import * as React from "react";

/**
 * This hook allows you to debounce any fast changing value. The debounced value will only
 * reflect the latest value when the useDebounce hook has not been called for the specified
 * time period.
 *
 * Inspired by https://usehooks.com/useDebounce/
 */
export default function useDebounced<T>(value: T, delay: number): T {
  const [debouncedValue, setDebouncedValue] = React.useState(() => value);
  const timeoutIdRef = React.useRef<NodeJS.Timeout | null>(null);

  React.useEffect(
    () => () => {
      if (timeoutIdRef.current) {
        clearTimeout(timeoutIdRef.current);
        timeoutIdRef.current = null;
      }
    },
    []
  );

  React.useEffect(() => {
    timeoutIdRef.current = setTimeout(
      () => setDebouncedValue(() => value),
      delay
    );

    return () => {
      if (timeoutIdRef.current) {
        clearTimeout(timeoutIdRef.current);
        timeoutIdRef.current = null;
      }
    };
  }, [value, delay]);

  return debouncedValue;
}