordBytes      = 1024
)

var (
	ErrTooShort = errors.New("password: shorter than 15 characters")
	ErrTooLong  = errors.New("password: longer than 1024 bytes")
)

func Acceptable(password string) error {
	if len(password) > maxPasswordBytes {
		return ErrTooLong
	}
	if utf8.RuneCountInString(password) < minPasswordCodePoints {
		return ErrTooShort
	}
	return nil
}