/*
 *  Copyright 2008 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include <memory>

#include "webrtc/base/gunit.h"
#include "webrtc/base/logging.h"
#include "webrtc/base/thread.h"
#include "webrtc/logging/rtc_event_log/rtc_event_log.h"
#include "webrtc/media/base/fakemediaengine.h"
#include "webrtc/media/base/fakevideocapturer.h"
#include "webrtc/media/base/testutils.h"
#include "webrtc/media/engine/fakewebrtccall.h"
#include "webrtc/p2p/base/faketransportcontroller.h"
#include "webrtc/pc/channelmanager.h"

namespace {
const bool kDefaultSrtpRequired = true;
}

namespace cricket {

static const AudioCodec kAudioCodecs[] = {
    AudioCodec(97, "voice", 1, 2, 3), AudioCodec(111, "OPUS", 48000, 32000, 2),
};

static const VideoCodec kVideoCodecs[] = {
    VideoCodec(99, "H264"), VideoCodec(100, "VP8"), VideoCodec(96, "rtx"),
};

class ChannelManagerTest : public testing::Test {
 protected:
  ChannelManagerTest()
      : fme_(new cricket::FakeMediaEngine()),
        fdme_(new cricket::FakeDataEngine()),
        cm_(new cricket::ChannelManager(
            std::unique_ptr<MediaEngineInterface>(fme_),
            std::unique_ptr<DataEngineInterface>(fdme_),
            rtc::Thread::Current())),
        fake_call_(webrtc::Call::Config(&event_log_)),
        transport_controller_(
            new cricket::FakeTransportController(ICEROLE_CONTROLLING)) {
    fme_->SetAudioCodecs(MAKE_VECTOR(kAudioCodecs));
    fme_->SetVideoCodecs(MAKE_VECTOR(kVideoCodecs));
  }

  webrtc::RtcEventLogNullImpl event_log_;
  rtc::Thread network_;
  rtc::Thread worker_;
  // |fme_| and |fdme_| are actually owned by |cm_|.
  cricket::FakeMediaEngine* fme_;
  cricket::FakeDataEngine* fdme_;
  std::unique_ptr<cricket::ChannelManager> cm_;
  cricket::FakeCall fake_call_;
  std::unique_ptr<cricket::FakeTransportController> transport_controller_;
};

// Test that we startup/shutdown properly.
TEST_F(ChannelManagerTest, StartupShutdown) {
  EXPECT_FALSE(cm_->initialized());
  EXPECT_EQ(rtc::Thread::Current(), cm_->worker_thread());
  EXPECT_TRUE(cm_->Init());
  EXPECT_TRUE(cm_->initialized());
  cm_->Terminate();
  EXPECT_FALSE(cm_->initialized());
}

// Test that we startup/shutdown properly with a worker thread.
TEST_F(ChannelManagerTest, StartupShutdownOnThread) {
  network_.Start();
  worker_.Start();
  EXPECT_FALSE(cm_->initialized());
  EXPECT_EQ(rtc::Thread::Current(), cm_->worker_thread());
  EXPECT_TRUE(cm_->set_network_thread(&network_));
  EXPECT_EQ(&network_, cm_->network_thread());
  EXPECT_TRUE(cm_->set_worker_thread(&worker_));
  EXPECT_EQ(&worker_, cm_->worker_thread());
  EXPECT_TRUE(cm_->Init());
  EXPECT_TRUE(cm_->initialized());
  // Setting the network or worker thread while initialized should fail.
  EXPECT_FALSE(cm_->set_network_thread(rtc::Thread::Current()));
  EXPECT_FALSE(cm_->set_worker_thread(rtc::Thread::Current()));
  cm_->Terminate();
  EXPECT_FALSE(cm_->initialized());
}

