#pragma once

#include "Array.h"
#include "Critical.h"

namespace Framework
{
    class DXBuffer;

    enum ShaderType
    {
        UNBEKANNT,
        VERTEX,
        PIXEL
    };

    //! A Shader class that manages all constant buffers of a shader
    class Shader : public virtual ReferenceCounter
    {
    protected:
        ShaderType type;
        RCArray<DXBuffer>* constBuffers;

    public:
        //! Constructor
        DLLEXPORT Shader();
        //! Destructor
        DLLEXPORT virtual ~Shader();
        //! Sets the compiled shader
        //!  zD3d11Device: The device with which the shader should be created
        //! \param bytes The bytes of the compiled code
        //! \param length The length of the byte array
        //! \return true if bytes is valid, false otherwise
        virtual bool setCompiledByteArray(unsigned char* bytes, int length) = 0;
        //! After calling this function, this shader is used as a pixel shader
        //!  zD3d11Context: The context object with which the shader should
        //!  be used
        virtual void useShader() = 0;
        //! Creates a constant buffer that passes constant data to the shader.
        //! A maximum of 14 buffers can be created.
        //!  zD3d11Device: The device with which the buffer should be created
        //! \param size The size of the buffer in bytes
        //! \param index The position of the buffer in the buffer array. An
        //! existing buffer will be replaced. Buffer 1 cannot be created
        //! if buffer 0 has not been created yet, etc.
        virtual bool createConstBuffer(int size, int index) = 0;
        //! Deletes a constant buffer
        //! \param index The index of the buffer to delete. Buffer 0 cannot
        //! be deleted while buffer 1 still exists, etc.
        DLLEXPORT bool removeConstBuffer(int index);
        //! Copies data into a constant buffer
        //!  zD3d11Context: The context object to use for copying
        //! \param data A pointer to a byte array of the buffer's size
        //! \param index The index of the buffer
        //! \param len The length of the data in bytes (-1 for the maximum
        //! buffer size)
        DLLEXPORT bool fillConstBuffer(char* data, int index, int len = -1);
        //! Returns the length of a constant buffer
        //! \param index The index of the buffer
        DLLEXPORT int getConstBufferLaenge(int index) const;
        //! Returns the shader type
        DLLEXPORT ShaderType getType() const;
        //! Returns the index of the first uninitialized buffer
        DLLEXPORT int getFirstUninitializedBufferIndex() const;
    };
} // namespace Framework