import { useEffect, useState } from 'react';

const read = (query: string): boolean =>
  typeof window !== 'undefined' &&
  typeof window.matchMedia === 'function' &&
  window.matchMedia(query).matches;

/** Reactive `window.matchMedia(query).matches`. SSR-safe (false). */
export function useMediaQuery(query: string): boolean {
  const [matches, setMatches] = useState<boolean>(() => read(query));

  useEffect(() => {
    if (typeof window === 'undefined' || typeof window.matchMedia !== 'function') {
      return undefined;
    }
    const mql = window.matchMedia(query);
    const onChange = (event: MediaQueryListEvent) => setMatches(event.matches);
    setMatches(mql.matches);
    mql.addEventListener('change', onChange);
    return () => mql.removeEventListener('change', onChange);
  }, [query]);

  return matches;
}