/**
 * Idempotent start/stop wrapper over setInterval -- a second start() is a no-op rather than a
 * competing timer, and stop() is safe to call even if never started. Same shape as pi-papyrus's,
 * pi-pipes', and pi-packed's own BoundedPoll.
 */
export class BoundedPoll {
  private timer: ReturnType<typeof setInterval> | undefined;

  start(intervalMs: number, tick: () => void): void {
    if (this.timer) return;
    this.timer = setInterval(tick, intervalMs);
  }

  stop(): void {
    if (!this.timer) return;
    clearInterval(this.timer);
    this.timer = undefined;
  }
}