// Copyright (C) 2018-2020 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
//

/**
 * @brief This is a header file for the ICNNNetwork class
 *
 * @file ie_icnn_network.hpp
 */
#pragma once

#include <map>
#include <memory>
#include <string>

#include "details/ie_irelease.hpp"
#include "ie_blob.h"
#include "ie_common.h"
#include "ie_data.h"
#include "ie_icnn_network_stats.hpp"
#include "ie_iextension.h"
#include "ie_input_info.hpp"
#include "ie_layers.h"
#include "ie_preprocess.hpp"

namespace ngraph {

class Function;

}  // namespace ngraph

namespace InferenceEngine {

/**
 * @brief A collection that contains string as key, and Data smart pointer as value
 */
using OutputsDataMap = std::map<std::string, DataPtr>;

/**
 * @interface ICNNNetwork
 * @brief This is the main interface to describe the NN topology
 */
class INFERENCE_ENGINE_API_CLASS(ICNNNetwork): public details::IRelease {
public:
    /**
     * @brief A shared pointer to a ICNNNetwork interface
     */
    using Ptr = std::shared_ptr<ICNNNetwork>;

    /**
     * @brief Returns nGraph function
     * @return nGraph function
     */
    virtual std::shared_ptr<ngraph::Function> getFunction() noexcept = 0;

    /**
     * @brief Returns constant nGraph function
     * @return constant nGraph function
     */
    virtual std::shared_ptr<const ngraph::Function> getFunction() const noexcept = 0;

    /**
     * @deprecated Network precision does not make sence, use precision on egdes. The method will be removed in 2021.1
     * @brief Returns the main network operating precision.
     *
     * This may be MIXED if not homogeneous.
     *
     * @return A precision type
     */
    INFERENCE_ENGINE_DEPRECATED("Network precision does not make sence, use precision on egdes. The method will be removed in 2021.1")
    virtual Precision getPrecision() const noexcept = 0;

    /**
     * @brief Gets the network output Data node information. The received info is stored in the given Data node.
     *
     * For single and multiple outputs networks.
     *
     * This method need to be called to find output names for using them later
     * when calling InferenceEngine::InferRequest::GetBlob or InferenceEngine::InferRequest::SetBlob
     *
     *
     * @param out Reference to the OutputsDataMap object
     */
    virtual void getOutputsInfo(OutputsDataMap& out) const noexcept = 0;

    /**
     * @brief Gets the network input Data node information. The received info is stored in the given InputsDataMap
     * object.
     *
     * For single and multiple inputs networks.
     * This method need to be called to find out input names for using them later
     * when calling InferenceEngine::InferRequest::SetBlob
     *
     * @param inputs Reference to InputsDataMap object.
     */
    virtual void getInputsInfo(InputsDataMap& inputs) const noexcept = 0;

    /**
     * @brief Returns information on certain input pointed by inputName
     *
     * @param inputName Name of input layer to get info on
     * @return A smart pointer to the input information
     */
    virtual InputInfo::Ptr getInput(const std::string& inputName) const noexcept = 0;

    /**
     * @deprecated Use ICNNNetwork::getName() instead. The method will be removed in 2021.1
     * @brief Gets the network name. The name is stored in the given pName string.
     *
     * @param pName - will receive actual network name, specified in IR file,
     *     pName should point to valid memory address before invoking this function
     * @param len - size in bytes of pName buffer, actual name is trimmed by this size
     */
    INFERENCE_ENGINE_DEPRECATED("Use ICNNNetwork::getName() instead. The method will be removed in 2021.1")
    virtual void getName(char* pName, size_t len) const noexcept = 0;

    /**
     * @brief Returns the network name.
     *
     * @return Network name
     */
    virtual const std::string& getName() const noexcept = 0;

    /**
     * @brief Returns the number of layers in the network as an integer value
     *
     * @return The number of layers as an integer value
     */
    virtual size_t layerCount() const noexcept = 0;

    /**
     * @deprecated Migrate to IR v10 and work with ngraph::Function directly. The method will be removed in 2021.1
     * @brief Returns a smart pointer reference to a Data node given its name.
     *
     * If the Data node is missing, returns reference to a default initialized new empty data pointer with given name.
     *
     * @param dname Name of the Data node
     * @return Data node smart pointer
     */
    INFERENCE_ENGINE_DEPRECATED("Migrate to IR v10 and work with ngraph::Function directly. The method will be removed in 2021.1")
    virtual DataPtr& getData(const char* dname) noexcept = 0;

    /**
     * @deprecated Migrate to IR v10 and work with ngraph::Function directly. The method will be removed in 2021.1
     * @brief Insert a layer into the network. A user is responsible to connect it to other data elements.
     *
     * @param layer Const reference to a layer smart pointer
     */
    INFERENCE_ENGINE_DEPRECATED("Migrate to IR v10 and work with ngraph::Function directly. The method will be removed in 2021.1")
    virtual void addLayer(const CNNLayerPtr& layer) noexcept = 0;

