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import { createRequire } from "node:module";
const net = createRequire(import.meta.url)("net");

const buffer = Buffer.from("Hello World!");
var counter = 0;
const handlers = {
  open() {
    if (!socket.data?.isServer) {
      if (!this.write(buffer)) {
        socket.data = { pending: buffer };
      }
    }
  },
  data(buffer) {
    if (!this.write(buffer)) {
      this.data = { pending: buffer.slice() };
      return;
    }
    counter++;
  },
  drain() {
    const pending = this.data?.pending;
    if (!pending) return;
    if (this.write(pending)) {
      this.data = undefined;
      counter++;
      return;
    }
  },
};

if (net.createServer) {
  const server = net.createServer(function (socket) {
    socket.data = { isServer: true };
    socket.on("connection", handlers.open.bind(socket));
    socket.on("data", handlers.data.bind(socket));
    socket.on("drain", handlers.drain.bind(socket));
    socket.setEncoding("binary");
  });

  setInterval(() => {
    console.log("Wrote", counter, "messages");
    counter = 0;
  }, 1000);

  server.listen(8000);
} else {
  const handlers = {
    open(socket) {
      if (!socket.data?.isServer) {
        if (!socket.write(msg)) {
          socket.data = { pending: msg };
        }
      }
    },
    data(socket, buffer) {
      if (!socket.write(buffer)) {
        socket.data = { pending: buffer };
        return;
      }
      counter++;
    },
    drain(socket) {
      const pending = socket.data?.pending;
      if (!pending) return;
      if (socket.write(pending)) {
        socket.data = undefined;
        counter++;
        return;
      }
    },
  };

  setInterval(() => {
    console.log("Wrote", counter, "messages");
    counter = 0;
  }, 1000);

  const server = Bun.listen({
    socket: handlers,
    hostname: "0.0.0.0",
    port: 8000,
    data: {
      isServer: true,
    },
  });
}

const socket = net.connect({ host: "0.0.0.0", port: 8000 }, () => {});
socket.on("connection", handlers.open.bind(socket));
socket.on("data", handlers.data.bind(socket));
socket.on("drain", handlers.drain.bind(socket));
socket.setEncoding("binary");
socket.write(buffer);