// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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 <vector>

#include <gmock/gmock.h>

#include <process/future.hpp>
#include <process/gmock.hpp>
#include <process/message.hpp>
#include <process/owned.hpp>

#include <stout/option.hpp>
#include <stout/try.hpp>

#include "master/flags.hpp"
#include "master/master.hpp"

#include "tests/containerizer.hpp"
#include "tests/mesos.hpp"

using mesos::internal::master::Master;

using mesos::internal::slave::Slave;

using mesos::master::detector::MasterDetector;

using process::Future;
using process::Owned;
using process::PID;

using std::vector;

using testing::_;
using testing::AtMost;
using testing::DoAll;
using testing::Return;

namespace mesos {
namespace internal {
namespace tests {


class RegistrarZooKeeperTest : public MesosZooKeeperTest {};


// This is a simple end to end test that makes sure a master using log
// storage with ZooKeeper can successfully launch a task.
TEST_F(RegistrarZooKeeperTest, TaskRunning)
{
  Try<Owned<cluster::Master>> master = StartMaster();
  ASSERT_SOME(master);

  MockExecutor exec(DEFAULT_EXECUTOR_ID);
  TestContainerizer containerizer(&exec);

  Owned<MasterDetector> detector = master.get()->createDetector();
  Try<Owned<cluster::Slave>> slave = StartSlave(detector.get(), &containerizer);
  ASSERT_SOME(slave);

  MockScheduler sched;
  MesosSchedulerDriver driver(
      &sched, DEFAULT_FRAMEWORK_INFO, master.get()->pid, DEFAULT_CREDENTIAL);

  EXPECT_CALL(sched, registered(&driver, _, _));

  Future<vector<Offer>> offers;
  EXPECT_CALL(sched, resourceOffers(&driver, _))
    .WillOnce(FutureArg<1>(&offers))
    .WillRepeatedly(Return()); // Ignore subsequent offers.

  driver.start();

  AWAIT_READY(offers);
  EXPECT_NE(0u, offers->size());

  TaskInfo task = createTask(offers.get()[0], "dummy", DEFAULT_EXECUTOR_ID);

  EXPECT_CALL(exec, registered(_, _, _, _));

  EXPECT_CALL(exec, launchTask(_, _))
    .WillOnce(SendStatusUpdateFromTask(TASK_RUNNING));

  Future<Nothing> resourcesUpdated;
  EXPECT_CALL(containerizer,
              update(_, Resources(offers.get()[0].resources())))
    .WillOnce(DoAll(FutureSatisfy(&resourcesUpdated),
                    Return(Nothing())));

  Future<TaskStatus> status;
  EXPECT_CALL(sched, statusUpdate(&driver, _))
    .WillOnce(FutureArg<1>(&status));

  driver.launchTasks(offers.get()[0].id(), {task});

  AWAIT_READY(status);
  EXPECT_EQ(TASK_RUNNING, status->state());

  AWAIT_READY(resourcesUpdated);

  EXPECT_CALL(exec, shutdown(_))
    .Times(AtMost(1));

  driver.stop();
  driver.join();
}

} // namespace tests {
} // namespace internal {
} // namespace mesos {