import React, { useEffect, useState } from 'react';
import { motion, AnimatePresence } from 'framer-motion';

declare global {
  interface Window {
    instgrm?: {
      Embeds: {
        process: () => void;
      };
    };
  }
}

const posts = [
  'https://www.instagram.com/p/DSOFijljukL/',
  'https://www.instagram.com/p/DSGh7rMjVes/',
  'https://www.instagram.com/p/DRIIUECj4f6/',
  'https://www.instagram.com/p/DJOvmvcIoo7/',
  'https://www.instagram.com/p/DJOu5b7IL4t/',
  'https://www.instagram.com/p/DIQnhO0oJgw/',
  'https://www.instagram.com/p/DIJUVqbI4EH/',
  'https://www.instagram.com/p/DHlvDNyIDRa/',
  'https://www.instagram.com/p/DHlub_iojwv/',
  'https://www.instagram.com/p/DJOvdVLIZpM/',
];

const InstagramFeed: React.FC = () => {
  const [selectedPost, setSelectedPost] = useState<string | null>(null);

  // Double the list for seamless infinite marquee scroll
  const duplicatedPosts = [...posts, ...posts];

  useEffect(() => {
    // Process Instagram embeds whenever the component mounts or the lightbox opens
    if (window.instgrm) {
      window.instgrm.Embeds.process();
    } else {
      const script = document.createElement('script');
      script.src = '//www.instagram.com/embed.js';
      script.async = true;
      document.body.appendChild(script);
    }
  }, [selectedPost]);

  return (
    <>
      <section className="py-24 px-6 md:px-12 bg-stone-50 dark:bg-stone-900 overflow-hidden">
        <div className="max-w-[1400px] mx-auto">
          <span className="block font-body text-xs uppercase tracking-[0.3em] text-stone-400 mb-6">
            Follow Along
          </span>
          <div className="flex items-end justify-between mb-16 px-2">
            <h2 className="font-display text-4xl md:text-5xl text-text-main dark:text-white leading-none">
              From the Studio
            </h2>
            <a
              href="https://www.instagram.com/knuth.ceramics"
              target="_blank"
              rel="noopener noreferrer"
              className="text-xs font-bold uppercase tracking-widest text-stone-500 hover:text-stone-900 dark:hover:text-white transition-colors"
            >
              @knuth.ceramics →
            </a>
          </div>

          {/* Infinite Carousel */}
          <div className="relative group overflow-hidden">
            <style>{`
              @keyframes marquee {
                0% { transform: translateX(0); }
                100% { transform: translateX(-${posts.length * 342}px); /* 326px width + 16px gap */ }
              }
              .animate-marquee {
                animation: marquee 50s linear infinite;
              }
              .animate-marquee:hover {
                animation-play-state: paused;
              }
            `}</style>
            <div className="flex gap-4 animate-marquee w-max py-4">
              {duplicatedPosts.map((permalink, idx) => (
                <div
                  key={idx}
                  className="relative flex-shrink-0 w-[326px] overflow-hidden rounded-[8px] group/item cursor-pointer bg-white"
                >
                  {/* Invisible Overlay to capture clicks. 
                      Because iframes block events, we put a div above it.
                      On hover it reveals a subtle mask to indicate interactivity. */}
                  <div
                    className="absolute inset-0 z-10 bg-black/0 group-hover/item:bg-black/50 transition-colors duration-300 flex flex-col items-center justify-center opacity-0 group-hover/item:opacity-100"
                    onClick={() => setSelectedPost(permalink)}
                  >
                    <p className="text-white font-display text-lg px-4 text-center font-bold drop-shadow-md">
                      View Post
                    </p>
                  </div>

                  {/* The Instagram Embed itself.
                      By omitting data-instgrm-captioned we hide the caption/hashtags directly. */}
                  <div className="pointer-events-none">
                    <blockquote
                      className="instagram-media"
                      data-instgrm-permalink={`${permalink}?utm_source=ig_embed&utm_campaign=loading`}
                      data-instgrm-version="14"
                      style={{
                        background: '#FFF',
                        border: 0,
                        margin: 0,
                        maxWidth: '540px',
                        minWidth: '326px',
                        padding: 0,
                        width: '100%',
                      }}
                    />
                  </div>
                </div>
              ))}
            </div>
          </div>
        </div>
      </section>

      {/* Lightbox Modal */}
      <AnimatePresence>
        {selectedPost && (
          <motion.div
            className="fixed inset-0 bg-black/90 z-50 flex items-center justify-center p-4 overflow-y-auto pt-[100px]"
            initial={{ opacity: 0 }}
            animate={{ opacity: 1 }}
            exit={{ opacity: 0 }}
            onClick={() => setSelectedPost(null)}
          >
            <motion.div
              className="relative max-w-lg w-full bg-white dark:bg-stone-900 rounded-xl overflow-hidden my-auto"
              initial={{ scale: 0.9, opacity: 0 }}
              animate={{ scale: 1, opacity: 1 }}
              exit={{ scale: 0.9, opacity: 0 }}
              transition={{ type: 'spring', damping: 25, stiffness: 300 }}
              onClick={(e) => e.stopPropagation()}
            >
              {/* Close button inside modal container */}
              <button
                className="absolute top-2 right-2 text-stone-500 bg-white border border-stone-200 shadow-md rounded-full w-8 h-8 flex items-center justify-center hover:bg-stone-100 transition-colors z-[60]"
                onClick={() => setSelectedPost(null)}
              >
                <span className="font-bold">×</span>
              </button>

              {/* Instagram Embed WITH caption shown in the Lightbox */}
              <div className="w-full bg-white mt-12 pb-4 px-2">
                <blockquote
                  className="instagram-media"
                  data-instgrm-captioned
                  data-instgrm-permalink={`${selectedPost}?utm_source=ig_embed&utm_campaign=loading`}
                  data-instgrm-version="14"
                  style={{
                    background: '#FFF',
                    border: 0,
                    boxShadow: 'none',
                    margin: '0',
                    maxWidth: '540px',
                    minWidth: '326px',
                    padding: 0,
                    width: '100%',
                  }}
                />
              </div>
            </motion.div>
          </motion.div>
        )}
      </AnimatePresence>
    </>
  );
};

export default InstagramFeed;