/*************************************************************************
 * Copyright (c) 2019-2020 Advanced Micro Devices, Inc. All rights reserved.
 *
 * See LICENSE.txt for license information
 ************************************************************************/
#include "test_GroupCalls.hpp"

#include "test_AllGather.hpp"
#include "test_AllReduce.hpp"
#include "test_Broadcast.hpp"
#include "test_Reduce.hpp"
#include "test_ReduceScatter.hpp"

namespace CorrectnessTests
{
    TEST_P(GroupCallsCorrectnessTest, Correctness)
    {
        if (numDevices > numDevicesAvailable) return;

        // Create multiple datasets for group operation
        std::vector<Dataset> datasets(5);
        for (int i = 0; i < datasets.size(); i++)
        {
            datasets[i].Initialize(numDevices, numElements, dataType, inPlace);
            FillDatasetWithPattern(datasets[i]);
        }

        // Compute expected results for each dataset in group
        int const root = 0;
        AllGatherCorrectnessTest::ComputeExpectedResults(datasets[0]);
        AllReduceCorrectnessTest::ComputeExpectedResults(datasets[1], op);
        BroadcastCorrectnessTest::ComputeExpectedResults(datasets[2], root);
        ReduceCorrectnessTest::ComputeExpectedResults(datasets[3], op, root);
        ReduceScatterCorrectnessTest::ComputeExpectedResults(datasets[4], op);

        // Start a group call
        ncclGroupStart();

        // AllGather
        size_t const byteCount = datasets[0].NumBytes() / numDevices;
        size_t const elemCount = numElements / numDevices;
        for (int i = 0; i < numDevices; i++)
        {
            ncclAllGather((int8_t *)datasets[0].inputs[i] + (i * byteCount),
                          datasets[0].outputs[i], elemCount,
                          dataType, comms[i], streams[i]);
        }

        // AllReduce
        for (int i = 0; i < numDevices; i++)
        {
            ncclAllReduce(datasets[1].inputs[i], datasets[1].outputs[i],
                          numElements, dataType, op, comms[i], streams[i]);
        }

        // Broadcast
        for (int i = 0; i < numDevices; i++)
        {
            ncclBroadcast(datasets[2].inputs[i],
                          datasets[2].outputs[i],
                          numElements, dataType,
                          root, comms[i], streams[i]);
        }

        // Reduce
        for (int i = 0; i < numDevices; i++)
        {
            ncclReduce(datasets[3].inputs[i],
                       datasets[3].outputs[i],
                       numElements, dataType, op,
                       root, comms[i], streams[i]);
        }

        // ReduceScatter
        for (int i = 0; i < numDevices; i++)
        {
            ncclReduceScatter(datasets[4].inputs[i],
                              (int8_t *)datasets[4].outputs[i] + (i * byteCount),
                              elemCount, dataType, op,
                              comms[i], streams[i]);
        }

        // Signal end of group call
        ncclGroupEnd();

        // Wait for reduction to complete
        Synchronize();

        // Check results for each collective in the group
        for (int i = 0; i < 5; i++)
        {
            ValidateResults(datasets[i]);
            datasets[i].Release();
        }
    }

    INSTANTIATE_TEST_CASE_P(GroupCallsCorrectnessSweep,
                            GroupCallsCorrectnessTest,
                            testing::Combine(
                                // Reduction operator (not used)
                                testing::Values(ncclSum),
                                // Data types
                                testing::Values(ncclInt8,
                                                ncclUint8,
                                                ncclInt32,
                                                ncclUint32,
                                                ncclInt64,
                                                ncclUint64,
                                                //ncclFloat16,
                                                ncclFloat32,
                                                ncclFloat64,
                                                ncclBfloat16),
                                // Number of elements
                                testing::Values(3072, 3145728),
                                // Number of devices
                                testing::Values(2,3,4),
                                // In-place or not
                                testing::Values(false, true)));
} // namespace