/*
 *   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:
 *      ...
 *
 */

#include "SpaceBoundaries.h"

#include "worldentities/MobileEntity.h"
#include "worldentities/ControllableEntity.h"
#include "core/ObjectListIterator.h"
#include "core/XMLPort.h"
#include "worldentities/pawns/Pawn.h"
#include "infos/PlayerInfo.h"
#include "interfaces/RadarViewable.h"
#include "graphics/Billboard.h"


//#include <OgreTextAreaOverlayElement.h>
#include <OgreOverlayManager.h>
//#include <overlays/OverlayText.h>

namespace orxonox
{
    CreateFactory(SpaceBoundaries);

    SpaceBoundaries::SpaceBoundaries(BaseObject* creator) : StaticEntity(creator)
    {
        /* Standardwerte, die zum Tragen kommen,
         * falls im XML-File keine Werte spezifiziert wurden. */
        this->setMaxDistance(3000);
        this->setWarnDistance(2000);
        this->setShowDistance(2500);
        this->setHealthDecrease(1);
        
        RegisterObject(SpaceBoundaries);
        
        // Show Boundaries on the radar.
        this->centerRadar_ = new RadarViewable(this, this);
        this->centerRadar_->setRadarObjectShape(RadarViewable::Dot);
        this->centerRadar_->setRadarVisibility(false);
        
//         m_pColoredTextAreaOverlayElementFactory = new ColoredTextAreaOverlayElementFactory();
    }
    SpaceBoundaries::~SpaceBoundaries()
    {
        delete this->centerRadar_;
        
        if(this->boundary_ != NULL)
        {
            delete this->boundary_;
        }
        
//        delete pColoredTextAreaOverlayElementFactory;
    }
    
    void SpaceBoundaries::setMaxDistance(float r)
    {
        this->maxDistance_ = r;
    }
    float SpaceBoundaries::getMaxDistance()
    {
        return this->maxDistance_;
    }
    
    void SpaceBoundaries::setWarnDistance(float r)
    {
        this->warnDistance_ = r;
    }
    float SpaceBoundaries::getWarnDistance()
    {
        return this->warnDistance_;
    }
    
    void SpaceBoundaries::setShowDistance(float r)
    {
        this->showDistance_ = r;
    }
    float SpaceBoundaries::getShowDistance()
    {
        return this->showDistance_;
    }
    
    void SpaceBoundaries::setHealthDecrease(float amount)
    {
        this->healthDecrease_ = amount/1000;
    }
    float SpaceBoundaries::getHealthDecrease()
    {
        return this->healthDecrease_;
    }

    void SpaceBoundaries::XMLPort(Element& xmlelement, XMLPort::Mode mode)
    {
        SUPER(SpaceBoundaries, XMLPort, xmlelement, mode);

        XMLPortParam(SpaceBoundaries, "maxDistance", setMaxDistance, getMaxDistance, xmlelement, mode);
        XMLPortParam(SpaceBoundaries, "warnDistance", setWarnDistance, getWarnDistance, xmlelement, mode);
        XMLPortParam(SpaceBoundaries, "healthDecrease", setHealthDecrease, getHealthDecrease, xmlelement, mode);
    }
    
    void SpaceBoundaries::tick(float dt)
    {
        for(ObjectListIterator<MobileEntity> item = ObjectList<MobileEntity>::begin(); item != ObjectList<MobileEntity>::end(); ++item)
        {
            MobileEntity* myMobileEntity = *item;
            Pawn* currentPawn = dynamic_cast<Pawn*>(myMobileEntity);
            if(currentPawn != NULL)
            {
                float distance = this->computeDistance(currentPawn);
                bool humanItem = this->isHumanPlayer(currentPawn);
                COUT(0) << "Distanz:" << distance << std::endl; //!< message for debugging
                if(distance > this->warnDistance_ && distance < this->maxDistance_) // Zeige Warnung an!
                {
                    COUT(0) << "You are leaving the area" << std::endl; //!< message for debugging
                    if(humanItem)
                    {
                        COUT(0) << "humanItem ist true" << std::endl;
                        this->displayWarning("Attention! You are leaving the area!");
                    } else {
                        
