package hostbox

import (
	"context"
	"encoding/hex"
	"github.com/carlosframework/platform/internal/controlname"
	"strings"
)

// ReplicaParkLeaseSet implements the data-bucket locks in claim section 6.2a.
// Generation parks also use their location's replica lock; the generation
// selector is in the chore, not an extra lock namespace.
func ReplicaParkLeaseSet(ctx context.Context, bucket, scope string) ([]string, error) {
	if ctx == nil || bucket == "" {
		return nil, ErrUnsupported
	}
	if err := ctx.Err(); err != nil {
		return nil, err
	}
	p := strings.Split(scope, "/")
	if len(p) < 2 || len(p) > 3 || !controlname.ValidHostShape(p[1]) {
		return nil, ErrUnsupported
	}
	switch p[0] {
	case "instances":
		if len(p) == 3 {
			if len(p[2]) != 64 || strings.ToLower(p[2]) != p[2] {
				return nil, ErrUnsupported
			}
			if _, err := hex.DecodeString(p[2]); err != nil {
				return nil, ErrUnsupported
			}
		}
	case "moves":
		if len(p) == 3 && (p[2] == "" || p[2] == "." || p[2] == ".." || strings.ContainsAny(p[2], "\\\x00:")) {
			return nil, ErrUnsupported
		}
	default:
		return nil, ErrUnsupported
	}
	return []string{scope}, nil
}