export function debounce<T extends (...args: Parameters<T>) => ReturnType<T>>(
  fn: T,
  delay: number
): (...args: Parameters<T>) => void {
  let timeout: ReturnType<typeof setTimeout> | undefined;
  return (...args: Parameters<T>) => {
    if (timeout) {
      clearTimeout(timeout);
    }
    timeout = setTimeout(() => {
      fn(...args);
    }, delay);
  };
}

export function throttle<T extends (...args: Parameters<T>) => ReturnType<T>>(
  fn: T,
  interval: number
): (...args: Parameters<T>) => void {
  let lastTime = 0;
  let timeout: ReturnType<typeof setTimeout> | undefined;

  return (...args: Parameters<T>) => {
    const now = Date.now();
    const remaining = interval - (now - lastTime);

    if (remaining <= 0) {
      if (timeout) {
        clearTimeout(timeout);
        timeout = undefined;
      }
      lastTime = now;
      fn(...args);
    } else if (!timeout) {
      timeout = setTimeout(() => {
        lastTime = Date.now();
        timeout = undefined;
        fn(...args);
      }, remaining);
    }
  };
}