#include <iostream>

#include "gtest/gtest.h"

#include "ovtAssert.h"

#include "../common/ovtKernelContext.h"
#include <openvibe/ov_all.h>

#include <ovp_global_defines.h>

namespace {
const char* kernelConfig = nullptr;

class StreamedMatrixTest : public testing::Test
{
protected:

	StreamedMatrixTest() { }
	~StreamedMatrixTest() override { }

	void SetUp() override
	{
		m_kernelCtx.initialize();
		m_kernelCtx->getPluginManager().addPluginsFromFiles(m_kernelCtx->getConfigurationManager().expand("${Path_Lib}/*openvibe-plugins-sdk-stream-codecs*"));

		m_decoderId = OpenViBE::CIdentifier::undefined();
		m_decoderId = m_kernelCtx->getAlgorithmManager().createAlgorithm(OVP_GD_ClassId_Algorithm_StreamedMatrixDecoder);
		ASSERT_NE(OpenViBE::CIdentifier::undefined(), m_decoderId);

		m_encoderId = OpenViBE::CIdentifier::undefined();
		m_encoderId = m_kernelCtx->getAlgorithmManager().createAlgorithm(OVP_GD_ClassId_Algorithm_StreamedMatrixEncoder);
		ASSERT_NE(OpenViBE::CIdentifier::undefined(), m_encoderId);
	}

	void TearDown() override
	{
		ASSERT_TRUE(m_kernelCtx->getAlgorithmManager().releaseAlgorithm(m_decoderId));
		m_decoderId = OpenViBE::CIdentifier::undefined();
		ASSERT_TRUE(m_kernelCtx->getAlgorithmManager().releaseAlgorithm(m_encoderId));
		m_encoderId = OpenViBE::CIdentifier::undefined();
		m_kernelCtx.uninitialize();
	}

	OpenViBE::CIdentifier m_decoderId;
	OpenViBE::CIdentifier m_encoderId;
	OpenViBE::Test::ctx m_kernelCtx;
};

TEST_F(StreamedMatrixTest, test_init)
{
	auto& decoder = m_kernelCtx->getAlgorithmManager().getAlgorithm(m_decoderId);
	auto& encoder = m_kernelCtx->getAlgorithmManager().getAlgorithm(m_encoderId);
	EXPECT_TRUE(decoder.initialize());
	EXPECT_TRUE(encoder.initialize());
	EXPECT_TRUE(decoder.uninitialize());
	EXPECT_TRUE(encoder.uninitialize());
}

TEST_F(StreamedMatrixTest, matrix_decoder_does_not_crash_when_given_an_empty_matrix)
{
	auto& encoder = m_kernelCtx->getAlgorithmManager().getAlgorithm(m_encoderId);
	auto& decoder = m_kernelCtx->getAlgorithmManager().getAlgorithm(m_decoderId);
	EXPECT_TRUE(encoder.initialize());
	EXPECT_TRUE(decoder.initialize());
	OpenViBE::CMatrix mat(0);

	OpenViBE::Kernel::TParameterHandler<const OpenViBE::CMatrix*> iMatrix(
		encoder.getInputParameter(OVP_GD_Algorithm_StreamedMatrixEncoder_InputParameterId_Matrix));
	OpenViBE::Kernel::TParameterHandler<const OpenViBE::IMemoryBuffer*> oBuffer(
		encoder.getOutputParameter(OVP_GD_Algorithm_StreamedMatrixEncoder_OutputParameterId_EncodedMemoryBuffer));
	OpenViBE::Kernel::TParameterHandler<const OpenViBE::IMemoryBuffer*> iBuffer(
		decoder.getInputParameter(OVP_GD_Algorithm_StreamedMatrixDecoder_InputParameterId_MemoryBufferToDecode));
	OpenViBE::Kernel::TParameterHandler<const OpenViBE::CMatrix*> oMatrix(
		decoder.getOutputParameter(OVP_GD_Algorithm_StreamedMatrixDecoder_OutputParameterId_Matrix));

	iMatrix = &mat;
	iBuffer.setReferenceTarget(oBuffer);

	encoder.process(OVP_GD_Algorithm_StreamedMatrixEncoder_InputTriggerId_EncodeHeader);
	decoder.process();

	EXPECT_TRUE(decoder.isOutputTriggerActive(OVP_GD_Algorithm_StreamedMatrixDecoder_OutputTriggerId_ReceivedHeader));

	EXPECT_EQ(mat.getDimensionCount(), oMatrix->getDimensionCount());

	EXPECT_TRUE(encoder.uninitialize());
	EXPECT_TRUE(decoder.uninitialize());
}

TEST_F(StreamedMatrixTest, matrix_encoded_and_then_decoded_is_identical_to_original)
{
	auto& encoder = m_kernelCtx->getAlgorithmManager().getAlgorithm(m_encoderId);
	auto& decoder = m_kernelCtx->getAlgorithmManager().getAlgorithm(m_decoderId);
	EXPECT_TRUE(encoder.initialize());
	EXPECT_TRUE(decoder.initialize());
	OpenViBE::CMatrix mat(2, 3);
	size_t elemCount = 1;
	for (size_t dim = 0; dim < mat.getDimensionCount(); ++dim)
	{
		const auto size = mat.getDimensionSize(dim);
		for (size_t entry = 0; entry < size; ++entry)
		{
			std::string label = std::to_string(dim) + ":" + std::to_string(entry);
			mat.setDimensionLabel(0, 0, label.c_str());
		}
		elemCount *= size;
	}
	for (size_t i = 0; i < elemCount; ++i) { mat.getBuffer()[i] = double(i); }

	OpenViBE::Kernel::TParameterHandler<const OpenViBE::CMatrix*> iMatrix(
		encoder.getInputParameter(OVP_GD_Algorithm_StreamedMatrixEncoder_InputParameterId_Matrix));
	OpenViBE::Kernel::TParameterHandler<const OpenViBE::IMemoryBuffer*> oBuffer(
		encoder.getOutputParameter(OVP_GD_Algorithm_StreamedMatrixEncoder_OutputParameterId_EncodedMemoryBuffer));
	OpenViBE::Kernel::TParameterHandler<const OpenViBE::IMemoryBuffer*> iBuffer(
		decoder.getInputParameter(OVP_GD_Algorithm_StreamedMatrixDecoder_InputParameterId_MemoryBufferToDecode));
	OpenViBE::Kernel::TParameterHandler<const OpenViBE::CMatrix*> oMatrix(
		decoder.getOutputParameter(OVP_GD_Algorithm_StreamedMatrixDecoder_OutputParameterId_Matrix));

	iMatrix = &mat;
	iBuffer.setReferenceTarget(oBuffer);

	encoder.process(OVP_GD_Algorithm_StreamedMatrixEncoder_InputTriggerId_EncodeHeader);
	decoder.process();

	EXPECT_TRUE(decoder.isOutputTriggerActive(OVP_GD_Algorithm_StreamedMatrixDecoder_OutputTriggerId_ReceivedHeader));

	EXPECT_EQ(mat.getDimensionCount(), oMatrix->getDimensionCount());

	EXPECT_TRUE(encoder.uninitialize());
	EXPECT_TRUE(decoder.uninitialize());
}
}	// namespace

int uoStreamedMatrixTest(int argc, char* argv[])
{
	if (argc > 1) { kernelConfig = argv[1]; }
	testing::InitGoogleTest(&argc, argv);
	::testing::GTEST_FLAG(filter) = "StreamedMatrixTest.*";
	return RUN_ALL_TESTS();
}