/*
 *   ORXONOX - the hottest 3D action shooter ever to exist
 *                    > www.orxonox.net <
 *
 *
 *   License notice:
 *
 *   This program is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU General Public License
 *   as published by the Free Software Foundation; either version 2
 *   of the License, or (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 *   Author:
 *      Maurus Kaufmann
 *   Co-authors:
 *      ...
 *
 */
 
 /* TODO:   - Sobald Bots im Spiel sind, stürzt das Programm relativ bald ab!!!
 */
 
 
 /* REALISIERUNGSIDEEN:
   
    Mehrere Instanzen:
        Im Konstruktor schauen, wer innerhalb der eigenen Grenzen ist und diese in eine Liste geben, die in jeder tick-Funktion
        durchgearbeitet wird.
        Moeglichkeit bereitstellen, ein Pawn durch ein Portal einer anderen Instanz von SpaceBoundaries zuzuweisen.
        Schauen, wie es zu handhaben ist, wenn ein neuer Spieler oder Bot nachtraeglich ins Spiel kommt.
 
 */

#ifndef _SpaceBoundaries_H__
#define _SpaceBoundaries_H__

/* Einige, spezifische include-Statements */
#include "core/CoreIncludes.h"
#include "tools/interfaces/Tickable.h"
#include "interfaces/RadarViewable.h"
#include "worldentities/StaticEntity.h"
#include "worldentities/WorldEntity.h"

#include <string>
#include <list>
#include <map>
#include <vector>

/**
@brief SpaceBoundaries gives level creators the possibility to bar Pawns from leaving a defined area.

       Five attributes can/should be defined in the XML-File:
       - 'position' : absolute position of the SpaceBoundaries class. 'warnDistance' and 'maxDistance' refer to this 'position'.
       - 'warnDistance' : If the distance between the pawn of the human player and 'position' is bigger than 'warnDistance', a message is displayed to
                          inform the player that he'll soon be leaving the allowed area. 
       - 'maxDistance' : defines the area, where a pawn is allowed to be (radius of a ball).
       - 'showDistance' : If the distance between the pawn and the boundary of the allowed area is smaller than 'showDistance', the boundary is shown. 
       - 'healthDecrease' : a measure to define how fast the health of a pawn should decrease after leaving the allowed area.
                            Empfohlene Werte: 0.1 (langsame Health-Verminderung) bis 5 (sehr schnelle Health-Verminderung)
*/

namespace orxonox
{
    class _OrxonoxExport SpaceBoundaries : public StaticEntity, public Tickable
    {
        public:
            SpaceBoundaries(BaseObject* creator);
            ~SpaceBoundaries();
            
            void checkWhoIsIn(); //!< Update the list 'pawnsIn_'.
            
            void positionBillboard(const Vector3 position);
            void setBillboardOptions(Billboard *billy);
            void removeAllBillboards();
            
            void setMaxDistance(float r);
            float getMaxDistance();
            
            void setWarnDistance(float r);
            float getWarnDistance();
            
            void setShowDistance(float r);
            float getShowDistance();
            
            void setHealthDecrease(float amount);
            float getHealthDecrease();

            void XMLPort(Element& xmlelement, XMLPort::Mode mode);
            
            void tick(float dt);

        private:
            struct billboardAdministration{ bool usedYet; Billboard* billy; };
            
            std::list<Pawn*> pawnsIn_; //!< List of the pawns that this instance of SpaceBoundaries has to handle.
            
            std::vector<billboardAdministration> billboards_;
        
            float maxDistance_; //!< maximal zulaessige Entfernung von 'this->getPosition()'.
            float warnDistance_; //!< Entfernung von 'this->getPosition()', ab der eine Warnung angezeigt wird, dass man bald das zulaessige Areal verlaesst.
            float showDistance_; //!< Definiert, wann die Grenzen visualisiert werden sollen.
            
            float healthDecrease_; //!< Mass fuer die Anzahl Health-Points, die nach ueberschreiten der Entfernung 'maxDistance_' von 'this->getPosition()' abgezogen werden.
                                   //!< Empfohlene Werte: 0.1 (langsame Health-Verminderung) bis 5 (sehr schnelle Health-Verminderung)
            
            Billboard *boundary_;
            
            RadarViewable* centerRadar_; //!< Repraesentation von SpaceBoundaries auf dem Radar.
        
            float computeDistance(WorldEntity *item); //!< Auf den Mittelpunkt 'this->getPosition()' bezogen.
            void displayWarning(const std::string warnText);
            void displayBoundaries(Pawn *item);
            void bounceBack(Pawn *item);
            bool isHumanPlayer(Pawn *item);
            
    };
}

#endif /* _SpaceBoundaries_H__ */