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

#pragma once

#include <backends/Workload.hpp>
#include <backends/WorkloadData.hpp>

#include <arm_compute/runtime/CL/CLFunctions.h>

namespace armnn
{

class ClLstmFloatWorkload : public FloatWorkload<LstmQueueDescriptor>
{
public:
    ClLstmFloatWorkload(const LstmQueueDescriptor& descriptor, const WorkloadInfo& info);
    void Execute() const override;

private:
    mutable arm_compute::CLLSTMLayer m_LstmLayer;

    std::unique_ptr<arm_compute::CLTensor> m_InputToInputWeightsTensor;
    std::unique_ptr<arm_compute::CLTensor> m_InputToForgetWeightsTensor;
    std::unique_ptr<arm_compute::CLTensor> m_InputToCellWeightsTensor;
    std::unique_ptr<arm_compute::CLTensor> m_InputToOutputWeightsTensor;
    std::unique_ptr<arm_compute::CLTensor> m_RecurrentToInputWeightsTensor;
    std::unique_ptr<arm_compute::CLTensor> m_RecurrentToForgetWeightsTensor;
    std::unique_ptr<arm_compute::CLTensor> m_RecurrentToCellWeightsTensor;
    std::unique_ptr<arm_compute::CLTensor> m_RecurrentToOutputWeightsTensor;
    std::unique_ptr<arm_compute::CLTensor> m_CellToInputWeightsTensor;
    std::unique_ptr<arm_compute::CLTensor> m_CellToForgetWeightsTensor;
    std::unique_ptr<arm_compute::CLTensor> m_CellToOutputWeightsTensor;
    std::unique_ptr<arm_compute::CLTensor> m_InputGateBiasTensor;
    std::unique_ptr<arm_compute::CLTensor> m_ForgetGateBiasTensor;
    std::unique_ptr<arm_compute::CLTensor> m_CellBiasTensor;
    std::unique_ptr<arm_compute::CLTensor> m_OutputGateBiasTensor;
    std::unique_ptr<arm_compute::CLTensor> m_ProjectionWeightsTensor;
    std::unique_ptr<arm_compute::CLTensor> m_ProjectionBiasTensor;

    std::unique_ptr<arm_compute::CLTensor> m_ScratchBuffer;

    void FreeUnusedTensors();
};

arm_compute::Status ClLstmFloatWorkloadValidate(const TensorInfo& input, const TensorInfo& outputStateIn,
                                                const TensorInfo& cellStateIn, const TensorInfo& scratchBuffer,
                                                const TensorInfo& outputStateOut, const TensorInfo& cellStateOut,
                                                const TensorInfo& output, const LstmDescriptor &descriptor,
                                                const TensorInfo& inputToForgetWeights,
                                                const TensorInfo& inputToCellWeights,
                                                const TensorInfo& inputToOutputWeights,
                                                const TensorInfo& recurrentToForgetWeights,
                                                const TensorInfo& recurrentToCellWeights,
                                                const TensorInfo& recurrentToOutputWeights,
                                                const TensorInfo& forgetGateBias, const TensorInfo& cellBias,
                                                const TensorInfo& outputGateBias,
                                                const TensorInfo* inputToInputWeights,
                                                const TensorInfo* recurrentToInputWeights,
                                                const TensorInfo* cellToInputWeights,
                                                const TensorInfo* inputGateBias,
                                                const TensorInfo* projectionWeights,
                                                const TensorInfo* projectionBias,
                                                const TensorInfo* cellToForgetWeights,
                                                const TensorInfo* cellToOutputWeights);
} //namespace armnn