// Copyright (c) 2016, 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.

@TestOn('vm')
library;

import 'dart:async';
import 'dart:io';

import 'package:test/test.dart';
import 'package:web_socket_channel/io.dart';
import 'package:web_socket_channel/web_socket_channel.dart';

void main() {
  HttpServer server;

  test('communicates using existing WebSockets', () async {
    server = await HttpServer.bind('localhost', 0);
    addTearDown(server.close);
    server.transform(WebSocketTransformer()).listen((WebSocket webSocket) {
      final channel = IOWebSocketChannel(webSocket);
      channel.sink.add('hello!');
      channel.stream.listen((request) {
        expect(request, equals('ping'));
        channel.sink.add('pong');
        channel.sink.close(3678, 'raisin');
      });
    });

    final webSocket = await WebSocket.connect('ws://localhost:${server.port}');
    final channel = IOWebSocketChannel(webSocket);

    expect(channel.ready, completes);

    var n = 0;
    channel.stream.listen((message) {
      if (n == 0) {
        expect(message, equals('hello!'));
        channel.sink.add('ping');
      } else if (n == 1) {
        expect(message, equals('pong'));
      } else {
        fail('Only expected two messages.');
      }
      n++;
    }, onDone: expectAsync0(() {
      expect(channel.closeCode, equals(3678));
      expect(channel.closeReason, equals('raisin'));
    }));
  });

  test('.connect communicates immediately', () async {
    server = await HttpServer.bind('localhost', 0);
    addTearDown(server.close);
    server.transform(WebSocketTransformer()).listen((WebSocket webSocket) {
      final channel = IOWebSocketChannel(webSocket);
      channel.stream.listen((request) {
        expect(request, equals('ping'));
        channel.sink.add('pong');
      });
    });

    final channel = IOWebSocketChannel.connect('ws://localhost:${server.port}');

    expect(channel.ready, completes);

    channel.sink.add('ping');

    channel.stream.listen(expectAsync1((message) {
      expect(message, equals('pong'));
      channel.sink.close(3678, 'raisin');
    }), onDone: expectAsync0(() {}));
  });

  test('.connect communicates immediately using platform independent api',
      () async {
    server = await HttpServer.bind('localhost', 0);
    addTearDown(server.close);
    server.transform(WebSocketTransformer()).listen((WebSocket webSocket) {
      final channel = IOWebSocketChannel(webSocket);
      channel.stream.listen((request) {
        expect(request, equals('ping'));
        channel.sink.add('pong');
      });
    });

    final channel =
        WebSocketChannel.connect(Uri.parse('ws://localhost:${server.port}'));

    expect(channel.ready, completes);

    channel.sink.add('ping');

    channel.stream.listen(expectAsync1((message) {
      expect(message, equals('pong'));
      channel.sink.close(3678, 'raisin');
    }), onDone: expectAsync0(() {}));
  });

  test('.connect with an immediate call to close', () async {
    server = await HttpServer.bind('localhost', 0);
    addTearDown(server.close);
    server.transform(WebSocketTransformer()).listen((WebSocket webSocket) {
      expect(() async {
        final channel = IOWebSocketChannel(webSocket);
        await channel.stream.drain<void>();
        expect(channel.closeCode, equals(3678));
        expect(channel.closeReason, equals('raisin'));
      }(), completes);
    });

    final channel = IOWebSocketChannel.connect('ws://localhost:${server.port}');

    expect(channel.ready, completes);

    await channel.sink.close(3678, 'raisin');
  });

  test('.connect wraps a connection error in WebSocketChannelException',
      () async {
    server = await HttpServer.bind('localhost', 0);
    addTearDown(server.close);
    server.listen((request) {
      request.response.statusCode = 404;
      request.response.close();
    });

    final channel = IOWebSocketChannel.connect('ws://localhost:${server.port}');
    expect(channel.ready, throwsA(isA<WebSocketChannelException>()));
    expect(channel.stream.drain<void>(),
        throwsA(isA<WebSocketChannelException>()));
  });

