import * as React from 'react';
import { notFound } from 'next/navigation';
import { blogPosts } from '../../../src/data/blogPosts';
import { Tag } from '../../../src/components/Tag';
import { CodeBlock } from '../../../src/components/ArticleBlockquote';
import { H2 } from '../../../src/components/ArticleHeading';
import { Paragraph, LeadParagraph } from '../../../src/components/ArticleParagraph';
import { UL, LI } from '../../../src/components/ArticleList';
import { FileExamplesList } from '../../../src/components/FileExamplesList';
import { FileExampleManager } from '../../../src/data/fileExamples';
import { BlogPostClient } from '../../../src/components/BlogPostClient';
import { PageHeader } from '../../../src/components/PageHeader';
import { Section } from '../../../src/components/Section';
import { Reveal } from '../../../src/components/Reveal';

export async function generateStaticParams() {
  return blogPosts.map((post) => ({
    slug: post.slug,
  }));
}

export default async function BlogPostPage({ params }: { params: Promise<{ slug: string }> }) {
  const { slug } = await params;
  const post = blogPosts.find((p) => p.slug === slug);

  if (!post) {
    notFound();
  }

  const formattedDate = new Date(post.date).toLocaleDateString('en-US', {
    month: 'long',
    day: 'numeric',
    year: 'numeric'
  });

  const wordCount = post.description.split(/\s+/).length + 100;
  const readingTime = Math.max(1, Math.ceil(wordCount / 200));

  const showFileExamples = post.tags?.some(tag =>
    ['architecture', 'design-patterns', 'system-design', 'docker', 'deployment'].includes(tag)
  );

  // Load file examples for the post
  let groups: any[] = [];
  if (showFileExamples) {
    const allGroups = await FileExampleManager.getAllGroups();
    groups = allGroups
      .map((group) => ({
        ...group,
        files: group.files.filter((file) => {
          if (file.postSlug !== slug) return false;
          return true;
        }),
      }))
      .filter((group) => group.files.length > 0);
  }

  return (
    <div className="flex flex-col gap-24 py-12 md:py-24 overflow-hidden">
      <BlogPostClient readingTime={readingTime} title={post.title} />

      <PageHeader 
        title={post.title}
        description={post.description}
        backLink={{ href: '/blog', label: 'Zurück zum Blog' }}
        backgroundSymbol="B"
      />

      <main id="post-content">
        <Section number="01" title="Inhalt">
          <div className="prose prose-slate max-w-none">
            <div className="flex flex-wrap items-center gap-4 text-[10px] font-bold text-slate-400 mb-12 uppercase tracking-[0.2em]">
              <time dateTime={post.date}>{formattedDate}</time>
              <span className="text-slate-200">•</span>
              <span>{readingTime} min read</span>
            </div>

            {post.tags && post.tags.length > 0 && (
              <div className="flex flex-wrap gap-2 mb-12">
                {post.tags.map((tag, index) => (
                  <Tag key={tag} tag={tag} index={index} className="text-xs" />
                ))}
              </div>
            )}

            {slug === 'first-note' && (
              <>
                <LeadParagraph>
                  This blog is a public notebook. It's where I document things I learn, problems I solve, and tools I test.
                </LeadParagraph>
                <H2>Why write in public?</H2>
                <Paragraph>
                  I forget things. Writing them down helps. Making them public helps me think more clearly and might help someone else.
                </Paragraph>
                <H2>What to expect</H2>
                <UL>
                  <LI>Short entries, usually under 500 words</LI>
                  <LI>Practical solutions to specific problems</LI>
                  <LI>Notes on tools and workflows</LI>
                  <LI>Mistakes and what I learned</LI>
                </UL>
              </>
            )}
            
            {slug === 'debugging-tips' && (
              <>
                <LeadParagraph>
                  Sometimes the simplest debugging tool is the best one. Print statements get a bad reputation, but they're often exactly what you need.
                </LeadParagraph>
                <H2>Why print statements work</H2>
                <Paragraph>
                  Debuggers are powerful, but they change how your code runs. Print statements don't.
                </Paragraph>
                <CodeBlock language="python" showLineNumbers={true}>
{`def process_data(data):
    print(f"Processing {len(data)} items")
    result = expensive_operation(data)
    print(f"Operation result: {result}")
    return result`}
                </CodeBlock>
                
                <H2>Complete examples</H2>
                <Paragraph>
                  Here are some practical file examples you can copy and download. These include proper error handling and logging.
                </Paragraph>
                
                <div className="my-8">
                  <FileExamplesList groups={groups} />
                </div>
              </>
            )}

            {slug === 'architecture-patterns' && (
              <>
                <LeadParagraph>
                  Good software architecture is about making the right decisions early. Here are some patterns I've found useful in production systems.
                </LeadParagraph>
                <H2>Repository Pattern</H2>
                <Paragraph>
                  The repository pattern provides a clean separation between your business logic and data access layer. It makes your code more testable and maintainable.
                </Paragraph>
                
                <H2>Service Layer</H2>
                <Paragraph>
                  Services orchestrate business logic and coordinate between repositories and domain events. They keep your controllers thin and your business rules organized.
                </Paragraph>
                
                <H2>Domain Events</H2>
                <Paragraph>
                  Domain events help you decouple components and react to changes in your system. They're essential for building scalable, event-driven architectures.
                </Paragraph>
                
                <H2>Complete examples</H2>
                <Paragraph>
                  These TypeScript examples demonstrate modern architecture patterns for scalable applications. You can copy them directly into your project.
                </Paragraph>
                
                <div className="my-8">
                  <FileExamplesList groups={groups} />
                </div>
              </>
            )}

            {slug === 'docker-deployment' && (
              <>
                <LeadParagraph>
                  Docker has become the standard for containerizing applications. Here's how to set up production-ready deployments that are secure, efficient, and maintainable.
                </LeadParagraph>
                <H2>Multi-stage builds</H2>
                <Paragraph>
                  Multi-stage builds keep your production images small and secure by separating build and runtime environments. This reduces attack surface and speeds up deployments.
                </Paragraph>
                
                <H2>Health checks and monitoring</H2>
                <Paragraph>
                  Proper health checks ensure your containers are running correctly. Combined with restart policies, this gives you resilient, self-healing deployments.
                </Paragraph>
                
                <H2>Orchestration with Docker Compose</H2>
                <Paragraph>
                  Docker Compose makes it easy to manage multi-service applications in development and production. Define services, networks, and volumes in a single file.
                </Paragraph>
                
                <H2>Complete examples</H2>
                <Paragraph>
                  These Docker configurations are production-ready. Use them as a starting point for your own deployments.
                </Paragraph>
                
                <div className="my-8">
                  <FileExamplesList groups={groups} />
                </div>
              </>
            )}
          </div>
        </Section>
      </main>
    </div>
  );
}