import React from 'react';

/**
 * Extracts YouTube video ID from various URL formats
 * Supports:
 * - https://www.youtube.com/watch?v=VIDEO_ID
 * - https://youtu.be/VIDEO_ID
 * - https://www.youtube.com/embed/VIDEO_ID
 * - Direct VIDEO_ID
 */
function extractVideoId(url) {
  if (!url) return null;
  
  // If it's already just an ID (no URL)
  if (!url.includes('http') && !url.includes('youtube') && !url.includes('youtu.be')) {
    return url;
  }

  // Extract from various YouTube URL formats
  const patterns = [
    /(?:youtube\.com\/watch\?v=|youtu\.be\/|youtube\.com\/embed\/)([^&\n?#]+)/,
    /^([a-zA-Z0-9_-]{11})$/ // Direct ID
  ];

  for (const pattern of patterns) {
    const match = url.match(pattern);
    if (match && match[1]) {
      return match[1];
    }
  }

  return null;
}

export default function YouTubeEmbed({ url, title = 'Project walkthrough video' }) {
  const videoId = extractVideoId(url);

  if (!videoId) {
    return null;
  }

  const embedUrl = `https://www.youtube.com/embed/${videoId}?rel=0&modestbranding=1`;

  return (
    <section className="mt-8" aria-labelledby="walkthrough-heading">
      <h2 id="walkthrough-heading" className="h3 mb-4">Walkthrough Video</h2>
      <div className="relative aspect-video overflow-hidden rounded-xl bg-slate-100">
        <iframe
          src={embedUrl}
          title={title}
          allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
          allowFullScreen
          className="absolute inset-0 w-full h-full"
          loading="lazy"
        />
      </div>
    </section>
  );
}