#ifndef CLONESOURCE_H
#define CLONESOURCE_H

#include <queue>

#include "Source.h"

class CloneSource : public Source
{
    friend class Source;

public:
    ~CloneSource();

    // implementation of source API
    void update (float dt) override;
    void setActive (bool on) override;
    bool playing () const override { return !paused_; }
    void play (bool on) override;
    bool playable () const  override;
    void replay () override;
    guint64 playtime () const override;
    uint texture() const override;
    bool failed() const override  { return origin_ == nullptr; }
    void accept (Visitor& v) override;

    // implementation of cloning mechanism
    inline void detach() { origin_ = nullptr; }
    inline Source *origin() const { return origin_; }

    // Clone properties
    void setDelay(double second);
    double delay() const { return delay_; }

    glm::ivec2 icon() const override;
    std::string info() const override;

protected:
    // only Source class can create new CloneSource via clone();
    CloneSource(Source *origin, uint64_t id = 0);

    void init() override;
    Source *origin_;

    // cloning & queue of past frames
    std::queue<FrameBuffer *> images_;
    Surface *cloningsurface_;
    FrameBuffer *garbage_image_;

    // time management
    GTimer *timer_;
    bool timer_reset_;
    std::queue<double> elapsed_;
    std::queue<guint64> timestamps_;
    double delay_;

    // control
    bool paused_;

    // connecting line
    class DotLine *connection_;
};


#endif // CLONESOURCE_H