#pragma once

#include "Vec2.h"
#include "Mat4.h"
#include "Ebene3D.h"

// DirectX 11 Types

struct ID3D11Device;
struct ID3D11DeviceContext;
struct IDXGISwapChain;
struct ID3D11Texture2D;
struct ID3D11SamplerState;
struct ID3D11ShaderResourceView;
struct ID3D11RenderTargetView;
struct ID3D11DepthStencilView;
struct ID3D11DepthStencilState;
struct ID3D11RasterizerState;
struct ID3D11BlendState;
struct D3D11_VIEWPORT;

// DirectX 9 Types

struct IDirect3D9;
struct IDirect3DDevice9;
struct IDirect3DSurface9;
struct _D3DLOCKED_RECT;

namespace Framework
{
    class WFenster;
    class Bild;
    class Textur;
    class DX11PixelShader;
    class DX11VertexShader;
    class TexturModel;
    class Render3D;
    class TexturList;
    class Kam3D;
    class Model3D;
    class DX11Buffer;
    class DX11StructuredBuffer;

    enum GraphicApiType
    {
        NOT_SUPPORTED, // no graphic api supported
        DIRECTX9, // only 2d
        DIRECTX11, // 3d simple phong model without shadows
        DIRECTX12 // 3d phong model with raytraycing
    };

    struct DiffuseLight
    {
        Vec3<float> direction;
        Vec3<float> color;
    };

    struct PointLight
    {
        Vec3<float> position;
        Vec3<float> color;
        float radius;
    };

    class GraphicsApi
    {
    protected:
        GraphicApiType typ;
        WFenster *fenster;
        Vec2<int> backBufferSize;
        bool fullScreen;

    private:
        int ref;

    public:
        __declspec( dllexport ) GraphicsApi( GraphicApiType typ );
        __declspec( dllexport ) virtual ~GraphicsApi();
        __declspec( dllexport ) virtual void initialize( WFenster *fenster, Vec2<int> backBufferSize, bool fullScreen );
        __declspec( dllexport ) virtual void setBackBufferSize( Vec2< int > size );
        __declspec( dllexport ) virtual void setFullScreen( bool fullScreen );
        __declspec( dllexport ) virtual void update() = 0;
        __declspec( dllexport ) virtual void beginFrame( bool fill2D = 0, bool fill3D = 0, int fillColor = 0 );
        __declspec( dllexport ) virtual void renderKamera( Kam3D *zKamera );
        __declspec( dllexport ) virtual void presentFrame() = 0;
        __declspec( dllexport ) virtual Textur *createOrGetTextur( const char *name, Bild *b = 0 );
        __declspec( dllexport ) GraphicApiType getTyp() const;
        __declspec( dllexport ) Vec2< int > getBackBufferSize() const;
        __declspec( dllexport ) bool isFullScreen() const;
        __declspec( dllexport ) virtual Bild *zUIRenderBild() const = 0;
        __declspec( dllexport ) GraphicsApi *getThis();
        __declspec( dllexport ) GraphicsApi *release();
    };

    class DirectX9 : public GraphicsApi
    {
    private:
        IDirect3D9 *pDirect3D;
        IDirect3DDevice9 *pDevice;
        IDirect3DSurface9 *pBackBuffer;
        _D3DLOCKED_RECT *backRect;
        Bild *uiBild;

    public:
        __declspec( dllexport ) DirectX9();
        __declspec( dllexport ) ~DirectX9();
        __declspec( dllexport ) void initialize( WFenster *fenster, Vec2<int> backBufferSize, bool fullScreen ) override;
        __declspec( dllexport ) void update() override;
        __declspec( dllexport ) void beginFrame( bool fill2D, bool fill3D, int fillColor ) override;
        __declspec( dllexport ) void presentFrame() override;
        __declspec( dllexport ) Bild *zUIRenderBild() const override;
    };

    class DirectX11 : public GraphicsApi
    {
    private:
        ID3D11Device *d3d11Device;
        ID3D11DeviceContext *d3d11Context;
        IDXGISwapChain *d3d11SpawChain;
        Textur *uiTextur;
        DX11VertexShader *vertexShader;
        DX11PixelShader *pixelShader;
        ID3D11SamplerState *sampleState;
        ID3D11RenderTargetView *rtview;
        ID3D11DepthStencilView *dsView;
        ID3D11Texture2D *depthStencilBuffer;
        ID3D11DepthStencilState *depthStencilState;
        ID3D11DepthStencilState *depthDisabledStencilState;
        ID3D11BlendState *blendStateAlphaBlend;
        D3D11_VIEWPORT *vp;
        TexturModel *texturModel;
        TexturList *texturRegister;
        ID3D11RasterizerState *texturRS;
        ID3D11RasterizerState *meshRS;
        Textur *defaultTextur;
        DX11StructuredBuffer *diffuseLights;
        DX11StructuredBuffer *pointLights;
        DX11Buffer *vertexBuffer;
        DX11Buffer *indexBuffer;
        Mat4< float > matrixBuffer[ MAX_KNOCHEN_ANZ ];
        Mat4< float > viewAndProj[ 2 ];
        Vec3< float > kamPos;
        Ebene3D< float > frustrum[ 6 ];

        void renderObject( Model3D *zObj );
        // Überprüft, ob eine Kugel in dem Sichtbaren Raum der Welt liegt und gezeichnet werden muss
        //  pos: Der Mittelpunkt der Kugel
        //  radius: Der Radius der Kugel
        //  dist: Einen Zeiger auf einen float, in dem das quadrat des Abstands zur Kammeraposition gespeichert wird, falls diese Funktion true zurückgiebt und der Zeiger nicht 0 ist
        bool isInFrustrum( const Vec3< float > &pos, float radius, float *dist = 0 ) const;

    public:
        __declspec( dllexport ) DirectX11();
        __declspec( dllexport ) ~DirectX11();
        __declspec( dllexport ) void initialize( WFenster *fenster, Vec2<int> backBufferSize, bool fullScreen ) override;
        __declspec( dllexport ) void update() override;
        __declspec( dllexport ) void beginFrame( bool fill2D, bool fill3D, int fillColor ) override;
        __declspec( dllexport ) void renderKamera( Kam3D *zKamera ) override;
        __declspec( dllexport ) void presentFrame() override;
        __declspec( dllexport ) Textur *createOrGetTextur( const char *name, Bild *b ) override;
        __declspec( dllexport ) Bild *zUIRenderBild() const override;
    };

    class DirectX12 : public GraphicsApi
    {

    };
}