import util from 'util';
const setTimeoutPromise = util.promisify(setTimeout);

export async function delay(time: number) {
  await setTimeoutPromise(time);
  console.log(`延迟${time}毫秒后执行`);
}

export async function retryAsync(func: () => Promise<any>, x = 3, timeout = 10 * 1000) {
  let attempts = 0;
  while (attempts < x) {
    try {
      return await func();
    } catch (error) {
      console.log(`第${attempts + 1}次尝试失败：${error}`);
      await delay(timeout);
      attempts++;
    }
  }
  throw new Error(`Async function failed after ${x} attempts.`);
}

export function getRandomUniqueElements(arr: any[], x: number): any[] {
  const result: any[] = [];
  const copyArr = arr.slice();
  while (result.length < x && copyArr.length > 0) {
    const randomIndex = Math.floor(Math.random() * copyArr.length);
    result.push(copyArr.splice(randomIndex, 1)[0]);
  }
  return result;
}