package update

import (
	"crypto/sha256"
	"encoding/hex"
	"path"
)

const (
	RestartRequestFileName = "update-restart-request.json"
	ResultFileName         = "update-result.json"
	HelperStatusFileName   = "update-helper.json"
	RunningInfoFileName    = "update-running.json"
	UpdatesDirName         = "updates"
	HelperStatusVersion    = 1

	PathUnitName    = "renewcms-update.path"
	ServiceUnitName = "renewcms-update.service"
	DefaultService  = "renewcms"
	DefaultPort     = "8080"

	PreviousSuffix     = ".previous"
	PreviousTempSuffix = ".previous.tmp"
	InstallTempSuffix  = ".new"
	RestoreTempSuffix  = ".restore"
	ResultTempSuffix   = ".tmp"
	ExecutableMode     = 0o755
	PrivateFileMode    = 0o600
)

type HelperLayout struct {
	DataDir    string
	BinaryPath string
}

func (l HelperLayout) UpdatesDir() string {
	return path.Join(l.DataDir, UpdatesDirName)
}

func (l HelperLayout) StagedDir(tag string) string {
	return path.Join(l.UpdatesDir(), tag)
}

func (l HelperLayout) ResultPath() string {
	return path.Join(l.DataDir, ResultFileName)
}

func (l HelperLayout) ResultTempPath() string {
	return l.ResultPath() + ResultTempSuffix
}

func (l HelperLayout) RestartRequestPath() string {
	return path.Join(l.DataDir, RestartRequestFileName)
}

func (l HelperLayout) PreviousPath() string {
	return l.BinaryPath + PreviousSuffix
}

func SHA256Hex(content []byte) string {
	sum := sha256.Sum256(content)
	return hex.EncodeToString(sum[:])
}