/*
 *   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:
 *      Noah Zarro
 *      Theo von Arx
 *   Co-authors:
 *      
 *
 */

/**
    @file SOBGumbaBoss.cc
    @brief A Boss Gumba, which shoots small Gumbas
**/

#include "SOB.h"
#include "SOBGumba.h"
#include "SOBGumbaBoss.h"
#include "SOBFireball.h"
#include "SOBFigure.h"

#include "core/CoreIncludes.h"
#include "core/XMLPort.h"
#include "util/Output.h"
#include <BulletCollision/NarrowPhaseCollision/btManifoldPoint.h>



namespace orxonox
{
    RegisterClass(SOBGumbaBoss);

    SOBGumbaBoss::SOBGumbaBoss(Context* context) : SOBGumba(context)
    {
        RegisterObject(SOBGumbaBoss);

        gumbaMaxTime_   = 1;  // time after which a Gumba is shot
        gumbaTime_      = 0;  // time since last gumba was shot
        maxGumbas_      = 50; // Max Gumbas spawnable by a Boss
        jumpTimeMax_    = 5;  // time after which the gumba boss jumps
        jumpTime_       = 0;  // time since last jump of gumba boss
        
    }

    // PRE: otherObject collides with this.
    // POST: collision is handled: velocity changed, small gumbas murdered
    bool SOBGumbaBoss::collidesAgainst(WorldEntity* otherObject, const btCollisionShape* ownCollisionShape, btManifoldPoint& contactPoint) {

        SOBGumba*       gumba       = orxonox_cast<SOBGumba*>(otherObject);
        SOBGumbaBoss*   gumbaBoss   = orxonox_cast<SOBGumbaBoss*>(otherObject);

        // if boss collides with small gumbas, destroy them.
        if (gumba != nullptr && gumbaBoss == nullptr && !(gumba->hasCollided_)) {
            gumba->die();
        }


        //Every object with mass -1 does not change the direction of the GumbaBoss. For example the ground floor! The other objects switch the direction of the GumbaBoss.
        else if (changeAllowed_ && otherObject->getMass() != -1) {
            goesRight_ = !goesRight_;
            changeAllowed_ = false;
        }

        return true;
    }



    // POST: done what was to do in a time dt
    void SOBGumbaBoss::tick(float dt)
    {
        SUPER(SOBGumbaBoss, tick, dt);

        // increase timers:
        gumbaTime_ += dt;
        jumpTime_  += dt; 

        // set y-component of position of gumba boss to 0, so he doesn't fall in to the nothing
        Vector3 position = getPosition();
        position.y = 0;
        setPosition(position);


        if (!changeAllowed_) {
            changedOn_+= dt;
            // After a collision, we don't listen for collisions for 200ms - that's because one wall can cause several collisions!
            if (changedOn_> 0.200) {
                changeAllowed_ = true;
                changedOn_ = 0.0;

            }
        }
    

        if(gumbaTime_ > gumbaMaxTime_){ //Spawn Gumba
            int gumbaCounter=0;

            for (SOBGumba*  gumbaInstance : ObjectList<SOBGumba>())
            {
                if (gumbaInstance != nullptr && gumbaInstance->creator_==this)
                {
                    gumbaCounter++;
                }
            } 


            if(gumbaCounter<maxGumbas_){    //only maxGumbas are allowed at one time per Gumbaboss
                spawnGumba();
                gumbaTime_ = 0;
            }
        }

        int dir = 1;
        if (!goesRight_)
            dir = -1;

        // 
        if(getPosition().x < 1640)
            dir = 1;
        else if (getPosition().x > 1750)
            dir = -1;

        //change velocity
        Vector3 velocity = getVelocity();
        if(jumpTime_ > jumpTimeMax_){ // jump if the time has come.
            velocity.z = speed_*15;
            jumpTime_ = 0;
        }
        else{
            velocity.z -= gravityAcceleration_*dt;
        }
        velocity.x = dir*speed_;
        setVelocity(velocity);

        lastPos_ = getPosition();

    }

    // spawn gumbas
    void SOBGumbaBoss::spawnGumba() {
        SOBCenterpoint* center_ = ((SOB*)getGametype())->center_;

         SOBGumba* gumba = new SOBGumba(center_->getContext());
         Vector3 spawnpos = this->getWorldPosition();
         gumba->creator_=this;

         // we can shoot a gumba!
        if (gumba != nullptr && center_ != nullptr)
        {
            gumba->addTemplate("gumbaShootable");
            gumba->setDirection(goesRight_);
            if(goesRight_)
            {
                spawnpos.x+=20;
            }
            else
            {
                spawnpos.x-=20;
            }
            spawnpos.z+=15;
            gumba->setPosition(spawnpos);

        }

        Vector3 velocity = gumba->getVelocity();
        velocity.x += (2*goesRight_ -1) * 100;
        velocity.z += 200;
        gumba->setVelocity(velocity);
     }
}