#ifndef PHYSICS_HH
#define PHYSICS_HH

#include "Vector.hh"

#include <ClanLib/core.h>

const uint16_t PHYSICS_TICK_MS = 100;

// forward-declare
class PhysicsObject;

class PhysicsWorld {
    friend class PhysicsObject;
            
    private:
        CL_Timer tick_timer;

    protected:
        std::vector<PhysicsObject*> objects;
        Vector gravity;
        Vector dimensions;

        CL_SlotContainer slots;
        
        PhysicsWorld (Vector gravity, Vector dimensions);

    public:
        void addObject (PhysicsObject *object);

        void tick (void);
};

class PhysicsObject {
    protected:
        PhysicsWorld &world;
        float mass;
        Vector position;
        Vector velocity;
    
        PhysicsObject (PhysicsWorld &world, float mass, Vector position, Vector velocity);
    
    private:
        void updatePosition (void);

    protected:
        void applyForce (Vector force, uint16_t dt);
        void updatePhysics (Vector position, Vector velocity);
    
    public:
        Vector getPosition (void);

        void tick (void);
};

#endif