package release

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

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

func StageSignedHead(ctx context.Context, s Store, pub ed25519.PublicKey, ratchet *DigestRatchet, optDir string, rt registry.Route) (*ChannelPointer, *Manifest, error) {
	p, err := Channel(ctx, s, pub, rt.Account, rt.App, rt.Channel)
	if err != nil {
		return nil, nil, err
	}
	if err := ratchet.Admit(rt.Account, p); err != nil {
		return nil, nil, err
	}
	m, err := ensureStagedDigest(ctx, s, optDir, rt.Account, rt.App, p.Version, rt.Host, p.DigestOf(p.Version), stageCheck{})
	if err != nil {
		return nil, nil, err
	}
	if m == nil || m.Kind != "binary" || m.Artifacts[adoptPlatform].SHA256 == "" {
		return nil, nil, os.ErrPermission
	}
	return p, m, nil
}