const path = require("path");
const express = require("express");

const app = express();
const ROOT = __dirname;
const PORT = Number(process.env.PORT) || 3000;

app.use(express.static(ROOT, { extensions: ["html"] }));

app.get("/", function (_req, res) {
  res.sendFile(path.join(ROOT, "index.html"));
});

app.get("/pages/:page", function (req, res, next) {
  const file = path.join(ROOT, "pages", req.params.page);
  res.sendFile(file, function (err) {
    if (err) next();
  });
});

app.use(function (_req, res) {
  res.status(404).send("Not found");
});

const server = app.listen(PORT, function () {
  console.log("AIFO portal: http://localhost:" + PORT);
});

server.on("error", function (err) {
  if (err.code === "EADDRINUSE") {
    console.error("Port " + PORT + " is already in use.");
    console.error("");
    console.error("Options:");
    console.error("  1) Stop the process using port " + PORT + " (Windows):");
    console.error("       netstat -ano | findstr :" + PORT);
    console.error("       taskkill /PID <pid> /F");
    console.error("  2) Use another port:");
    console.error("       set PORT=3001 && npm start");
    process.exit(1);
  }
  throw err;
});