/*!
 * @file state.h
 * Definition of the States Class
*/

#ifndef _STATE_H
#define _STATE_H

// FORWARD DECLARATION
class PNode;
class WorldEntity;
template<class T> class tList;
//template<class T> class tStack;

//! handles states about orxonox's most importatn objects
/**
 * This is an abstract Class-container, not really a Class.
 * in this Class only static references to the most important
 * Objects/List/etc. are stored.
 */
class State {

 public:
  // CAMERA //
  /** @param camera the PNode to the Camera, @param cameraTarget the PNode to the Camera's target */
  static void setCamera(const PNode* camera, const PNode* cameraTarget);
  /** @returns a Pointer to the PNode of the Camera */
  static inline const PNode* getCamera() { return State::camera; };
  /** @returns a Pointer to the CameraTarget */
  static inline const PNode* getCameraTarget() { return State::cameraTarget; };

  // WORLD_ENTITY_LIST //
  /** @param worldEntityList The World's List of WorldEntities */
  static inline void setWorldEntityList(tList<WorldEntity>* worldEntityList) { State::worldEntityList = worldEntityList; };
  /** @returns the List of WorldEntities */
  static inline tList<WorldEntity>* getWorldEntityList() { return State::worldEntityList; };

 private:
  State();

  static const PNode*           camera;             //!< A reference to the camera
  static const PNode*           cameraTarget;       //!< A reference to the cameraTarget
  static PNode*                 nullParent;         //!< A reference to the Null-PNode.

  static tList<WorldEntity>*    worldEntityList;    //!< The List of the worldEntities

  //tStack<
};

#endif /* _STATE_H */