#include "gtest/gtest.h"
#include "src/storage/SparseMatrix.h"
#include "src/exceptions/InvalidStateException.h"
#include "src/exceptions/OutOfRangeException.h"

#include "storm-config.h"

#ifdef STORM_HAVE_CUDAFORSTORM

#include "cudaForStorm.h"

TEST(CudaPlugin, SpMV_4x4) {
    storm::storage::SparseMatrixBuilder<double> matrixBuilder(4, 4, 10);
    ASSERT_NO_THROW(matrixBuilder.addNextValue(0, 1, 1.0));
	ASSERT_NO_THROW(matrixBuilder.addNextValue(0, 3, -1.0));
	ASSERT_NO_THROW(matrixBuilder.addNextValue(1, 0, 8.0));
	ASSERT_NO_THROW(matrixBuilder.addNextValue(1, 1, 7.0));
	ASSERT_NO_THROW(matrixBuilder.addNextValue(1, 2, -5.0));
	ASSERT_NO_THROW(matrixBuilder.addNextValue(1, 3, 2.0));
	ASSERT_NO_THROW(matrixBuilder.addNextValue(2, 0, 2.0));
	ASSERT_NO_THROW(matrixBuilder.addNextValue(2, 1, 2.0));
	ASSERT_NO_THROW(matrixBuilder.addNextValue(2, 2, 4.0));
	ASSERT_NO_THROW(matrixBuilder.addNextValue(2, 3, 4.0));

    
    storm::storage::SparseMatrix<double> matrix;
    ASSERT_NO_THROW(matrix = matrixBuilder.build());
    
    ASSERT_EQ(4, matrix.getRowCount());
    ASSERT_EQ(4, matrix.getColumnCount());
    ASSERT_EQ(10, matrix.getEntryCount());

	std::vector<double> x({0, 4, 1, 1});
	std::vector<double> b({0, 0, 0, 0});

	ASSERT_NO_THROW(basicValueIteration_spmv_uint64_double(matrix.getColumnCount(), matrix.__internal_getRowIndications(), matrix.__internal_getColumnsAndValues(), x, b));

	ASSERT_EQ(b.at(0), 3);
	ASSERT_EQ(b.at(1), 25);
	ASSERT_EQ(b.at(2), 16);
	ASSERT_EQ(b.at(3), 0);
}

TEST(CudaPlugin, SpMV_VerySmall) {
	storm::storage::SparseMatrixBuilder<double> matrixBuilder(2, 2, 2);
	ASSERT_NO_THROW(matrixBuilder.addNextValue(0, 0, 1.0));
	ASSERT_NO_THROW(matrixBuilder.addNextValue(1, 1, 2.0));

	storm::storage::SparseMatrix<double> matrix;
	ASSERT_NO_THROW(matrix = matrixBuilder.build());

	ASSERT_EQ(2, matrix.getRowCount());
	ASSERT_EQ(2, matrix.getColumnCount());
	ASSERT_EQ(2, matrix.getEntryCount());

	std::vector<double> x({ 4.0, 8.0 });
	std::vector<double> b({ 0.0, 0.0 });

	ASSERT_NO_THROW(basicValueIteration_spmv_uint64_double(matrix.getColumnCount(), matrix.__internal_getRowIndications(), matrix.__internal_getColumnsAndValues(), x, b));

	ASSERT_EQ(b.at(0), 4.0);
	ASSERT_EQ(b.at(1), 16.0);
}

TEST(CudaPlugin, AddVectorsInplace) {
	std::vector<double> vectorA_1 = { 0.0, 42.0, 21.4, 3.1415, 1.0, 7.3490390, 94093053905390.21, -0.000000000023 };
	std::vector<double> vectorA_2 = { 0.0, 42.0, 21.4, 3.1415, 1.0, 7.3490390, 94093053905390.21, -0.000000000023 };
	std::vector<double> vectorA_3 = { 0.0, 42.0, 21.4, 3.1415, 1.0, 7.3490390, 94093053905390.21, -0.000000000023 };
	std::vector<double> vectorB = { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 };
	std::vector<double> vectorC = { -5000.0, -5000.0, -5000.0, -5000.0, -5000.0, -5000.0, -5000.0, -5000.0 };

	ASSERT_EQ(vectorA_1.size(), 8);
	ASSERT_EQ(vectorA_2.size(), 8);
	ASSERT_EQ(vectorA_3.size(), 8);
	ASSERT_EQ(vectorB.size(), 8);
	ASSERT_EQ(vectorC.size(), 8);

