#pragma once

#include <rbx/Boost.hpp>
#include "GfxCore/Resource.h"
#include "TextureRef.h"

namespace RBX { namespace Graphics {

class Framebuffer;
class VisualEngine;
class DeviceContext;
class RenderCamera;
class DeviceContext;
class Device;

class EnvMap: public Resource
{
public:
    EnvMap(VisualEngine* ve);
    ~EnvMap();

    const TextureRef& getTexture() const { return texture; }

    void update(DeviceContext* context, double gameTime);
    void markDirty(bool veryDirty = false);

private:

    void incrementalUpdate(DeviceContext* context);
    void fullUpdate(DeviceContext* context);
private:

    enum DirtyState
    {
        Ready,       // ready for business
        Dirty,       // update has been scheduled
        BusyDirty,   // update has been scheduled but another update is already in progress
        DirtyWait,   // full update has been scheduled, but waiting for the sky to finish loading 
        VeryDirty,   // full update has been scheduled,
    };

    VisualEngine*           visualEngine;
    TextureRef              texture; // the cubemap itself
    shared_ptr<Framebuffer> fbFaces[6]; // for rendering
    //shared_ptr<ShaderProgram> mipGen; // mipmap generator
    unsigned                updateStep;
    DirtyState              dirtyState;
    double                  envmapLastTimeOfDay;
    double                  envmapLastRealTime;

    void renderFace(DeviceContext* context, int face);
    virtual void onDeviceRestored();
    void clearDirty();
};

}} // ns