const WebSocket = require("ws");

const wss = new WebSocket.Server({
  port: 8080
  // perMessageDeflate: {
  //   zlibDeflateOptions: {
  //     // See zlib defaults.
  //     chunkSize: 1024,
  //     memLevel: 7,
  //     level: 3
  //   },
  //   zlibInflateOptions: {
  //     chunkSize: 10 * 1024
  //   },
  //   // Other options settable:
  //   clientNoContextTakeover: true, // Defaults to negotiated value.
  //   serverNoContextTakeover: true, // Defaults to negotiated value.
  //   serverMaxWindowBits: 10, // Defaults to negotiated value.
  //   // Below options specified as default values.
  //   concurrencyLimit: 10, // Limits zlib concurrency for perf.
  //   threshold: 1024 // Size (in bytes) below which messages
  //   // should not be compressed.
  // }
});

wss.on("connection", function connection(ws, req) {
  ws.on("message", function incoming(message) {
    console.log("received: %s:", message);
  });

  const ip = req.socket.remoteAddress;
  console.log("received connection from", ip);
  ws.send("hello from server!");
});