package hostops

import (
	"context"
	"crypto/ed25519"
	"errors"
	"os"

	"github.com/carlosframework/platform/internal/release"
)

func CheckCreateFreeze(ctx context.Context, s release.Store, pub ed25519.PublicKey) error {
	raw, _, err := s.Get(ctx, BackfillKey)
	if errors.Is(err, os.ErrNotExist) {
		return nil
	}
	if err != nil {
		return err
	}
	var plan BackfillPlan
	if release.VerifyRootEnvelope(pub, raw, &plan) != nil || plan.V != 1 || plan.ID == "" {
		return ErrIdentity
	}
	if plan.Phase != "done" {
		return ErrPending
	}
	return nil
}