/*
 *   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 "WingmanController.h"


namespace orxonox
{

    RegisterClass(WingmanController);
    
    //CommonController contains all common functionality of AI Controllers
    WingmanController::WingmanController(Context* context) : CommonController(context)
    {
        RegisterObject(WingmanController);
        this->actionTimer_.setTimer(ACTION_INTERVAL, true, createExecutor(createFunctor(&WingmanController::action, this)));
        this->myLeader_ = 0;
        this->rank_ = Rank::WINGMAN;
    }

    WingmanController::~WingmanController()
    {

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

        //XMLPortParam(SectionController, "target_", setTarget, getTarget, xmlelement, mode).defaultValues(100.0f);
    }
    
    //----in tick, move (or look) and shoot----
    void WingmanController::tick(float dt)
    {   
        if (!this->isActive())
            return;
        if (this->bHasTargetPosition_)
        {
            this->moveToTargetPosition(dt);
        }
        else if (this->bLookAtTarget_)
        {
            this->lookAtTarget(dt);
        }
        if (bShooting_)
        {
            this->doFire();
        }
        
        SUPER(WingmanController, tick, dt);
    }
    
    //----action for hard calculations----
    void WingmanController::action()
    {
        //----If no leader, find one----
        if (!this->myLeader_)
        {
            CommonController* newLeader = findNewLeader();
            this->myLeader_ = newLeader;
            if (newLeader)
            {
                //orxout(internal_error) << "new Leader set" << endl;
            }
            //----If no leader found, attack someone----
            //----TODO: find closest enemy----
            else
            {
                if ( !this->hasTarget() || this->action_ != Action::FIGHT )
                {
                    for (ObjectList<Pawn>::iterator itP = ObjectList<Pawn>::begin(); itP; ++itP)
                    {
                        if ( CommonController::sameTeam (this->getControllableEntity(), static_cast<ControllableEntity*>(*itP)) )
                            continue;   
                        this->setAction(Action::FIGHT, (*itP));
                        break;
                    }
                }
            }
        }
        //----If have leader, he will deal with logic----
        else
        {

        }


        //----action was set to fight----
        if (this->action_ == Action::FIGHT)
        {
            //----choose where to go----
            this->maneuver();
            //----fire if you can----
            this->bShooting_ = this->canFire();
        }
        //----action was set to fly, leader handles the logic----
        else if (this->action_ == Action::FLY)
        {

        }
        //----TODO: implement protect----
        else if (this->action_ == Action::PROTECT)
        {

        }
          
    }
     
   
    
    //----POST: closest leader that is ready to take a new wingman is returned----
    CommonController* WingmanController::findNewLeader()
    {

        if (!this->getControllableEntity())
            return 0;

        //----vars for finding the closest leader----
        CommonController* closestLeader = 0;
        float minDistance =  std::numeric_limits<float>::infinity();

        for (ObjectList<CommonController>::iterator it = ObjectList<CommonController>::begin(); it; ++it)
        {
            //----0ptr or not a leader or dead?----
            if (!it || 
                (it->getRank() != Rank::SECTIONLEADER && it->getRank() != Rank::DIVISIONLEADER) || 
                !(it->getControllableEntity()))
                continue;
            
            //----same team?----
            if ( !CommonController::sameTeam (this->getControllableEntity(), (it)->getControllableEntity()) )
                continue;
            
            //----check distance----
            float distance = CommonController::distance (it->getControllableEntity(), this->getControllableEntity());
            if (distance < minDistance && !(it->hasWingman()))
            {
                closestLeader = *it;
                minDistance = distance;
            }
           
        }
        if (closestLeader)
        {
            //----Racing conditions----
            if (closestLeader->setWingman(this))
                return closestLeader;
        }
        return 0;
    }




}