package cluster

import (
	"fmt"
	"strings"
)

// normalizeShutdownMode runs one orchestration or CLI step.
// Signature: normalizeShutdownMode(raw string) (string, error).
// Why: keeps shutdown behavior explicit and safe by allowing only cluster-only
// semantics while preserving compatibility with legacy "config" callers.
func normalizeShutdownMode(raw string) (string, error) {
	switch strings.TrimSpace(raw) {
	case "", "config", "cluster-only":
		return "cluster-only", nil
	case "poweroff":
		return "", fmt.Errorf("shutdown mode %q has been removed; ananke no longer powers off hosts", raw)
	default:
		return "", fmt.Errorf("unsupported shutdown mode %q (expected config|cluster-only)", raw)
	}
}