import type { AuthState } from "../../api";

const authStorageKey = "train-watcher-auth";

export function loadAuth(): AuthState | null {
  const raw = localStorage.getItem(authStorageKey);
  if (!raw) return null;
  try {
    return JSON.parse(raw) as AuthState;
  } catch {
    localStorage.removeItem(authStorageKey);
    return null;
  }
}

export function saveAuth(auth: AuthState) {
  localStorage.setItem(authStorageKey, JSON.stringify(auth));
}

export function clearAuth() {
  localStorage.removeItem(authStorageKey);
}