// Copyright (c) 2017, 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.

/// @assertion void authenticateProxy=(
///  Future<bool> f(
///  String host,
///  int port,
///  String scheme,
///  String realm
///  )
///  )
/// Sets the function to be called when a proxy is requesting authentication.
/// Information on the proxy in use and the security realm for the authentication
/// are passed in the arguments host, port and realm.
///
/// The function returns a Future which should complete when the authentication
/// has been resolved. If credentials cannot be provided the Future should
/// complete with false. If credentials are available the function should add
/// these using addProxyCredentials before completing the Future with the value
/// true.
///
/// If the Future completes with true the request will be retried using the
/// updated credentials. Otherwise response processing will continue normally.
/// @description Checks that this setter sets the function to be called when a
/// site is requesting a proxy authentication. Test Digest authentication
/// @author sgrekhov@unipro.ru

import "dart:io";
import 'dart:async';
import "dart:convert";
import "../../../Utils/expect.dart";

test() async {
  HttpServer server = await HttpServer.bind(InternetAddress.loopbackIPv4, 0);
  server.listen((HttpRequest request) {
    var response = request.response;
    if (request.headers[HttpHeaders.proxyAuthorizationHeader] == null) {
      response.statusCode = HttpStatus.unauthorized;
      response.headers.set(
          HttpHeaders.proxyAuthenticateHeader, 'Digest, realm="realm", nonce=123');
      response.statusCode = HttpStatus.proxyAuthenticationRequired;
      response.close();
    } else {
      var authorization = request.headers[HttpHeaders.proxyAuthorizationHeader]?[0];
      Expect.isTrue(authorization?.contains('Digest'));
      Expect.isTrue(authorization?.contains('username="co19-test"'));
      Expect.isTrue(authorization?.contains('realm="realm"'));
      Expect.isTrue(authorization?.contains('algorithm="MD5"'));
      Expect.isTrue(
          authorization?.contains('uri="http://127.0.0.1:${server.port}"'));
      response.close();
      server.close();
      asyncEnd();
    }
  });
  HttpClient client = new HttpClient();
  client.findProxy = (Uri uri) {
    return "PROXY ${InternetAddress.loopbackIPv4.address}:${server.port}";
  };

  client.authenticateProxy =
      (String host, int port, String scheme, String realm) {
    Expect.equals(InternetAddress.loopbackIPv4.address, host);
    Expect.equals(server.port, port);
    Expect.equals("Digest", scheme);
    Expect.equals("realm", realm);
    Completer<bool> completer = new Completer<bool>();
    client.addProxyCredentials(InternetAddress.loopbackIPv4.address, port,
        "realm", new HttpClientDigestCredentials("co19-test", "password"));
    completer.complete(true);
    return completer.future;
  };

  client
      .getUrl(Uri.parse(
          "http://${InternetAddress.loopbackIPv4.address}:${server.port}"))
      .then((HttpClientRequest request) => request.close())
      .then((HttpClientResponse response) {
    response.cast<List<int>>().transform(utf8.decoder).listen((content) {});
  });
}

main() {
  asyncStart();
  test();
}