/*
// 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 "lstm_elt_kernel_base.h"
#include "kernel_selector_utils.h"
#include "common_tools.h"

namespace kernel_selector
{
    JitConstants LSTMEltKernelBase::GetJitConstants(const lstm_elt_params& params) const
    {
        JitConstants jit = MakeBaseParamsJitConstants(params);

        if (params.has_cell) {
            const auto& cell = params.cell;
            jit.AddConstants({
                MakeJitConstant("CELL_TERM", true),
                MakeJitConstant("CELL", cell),
                MakeJitConstant("CELL_DIRECTION", params.cell_direction)
            });
        }
        if (params.clip > 0) {
            std::string psclip = toCodeString(params.clip);
            std::string nsclip = toCodeString(-params.clip);
            jit.AddConstants({ MakeJitConstant("CLIP(x)", "((x > " + psclip + ") ? " +
                psclip + ": (x < " + nsclip + ") ? " + nsclip + " : (x))") });
        }
        else {
            jit.AddConstants({ MakeJitConstant("CLIP(x)", "(x)") });
        }
        if (params.input_forget) {
            jit.AddConstants({ MakeJitConstant("INPUT_FORGET", true) });
        }
        jit.AddConstants({ MakeJitConstant("DIRECTION", params.direction) });

        const auto& GEMMInput = params.inputs[0];
        size_t size = GEMMInput.X().v / 4;
        jit.AddConstants({
            MakeJitConstant("GEMM_OFFSET_I", params.GetOffsetIndexI() * size),
            MakeJitConstant("GEMM_OFFSET_O", params.GetOffsetIndexO() * size),
            MakeJitConstant("GEMM_OFFSET_F", params.GetOffsetIndexF() * size),
            MakeJitConstant("GEMM_OFFSET_Z", params.GetOffsetIndexZ() * size),
        });
        return jit;
    }

    KernelsData LSTMEltKernelBase::GetCommonKernelsData(const Params& params, const optional_params& options) const
    {
        if (!Validate(params, options))
        {
            return{};
        }

        const lstm_elt_params& orgParams = static_cast<const lstm_elt_params&>(params);

        KernelData kd = KernelData::Default<lstm_elt_params>(params, orgParams.inputs.size());

        float effiency = FORCE_PRIORITY_1;
        const auto& input = orgParams.inputs[0];

        auto newParams = orgParams;
        newParams.inputs.resize(1);
        newParams.inputs[0] = input;
        auto out = newParams.output;

        auto& kernel = kd.kernels[0];
        auto cldnnJit = GetJitConstants(newParams);
        auto entryPoint = GetEntryPoint(kernelName, newParams.layerID, options);
        auto jit = CreateJit(kernelName, cldnnJit, entryPoint);

        kernel.workGroups.global = { out.X().v, out.Batch().v, 1 };
        kernel.kernelString = GetKernelString(kernelName, jit, entryPoint, params.engineInfo);
        kernel.arguments.push_back({ ArgumentDescriptor::Types::INPUT, 0 });
        kernel.arguments.push_back({ ArgumentDescriptor::Types::OUTPUT, 0 });
        if (orgParams.has_cell) {
            kernel.arguments.push_back({ ArgumentDescriptor::Types::CELL, 0 });
        }

        kd.estimatedTime = effiency;

        return{ kd };
    }
}