/*
 * Copyright (C) 2017 The Android Open foo Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "base/test/test_task_runner.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "ipc/client.h"
#include "ipc/host.h"

#include "ipc/src/test/greeter_service.ipc.h"
#include "ipc/src/test/greeter_service.pb.h"

namespace ipc_test {
namespace {

using ::testing::_;
using ::testing::Invoke;
using ::perfetto::ipc::AsyncResult;
using ::perfetto::ipc::Client;
using ::perfetto::ipc::Deferred;
using ::perfetto::ipc::Host;
using ::perfetto::ipc::Service;
using ::perfetto::ipc::ServiceProxy;

constexpr char kSockName[] = "/tmp/perfetto_ipc_test.sock";

class MockEventListener : public ServiceProxy::EventListener {
 public:
  MOCK_METHOD0(OnConnect, void());
  MOCK_METHOD0(OnDisconnect, void());
};

class MockGreeterService : public ipc_test::Greeter {
 public:
  MOCK_METHOD2(OnSayHello,
               void(const GreeterRequestMsg&, DeferredGreeterReplyMsg*));
  void SayHello(const GreeterRequestMsg& request,
                DeferredGreeterReplyMsg reply) override {
    OnSayHello(request, &reply);
  }

  MOCK_METHOD2(OnWaveGoodbye,
               void(const GreeterRequestMsg&, DeferredGreeterReplyMsg*));
  void WaveGoodbye(const GreeterRequestMsg& request,
                   DeferredGreeterReplyMsg reply) override {
    OnWaveGoodbye(request, &reply);
  }
};

class IPCIntegrationTest : public ::testing::Test {
 protected:
  void SetUp() override { unlink(kSockName); }
  void TearDown() override { unlink(kSockName); }

  perfetto::base::TestTaskRunner task_runner_;
  MockEventListener svc_proxy_events_;
};

TEST_F(IPCIntegrationTest, SayHelloWaveGoodbye) {
  std::unique_ptr<Host> host = Host::CreateInstance(kSockName, &task_runner_);
  ASSERT_TRUE(host);

  MockGreeterService* svc = new MockGreeterService();
  ASSERT_TRUE(host->ExposeService(std::unique_ptr<Service>(svc)));

  auto on_connect = task_runner_.CreateCheckpoint("on_connect");
  EXPECT_CALL(svc_proxy_events_, OnConnect()).WillOnce(Invoke(on_connect));
  std::unique_ptr<Client> cli =
      Client::CreateInstance(kSockName, &task_runner_);
  std::unique_ptr<GreeterProxy> svc_proxy(new GreeterProxy(&svc_proxy_events_));
  cli->BindService(svc_proxy->GetWeakPtr());
  task_runner_.RunUntilCheckpoint("on_connect");

  {
    GreeterRequestMsg req;
    req.set_name("Mr Bojangles");
    auto on_reply = task_runner_.CreateCheckpoint("on_hello_reply");
    Deferred<GreeterReplyMsg> deferred_reply(
        [on_reply](AsyncResult<GreeterReplyMsg> reply) {
          ASSERT_TRUE(reply.success());
          ASSERT_FALSE(reply.has_more());
          ASSERT_EQ("Hello Mr Bojangles", reply->message());
          on_reply();
        });

    EXPECT_CALL(*svc, OnSayHello(_, _))
        .WillOnce(Invoke([](const GreeterRequestMsg& host_req,
                            Deferred<GreeterReplyMsg>* host_reply) {
          auto reply = AsyncResult<GreeterReplyMsg>::Create();
          reply->set_message("Hello " + host_req.name());
          host_reply->Resolve(std::move(reply));
        }));
    svc_proxy->SayHello(req, std::move(deferred_reply));
    task_runner_.RunUntilCheckpoint("on_hello_reply");
  }

  {
    GreeterRequestMsg req;
    req.set_name("Mrs Bojangles");
    auto on_reply = task_runner_.CreateCheckpoint("on_goodbye_reply");
    Deferred<GreeterReplyMsg> deferred_reply(
        [on_reply](AsyncResult<GreeterReplyMsg> reply) {
          ASSERT_TRUE(reply.success());
          ASSERT_FALSE(reply.has_more());
          ASSERT_EQ("Goodbye Mrs Bojangles", reply->message());
          on_reply();
        });

    EXPECT_CALL(*svc, OnWaveGoodbye(_, _))
        .WillOnce(Invoke([](const GreeterRequestMsg& host_req,
                            Deferred<GreeterReplyMsg>* host_reply) {
          auto reply = AsyncResult<GreeterReplyMsg>::Create();
          reply->set_message("Goodbye " + host_req.name());
          host_reply->Resolve(std::move(reply));
        }));
    svc_proxy->WaveGoodbye(req, std::move(deferred_reply));
    task_runner_.RunUntilCheckpoint("on_goodbye_reply");
  }
}

}  // namespace
}  // namespace ipc_test