const KEY = 'accessmate_prefs';

export function load(): Record<string, unknown> {
  try {
    // JSON.parse happily accepts any valid JSON value, not just objects — 'null',
    // '5', and '"x"' all parse without throwing, so a malformed/corrupted stored
    // value (or one written by a future/different format) can come back as null
    // or a primitive instead of an object, crashing every caller that assigns a
    // property onto it.
    const parsed: unknown = JSON.parse(localStorage.getItem(KEY) ?? '{}');
    return (parsed !== null && typeof parsed === 'object' && !Array.isArray(parsed)) ? parsed as Record<string, unknown> : {};
  } catch (_e) {
    return {};
  }
}

export function save(prefs: Record<string, unknown>): void {
  try {
    localStorage.setItem(KEY, JSON.stringify(prefs));
  } catch (_e) {
    // localStorage unavailable (private browsing, storage full, etc.)
  }
}