"use client";

import { useEffect, useRef, useState, type ReactNode } from "react";

export function Reveal({
  children,
  delay = 0,
  className = "",
}: {
  children: ReactNode;
  delay?: number;
  className?: string;
}) {
  const ref = useRef<HTMLDivElement>(null);
  const [visible, setVisible] = useState(false);

  useEffect(() => {
    const el = ref.current;
    if (!el) return;
    const io = new IntersectionObserver(
      ([entry]) => {
        if (entry.isIntersecting) {
          setVisible(true);
          io.disconnect();
        }
      },
      { threshold: 0.1, rootMargin: "0px 0px -40px 0px" }
    );
    io.observe(el);
    return () => io.disconnect();
  }, []);

  return (
    <div
      ref={ref}
      style={{ transitionDelay: `${delay}ms` }}
      className={`transition-all duration-700 ease-out ${
        visible ? "translate-y-0 opacity-100" : "translate-y-8 opacity-0"
      } ${className}`}
    >
      {children}
    </div>
  );
}