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/*! \internal \file
 * \brief
 * This implements basic nblib utility tests
 *
 * \author Victor Holanda <victor.holanda@cscs.ch>
 * \author Joe Jordan <ejjordan@kth.se>
 * \author Prashanth Kanduri <kanduri@cscs.ch>
 * \author Sebastian Keller <keller@cscs.ch>
 */
#include "listed_forces/transformations.h"

#include <numeric>

#include <gtest/gtest.h>

#include "listed_forces/traits.h"

#include "testutils/refdata.h"
#include "testutils/testasserts.h"

namespace nblib
{
namespace test
{
namespace
{

ListedInteractionData unsortedInteractions()
{
    ListedInteractionData interactions;

    std::vector<InteractionIndex<HarmonicBondType>> bondIndices{ { 0, 2, 0 }, { 0, 1, 0 } };
    pickType<HarmonicBondType>(interactions).indices = std::move(bondIndices);

    std::vector<InteractionIndex<HarmonicAngle>> angleIndices{ { 0, 1, 2, 0 }, { 1, 0, 2, 0 } };
    pickType<HarmonicAngle>(interactions).indices = std::move(angleIndices);

    std::vector<InteractionIndex<ProperDihedral>> dihedralIndices{ { 0, 2, 1, 3, 0 }, { 0, 1, 2, 3, 0 } };
    pickType<ProperDihedral>(interactions).indices = std::move(dihedralIndices);

    return interactions;
}

TEST(ListedTransformations, SortInteractionIndices)
{
    ListedInteractionData interactions = unsortedInteractions();
    sortInteractions(interactions);

    std::vector<InteractionIndex<HarmonicBondType>> refBondIndices{ { 0, 1, 0 }, { 0, 2, 0 } };
    std::vector<InteractionIndex<HarmonicAngle>>  refAngleIndices{ { 1, 0, 2, 0 }, { 0, 1, 2, 0 } };
    std::vector<InteractionIndex<ProperDihedral>> refDihedralIndices{ { 0, 1, 2, 3, 0 },
                                                                      { 0, 2, 1, 3, 0 } };

    EXPECT_EQ(pickType<HarmonicBondType>(interactions).indices, refBondIndices);
    EXPECT_EQ(pickType<HarmonicAngle>(interactions).indices, refAngleIndices);
    EXPECT_EQ(pickType<ProperDihedral>(interactions).indices, refDihedralIndices);
}

} // namespace
} // namespace test
} // namespace nblib
