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/*! \internal \file
 * \brief
 * Tests for DevicesManager
 *
 * \author Artem Zhmurov <zhmurov@gmail.com>
 * \ingroup module_hardware
 */
#include "gmxpre.h"

#include "gromacs/hardware/device_management.h"

#include "config.h"

#include <algorithm>

#include <gtest/gtest.h>

#include "gromacs/hardware/device_information.h"
#include "gromacs/utility/inmemoryserializer.h"
#include "gromacs/utility/stringutil.h"

namespace
{

TEST(DevicesManagerTest, Serialization)
{
    if (canPerformDeviceDetection(nullptr) && c_canSerializeDeviceInformation)
    {
        std::vector<std::unique_ptr<DeviceInformation>> deviceInfoListIn = findDevices();
        gmx::InMemorySerializer                         writer;
        serializeDeviceInformations(deviceInfoListIn, &writer);
        auto buffer = writer.finishAndGetBuffer();

        gmx::InMemoryDeserializer                       reader(buffer, false);
        std::vector<std::unique_ptr<DeviceInformation>> deviceInfoListOut =
                deserializeDeviceInformations(&reader);

        EXPECT_EQ(deviceInfoListOut.size(), deviceInfoListIn.size())
                << "Number of accessible devices changed after serialization/deserialization.";

        for (int deviceId = 0; deviceId < static_cast<int>(deviceInfoListIn.size()); deviceId++)
        {
            EXPECT_FALSE(deviceInfoListIn[deviceId] == nullptr) << gmx::formatString(
                    "Device #%d information is nullptr before serialization.", deviceId);
            EXPECT_FALSE(deviceInfoListOut[deviceId] == nullptr) << gmx::formatString(
                    "Device #%d information is nullptr after serialization.", deviceId);

            const DeviceInformation& deviceInfoIn  = *deviceInfoListIn[deviceId];
            const DeviceInformation& deviceInfoOut = *deviceInfoListOut[deviceId];
            EXPECT_EQ(deviceInfoIn.status, deviceInfoOut.status) << gmx::formatString(
                    "Device status changed after serialization/deserialization for device #%d.", deviceId);

            EXPECT_EQ(deviceInfoIn.id, deviceInfoOut.id) << gmx::formatString(
                    "Device id changed after serialization/deserialization for device #%d.", deviceId);

#if GMX_GPU_OPENCL
            EXPECT_EQ(deviceInfoIn.oclPlatformId, deviceInfoOut.oclPlatformId) << gmx::formatString(
                    "Device OpenCL platform ID changed after serialization/deserialization for "
                    "device "
                    "#%d.",
                    deviceId);

#endif // GMX_GPU_OPENCL
        }
    }
}

} // namespace
