import express from "express";
import http from "http";
import { Server } from "socket.io";

const app = express();
const server = http.createServer(app);
const io = new Server(server, {
  cors: {
    origin: "http://localhost:5173", // allow Vite frontend
    methods: ["GET", "POST"],
  },
});

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

  socket.on("paramUpdate", (data) => {
    socket.broadcast.emit("paramUpdate", data);
  });

  socket.on("pulse", () => {
    socket.broadcast.emit("pulse");
  });

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

app.use(express.static("frontend/dist"));
server.listen(3000, () => console.log("Server running on http://localhost"));