server.js

require('dotenv').config();
const express = require('express');
const path = require('path');
const fs = require('fs');
const matter = require('gray-matter');
const { marked } = require('marked');
const { markedHighlight } = require('marked-highlight');
const hljs = require('highlight.js');

const app = express();
const PORT = process.env.PORT || 3000;
const BLOG_TITLE = process.env.BLOG_TITLE || 'Jake Hughes';
const SITE_URL = (process.env.SITE_URL || `http://localhost:${PORT}`).replace(/\/$/, '');
const POSTS_DIR = path.join(__dirname, 'posts');

marked.use(markedHighlight({
  langPrefix: 'hljs language-',
  highlight(code, lang) {
    const language = hljs.getLanguage(lang) ? lang : 'plaintext';
    return hljs.highlight(code, { language }).value;
  }
}));

app.set('view engine', 'ejs');
app.set('views', path.join(__dirname, 'views'));
app.use(express.static(path.join(__dirname, 'public')));

// Make siteUrl available to every template
app.use((req, res, next) => {
  res.locals.siteUrl = SITE_URL;
  next();
});

function getPosts() {
  if (!fs.existsSync(POSTS_DIR)) return [];
  return fs.readdirSync(POSTS_DIR)
    .filter(f => f.endsWith('.md'))
    .map(file => {
      const raw = fs.readFileSync(path.join(POSTS_DIR, file), 'utf8');
      const { data } = matter(raw);
      return { ...data, slug: file.replace('.md', '') };
    })
    .sort((a, b) => new Date(b.date) - new Date(a.date));
}

function readingTime(content) {
  const words = content.trim().split(/\s+/).length;
  return Math.max(1, Math.ceil(words / 200));
}

// ── SEO files ─────────────────────────────────────────────────────────────────

app.get('/robots.txt', (req, res) => {
  res.type('text/plain');
  res.send(`User-agent: *\nAllow: /\nDisallow: /blog/*?embed=1\nSitemap: ${SITE_URL}/sitemap.xml\n`);
});

app.get('/sitemap.xml', (req, res) => {
  const posts = getPosts();
  const urls = [
    { loc: SITE_URL, priority: '1.0' },
    { loc: `${SITE_URL}/blog`, priority: '0.8' },
    ...posts.map(p => ({
      loc: `${SITE_URL}/blog/${p.slug}`,
      lastmod: p.date || '',
      priority: '0.7'
    }))
  ];
  const xml = `<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
${urls.map(u => `  <url>
    <loc>${u.loc}</loc>${u.lastmod ? `\n    <lastmod>${u.lastmod}</lastmod>` : ''}
    <priority>${u.priority}</priority>
  </url>`).join('\n')}
</urlset>`;
  res.type('application/xml');
  res.send(xml);
});

// ── Portfolio homepage ────────────────────────────────────────────────────────

app.get('/', (req, res) => {
  const recentPosts = getPosts().slice(0, 3);
  res.render('index', { recentPosts, blogTitle: BLOG_TITLE });
});

// ── Blog ──────────────────────────────────────────────────────────────────────

app.get('/blog', (req, res) => {
  const posts = getPosts();
  const categories = [...new Set(posts.map(p => p.category).filter(Boolean))];
  const filter = req.query.category;
  const filtered = filter ? posts.filter(p => p.category === filter) : posts;
  res.render('blog', { posts: filtered, categories, activeCategory: filter || null, blogTitle: BLOG_TITLE });
});

app.get('/blog/:slug', (req, res) => {
  const filePath = path.join(POSTS_DIR, `${req.params.slug}.md`);
  if (!fs.existsSync(filePath)) return res.status(404).render('404', { blogTitle: BLOG_TITLE });
  const raw = fs.readFileSync(filePath, 'utf8');
  const { data, content } = matter(raw);
  const view = req.query.embed === '1' ? 'post-embed' : 'post';
  res.render(view, {
    post: { ...data, slug: req.params.slug, readingTime: readingTime(content) },
    content: marked(content),
    blogTitle: BLOG_TITLE
  });
});

// ── Watch & start ─────────────────────────────────────────────────────────────

fs.watch(POSTS_DIR, (event, filename) => {
  if (filename?.endsWith('.md')) console.log(`[posts] ${event}: ${filename}`);
});

app.listen(PORT, () => {
  console.log(`Running at http://localhost:${PORT}`);
  console.log(`Watching ${POSTS_DIR} for changes...`);
});