import { notFound } from 'next/navigation';
import { MDXRemote } from 'next-mdx-remote/rsc';
import { getPostBySlug } from '@/lib/blog';

interface BlogPostProps {
  params: {
    locale: string;
    slug: string;
  };
}

import Link from 'next/link';
import Image from 'next/image';
import VisualLinkPreview from '@/components/blog/VisualLinkPreview';
import Callout from '@/components/blog/Callout';
import HighlightBox from '@/components/blog/HighlightBox';
import Stats from '@/components/blog/Stats';

const components = {
  VisualLinkPreview,
  Callout,
  HighlightBox,
  Stats,
  a: ({ href, children, ...props }: any) => {
    if (href?.startsWith('/')) {
      return (
        <Link href={href} {...props} className="text-primary font-medium hover:underline decoration-2 underline-offset-2 transition-all">
          {children}
        </Link>
      );
    }
    return (
      <a
        href={href}
        {...props}
        target="_blank"
        rel="noopener noreferrer"
        className="text-primary font-medium hover:underline decoration-2 underline-offset-2 transition-all inline-flex items-center gap-1"
      >
        {children}
        <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M10 6H6a2 2 0 00-2 2v10a2 2 0 002 2h10a2 2 0 002-2v-4M14 4h6m0 0v6m0-6L10 14" />
        </svg>
      </a>
    );
  },
  img: (props: any) => (
    <div className="my-12">
      <img {...props} className="rounded-xl shadow-lg max-w-full h-auto mx-auto" />
      {props.alt && (
        <p className="text-sm text-text-secondary text-center mt-3 italic">{props.alt}</p>
      )}
    </div>
  ),
  h2: ({ children, ...props }: any) => (
    <h2 {...props} className="text-3xl font-bold text-text-primary mt-16 mb-6 pb-3 border-b-2 border-primary/20">
      {children}
    </h2>
  ),
  h3: ({ children, ...props }: any) => (
    <h3 {...props} className="text-2xl font-bold text-text-primary mt-12 mb-4">
      {children}
    </h3>
  ),
  p: ({ children, ...props }: any) => (
    <p {...props} className="text-lg text-text-secondary leading-relaxed mb-6">
      {children}
    </p>
  ),
  ul: ({ children, ...props }: any) => (
    <ul {...props} className="my-8 space-y-3">
      {children}
    </ul>
  ),
  ol: ({ children, ...props }: any) => (
    <ol {...props} className="my-8 space-y-3 list-decimal list-inside">
      {children}
    </ol>
  ),
  li: ({ children, ...props }: any) => (
    <li {...props} className="text-lg text-text-secondary flex items-start gap-3">
      <span className="text-primary mt-1.5 flex-shrink-0">
        <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 20 20">
          <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z" clipRule="evenodd" />
        </svg>
      </span>
      <span className="flex-1">{children}</span>
    </li>
  ),
  blockquote: ({ children, ...props }: any) => (
    <blockquote {...props} className="my-8 pl-6 border-l-4 border-primary bg-neutral-light/30 py-4 pr-6 rounded-r-lg">
      <div className="text-lg text-text-primary italic">
        {children}
      </div>
    </blockquote>
  ),
  strong: ({ children, ...props }: any) => (
    <strong {...props} className="font-bold text-primary">
      {children}
    </strong>
  ),
  code: ({ children, ...props }: any) => (
    <code {...props} className="px-2 py-1 bg-neutral-light text-primary rounded font-mono text-sm">
      {children}
    </code>
  ),
  pre: ({ children, ...props }: any) => (
    <pre {...props} className="my-8 p-6 bg-neutral-dark/5 rounded-xl overflow-x-auto">
      {children}
    </pre>
  ),
};

export default async function BlogPost({ params: { locale, slug } }: BlogPostProps) {
  const post = await getPostBySlug(slug, locale);

  if (!post) {
    notFound();
  }

  return (
    <article className="bg-gradient-to-b from-neutral-light/30 to-white min-h-screen">
      {/* Featured Image Header */}
      {post.frontmatter.featuredImage && (
        <div className="relative w-full h-[300px] md:h-[500px] overflow-hidden">
          <img
            src={post.frontmatter.featuredImage}
            alt={post.frontmatter.title}
            className="w-full h-full object-cover"
          />
          <div className="absolute inset-0 bg-gradient-to-t from-black/70 via-black/30 to-transparent" />
          
