'use client';

import React, { useEffect, useRef, useState } from 'react';
import { cn } from '@/components/ui';

interface RevealProps {
  children: React.ReactNode;
  className?: string;
  threshold?: number;
  delay?: number;
}

export default function Reveal({ children, className, threshold = 0.1, delay = 0 }: RevealProps) {
  const [isVisible, setIsVisible] = useState(false);
  const ref = useRef<HTMLDivElement>(null);

  useEffect(() => {
    const observer = new IntersectionObserver(
      ([entry]) => {
        if (entry.isIntersecting) {
          setIsVisible(true);
          observer.unobserve(entry.target);
        }
      },
      { threshold }
    );

    const currentRef = ref.current;
    if (currentRef) {
      observer.observe(currentRef);
    }

    return () => {
      if (currentRef) {
        observer.unobserve(currentRef);
      }
    };
  }, [threshold]);

  return (
    <div
      ref={ref}
      className={cn('reveal-on-scroll', isVisible && 'is-visible', className)}
      style={{ transitionDelay: `${delay}ms` }}
    >
      {children}
    </div>
  );
}