/*
// Copyright (c) 2018 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.
*/

#pragma once

#include "common_kernel_base.h"
#include "kernel_selector_params.h"

namespace kernel_selector
{
    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    // lstm_gemm_params
    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    struct lstm_gemm_params : public base_params
    {
        lstm_gemm_params() : base_params(KernelType::LSTM_GEMM) {}

        DataTensor weights;
        DataTensor recurrent;
        DataTensor bias;
        DataTensor hidden;
        bool hasBias = false;
        bool hasHidden = false;
        uint32_t direction = 0;
        uint32_t input_direction = 0; // for bidirectional node fusion in stacked LSTMs
        uint32_t hidden_direction = 0;

        void SetBias(const DataTensor& v) {
            bias = v;
            hasBias = true;
        }

        void SetHidden(const DataTensor& v) {
            hidden = v;
            hasHidden = true;
        }

        virtual ParamsKey GetParamsKey() const override
        {
            ParamsKey k = base_params::GetParamsKey();

            if (hasBias)
            {
                k.EnableLSTMGEMMBias();
            }

            if (hasHidden)
            {
                k.EnableLSTMGEMMHidden();
            }

            return k;
        }
    };

    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    // lstm_gemm_optional_params
    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    struct lstm_gemm_optional_params : optional_params
    {
        lstm_gemm_optional_params() : optional_params(KernelType::LSTM_GEMM) {}
    };

    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    // LSTMGemmKernelBase
    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    class LSTMGemmKernelBase : public common_kernel_base
    {
    public:
		using common_kernel_base::common_kernel_base;
        virtual ~LSTMGemmKernelBase() {}

        struct DispatchData : public CommonDispatchData
        {};

    protected:
        virtual JitConstants GetJitConstants(const lstm_gemm_params& params) const;
        KernelsData GetCommonKernelsData(const Params& params, const optional_params& optParams) const;

        bool Validate(const Params& p, const optional_params&) const override
        {
            if (p.GetType() != KernelType::LSTM_GEMM)
            {
                return false;
            }

            return true;
        }
    };
}