/*!
 * @file story_entity.h
 *  holds the base class of everything that is playable - that is part of the story
 */


#ifndef _STORY_ENTITY_H
#define _STORY_ENTITY_H

#include "base_object.h"
#include "story_def.h"
#include "error.h"


typedef enum StoryEntityState
{
  SE_STATE_RUN     = 0,
  SE_STATE_STOP,
  SE_STATE_PAUSE,

  SE_STATE_NUM
};


//! A class that represents something to play in orxonox. it is a container for worlds, movies, mission briefings, etc...
class StoryEntity : virtual public BaseObject
{
  ObjectListDeclaration(StoryEntity);

public:
  StoryEntity ();
  virtual ~StoryEntity ();

  virtual void loadParams(const TiXmlElement* root);

  /* initialisation and loading */
  /** initializes a Story Entity to the needed values */
  virtual ErrorMessage init() { return ErrorMessage(); };
  /** called to load the data into the StoryEntity*/
  virtual ErrorMessage loadData() { return ErrorMessage(); };
  /** function that unloads the data from the StoryEntity */
  virtual ErrorMessage unloadData() { return ErrorMessage(); };

  /* running, stopping and pausing */
  /** starts the Entity. Starts the main cycle */
  virtual bool start() = 0;
  /**  Stops the entity. */
  virtual bool stop() = 0;
  /** pauses the Entity, you can resume the game by calling the resume() function */
  virtual bool pause() = 0;
  /** resumes a paused StoryEntity */
  virtual bool resume() = 0;
  /** function that is been called when the StoryEntity is started via start() */
  virtual void run() = 0;

  /* properties interface */
  /** returns the state of this StoryEntity */
  StoryEntityState getState();

  /** sets the story id of the current entity, this enables it to be identified in a global context.  @param storyID the story id */
  inline void setStoryID(int storyID) { this->storyID = storyID; }
  /** sets the story id of the current entity, this enables it to be identified in a  global context. @returns  the story id  */
  inline int getStoryID() { return this->storyID; }

  void setLoadFile(const std::string& fileName);
  /** @returns the Filename this StoryEntity was loaded with */
  const std::string& getLoadFile() const { return this->loadFile; }

  bool setNextStoryName(const std::string& nextStoryName);
  void setNextStoryID(int nextStoryID);
  /**  gets the story id of the current entity @returns story id */
  inline int getNextStoryID() const { return this->nextStoryID; }
  inline void setDescription(const std::string& description);
  /** @returns the description of this StoryEntity */
  inline const std::string& getDescription() { return this->description; }

  void grabWorldInfo();
  /** toggle the menu visibility: SimpleMenu specific */
  inline void addToGameMenu(bool toggle) { this->bMenuEntry = toggle; }
  /** @returns true if the GameWorld should be contained in the SimpleMenu: SimpleMenu specific */
  inline bool isContainedInMenu() { return this->bMenuEntry; }
  /** sets the menu item image of this StoryEntity @param name name */
  inline void setMenuItemImage(const std::string& image);
  /** @returns the menu item image of this StoryEntity */
  inline const std::string& getMenuItemImage() { return this->menuItemImage; }
  inline void setMenuScreenshoot(const std::string& image);
  /** @returns the menu screenshoot of this StoryEntity */
  inline const std::string& getMenuScreenshoot() { return this->menuScreenshoot; }

protected:
  bool          bInit;             //!< if the entity is initialized, this has to be true.
  bool          bRunning;          //!< is true if the entity is running
  bool          bPaused;           //!< is true if the entity is paused


private:
  int           storyID;          //!< this is the number of this entity, identifying it in a list/tree...
  int           nextStoryID;      //!< if this entity has finished, this entity shall be called
  std::string   loadFile;         //!< The file from which this world is loaded

  std::string   description;      //!< the description of the StoryEntity
  std::string   menuItemImage;    //!< the item image of the StoryEntity
  std::string   menuScreenshoot;  //!< the screenshoot of the StoryEntity
  bool          bMenuEntry;       //!< If true, this GameWorld apears in the SimpleMenu: SimpleMenu specific
};

#endif /* _STORY_ENTITY_H */