/*
// Copyright (c) 2016 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
*/

#include "kernel_selector_common.h"
#include "reorder_kernel_base.h"
#include "common_tools.h"
#include "kernel_selector_utils.h" 

namespace kernel_selector 
{
    inline uint32_t SubGroupSize(WeightsLayout l)
    {
        switch (l)
        {
        case WeightsLayout::os_iyx_osv16:
        case WeightsLayout::os_iyx_osv16_rotate_180:
        case WeightsLayout::os_i_osv16:
        case WeightsLayout::os_i_osv16__ai8:
        case WeightsLayout::i_yxs_os_yxsv2_osv16:
        case WeightsLayout::iy_xs_os_xsv2_osv16__ao32:
            return 16;
        case WeightsLayout::os_i_osv8__ai8:
        case WeightsLayout::iy_xs_os_xsv2_osv8__ao32:
            return 8;
        default:
            return 1;
        }
    }

    inline uint32_t SubGroupSize(DataLayout l)
    {
        switch (l)
        {
        case DataLayout::bs_f_bsv16__af8:
            return 16;
        case DataLayout::bs_f_bsv8__af8:
            return 8;
        default:
            return 1;
        }
    }

    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    // MakeReorderWeightsJitConstants
    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    inline JitConstants MakeReorderWeightsJitConstants(const reorder_weights_params& params)
    {
        const auto& input = params.input;
        const auto& output = params.output;
        const bool fp16Supported = output.GetDType() == WeightsType::F16 || input.GetDType() == WeightsType::F16;

        JitConstants jit{
            MakeJitConstant("FP16_SUPPORTED",   fp16Supported),                      // TODO: use engine
            MakeJitConstant("FP16_UNIT_USED",   fp16Supported),
            MakeJitConstant("INPUT0",           input),
            MakeJitConstant("OUTPUT",           output),
        };

        if (fp16Supported)
        {
            jit.Merge(MakeUnitTypeJitConstants(Datatype::F16));
        }
        else
        {
            jit.Merge(MakeUnitTypeJitConstants(Datatype::F32));
        }
        return jit;
    }

    JitConstants ReorderKernelBase::GetJitConstants(const reorder_weights_params& params) const
    {
        JitConstants mem_consts = MakeReorderWeightsJitConstants(params);
       
        mem_consts.AddConstant(MakeJitConstant("SUB_GROUP_SIZE", SubGroupSize(params.output.GetLayout())));

        return mem_consts;
    }

    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    // MakeReorderJitConstants
    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    inline JitConstants MakeReorderJitConstants(const reorder_params& params)
    {
        JitConstants jit = MakeBaseParamsJitConstants(params);

        jit.AddConstant(MakeJitConstant("MEAN_SUBTRACT_" + toString(params.mode), 1));

        if (params.mode == MeanSubtractMode::INSIDE_PARAMS)
        {
            jit.AddConstant(MakeJitConstant("VALUE_TO_SUBTRACT", params.meanValues));
            jit.AddConstant(MakeJitConstant("TO_MEAN_TYPE", "convert_float"));
        }
        else if (params.mode == MeanSubtractMode::IN_BUFFER)
        {
            jit.AddConstant(MakeJitConstant("MEAN_SUBTRACT", params.mean));
            jit.AddConstant(MakeJitConstant("TO_MEAN_TYPE", "convert_" + toCLType(params.mean.GetDType())));
        }

        //half->half without subtraction (so plain reorder) can be done on shorts without explicit fp16 support
        bool useUshort = (params.inputs[0].GetDType() == Datatype::F16 && params.output.GetDType() == Datatype::F16 &&
            params.mode == MeanSubtractMode::NONE);

