/*
 *   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:
 *      Fabian 'x3n' Landau
 *   Co-authors:
 *      Dominik Solenicki
 *
 */

#include "ArtificialController.h"
#include "core/CoreIncludes.h"
#include "worldentities/pawns/Pawn.h"


namespace orxonox
{

    ArtificialController::ArtificialController(BaseObject* creator) : FormationController(creator)
    {
          
    }

    ArtificialController::~ArtificialController()
    {
        
    }


    /**
        @brief Gets called when ControllableEntity is being changed. Resets the bot when it dies.
    */
    void ArtificialController::changedControllableEntity()
    {
        if (!this->getControllableEntity())
            this->removeFromFormation();
    }


    void ArtificialController::aimAtTarget()
    {
        if (!this->target_ || !this->getControllableEntity())
            return;

        static const float hardcoded_projectile_speed = 1250;

        this->targetPosition_ = getPredictedPosition(this->getControllableEntity()->getPosition(), hardcoded_projectile_speed, this->target_->getPosition(), this->target_->getVelocity());
        this->bHasTargetPosition_ = (this->targetPosition_ != Vector3::ZERO);

        Pawn* pawn = orxonox_cast<Pawn*>(this->getControllableEntity());
        if (pawn)
            pawn->setAimPosition(this->targetPosition_);
    }

    bool ArtificialController::isCloseAtTarget(float distance) const
    {
        if (!this->getControllableEntity())
            return false;

        if (!this->target_)
            return (this->getControllableEntity()->getPosition().squaredDistance(this->targetPosition_) < distance*distance);
        else
            return (this->getControllableEntity()->getPosition().squaredDistance(this->target_->getPosition()) < distance*distance);
    }

    bool ArtificialController::isLookingAtTarget(float angle) const
    {
        if (!this->getControllableEntity())
            return false;

        return (getAngle(this->getControllableEntity()->getPosition(), this->getControllableEntity()->getOrientation() * WorldEntity::FRONT, this->targetPosition_) < angle);
    }

    void ArtificialController::abandonTarget(Pawn* target)
    {
        if (target == this->target_)
            this->targetDied();
    }
 
}