const wait = (time: number) => new Promise((resolve) => setTimeout(resolve, time));

type InsistΛ = () => boolean | Promise<boolean>;

const insist = (λ: InsistΛ, time: number = 200): Promise<void> => {
  return new Promise((resolve) => {
    const insist = () => Promise.resolve(λ())
      .then((success: boolean) => {
        if (!success)
          throw new Error('Success not achieved. Keep insisting.');
        resolve();
      })
      .catch(() => wait(time).then(insist));
    return insist();
  });
};

export { insist as default, InsistΛ }