    /**
     * @brief Adds output to the layer
     *
     * @param layerName Name of the layer
     * @param outputIndex Index of the output
     * @param resp Response message
     * @return Status code of the operation
     */
    virtual StatusCode addOutput(const std::string& layerName, size_t outputIndex = 0,
                                 ResponseDesc* resp = nullptr) noexcept = 0;

    /**
     * @deprecated Migrate to IR v10 and work with ngraph::Function directly. The method will be removed in 2021.1
     * @brief Gets network layer with the given name
     *
     * @param layerName Given name of the layer
     * @param out Pointer to the found CNNLayer object with the given name
     * @param resp Pointer to the response message that holds a description of an error if any occurred
     * @return Status code of the operation. InferenceEngine::OK if succeeded
     */
    INFERENCE_ENGINE_DEPRECATED("Migrate to IR v10 and work with ngraph::Function directly. The method will be removed in 2021.1")
    virtual StatusCode getLayerByName(const char* layerName, CNNLayerPtr& out, ResponseDesc* resp) const noexcept = 0;

    /**
     * @brief Changes the inference batch size.
     *
     * @note There are several limitations and it's not recommended to use it. Set batch to the input shape and call
     * ICNNNetwork::reshape.
     *
     * @param size Size of batch to set
     * @param responseDesc Pointer to the response message that holds a description of an error if any occurred
     * @return Status code of the operation
     * @note Current implementation of the function sets batch size to the first dimension of all layers in the
     * networks. Before calling it make sure that all your layers have batch in the first dimension, otherwise the
     * method works incorrectly. This limitation is resolved via shape inference feature by using
     * InferenceEngine::ICNNNetwork::reshape method. To read more refer to the Shape Inference section in documentation
     *
     * @note Current implementation of the function sets batch size to the first dimension of all layers in the
     * networks. Before calling it make sure that all your layers have batch in the first dimension, otherwise the
     * method works incorrectly. This limitation is resolved via shape inference feature by using
     * InferenceEngine::ICNNNetwork::reshape method. To read more refer to the Shape Inference section in documentation
     */
    virtual StatusCode setBatchSize(size_t size, ResponseDesc* responseDesc) noexcept = 0;

    /**
     * @brief Gets the inference batch size
     *
     * @return The size of batch as a size_t value
     */
    virtual size_t getBatchSize() const noexcept = 0;

    /**
     * @brief Map of pairs: name of corresponding data and its dimension.
     */
    using InputShapes = std::map<std::string, SizeVector>;

    /**
     * @brief Run shape inference with new input shapes for the network
     *
     * @param inputShapes - map of pairs: name of corresponding data and its dimension.
     * @param resp Pointer to the response message that holds a description of an error if any occurred
     * @return Status code of the operation
     */
    virtual StatusCode reshape(const InputShapes& inputShapes, ResponseDesc* resp) noexcept {
        (void)inputShapes;
        (void)resp;
        return NOT_IMPLEMENTED;
    };

    /**
     * @deprecated Use Core::AddExtension to add an extension to the library
     * @brief Registers extension within the plugin
     *
     * @param extension Pointer to already loaded reader extension with shape propagation implementations
     * @param resp Pointer to the response message that holds a description of an error if any occurred
     * @return Status code of the operation. InferenceEngine::OK if succeeded
     */
    INFERENCE_ENGINE_DEPRECATED("Use Core::AddExtension to add an extension to the library")
    virtual StatusCode AddExtension(const IShapeInferExtensionPtr& extension, ResponseDesc* resp) noexcept;

    /**
     * @deprecated Migrate to IR v10 and use quantization approach with FakeQuantize
     * @brief Gets the statistics.
     * @param stats The statistics
     * @param resp Pointer to the response message that holds a description of an error if any occurred
     * @return Status code of the operation
     */
    IE_SUPPRESS_DEPRECATED_START
    INFERENCE_ENGINE_INTERNAL("Migrate to IR v10 and use quantization approach with FakeQuantize")
    virtual StatusCode getStats(ICNNNetworkStats** stats, ResponseDesc* resp) const noexcept {
        (void)stats;
        (void)resp;
        return NOT_IMPLEMENTED;
    };
    IE_SUPPRESS_DEPRECATED_END

    /**
     * @brief Serialize network to IR and weights files.
     *
     * @param xmlPath Path to output IR file.
     * @param binPath Path to output weights file.
     * @param resp Pointer to the response message that holds a description of an error if any occurred
     * @return Status code of the operation
     */
    virtual StatusCode serialize(const std::string& xmlPath, const std::string& binPath, ResponseDesc* resp) const
        noexcept = 0;

    /**
     * @brief A virtual destructor.
     */
    virtual ~ICNNNetwork();
};
}  // namespace InferenceEngine
