<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8">
  <title>Mozilla Bug</title>
  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
</head>
<body>
<script>
"use strict";

window.onload = function() {
  const { require } = ChromeUtils.importESModule("resource://devtools/shared/loader/Loader.sys.mjs");
  const WebSocketServer = require("devtools/server/socket/websocket-server");

  const ServerSocket = Components.Constructor("@mozilla.org/network/server-socket;1",
    "nsIServerSocket", "init");

  add_task(async function() {
    // Create a TCP server on auto-assigned port
    const server = new ServerSocket(-1, true, -1);
    ok(server, `Launched WebSocket server on port ${server.port}`);

    let input, output;

    server.asyncListen({
      async onSocketAccepted(socket, transport) {
        info("Accepted incoming connection");
        input = transport.openInputStream(0, 0, 0);
        output = transport.openOutputStream(0, 0, 0);

        // Perform the WebSocket handshake
        const webSocket = await WebSocketServer.accept(transport, input, output);

        // Echo the received message back to the sender
        webSocket.onmessage = ({ data }) => {
          info("Server received message, echoing back");
          webSocket.send(data);
        };
      },

      onStopListening(socket, status) {
        info(`Server stopped listening with status: ${status}`);
      },
    });

    SimpleTest.registerCleanupFunction(() => {
      server.close();
    });

    // Create client connection
    const client = await new Promise((resolve, reject) => {
      const socket = new WebSocket(`ws://localhost:${server.port}`);
      socket.onopen = () => resolve(socket);
      socket.onerror = reject;
    });
    ok(client, `Created WebSocket connection to port ${server.port}`);

    // Create a promise that resolves when the WebSocket closes
    const closed = new Promise(resolve => {
      client.onclose = resolve;
    });

    // Send a message
    const message = "hello there";
    client.send(message);
    info("Sent a message to server");
    // Check that it was echoed
    const echoedMessage = await new Promise((resolve, reject) => {
      client.onmessage = ({ data }) => resolve(data);
      client.onerror = reject;
    });

    is(echoedMessage, message, "Echoed message matches");

    // Close the connection
    client.close();
    await closed;

    // Prevent leaking the streams by closing them before test ends
    input.close();
    output.close();
  });
};
</script>
</body>
</html>
