// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// @dart = 2.9
import 'dart:async';
import 'dart:io';
import 'package:async_helper/async_helper.dart';
import 'package:expect/expect.dart';

void main() {
  // A virtual tun/tap interface should be created with following instrutctions:
  // Create an interface with name [tap0],
  //    sudo ip tuntap add name [tap0] mode tap
  // Assign an ipv6 address [fe80:1::1],
  //    sudo ip -6 addr add dev [tap0] [fe80:1::1] scope link nodad
  // Check for virtual interface with ipv6 set,
  //    ip address show
  asyncStart();
  try {
    // Make sure the address here is the same as what it shows in
    // "ip address show"
    var ipv6 = 'fe80:1::1%tap0';

    // Parses a Link-local address on Linux and Windows will throw an exception.
    InternetAddress(ipv6);

    HttpServer.bind(ipv6, 0).then((server) {
      server.listen((request) {
        var timer = new Timer.periodic(const Duration(milliseconds: 0), (_) {
          request.response
              .write('data:${new DateTime.now().millisecondsSinceEpoch}\n\n');
        });
        request.response.done.whenComplete(() {
          timer.cancel();
        }).catchError((_) {});
      });

      var client = new HttpClient();
      client
          .getUrl(Uri.parse("http://[${ipv6}]:${server.port}"))
          .then((request) => request.close())
          .then((response) {
        print(
            'reponse: status code: ${response.statusCode}, reason: ${response.reasonPhrase}');
        int bytes = 0;
        response.listen((data) {
          bytes += data.length;
          if (bytes > 100) {
            client.close(force: true);
          }
        }, onError: (error) {
          server.close();
        });
      });
      asyncEnd();
    });
  } catch (e) {
    Expect.fail('SocketException: $e');
    asyncEnd();
  }
}