#pragma once

#include <set>

#include <QObject>

#include <osgViewer/CompositeViewer>
#include <osgViewer/GraphicsWindow>

#include "app/Singleton.h"

class OsgView;
class IUpdateRender;

class OsgViewer : public QObject, public Singleton<OsgViewer> {
    Q_OBJECT

public:
    explicit OsgViewer(QObject* parent = nullptr) noexcept;
    ~OsgViewer() override;

    void SetViewer(osgViewer::CompositeViewer* viewer) {
        compositeViewer_ = viewer;
    }
    void OnDestory();

    void OnFrame(void);
    
    bool IsDone(void) const;

    OsgView* GetView() const;

    bool Initialize(void);
    void Uninitialize(void);

    void RegistRender(IUpdateRender* render);
    void UnRegistRender(IUpdateRender* render);

protected:
    void customEvent(QEvent* event) override;
    
    void OnStartPlay();

    void OnAddView(OsgView* view, int x, int y, int width, int height);
    void OnRemoveView(OsgView* view);
    void RenderUpdate();

private:
    osgViewer::CompositeViewer* compositeViewer_;
    bool initalized_{ false };

    using OsgViewSet = std::set<OsgView*>;
    OsgViewSet osgViews_;

    using UpdateRenderList = std::vector<IUpdateRender*>;
    UpdateRenderList updateRenderList_;
};