import React, { useEffect } from 'react';

export default function Lightbox({ images, currentIndex, onClose, onNext, onPrev }) {
  useEffect(() => {
    const handleKeyDown = (e) => {
      if (e.key === 'Escape') {
        onClose();
      } else if (e.key === 'ArrowRight') {
        onNext();
      } else if (e.key === 'ArrowLeft') {
        onPrev();
      }
    };

    document.addEventListener('keydown', handleKeyDown);
    return () => {
      document.removeEventListener('keydown', handleKeyDown);
    };
  }, [onClose, onNext, onPrev]);

  if (!images || images.length === 0) return null;

  return (
    <div className="fixed inset-0 z-[9999] bg-black bg-opacity-90 flex items-center justify-center p-4" onClick={onClose}
         role="dialog" aria-modal="true" aria-label="Image viewer">
      <div className="relative max-w-5xl max-h-full" onClick={(e) => e.stopPropagation()}> {/* Prevent closing when clicking on image */}
        <img 
          src={images[currentIndex]}
          alt={`Gallery image ${currentIndex + 1}`}
          className="max-w-full max-h-[80vh] object-contain rounded-lg shadow-xl"
        />

        {/* Close Button */}
        <button
          className="absolute top-4 right-4 text-white text-3xl p-2 rounded-full bg-white/20 hover:bg-white/40 transition-colors duration-200"
          onClick={onClose}
          aria-label="Close Lightbox"
        >
          &times;
        </button>

        {/* Navigation Buttons */}
        {images.length > 1 && (
          <>
            <button
              className="absolute left-4 top-1/2 -translate-y-1/2 text-white text-4xl p-2 rounded-full bg-white/20 hover:bg-white/40 transition-colors duration-200"
              onClick={onPrev}
              aria-label="Previous Image"
            >
              &lsaquo;
            </button>
            <button
              className="absolute right-4 top-1/2 -translate-y-1/2 text-white text-4xl p-2 rounded-full bg-white/20 hover:bg-white/40 transition-colors duration-200"
              onClick={onNext}
              aria-label="Next Image"
            >
              &rsaquo;
            </button>
          </>
        )}

        {/* Image Counter */}
        <div className="absolute bottom-4 left-1/2 -translate-x-1/2 text-white text-lg bg-black/50 px-4 py-2 rounded-full">
          {currentIndex + 1} / {images.length}
        </div>
      </div>
    </div>
  );
}