server.js

import { createServer } from "http";
import next from "next";
import { Server } from "socket.io";

const dev = process.env.NODE_ENV !== "production";
const hostname = "localhost";
const port = 3000;

const app = next({ dev, hostname, port });
const handler = app.getRequestHandler();

app.prepare().then(() => {
  const httpServer = createServer(handler);

  const io = new Server(httpServer, {
    cors: {
      origin: "*",
    },
  });

  io.on("connection", (socket) => {
    console.log("Client connected:", socket.id);

    socket.on("disconnect", () => {
      console.log("Client disconnected:", socket.id);
    });
  });

  global.io = io;

  httpServer.listen(port, () => {
    console.log(`Server running at http://localhost:${port}`);
  });
});