import { createReadStream, existsSync, statSync } from "node:fs";
import { createServer } from "node:http";
import { extname, join, normalize, resolve } from "node:path";

const root = resolve(process.cwd(), process.argv[2] ?? "dist");
const port = Number(process.env.PORT ?? 4173);
const mimeTypes = new Map([
  [".css", "text/css; charset=utf-8"],
  [".html", "text/html; charset=utf-8"],
  [".js", "text/javascript; charset=utf-8"],
  [".json", "application/json; charset=utf-8"],
  [".png", "image/png"],
  [".svg", "image/svg+xml"],
  [".webp", "image/webp"],
]);

const server = createServer((request, response) => {
  const rawPath = decodeURIComponent((request.url ?? "/").split("?")[0]);
  const relativePath = normalize(rawPath).replace(/^([/\\])+/, "");
  let filePath = resolve(join(root, relativePath || "index.html"));

  if (!filePath.startsWith(root)) {
    response.writeHead(403).end("Forbidden");
    return;
  }

  if (!existsSync(filePath) || statSync(filePath).isDirectory()) {
    filePath = join(root, "index.html");
  }

  response.setHeader("Content-Type", mimeTypes.get(extname(filePath)) ?? "application/octet-stream");
  response.setHeader("X-Content-Type-Options", "nosniff");
  response.setHeader("Referrer-Policy", "strict-origin-when-cross-origin");
  response.setHeader("Cross-Origin-Opener-Policy", "same-origin");
  createReadStream(filePath).pipe(response);
});

server.listen(port, "127.0.0.1", () => {
  console.log(`GLM Hub disponible en http://127.0.0.1:${port}`);
});