import { createServer } from "node:http";
import { readFile, stat } from "node:fs/promises";
import { extname, join, normalize } from "node:path";

// Minimal static server for the exported `out/` directory, used by the e2e
// suite. Cloudflare Pages Functions are not served here; tests that need
// `/api/*` mock those routes in the browser.

const root = process.argv[2] ?? "out";
const port = Number(process.argv[3] ?? 4319);

const contentTypes = {
  ".html": "text/html; charset=utf-8",
  ".css": "text/css; charset=utf-8",
  ".js": "text/javascript; charset=utf-8",
  ".json": "application/json; charset=utf-8",
  ".webp": "image/webp",
  ".png": "image/png",
  ".jpg": "image/jpeg",
  ".jpeg": "image/jpeg",
  ".svg": "image/svg+xml",
  ".ico": "image/x-icon",
  ".woff2": "font/woff2",
  ".txt": "text/plain; charset=utf-8",
  ".xml": "application/xml; charset=utf-8",
};

async function resolvePath(pathname) {
  const clean = normalize(decodeURIComponent(pathname)).replace(/^(\.\.[/\\])+/, "");
  let filePath = join(root, clean);
  try {
    const info = await stat(filePath);
    if (info.isDirectory()) filePath = join(filePath, "index.html");
  } catch {
    if (!extname(filePath)) filePath += ".html";
  }
  return filePath;
}

createServer(async (request, response) => {
  try {
    const url = new URL(request.url, `http://127.0.0.1:${port}`);
    const filePath = await resolvePath(url.pathname);
    const body = await readFile(filePath);
    response.writeHead(200, { "Content-Type": contentTypes[extname(filePath)] ?? "application/octet-stream" });
    response.end(body);
  } catch {
    try {
      const notFound = await readFile(join(root, "404.html"));
      response.writeHead(404, { "Content-Type": "text/html; charset=utf-8" });
      response.end(notFound);
    } catch {
      response.writeHead(404);
      response.end("Not found");
    }
  }
}).listen(port, "127.0.0.1", () => console.log(`serving ${root} at http://127.0.0.1:${port}`));