// 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.

import "dart:async";
import "dart:io";
import "dart:isolate";

void sendData(List<int> data, int port) {
  Socket socket = new Socket("127.0.0.1", port);
  socket.onConnect = () {
    socket.onData = () {
      Expect.fail("No data response was expected");
    };
    socket.outputStream.onNoPendingWrites = () {
      socket.close(true);
    };
    socket.outputStream.write(data);
  };
}

class EarlyCloseTest {
  EarlyCloseTest(this.data,
                 String this.exception,
                 [bool this.expectRequest = false]);

  Future execute(HttpServer server) {
    Completer c = new Completer();

    bool calledOnRequest = false;
    bool calledOnError = false;
    server.defaultRequestHandler =
        (HttpRequest request, HttpResponse response) {
          Expect.isTrue(expectRequest);
          Expect.isFalse(calledOnError);
          Expect.isFalse(calledOnRequest, "onRequest called multiple times");
          calledOnRequest = true;
        };
    ReceivePort port = new ReceivePort();
    server.onError = (error) {
      Expect.isFalse(calledOnError);
      Expect.equals(exception, error.message);
      Expect.equals(expectRequest, calledOnRequest);
      calledOnError = true;
      port.close();
      c.complete(null);
    };

    List<int> d;
    if (data is List<int>) d = data;
    if (data is String) d = data.charCodes;
    if (d == null) Expect.fail("Invalid data");
    sendData(d, server.port);

    return c.future;
  }

  final data;
  final String exception;
  final bool expectRequest;
}

void testEarlyClose1() {
  List<EarlyCloseTest> tests = new List<EarlyCloseTest>();
  void add(Object data, String exception, {bool expectRequest: false}) {
    tests.add(new EarlyCloseTest(data, exception, expectRequest));
  }
  // The empty packet is valid.

  // Close while sending header
  String message = "Connection closed before full request header was received";
  add("G", message);
  add("GET /", message);
  add("GET / HTTP/1.1", message);
  add("GET / HTTP/1.1\r\n", message);

  // Close while sending content
  add("GET / HTTP/1.1\r\nContent-Length: 100\r\n\r\n",
      "Connection closed before full request body was received",
      expectRequest: true);
  add("GET / HTTP/1.1\r\nContent-Length: 100\r\n\r\n1",
      "Connection closed before full request body was received",
      expectRequest: true);


  HttpServer server = new HttpServer();
  server.listen("127.0.0.1", 0);
  void runTest(Iterator it) {
    if (it.moveNext()) {
      it.current.execute(server).then((_) => runTest(it));
    } else {
      server.close();
    }
  }
  runTest(tests.iterator);
}

testEarlyClose2() {
  var server = new HttpServer();
  server.listen("127.0.0.1", 0);
  server.onError = (e) { /* ignore */ };
  server.defaultRequestHandler = (request, response) {
    String name = new Options().script;
    new File(name).openInputStream().pipe(response.outputStream);
  };

  var count = 0;
  var makeRequest;
  makeRequest = () {
    Socket socket = new Socket("127.0.0.1", server.port);
    socket.onConnect = () {
      var data = "GET / HTTP/1.1\r\nContent-Length: 0\r\n\r\n".charCodes;
      socket.writeList(data, 0, data.length);
      socket.close();
      if (++count < 10) {
        makeRequest();
      } else {
        server.close();
      }
    };
  };

  makeRequest();
}

void main() {
  testEarlyClose1();
  testEarlyClose2();
}