const express = require("express");
const path = require("path");
const fs = require("fs");
const isDev = process.env.NODE_ENV !== "production";
let livereload, connectLivereload;
if (isDev) {
  livereload = require("livereload");
  connectLivereload = require("connect-livereload");
}
const app = express();
const PORT = 3000;
const DOMAIN_FILE = path.join(__dirname, "domain.txt");

function readWsDomain() {
  try {
    const val = fs.readFileSync(DOMAIN_FILE, "utf8").trim();
    if (val) return val;
  } catch (err) {
    if (err.code !== "ENOENT") {
      console.warn("Failed to read domain.txt:", err.message);
    }
  }
  return process.env.WS_DOMAIN || "localhost:8080";
}

if (isDev) {
  const liveReloadServer = livereload.createServer();
  liveReloadServer.watch(path.join(__dirname, "public"));
  app.use(connectLivereload());
}

app.use(express.static("public"));

app.get("/ws-domain", (_req, res) => {
  res.json({ domain: readWsDomain() });
});

app.get("/", (req, res) => {
  res.sendFile(path.join(__dirname, "public", "index.html"));
});

app.listen(PORT, () => {
  console.log(`Client server running at http://localhost:${PORT}`);
});