                    }
                }
                if( (this->maxDistance_ - distance) < this->showDistance_)
                {
                    // Zeige Grenze an!
                    this->displayBoundaries(currentPawn);
                }
                if(distance > this->maxDistance_)
                {
                    if(humanItem)
                    {
                        COUT(0) << "Health should be decreasing!" << std::endl;
                        this->displayWarning("You are out of the area now!");
                        currentPawn->removeHealth( (distance - maxDistance_) * this->healthDecrease_);
                    } else {
                        
                    }
                    
                    this->bounceBack(currentPawn);
                }
            }
        }
    }
    
    float SpaceBoundaries::computeDistance(WorldEntity *item)
    {
        Vector3 itemPosition = item->getPosition();
        return (itemPosition.distance(this->getPosition()));
    }
    
    void SpaceBoundaries::displayWarning(const std::string warnText)
    {   /*
        Ogre::TextAreaOverlayElement *pTextArea;
        Ogre::OverlayManager manager = Ogre::OverlayManager();
        Ogre::OverlayElement temp = manager.createOverlayElement("TextArea", "MyTextArea");
        //pTextArea = (Ogre::TextAreaOverlayElement *) 
       // pTextArea->setCaption("Some plain text");
    
        Ogre::TextAreaOverlayElement warning(warnText);
        warning.initialise();
        //warning.setPosition(0.2, 0.2);
        

        COUT(0) << "Breite des Warntextes: " << warning.getWidth() << std::endl;
        COUT(0) << "Hoehe des Warntextes: " << warning.getHeight() << std::endl;
        
        warning.show();*/
        // Register the overlay element
/*         OverlayManager::getSingleton().addOverlayElementFactory(pColoredTextAreaOverlayElementFactory);
         
        Ogre::TextAreaOverlayElement *pTextArea =
                (Ogre::TextAreaOverlayElement*)Ogre::OverlayManager.createOverlayElement("TextArea", "MyTextArea");
        pTextArea->setCaption("Some plain text");
*/
        
    }
    
    void SpaceBoundaries::displayBoundaries(Pawn *item)
    {
        
        Vector3 direction = item->getPosition() - this->getPosition();
        direction.normalise();
        
        Vector3 boundaryPosition = this->getPosition() + direction * this->maxDistance_;
        
        if(this->boundary_ == NULL)
        {
            this->boundary_ = new Billboard(this);
            this->boundary_->setMaterial("Examples/Flare");
            this->boundary_->setVisible(true);
        }
        
        this->boundary_->setPosition(boundaryPosition);
    }
    
    void SpaceBoundaries::bounceBack(Pawn *item)
    {
        Vector3 normal = item->getPosition() - this->getPosition();
        if( item->getVelocity().dotProduct(normal) > 0 ) // greife nur ein, falls 
        {
            normal.normalise();
            Vector3 velocity = item->getVelocity();
            velocity = velocity.reflect(normal);
            Vector3 acceleration = item->getAcceleration();
            acceleration = acceleration.reflect(normal);
            /*
            Vector3 rotationAxis = velocity.crossProduct(normal);
            Ogre::Radian angle = velocity.angleBetween(normal);
            item->setOrientation(Ogre::Quaternion::Quaternion(angle, rotationAxis));
            */
            item->setAcceleration(acceleration);
            item->setVelocity(velocity);
        }
    }
    
    bool SpaceBoundaries::isHumanPlayer(Pawn *item)
    {
        if(item != NULL)
        {
            if(item->getPlayer())
            {
                return item->getPlayer()->isHumanPlayer();
            }
        }
        return false;
    }
    
}