#!/usr/bin/env node
// A static server for site/ as Vercel serves it (clean URLs, the two rewrites of site/vercel.json), with /api/* passed through to
// the live site so the chain scene paints from the real feed. For captures and the overlap sweep on a build box; never a deploy.
//   node tools/site/serve.mjs [port] [site-dir] [api-origin]       default 4500, ../../site, https://igneum.network
import http from 'node:http';
import https from 'node:https';
import { readFileSync, existsSync, statSync } from 'node:fs';
import { join, extname, dirname } from 'node:path';
import { fileURLToPath } from 'node:url';
const port = Number(process.argv[2] || 4500);
const site = process.argv[3] || join(dirname(fileURLToPath(import.meta.url)), '..', '..', 'site');
const api = process.argv[4] || 'https://igneum.network';
const TYPES = { '.html': 'text/html; charset=utf-8', '.css': 'text/css', '.js': 'text/javascript', '.mjs': 'text/javascript', '.json': 'application/json', '.png': 'image/png', '.ico': 'image/x-icon', '.svg': 'image/svg+xml', '.webp': 'image/webp', '.woff2': 'font/woff2', '.webmanifest': 'application/manifest+json', '.xml': 'application/xml', '.txt': 'text/plain' };
function file(p) { try { return existsSync(p) && statSync(p).isFile() ? p : null; } catch (e) { return null; } }
http.createServer((req, res) => {
  const u = new URL(req.url, 'http://x');
  if (u.pathname.startsWith('/api/')) {
    // an http: origin (or one that refuses) answers 502 so the pages render their pending state; the server itself never dies
    const fail = () => { if (!res.headersSent) res.writeHead(502, { 'content-type': 'application/json' }); res.end('{"ok":false,"error":"upstream"}'); };
    try {
      const mod = api.startsWith('http:') ? http : https;
      const r = mod.request(api + u.pathname + u.search, { method: 'GET', headers: { accept: 'application/json' } }, pr => { res.writeHead(pr.statusCode || 502, { 'content-type': pr.headers['content-type'] || 'application/json', 'cache-control': 'no-store' }); pr.pipe(res); });
      r.on('error', fail); r.end();
    } catch (e) { fail(); }
    return;
  }
  let p = u.pathname.replace(/\/+$/, '') || '/';
  if (/^\/block\/[^/]+$/.test(p)) p = '/block'; else if (/^\/address\/[^/]+$/.test(p)) p = '/address'; else if (p === '/benchmarks') p = '/miners';
  const rel = p === '/' ? 'index.html' : p.slice(1);
  const hit = file(join(site, rel)) || file(join(site, rel + '.html')) || file(join(site, rel, 'index.html'));
  if (!hit) { res.writeHead(404, { 'content-type': 'text/html; charset=utf-8' }); res.end(readFileSync(join(site, '404.html'))); return; }
  res.writeHead(200, { 'content-type': TYPES[extname(hit)] || 'application/octet-stream', 'cache-control': 'no-store' }); res.end(readFileSync(hit));
}).listen(port, '127.0.0.1', () => console.log('site at http://127.0.0.1:' + port + '/ from ' + site + ', /api from ' + api));