// Test that we can create and destroy a voice and video channel.
TEST_F(ChannelManagerTest, CreateDestroyChannels) {
  EXPECT_TRUE(cm_->Init());
  cricket::DtlsTransportInternal* rtp_transport =
      transport_controller_->CreateDtlsTransport(
          cricket::CN_AUDIO, cricket::ICE_CANDIDATE_COMPONENT_RTP);
  cricket::VoiceChannel* voice_channel = cm_->CreateVoiceChannel(
      &fake_call_, cricket::MediaConfig(),
      rtp_transport, nullptr /*rtcp_transport*/,
      rtc::Thread::Current(), cricket::CN_AUDIO, kDefaultSrtpRequired,
      AudioOptions());
  EXPECT_TRUE(voice_channel != nullptr);
  cricket::VideoChannel* video_channel = cm_->CreateVideoChannel(
      &fake_call_, cricket::MediaConfig(),
      rtp_transport, nullptr /*rtcp_transport*/,
      rtc::Thread::Current(), cricket::CN_VIDEO, kDefaultSrtpRequired,
      VideoOptions());
  EXPECT_TRUE(video_channel != nullptr);
  cricket::RtpDataChannel* rtp_data_channel = cm_->CreateRtpDataChannel(
      cricket::MediaConfig(), rtp_transport, nullptr /*rtcp_transport*/,
      rtc::Thread::Current(), cricket::CN_DATA, kDefaultSrtpRequired);
  EXPECT_TRUE(rtp_data_channel != nullptr);
  cm_->DestroyVideoChannel(video_channel);
  cm_->DestroyVoiceChannel(voice_channel);
  cm_->DestroyRtpDataChannel(rtp_data_channel);
  cm_->Terminate();
}

// Test that we can create and destroy a voice and video channel with a worker.
TEST_F(ChannelManagerTest, CreateDestroyChannelsOnThread) {
  network_.Start();
  worker_.Start();
  EXPECT_TRUE(cm_->set_worker_thread(&worker_));
  EXPECT_TRUE(cm_->set_network_thread(&network_));
  EXPECT_TRUE(cm_->Init());
  transport_controller_.reset(
      new cricket::FakeTransportController(&network_, ICEROLE_CONTROLLING));
  cricket::DtlsTransportInternal* rtp_transport =
      transport_controller_->CreateDtlsTransport(
          cricket::CN_AUDIO, cricket::ICE_CANDIDATE_COMPONENT_RTP);
  cricket::VoiceChannel* voice_channel = cm_->CreateVoiceChannel(
      &fake_call_, cricket::MediaConfig(),
      rtp_transport, nullptr /*rtcp_transport*/,
      rtc::Thread::Current(), cricket::CN_AUDIO, kDefaultSrtpRequired,
      AudioOptions());
  EXPECT_TRUE(voice_channel != nullptr);
  cricket::VideoChannel* video_channel = cm_->CreateVideoChannel(
      &fake_call_, cricket::MediaConfig(),
      rtp_transport, nullptr /*rtcp_transport*/,
      rtc::Thread::Current(), cricket::CN_VIDEO, kDefaultSrtpRequired,
      VideoOptions());
  EXPECT_TRUE(video_channel != nullptr);
  cricket::RtpDataChannel* rtp_data_channel = cm_->CreateRtpDataChannel(
      cricket::MediaConfig(), rtp_transport, nullptr /*rtcp_transport*/,
      rtc::Thread::Current(), cricket::CN_DATA, kDefaultSrtpRequired);
  EXPECT_TRUE(rtp_data_channel != nullptr);
  cm_->DestroyVideoChannel(video_channel);
  cm_->DestroyVoiceChannel(voice_channel);
  cm_->DestroyRtpDataChannel(rtp_data_channel);
  cm_->Terminate();
}

TEST_F(ChannelManagerTest, SetVideoRtxEnabled) {
  std::vector<VideoCodec> codecs;
  const VideoCodec rtx_codec(96, "rtx");

  // By default RTX is disabled.
  cm_->GetSupportedVideoCodecs(&codecs);
  EXPECT_FALSE(ContainsMatchingCodec(codecs, rtx_codec));

  // Enable and check.
  EXPECT_TRUE(cm_->SetVideoRtxEnabled(true));
  cm_->GetSupportedVideoCodecs(&codecs);
  EXPECT_TRUE(ContainsMatchingCodec(codecs, rtx_codec));

  // Disable and check.
  EXPECT_TRUE(cm_->SetVideoRtxEnabled(false));
  cm_->GetSupportedVideoCodecs(&codecs);
  EXPECT_FALSE(ContainsMatchingCodec(codecs, rtx_codec));

  // Cannot toggle rtx after initialization.
  EXPECT_TRUE(cm_->Init());
  EXPECT_FALSE(cm_->SetVideoRtxEnabled(true));
  EXPECT_FALSE(cm_->SetVideoRtxEnabled(false));

  // Can set again after terminate.
  cm_->Terminate();
  EXPECT_TRUE(cm_->SetVideoRtxEnabled(true));
  cm_->GetSupportedVideoCodecs(&codecs);
  EXPECT_TRUE(ContainsMatchingCodec(codecs, rtx_codec));
}

}  // namespace cricket