/**
 * Remember a join request across reloads so the panel can resume the
 * coordinator poll instead of losing the “waiting for approval” state.
 *
 * Scoped by account + room and expires after 30 days; an old request should not
 * make the panel poll forever if the user abandoned it.
 */

const KEY_PREFIX = 'skatespots:cordn-pending:';
const MAX_AGE_MS = 30 * 24 * 60 * 60 * 1000;

function key(pubkey: string, gid: string): string {
  return `${KEY_PREFIX}${pubkey}:${gid}`;
}

export function readPendingJoin(pubkey: string, gid: string): boolean {
  if (!pubkey || !gid) return false;
  try {
    const raw = localStorage.getItem(key(pubkey, gid));
    if (raw === null) return false;
    const at = Number(raw);
    return Number.isFinite(at) && Date.now() - at < MAX_AGE_MS;
  } catch {
    return false;
  }
}

export function writePendingJoin(pubkey: string, gid: string): void {
  if (!pubkey || !gid) return;
  try {
    localStorage.setItem(key(pubkey, gid), String(Date.now()));
  } catch {
    // private mode / quota — polling still works for this session
  }
}

export function clearPendingJoin(pubkey: string, gid: string): void {
  if (!pubkey || !gid) return;
  try {
    localStorage.removeItem(key(pubkey, gid));
  } catch {
    // ignore
  }
}