// Copyright (c) 2013, 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

// OtherResources=certificates/server_chain.pem
// OtherResources=certificates/server_key.pem
// OtherResources=certificates/trusted_certs.pem

import "package:expect/expect.dart";
import "package:path/path.dart";
import "package:async_helper/async_helper.dart";

import "dart:async";
import "dart:io";
import "dart:typed_data";

String localFile(path) => Platform.script.resolve(path).toFilePath();

SecurityContext serverContext = new SecurityContext()
  ..useCertificateChain(localFile('certificates/server_chain.pem'))
  ..usePrivateKey(localFile('certificates/server_key.pem'),
      password: 'dartdart');

SecurityContext clientContext = new SecurityContext()
  ..setTrustedCertificates(localFile('certificates/trusted_certs.pem'));

// 10 KiB of i%256 data.
Uint8List DATA =
    new Uint8List.fromList(new List.generate(10 * 1024, (i) => i % 256));

Future<SecureServerSocket> startServer() {
  return SecureServerSocket.bind("localhost", 0, serverContext).then((server) {
    server.listen((SecureSocket request) async {
      await request.drain();
      request
        ..add(DATA)
        ..close();
    });
    return server;
  });
}

main() async {
  asyncStart();
  var server = await SecureServerSocket.bind("localhost", 0, serverContext);
  server.listen((SecureSocket request) async {
    await request.drain();
    request
      ..add(DATA)
      ..close();
  });

  var socket = await RawSecureSocket.connect("localhost", server.port,
      context: clientContext);
  List<int> body = <int>[];
  // Close our end, since we're not sending data.
  socket.shutdown(SocketDirection.send);

  socket.listen((RawSocketEvent event) {
    switch (event) {
      case RawSocketEvent.read:
        // NOTE: We have a very low prime number here. The internal
        // ring buffers will not have a size of 3. This means that
        // we'll reach the point where we would like to read 1/2 bytes
        // at the end and then wrap around and read the next 2/1 bytes.
        // [This will ensure we trigger the bug.]
        body.addAll(socket.read(3));
        break;
      case RawSocketEvent.write:
        break;
      case RawSocketEvent.readClosed:
        break;
      default:
        throw "Unexpected event $event";
    }
  }, onError: (e, _) {
    Expect.fail('Unexpected error: $e');
  }, onDone: () {
    Expect.equals(body.length, DATA.length);
    for (int i = 0; i < body.length; i++) {
      Expect.equals(body[i], DATA[i]);
    }
    server.close();
    asyncEnd();
  });
}