package release

import (
	"context"
	"crypto/sha256"
	"encoding/hex"
	"encoding/json"

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

func WithHostWrites(config hostwrite.Config) PassOption {
	return func(c *passConfig) { c.hostWrites = config }
}

func releaseIdentity(m *Manifest) (hostwrite.Identity, error) {
	raw, err := json.Marshal(m)
	if err != nil {
		return hostwrite.Identity{}, err
	}
	sum := sha256.Sum256(raw)
	return hostwrite.Identity{Release: "sha256:" + hex.EncodeToString(sum[:])}, nil
}

func withReleaseWork(ctx context.Context, work hostwrite.Work, id hostwrite.Identity, fn func() error) error {
	if ctx == nil || work == nil {
		return hostwrite.ErrUnavailable
	}
	return work.With(ctx, id, fn)
}

// WithSelectedRestarts supplies receivers that retain the original selection
// through restart and rollback start. Receivers validate at their final effect;
// network waits must not hold the hostguard flock.
func WithSelectedRestarts(restart, start hostwrite.Callback) PassOption {
	return func(c *passConfig) { c.selectedRestart = restart; c.selectedStart = start }
}