// Copyright (c) 2020 by Robert Bosch GmbH. All rights reserved.
// Copyright (c) 2021 by Apex.AI Inc. All rights reserved.
//
// 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.
//
// SPDX-License-Identifier: Apache-2.0

#include "iceoryx_dds/Mempool.hpp"
#include "iceoryx_dds/dds/cyclone_data_reader.hpp"
#include "iceoryx_posh/testing/mocks/chunk_mock.hpp"
#include "test.hpp"

#include <dds/dds.hpp>

namespace
{
using namespace ::testing;
using ::testing::_;
using namespace iox::dds;

// ======================================== Helpers ======================================== //
using TestDataReader = CycloneDataReader;

struct DummyPayload
{
    uint64_t a;
    uint64_t b;
    uint64_t c;
};
struct DummyUserHeader
{
    uint64_t a;
};

// ======================================== Fixture ======================================== //
class CycloneDataReaderTest : public Test
{
  public:
    void SetUp(){};
    void TearDown(){};
};

// ======================================== Tests ======================================== //
TEST_F(CycloneDataReaderTest, DoesNotAttemptToReadWhenDisconnected)
{
    ::testing::Test::RecordProperty("TEST_ID", "46fc99d7-9f7b-4b77-94c7-06778e3461f7");
    // ===== Setup
    ChunkMock<DummyPayload> chunkMock;
    iox::dds::IoxChunkDatagramHeader datagramHeader;
    datagramHeader.endianness = getEndianess();
    datagramHeader.userPayloadSize = chunkMock.chunkHeader()->userPayloadSize();
    datagramHeader.userPayloadAlignment = chunkMock.chunkHeader()->userPayloadAlignment();

    // ===== Test
    TestDataReader reader{"", "", ""};

    auto takeNextResult = reader.takeNext(datagramHeader,
                                          static_cast<uint8_t*>(chunkMock.chunkHeader()->userHeader()),
                                          static_cast<uint8_t*>(chunkMock.chunkHeader()->userPayload()));
    ASSERT_EQ(true, takeNextResult.has_error());
    EXPECT_EQ(iox::dds::DataReaderError::NOT_CONNECTED, takeNextResult.get_error());
}

TEST_F(CycloneDataReaderTest, ReturnsErrorWhenAttemptingToReadIntoANullBuffer)
{
    ::testing::Test::RecordProperty("TEST_ID", "ddd6e55a-b4ca-4e10-838e-5a532ccadb50");
    // ===== Setup
    ChunkMock<DummyPayload, DummyUserHeader> chunkMock;
    iox::dds::IoxChunkDatagramHeader datagramHeader;
    datagramHeader.endianness = getEndianess();
    datagramHeader.userHeaderId = iox::mepoo::ChunkHeader::UNKNOWN_USER_HEADER;
    datagramHeader.userHeaderSize = chunkMock.chunkHeader()->userHeaderSize();
    datagramHeader.userPayloadSize = chunkMock.chunkHeader()->userPayloadSize();
    datagramHeader.userPayloadAlignment = chunkMock.chunkHeader()->userPayloadAlignment();

    // ===== Test
    TestDataReader reader{"", "", ""};
    reader.connect();

    auto takeNextResult1 =
        reader.takeNext(datagramHeader, nullptr, static_cast<uint8_t*>(chunkMock.chunkHeader()->userPayload()));
    ASSERT_EQ(true, takeNextResult1.has_error());
    EXPECT_EQ(iox::dds::DataReaderError::INVALID_BUFFER_PARAMETER_FOR_USER_HEADER, takeNextResult1.get_error());

    auto takeNextResult2 =
        reader.takeNext(datagramHeader, static_cast<uint8_t*>(chunkMock.chunkHeader()->userHeader()), nullptr);
    ASSERT_EQ(true, takeNextResult2.has_error());
    EXPECT_EQ(iox::dds::DataReaderError::INVALID_BUFFER_PARAMETER_FOR_USER_PAYLOAD, takeNextResult2.get_error());
}

} // namespace