//
// Copyright © 2017 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//
#pragma once

#include "WorkloadTestUtils.hpp"

#include <armnn/Types.hpp>
#include <backendsCommon/CpuTensorHandle.hpp>
#include <backendsCommon/IBackendInternal.hpp>
#include <backendsCommon/WorkloadFactory.hpp>

template <armnn::DataType ArmnnType, typename T = armnn::ResolveType<ArmnnType>,
    unsigned int paramsDim, unsigned int indicesDim, unsigned int OutputDim>
LayerTestResult<T, OutputDim> GatherTestImpl(
    armnn::IWorkloadFactory& workloadFactory,
    const armnn::IBackendInternal::IMemoryManagerSharedPtr& memoryManager,
    const armnn::TensorInfo& paramsInfo,
    const armnn::TensorInfo& indicesInfo,
    const armnn::TensorInfo& outputInfo,
    const std::vector<T>& paramsData,
    const std::vector<int32_t>& indicesData,
    const std::vector<T>& outputData)
{
    auto params = MakeTensor<T, paramsDim>(paramsInfo, paramsData);
    auto indices = MakeTensor<int32_t, indicesDim>(indicesInfo, indicesData);

    LayerTestResult<T, OutputDim> result(outputInfo);
    result.outputExpected = MakeTensor<T, OutputDim>(outputInfo, outputData);

    std::unique_ptr<armnn::ITensorHandle> paramsHandle = workloadFactory.CreateTensorHandle(paramsInfo);
    std::unique_ptr<armnn::ITensorHandle> indicesHandle = workloadFactory.CreateTensorHandle(indicesInfo);
    std::unique_ptr<armnn::ITensorHandle> outputHandle = workloadFactory.CreateTensorHandle(outputInfo);

    armnn::GatherQueueDescriptor data;
    armnn::WorkloadInfo info;
    AddInputToWorkload(data,  info, paramsInfo, paramsHandle.get());
    AddInputToWorkload(data, info, indicesInfo, indicesHandle.get());
    AddOutputToWorkload(data, info, outputInfo, outputHandle.get());

    std::unique_ptr<armnn::IWorkload> workload = workloadFactory.CreateGather(data, info);

    paramsHandle->Allocate();
    indicesHandle->Allocate();
    outputHandle->Allocate();

    CopyDataToITensorHandle(paramsHandle.get(), params.origin());
    CopyDataToITensorHandle(indicesHandle.get(), indices.origin());

    workload->Execute();

    CopyDataFromITensorHandle(result.output.origin(), outputHandle.get());

    return result;
}

template <armnn::DataType ArmnnType, typename T = armnn::ResolveType<ArmnnType>>
LayerTestResult<T, 1> Gather1DParamsTestImpl(armnn::IWorkloadFactory& workloadFactory,
                                             const armnn::IBackendInternal::IMemoryManagerSharedPtr& memoryManager)
{
    armnn::TensorInfo paramsInfo({ 8 }, ArmnnType);
    armnn::TensorInfo indicesInfo({ 4 }, armnn::DataType::Signed32);
    armnn::TensorInfo outputInfo({ 4 }, ArmnnType);

    const std::vector<T> params = std::vector<T>({ 1, 2, 3, 4, 5, 6, 7, 8 });
    const std::vector<int32_t> indices = std::vector<int32_t>({ 0, 2, 1, 5 });
    const std::vector<T> expectedOutput = std::vector<T>({ 1, 3, 2, 6 });

    return GatherTestImpl<ArmnnType, T, 1, 1, 1>(workloadFactory, memoryManager,
                                                 paramsInfo, indicesInfo, outputInfo,
                                                 params,indices, expectedOutput);
}

template <armnn::DataType ArmnnType, typename T = armnn::ResolveType<ArmnnType>>
LayerTestResult<T, 2> GatherMultiDimParamsTestImpl(
    armnn::IWorkloadFactory& workloadFactory, const armnn::IBackendInternal::IMemoryManagerSharedPtr& memoryManager)
{
    armnn::TensorInfo paramsInfo({ 5, 2 }, ArmnnType);
    armnn::TensorInfo indicesInfo({ 3 }, armnn::DataType::Signed32);
    armnn::TensorInfo outputInfo({ 3, 2 }, ArmnnType);

    const std::vector<T> params = std::vector<T>({ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 });
    const std::vector<int32_t> indices = std::vector<int32_t>({ 1, 3, 4 });
    const std::vector<T> expectedOutput = std::vector<T>({ 3, 4, 7, 8, 9, 10 });

    return GatherTestImpl<ArmnnType, T, 2, 1, 2>(workloadFactory, memoryManager,
                                                 paramsInfo, indicesInfo, outputInfo,
                                                 params,indices, expectedOutput);
}

template <armnn::DataType ArmnnType, typename T = armnn::ResolveType<ArmnnType>>
LayerTestResult<T, 4> GatherMultiDimParamsMultiDimIndicesTestImpl(
    armnn::IWorkloadFactory& workloadFactory, const armnn::IBackendInternal::IMemoryManagerSharedPtr& memoryManager)
{
    armnn::TensorInfo paramsInfo({ 3, 2, 3}, ArmnnType);
    armnn::TensorInfo indicesInfo({ 2, 3 }, armnn::DataType::Signed32);
    armnn::TensorInfo outputInfo({ 2, 3, 2, 3 }, ArmnnType);

    const std::vector<T> params = std::vector<T>({
         1,  2,  3,
         4,  5,  6,

         7,  8,  9,
        10, 11, 12,

        13, 14, 15,
        16, 17, 18 });
    const std::vector<int32_t> indices = std::vector<int32_t>({ 1, 2, 1, 2, 1, 0 });
    const std::vector<T> expectedOutput = std::vector<T>({
         7,  8,  9,
        10, 11, 12,
        13, 14, 15,
        16, 17, 18,
         7,  8,  9,
        10, 11, 12,

        13, 14, 15,
        16, 17, 18,
         7,  8,  9,
        10, 11, 12,
         1,  2,  3,
         4,  5,  6 });

    return GatherTestImpl<ArmnnType, T, 3, 2, 4>(workloadFactory, memoryManager,
                                                 paramsInfo, indicesInfo, outputInfo,
                                                 params,indices, expectedOutput);
}