/*
 *   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:
 *      Reto Grieder
 *   Co-authors:
 *      Martin Stypinski
 *
 */

#ifndef _MobileEntity_H__
#define _MobileEntity_H__

#include "OrxonoxPrereqs.h"

#include "util/Math.h"
#include "tools/interfaces/Tickable.h"
#include "WorldEntity.h"

namespace orxonox
{
    class _OrxonoxExport MobileEntity : public WorldEntity, public Tickable
    {
        public:
            MobileEntity(BaseObject* creator);
            virtual ~MobileEntity();

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

            virtual void setPosition(const Vector3& position);
            virtual void setOrientation(const Quaternion& orientation);

            virtual void setVelocity(const Vector3& velocity);
            inline void setVelocity(float x, float y, float z)
                { this->setVelocity(Vector3(x, y, z)); }
            inline const Vector3& getVelocity() const
                { return this->linearVelocity_; }
            inline Vector3 getLocalVelocity() const
                { return (this->getOrientation().Inverse() * this->getVelocity()); }

            virtual void setAngularVelocity(const Vector3& velocity);
            inline void setAngularVelocity(float x, float y, float z)
                { this->setAngularVelocity(Vector3(x, y, z)); }
            inline const Vector3& getAngularVelocity() const
                { return this->angularVelocity_; }

            void setAcceleration(const Vector3& acceleration);
            inline void setAcceleration(float x, float y, float z)
                { this->setAcceleration(Vector3(x, y, z)); }
            inline const Vector3& getAcceleration() const
                { return this->linearAcceleration_; }

            // Added for making N engines work with spaceships
            void addAcceleration(const Vector3& acceleration, const Vector3 &relativePosition);
            inline void addAcceleration(float x, float y, float z)
                { this->addAcceleration(Vector3(x, y, z), Vector3(0,0,0)); }
            // Getter function above

            void setAngularAcceleration(const Vector3& acceleration);
            inline void setAngularAcceleration(float x, float y, float z)
                { this->setAngularAcceleration(Vector3(x, y, z)); }
            inline const Vector3& getAngularAcceleration() const
                { return this->angularAcceleration_; }

            void applyCentralForce(const Vector3& force);
            inline void applyCentralForce(float x, float y, float z)
                { this->applyCentralForce(Vector3(x, y, z)); }

            inline void setRotationRate(Degree rate)
                { this->setAngularVelocity(this->getAngularVelocity().normalisedCopy() * rate.valueRadians()); }
            inline Degree getRotationRate() const
                { return Radian(this->getAngularVelocity().length()); }

            inline void setRotationAxis(const Vector3& axis)
                { this->setAngularVelocity(axis * this->getAngularVelocity().length()); }
            inline Vector3 getRotationAxis() const
                { return this->getAngularVelocity().normalisedCopy(); }

        protected:
            // Bullet btMotionState related
            virtual void setWorldTransform(const btTransform& worldTrans);
            void getWorldTransform(btTransform& worldTrans) const;

            Vector3 linearAcceleration_;
            Vector3 linearVelocity_;
            Vector3 angularAcceleration_;
            Vector3 angularVelocity_;

        private:
            virtual bool isCollisionTypeLegal(WorldEntity::CollisionType type) const;
    };
}

#endif /* _MobileEntity_H__ */