// Resend-cooldown keying (SD-0001 §5.2, INV-3; bug #20). The server's cooldown is
// per-address, so the client countdown must be too: it blocks sending only while it
// is running AND the current input is the address it was set for. Normalization
// mirrors the backend's normalize_email (lowercase + strip, INV-2).

function normalize(email: string): string {
  return email.trim().toLowerCase();
}

export function cooldownAppliesTo(
  input: string,
  cooldownEmail: string | null,
  secondsLeft: number,
): boolean {
  if (secondsLeft <= 0 || cooldownEmail === null) return false;
  return normalize(input) === normalize(cooldownEmail);
}