package hostbox

import (
	"crypto/sha256"
	"encoding/hex"
	"encoding/json"
	"github.com/carlosframework/platform/internal/hostwrite"
)

// LaunchSpec is a digest preimage, never authority. Root compares its digest
// with the authoritative attempt and hashes the executable independently.
type LaunchSpec struct {
	Identity           hostwrite.Identity
	Executable, Digest string
	Args, Env          []string
}

func (s LaunchSpec) Hash() (string, error) {
	raw, err := json.Marshal(s)
	if err != nil {
		return "", err
	}
	sum := sha256.Sum256(raw)
	return hex.EncodeToString(sum[:]), nil
}