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

const root = join(import.meta.dirname, "dist");
const port = Number(process.argv[2] || 4173);
const types = {
  ".html": "text/html; charset=utf-8",
  ".css": "text/css; charset=utf-8",
  ".js": "text/javascript; charset=utf-8",
  ".svg": "image/svg+xml",
};

createServer(async (req, res) => {
  const path = new URL(req.url, "http://127.0.0.1").pathname;
  const file = path === "/" ? "index.html" : path;
  try {
    const body = await readFile(join(root, file));
    res.writeHead(200, { "content-type": types[extname(file)] || "application/octet-stream" });
    res.end(body);
  } catch {
    res.writeHead(404).end("not found");
  }
}).listen(port, "127.0.0.1", () => console.log(`preview http://127.0.0.1:${port}/`));