	ASSERT_NO_THROW(basicValueIteration_addVectorsInplace_double(vectorA_1, vectorB));
	ASSERT_NO_THROW(basicValueIteration_addVectorsInplace_double(vectorA_2, vectorC));

	ASSERT_EQ(vectorA_1.size(), 8);
	ASSERT_EQ(vectorA_2.size(), 8);
	ASSERT_EQ(vectorA_3.size(), 8);
	ASSERT_EQ(vectorB.size(), 8);
	ASSERT_EQ(vectorC.size(), 8);

	for (size_t i = 0; i < vectorA_3.size(); ++i) {
		double cpu_result_b = vectorA_3.at(i) + vectorB.at(i);
		double cpu_result_c = vectorA_3.at(i) + vectorC.at(i);

		ASSERT_EQ(cpu_result_b, vectorA_1.at(i));
		ASSERT_EQ(cpu_result_c, vectorA_2.at(i));
	}
}

TEST(CudaPlugin, ReduceGroupedVector) {
	std::vector<double> groupedVector = {
		0.0, -1000.0, 0.000004, // Group 0
		5.0,					// Group 1
		0.0, 1.0, 2.0, 3.0,		// Group 2
		-1000.0, -3.14, -0.0002,// Group 3 (neg only)
		25.25, 25.25, 25.25,	// Group 4
		0.0, 0.0, 1.0,			// Group 5
		-0.000001, 0.000001		// Group 6
	};
	std::vector<uint_fast64_t> grouping = {
		0, 3, 4, 8, 11, 14, 17, 19
	};

	std::vector<double> result_minimize = {
		-1000.0, // Group 0
		5.0,
		0.0,
		-1000.0,
		25.25,
		0.0,
		-0.000001
	};
	std::vector<double> result_maximize = {
		0.000004,
		5.0,
		3.0,
		-0.0002,
		25.25,
		1.0,
		0.000001
	};

	std::vector<double> result_cuda_minimize = { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 };
	std::vector<double> result_cuda_maximize = { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 };

	ASSERT_NO_THROW(basicValueIteration_reduceGroupedVector_uint64_double_minimize(groupedVector, grouping, result_cuda_minimize));
	ASSERT_NO_THROW(basicValueIteration_reduceGroupedVector_uint64_double_maximize(groupedVector, grouping, result_cuda_maximize));

	for (size_t i = 0; i < result_minimize.size(); ++i) {
		ASSERT_EQ(result_minimize.at(i), result_cuda_minimize.at(i));
		ASSERT_EQ(result_maximize.at(i), result_cuda_maximize.at(i));
	}
}

TEST(CudaPlugin, equalModuloPrecision) {
	std::vector<double> x = {
		123.45L, 67.8L, 901.23L, 456789.012L, 3.456789L, -4567890.12L
	};
	std::vector<double> y1 = {
		0.45L, 0.8L, 0.23L, 0.012L, 0.456789L, -0.12L
	};
	std::vector<double> y2 = {
		0.45L, 0.8L, 0.23L, 456789.012L, 0.456789L, -4567890.12L
	};
	std::vector<double> x2;
	std::vector<double> x3;
	std::vector<double> y3;
	std::vector<double> y4;
	x2.reserve(1000);
	x3.reserve(1000);
	y3.reserve(1000);
	y4.reserve(1000);
	for (size_t i = 0; i < 1000; ++i) {
		x2.push_back(static_cast<double>(i));
		y3.push_back(1.0);
		x3.push_back(-(1000.0 - static_cast<double>(i)));
		y4.push_back(1.0);
	}

	double maxElement1 = 0.0L;
	double maxElement2 = 0.0L;
	double maxElement3 = 0.0L;
	double maxElement4 = 0.0L;
	ASSERT_NO_THROW(basicValueIteration_equalModuloPrecision_double_NonRelative(x, y1, maxElement1));
	ASSERT_NO_THROW(basicValueIteration_equalModuloPrecision_double_NonRelative(x, y2, maxElement2));

	ASSERT_NO_THROW(basicValueIteration_equalModuloPrecision_double_Relative(x2, y3, maxElement3));
	ASSERT_NO_THROW(basicValueIteration_equalModuloPrecision_double_Relative(x3, y4, maxElement4));

	ASSERT_DOUBLE_EQ(4567890.0L, maxElement1);
	ASSERT_DOUBLE_EQ(901.0L, maxElement2);

	ASSERT_DOUBLE_EQ(998.0L, maxElement3);
	ASSERT_DOUBLE_EQ(1001.0L, maxElement4);
}

#endif