package xkeypairs

import (
	"strconv"

	"git.rootprojects.org/root/keypairs"
)

// ParsePEMPrivateKey will parse a PEM Private Key (or JWK or DER) but in future versions will fail to parse other key input types
func ParsePEMPrivateKey(block []byte) (keypairs.PrivateKey, error) {
	// TODO do not parse DER or JWK
	return keypairs.ParsePrivateKey(block)
}

func ParseDuration(exp string) (int, error) {
	if "" == exp {
		exp = "15m"
	}

	mult := 1
	switch exp[len(exp)-1] {
	case 'w':
		mult *= 7
		fallthrough
	case 'd':
		mult *= 24
		fallthrough
	case 'h':
		mult *= 60
		fallthrough
	case 'm':
		mult *= 60
		fallthrough
	case 's':
		// no fallthrough
	default:
		// could be 'k' or 'z', but we assume its empty
		exp += "s"
	}

	// 15m => num=15, mult=1*60
	num, err := strconv.Atoi(exp[:len(exp)-1])
	if nil != err {
		return 0, err
	}

	return num * mult, nil
}