          {/* Title overlay on image */}
          <div className="absolute bottom-0 left-0 right-0 p-8 md:p-12">
            <div className="container mx-auto max-w-4xl">
              {post.frontmatter.category && (
                <span className="inline-block px-4 py-2 bg-primary text-white text-sm font-medium rounded-full mb-4">
                  {post.frontmatter.category}
                </span>
              )}
              <h1 className="text-3xl md:text-5xl lg:text-6xl font-bold text-white mb-4 leading-tight drop-shadow-lg">
                {post.frontmatter.title}
              </h1>
              <time dateTime={post.frontmatter.date} className="text-white/90 text-sm md:text-base">
                {new Date(post.frontmatter.date).toLocaleDateString(locale, {
                  year: 'numeric',
                  month: 'long',
                  day: 'numeric'
                })}
              </time>
            </div>
          </div>
        </div>
      )}

      {/* Content */}
      <div className="container mx-auto px-4 py-12 md:py-16 max-w-4xl">
        {/* If no featured image, show header here */}
        {!post.frontmatter.featuredImage && (
          <header className="mb-12">
            {post.frontmatter.category && (
              <div className="mb-4">
                <span className="inline-block px-4 py-2 bg-primary text-white text-sm font-medium rounded-full">
                  {post.frontmatter.category}
                </span>
              </div>
            )}
            <h1 className="text-4xl md:text-5xl lg:text-6xl font-bold text-text-primary mb-6 leading-tight">
              {post.frontmatter.title}
            </h1>
            <time dateTime={post.frontmatter.date} className="text-text-secondary">
              {new Date(post.frontmatter.date).toLocaleDateString(locale, {
                year: 'numeric',
                month: 'long',
                day: 'numeric'
              })}
            </time>
          </header>
        )}

        {/* Excerpt/Lead paragraph if available */}
        {post.frontmatter.excerpt && (
          <div className="mb-12 p-6 md:p-8 bg-white rounded-xl shadow-sm border-l-4 border-primary">
            <p className="text-xl md:text-2xl text-text-primary leading-relaxed font-light">
              {post.frontmatter.excerpt}
            </p>
          </div>
        )}

        {/* Main content with enhanced styling */}
        <div className="bg-white rounded-xl shadow-sm p-6 md:p-10">
          <div className="prose prose-lg max-w-none">
            <MDXRemote source={post.content} components={components} />
          </div>
        </div>

        {/* Call to action section */}
        <div className="mt-12 p-8 bg-gradient-to-r from-primary/10 to-primary/5 rounded-xl border border-primary/20">
          <h3 className="text-2xl font-bold text-text-primary mb-4">
            {locale === 'de' ? 'Haben Sie Fragen?' : 'Have questions?'}
          </h3>
          <p className="text-text-secondary mb-6">
            {locale === 'de'
              ? 'Unser Team steht Ihnen gerne zur Verfügung. Kontaktieren Sie uns für weitere Informationen zu unseren Kabellösungen.'
              : 'Our team is happy to help. Contact us for more information about our cable solutions.'}
          </p>
          <Link
            href={`/${locale}/contact`}
            className="inline-flex items-center gap-2 px-6 py-3 bg-primary text-white font-medium rounded-lg hover:bg-primary/90 transition-colors"
          >
            {locale === 'de' ? 'Kontakt aufnehmen' : 'Get in touch'}
            <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M17 8l4 4m0 0l-4 4m4-4H3" />
            </svg>
          </Link>
        </div>

        {/* Back to blog link */}
        <div className="mt-12 pt-8 border-t border-neutral-dark/20">
          <Link
            href={`/${locale}/blog`}
            className="inline-flex items-center gap-2 text-primary hover:underline font-medium text-lg group"
          >
            <svg className="w-5 h-5 transition-transform group-hover:-translate-x-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 19l-7-7 7-7" />
            </svg>
            {locale === 'de' ? 'Zurück zum Blog' : 'Back to Blog'}
          </Link>
        </div>
      </div>
    </article>
  );
}