        Datatype calc_type = useUshort ? Datatype::UINT16 : params.inputs[0].GetDType();

        jit.AddConstants({
            MakeJitConstant("CALC_TYPE",                      toCLType(calc_type)),
            MakeJitConstant("TO_CALC_TYPE",      "convert_" + toCLType(calc_type)),
            MakeJitConstant("INPUT_REORDER_TYPE",             useUshort ? toCLType(Datatype::UINT16) : "INPUT0_TYPE"),
            MakeJitConstant("OUTPUT_REORDER_TYPE",            useUshort ? toCLType(Datatype::UINT16) : "OUTPUT_TYPE"),
            MakeJitConstant("TO_OUTPUT_REORDER_TYPE",         useUshort ? "" : "TO_OUTPUT_TYPE"),
            MakeJitConstant("MEAN_OP(val,mean_val)",          getMeanOpString(params.mean_op))
        });

        return jit;
    }

    JitConstants ReorderKernelBase::GetJitConstants(const reorder_params& params) const
    {
        JitConstants mem_consts = MakeReorderJitConstants(params);

        mem_consts.AddConstant(MakeJitConstant("SUB_GROUP_SIZE", SubGroupSize(params.output.GetLayout())));

        return mem_consts;
    }

    ReorderKernelBase::DispatchData ReorderKernelBase::SetDefault(const reorder_weights_params& params) const
    {
        const auto& out = params.output;

        DispatchData kd;

        std::vector<size_t> global(3);

        global = { out.OFM().v, out.IFM().v, out.X().v*out.Y().v };
        auto local = GetOptimalLocalWorkGroupSizes(global);

        kd.gws0 = global[0];
        kd.gws1 = global[1];
        kd.gws2 = global[2];

        kd.lws0 = local[0];
        kd.lws1 = local[1];
        kd.lws2 = local[2];

        return kd;
    }

    ReorderKernelBase::DispatchData ReorderKernelBase::SetDefault(const reorder_params& params) const
    {
        DispatchData kd;

        auto global = GetTensorFriendlyWorkGroups(params.inputs[0]);
        auto local = GetOptimalLocalWorkGroupSizes(global);

        kd.gws0 = global[0];
        kd.gws1 = global[1];
        kd.gws2 = global[2];

        kd.lws0 = local[0];
        kd.lws1 = local[1];
        kd.lws2 = local[2];

        return kd;
    }

    KernelsData ReorderKernelBase::GetCommonKernelsData(const reorder_weights_params& params, const optional_params& options, float estimated_time) const
    {
        assert(params.GetType() == KernelType::REORDER);

        KernelData kd = KernelData::Default<reorder_weights_params>(params);
        reorder_weights_params& newParams = *static_cast<reorder_weights_params*>(kd.params.get());

        DispatchData runInfo;

        runInfo = SetDefault(newParams);

        auto entry_point = GetEntryPoint(kernelName, newParams.layerID, options);
        auto cldnn_jit = GetJitConstants(newParams);
        std::string jit = CreateJit(kernelName, cldnn_jit, entry_point);

        auto& kernel = kd.kernels[0];
        
        FillCLKernelData(kernel, runInfo, params.engineInfo, kernelName, jit, entry_point);

        kernel.arguments = GetArgsDesc(1, false, false);

        kd.estimatedTime = estimated_time;

        return{ kd };
    }

    KernelsData ReorderKernelBase::GetCommonKernelsData(const reorder_params& params, const optional_params& options, float estimated_time) const
    {
        if (!Validate(params, options))
        {
            return{};
        }
        assert(params.GetType() == KernelType::REORDER);

        KernelData kd = KernelData::Default<reorder_params>(params);
        reorder_params& newParams = *static_cast<reorder_params*>(kd.params.get());

        DispatchData runInfo;

        runInfo = SetDefault(newParams);

        auto entry_point = GetEntryPoint(kernelName, newParams.layerID, options);
        auto cldnn_jit = GetJitConstants(newParams);
        std::string jit = CreateJit(kernelName, cldnn_jit, entry_point);

        auto& kernel = kd.kernels[0];

        FillCLKernelData(kernel, runInfo, params.engineInfo, kernelName, jit, entry_point);

        kernel.arguments = GetArgsDesc(1, false, false);
        if (newParams.mode == MeanSubtractMode::IN_BUFFER)
        {
            kernel.arguments.push_back({ ArgumentDescriptor::Types::BIAS, 0 });
        }

        kd.estimatedTime = estimated_time;

        return{ kd };
    }
}