#ifndef BAG_LAYER_H

#define BAG_LAYER_H

#include "bag_config.h"

#include "bag_fordec.h"

#include "bag_types.h"

#include "bag_uint8array.h"

#include <memory>

namespace BAG {

#ifdef _MSC_VER

#pragma warning(push)

#pragma warning(disable: 4251)  // std classes do not have DLL-interface when exporting

#endif

//! The interface for a layer.

class BAG_API Layer

{

public:

    virtual ~Layer() = default;

    Layer(const Layer&) = delete;

    Layer(Layer&&) = delete;

    Layer& operator=(const Layer&) = delete;

    Layer& operator=(Layer&&) = delete;

    bool operator==(const Layer &rhs) const noexcept {

        return m_pLayerDescriptor == rhs.m_pLayerDescriptor &&

            weak_ptr_equals(m_pBagDataset, rhs.m_pBagDataset);

    }

    bool operator!=(const Layer &rhs) const noexcept {

        return !(rhs == *this);

    }

    static DataType getDataType(LayerType layerType) noexcept;

    static uint8_t getElementSize(DataType type);

    static std::string getInternalPath(LayerType layerType,

        GroupType groupType = UNKNOWN_GROUP_TYPE);

    std::shared_ptr<LayerDescriptor> getDescriptor() & noexcept;

    std::shared_ptr<const LayerDescriptor> getDescriptor() const & noexcept;

    UInt8Array read(uint32_t rowStart,

        uint32_t columnStart, uint32_t rowEnd, uint32_t columnEnd) const;

    void write(uint32_t rowStart, uint32_t columnStart, uint32_t rowEnd,

        uint32_t columnEnd, const uint8_t* buffer);

    void writeAttributes() const;

protected:

    Layer(Dataset& dataset, LayerDescriptor& descriptor);

    std::weak_ptr<Dataset> getDataset() & noexcept;

    std::weak_ptr<const Dataset> getDataset() const & noexcept;

private:

    virtual UInt8Array readProxy(uint32_t rowStart,

        uint32_t columnStart, uint32_t rowEnd, uint32_t columnEnd) const = 0;

    virtual void writeProxy(uint32_t rowStart, uint32_t columnStart,

        uint32_t rowEnd, uint32_t columnEnd, const uint8_t* buffer) = 0;

    virtual void writeAttributesProxy() const = 0;

    //! The HDF5 DataSet this layer is stored in.

    std::weak_ptr<Dataset> m_pBagDataset;

    //! The layer's descriptor (owned).

    std::shared_ptr<LayerDescriptor> m_pLayerDescriptor;

    friend Dataset;

    friend ValueTable;

};

#ifdef _MSC_VER

#pragma warning(pop)

#endif

}  // namespace BAG

#endif  //BAG_LAYER_H