/** Shared shape for server-action results consumed by useActionState forms. */
export interface ActionState {
  ok?: boolean;
  error?: string | null;
  message?: string | null;
  fieldErrors?: Record<string, string>;
  /** arbitrary data returned to the form (e.g. cooldown seconds, QR data URL) */
  data?: Record<string, unknown>;
}

export const idle: ActionState = { ok: false, error: null };

export function fieldErrorsFrom(issues: Array<{ path: PropertyKey[]; message: string }>): Record<string, string> {
  const out: Record<string, string> = {};
  for (const i of issues) {
    const k = String(i.path[0] ?? '_');
    if (!out[k]) out[k] = i.message;
  }
  return out;
}