export function createSerializedRunner(task, options = {}) {
  let activePromise = null;

  return function runSerialized(...args) {
    if (activePromise) {
      return activePromise;
    }

    const timeoutMs = Number(options.timeoutMs);
    let timeout;
    const taskPromise = Promise.resolve(task(...args));
    const nextPromise = Number.isFinite(timeoutMs) && timeoutMs > 0
      ? Promise.race([
          taskPromise,
          new Promise((_, reject) => {
            timeout = setTimeout(() => {
              reject(new Error(options.timeoutErrorMessage || "SERIALIZED_RUNNER_TIMEOUT"));
            }, timeoutMs);
          }),
        ])
      : taskPromise;

    activePromise = nextPromise
      .finally(() => {
        if (timeout) {
          clearTimeout(timeout);
        }
        activePromise = null;
      });

    return activePromise;
  };
}