export function adminErrorMessage(error: unknown): string {
  if (!(error instanceof Error)) return "The administrative operation failed.";
  const message = error.message;
  const jsonStart = message.indexOf("{");
  if (jsonStart >= 0) {
    try {
      const parsed = JSON.parse(message.slice(jsonStart)) as { detail?: unknown };
      if (typeof parsed.detail === "string") return parsed.detail;
      if (Array.isArray(parsed.detail)) {
        return parsed.detail.map((item) => typeof item === "object" && item && "msg" in item ? String((item as { msg: unknown }).msg) : String(item)).join("; ");
      }
    } catch {
      // Fall through to the original message.
    }
  }
  return message;
}

export function formatDateTime(value?: string | null): string {
  if (!value) return "Never";
  const date = new Date(value);
  return Number.isNaN(date.getTime()) ? value : date.toLocaleString();
}

export function joinLabels(values: Array<{ name: string }>): string {
  return values.length ? values.map((value) => value.name).join(", ") : "—";
}