/********************************************************************************
 * Copyright (c) 2023 CEA-List
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 ********************************************************************************/

#ifndef __AIDGE_CPU_OPERATOR_FCIMPL_H__
#define __AIDGE_CPU_OPERATOR_FCIMPL_H__

#include "backend/OperatorImpl.hpp"
#include "operator/FC.hpp"
#include "utils/Registrar.hpp"
#include "utils/Types.h"
#include <memory>
#include <vector>
#include <array>

namespace Aidge {
// class FC_Op;

// compute kernel registry for forward and backward
class FCImplForward_cpu : public Registrable<FCImplForward_cpu,
                                                 std::tuple<DataType, DataType, DataType, DataType>,
                                                 void(const FC_Op::Parameters &, const DimSize_t, const DimSize_t,
                                                      const void *, const void *, const void *, void *)> {};
class FCImplBackward_cpu : public Registrable<FCImplBackward_cpu,
                                                  std::tuple<DataType, DataType, DataType, DataType>,
                                                  void(const FC_Op::Parameters &, const DimSize_t, const DimSize_t,
                                                       const void *, const void *, const void *, void *)> {};

class FCImpl_cpu : public OperatorImpl {
   private:
    const FC_Op &mOp;
    std::array<NbElts_t, 3> mNbConsumedData;
    std::array<NbElts_t, 1> mNbProducedData;

   public:
    FCImpl_cpu(const FC_Op &op) : mOp(op), mNbConsumedData({0, 0, 0}), mNbProducedData({0}) {}

    static std::unique_ptr<FCImpl_cpu> create(const FC_Op &op) { return std::make_unique<FCImpl_cpu>(op); }

   public:
    NbElts_t getNbRequiredData(const IOIndex_t inputIdx) const override final;
    NbElts_t getNbRequiredProtected(const IOIndex_t inputIdx) const override final;
    NbElts_t getRequiredMemory(__attribute__((unused)) const IOIndex_t outputIdx, const std::vector<DimSize_t> &inputsSize) const override final;
    NbElts_t getNbConsumedData(const IOIndex_t inputIdx) const override final;
    NbElts_t getNbProducedData(const IOIndex_t outputIdx) const override final;

    void forward();

    void backward();
};

namespace {
static Registrar<FC_Op> registrarFCImpl_cpu("cpu", Aidge::FCImpl_cpu::create);
}
}  // namespace Aidge

#endif /* __AIDGE_CPU_OPERATOR_FCIMPL_H__ */