/** Wall-clock + idle abort for QVAC completion streams. No Bare imports. */

function attachCompleteWatch(opts) {
  opts = opts || {};
  const timeoutMs = Number(opts.timeoutMs) > 0 ? Number(opts.timeoutMs) : 0;
  const idleMs = Number(opts.idleMs) > 0 ? Number(opts.idleMs) : 0;
  const abort = opts.abort;
  let timedOut = false;
  let wall = null;
  let idle = null;

  function clear() {
    if (wall) clearTimeout(wall);
    if (idle) clearTimeout(idle);
    wall = null;
    idle = null;
  }

  function fire() {
    if (timedOut) return;
    timedOut = true;
    clear();
    try {
      if (typeof abort === 'function') abort();
    } catch (_) {}
    if (typeof opts.onTimeout === 'function') opts.onTimeout();
  }

  if (timeoutMs) wall = setTimeout(fire, timeoutMs);

  function bump() {
    if (timedOut || !(idleMs > 0)) return;
    if (idle) clearTimeout(idle);
    idle = setTimeout(fire, idleMs);
  }

  return {
    bump,
    clear,
    timedOut: () => timedOut,
  };
}

module.exports = { attachCompleteWatch };