// Copyright 2021 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "missive/scheduler/enqueue_job.h"

#include <memory>
#include <string>
#include <utility>

#include <base/bind.h>
#include <base/run_loop.h>
#include <base/test/task_environment.h>
#include <brillo/dbus/dbus_method_response.h>
#include <brillo/dbus/mock_dbus_method_response.h>
#include <gmock/gmock.h>
#include <gtest/gtest.h>

#include "missive/proto/interface.pb.h"
#include "missive/proto/record_constants.pb.h"
#include "missive/storage/storage_module_interface.h"
#include "missive/util/status.h"
#include "missive/util/test_support_callbacks.h"

namespace reporting {
namespace {

using ::testing::_;
using ::testing::Eq;
using ::testing::Invoke;
using ::testing::NotNull;
using ::testing::WithArgs;

MATCHER_P(EqualsProto,
          message,
          "Match a proto Message equal to the matcher's argument.") {
  std::string expected_serialized, actual_serialized;
  message.SerializeToString(&expected_serialized);
  arg.SerializeToString(&actual_serialized);
  return expected_serialized == actual_serialized;
}

class MockStorageModule : public StorageModuleInterface {
 public:
  static scoped_refptr<MockStorageModule> Create() {
    return base::WrapRefCounted(new MockStorageModule());
  }

  MOCK_METHOD(void,
              AddRecord,
              (Priority, Record, base::OnceCallback<void(Status)>),
              (override));
  MOCK_METHOD(void,
              Flush,
              (Priority, base::OnceCallback<void(Status)>),
              (override));
  MOCK_METHOD(void, ReportSuccess, (SequencingInformation, bool), (override));
  MOCK_METHOD(void, UpdateEncryptionKey, (SignedEncryptionInfo), (override));
};

class EnqueueJobTest : public ::testing::Test {
 public:
  EnqueueJobTest() : method_call_("org.Test", "TestMethod") {}

 protected:
  void SetUp() override {
    response_ = std::make_unique<
        brillo::dbus_utils::MockDBusMethodResponse<EnqueueRecordResponse>>();

    record_.set_data("TEST_VALUE");
    record_.set_destination(Destination::UPLOAD_EVENTS);
    record_.set_dm_token("TEST_DM_TOKEN");
    record_.set_timestamp_us(1234567);

    storage_module_ = MockStorageModule::Create();
  }

  void TearDown() override {
    // Let everything ongoing to finish.
    task_environment_.RunUntilIdle();
  }

  base::test::TaskEnvironment task_environment_;

  dbus::MethodCall method_call_;

  std::unique_ptr<
      brillo::dbus_utils::MockDBusMethodResponse<EnqueueRecordResponse>>
      response_;
  Record record_;

  scoped_refptr<MockStorageModule> storage_module_;
};

TEST_F(EnqueueJobTest, CompletesSuccessfully) {
  response_->set_return_callback(
      base::BindRepeating([](const EnqueueRecordResponse& response) {
        EXPECT_EQ(response.status().code(), error::OK);
      }));
  auto delegate = std::make_unique<EnqueueJob::EnqueueResponseDelegate>(
      std::move(response_));

  EnqueueRecordRequest request;
  *request.mutable_record() = record_;
  request.set_priority(Priority::BACKGROUND_BATCH);

  EXPECT_CALL(*storage_module_, AddRecord(Eq(Priority::BACKGROUND_BATCH),
                                          EqualsProto(record_), _))
      .WillOnce(WithArgs<2>(Invoke([](base::OnceCallback<void(Status)> cb) {
        std::move(cb).Run(Status::StatusOK());
      })));

  auto job = EnqueueJob::Create(storage_module_, request, std::move(delegate));

  test::TestEvent<Status> enqueued;
  job->Start(enqueued.cb());
  const Status status = enqueued.result();
  EXPECT_OK(status) << status;
}

TEST_F(EnqueueJobTest, CancelsSuccessfully) {
  Status failure_status(error::INTERNAL, "Failing for tests");
  response_->set_return_callback(base::BindRepeating(
      [](Status status, const EnqueueRecordResponse& response) {
        EXPECT_TRUE(response.status().code() == status.error_code());
      },
      failure_status));
  auto delegate = std::make_unique<EnqueueJob::EnqueueResponseDelegate>(
      std::move(response_));

  EnqueueRecordRequest request;
  *request.mutable_record() = std::move(record_);
  request.set_priority(Priority::BACKGROUND_BATCH);

  auto job = EnqueueJob::Create(storage_module_, request, std::move(delegate));

  auto status = job->Cancel(failure_status);
  EXPECT_TRUE(status.ok());
}

}  // namespace
}  // namespace reporting