  test('.protocols fail', () async {
    const passedProtocol = 'passed-protocol';
    const failedProtocol = 'failed-protocol';
    String selector(List<String> receivedProtocols) => passedProtocol;

    server = await HttpServer.bind('localhost', 0);
    addTearDown(server.close);
    server.listen((HttpRequest request) {
      expect(
        WebSocketTransformer.upgrade(request, protocolSelector: selector),
        throwsException,
      );
    });

    final channel = IOWebSocketChannel.connect(
      'ws://localhost:${server.port}',
      protocols: [failedProtocol],
    );
    expect(channel.ready, throwsA(isA<WebSocketChannelException>()));
    expect(
      channel.stream.drain<void>(),
      throwsA(isA<WebSocketChannelException>()),
    );
  });

  test('.protocols pass', () async {
    const passedProtocol = 'passed-protocol';
    String selector(List<String> receivedProtocols) => passedProtocol;

    server = await HttpServer.bind('localhost', 0);
    addTearDown(server.close);
    server.listen((HttpRequest request) async {
      final webSocket = await WebSocketTransformer.upgrade(
        request,
        protocolSelector: selector,
      );
      expect(webSocket.protocol, passedProtocol);
      await webSocket.close();
    });

    final channel = IOWebSocketChannel.connect('ws://localhost:${server.port}',
        protocols: [passedProtocol]);

    expect(channel.ready, completes);

    await channel.stream.drain<void>();
    expect(channel.protocol, passedProtocol);
  });

  test('.connects with a timeout parameters specified', () async {
    server = await HttpServer.bind('localhost', 0);
    addTearDown(server.close);
    server.transform(WebSocketTransformer()).listen((webSocket) {
      expect(() async {
        final channel = IOWebSocketChannel(webSocket);
        await channel.stream.drain<void>();
        expect(channel.closeCode, equals(3678));
        expect(channel.closeReason, equals('raisin'));
      }(), completes);
    });

    final channel = IOWebSocketChannel.connect(
      'ws://localhost:${server.port}',
      connectTimeout: const Duration(milliseconds: 1000),
    );
    expect(channel.ready, completes);
    await channel.sink.close(3678, 'raisin');
  });

  test('.respects timeout parameter when trying to connect', () async {
    server = await HttpServer.bind('localhost', 0);
    addTearDown(server.close);
    server
        .transform(StreamTransformer<HttpRequest, HttpRequest>.fromHandlers(
            handleData: (data, sink) {
          // Wait before we handle this request, to give the timeout a chance to
          // kick in. We still want to make sure that we handle the request
          // afterwards to not have false positives with the timeout
          Timer(const Duration(milliseconds: 800), () {
            sink.add(data);
          });
        }))
        .transform(WebSocketTransformer())
        .listen((webSocket) {
          final channel = IOWebSocketChannel(webSocket);
          channel.stream.drain<void>();
        });

    final channel = IOWebSocketChannel.connect(
      'ws://localhost:${server.port}',
      connectTimeout: const Duration(milliseconds: 500),
    );

    expect(channel.ready, throwsA(isA<TimeoutException>()));
    expect(channel.stream.drain<void>(), throwsA(anything));
  });

  test('.custom client is passed through', () async {
    server = await HttpServer.bind('localhost', 0);
    addTearDown(server.close);
    server.transform(StreamTransformer<HttpRequest, HttpRequest>.fromHandlers(
      handleData: (data, sink) {
        expect(data.headers['user-agent'], ['custom']);
        sink.add(data);
      },
    )).transform(WebSocketTransformer());

    final channel = IOWebSocketChannel.connect(
      'ws://localhost:${server.port}',
      customClient: HttpClient()..userAgent = 'custom',
    );

    expect(channel.ready, completes);
  });
}