"use client";

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

interface RevealOnViewProps {
  children: ReactNode;
  className?: string;
  delay?: number;
}

export function RevealOnView({
  children,
  className = "",
  delay = 0,
}: RevealOnViewProps) {
  const ref = useRef<HTMLDivElement>(null);
  const [isVisible, setIsVisible] = useState(false);

  useEffect(() => {
    const element = ref.current;
    if (!element) return;

    const observer = new IntersectionObserver(
      ([entry]) => {
        if (entry.isIntersecting) {
          setIsVisible(true);
          observer.unobserve(element);
        }
      },
      { rootMargin: "0px 0px 18% 0px", threshold: 0.01 }
    );

    observer.observe(element);
    return () => observer.disconnect();
  }, []);

  return (
    <div
      ref={ref}
      className={`reveal-on-view ${isVisible ? "is-visible" : ""} ${className}`}
      style={{ "--reveal-delay": `${delay}ms` } as CSSProperties}
    >
      {children}
    </div>
  );
}