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#include "spritegoalaffector.h"
#include "spriteparticle.h"
#include "spriteengine.h"
#include "spritestate.h"
#include <QDebug>

QT_BEGIN_NAMESPACE

SpriteGoalAffector::SpriteGoalAffector(QSGItem *parent) :
    ParticleAffector(parent), m_goalIdx(-1), m_jump(false)
{
}

void SpriteGoalAffector::updateStateIndex(SpriteEngine* e)
{
    m_lastEngine = e;
    for(int i=0; i<e->stateCount(); i++){
        if(e->state(i)->name() == m_goalState){
            m_goalIdx = i;
            return;
        }
    }
    m_goalIdx = -1;//Can't find it
}

void SpriteGoalAffector::setGoalState(QString arg)
{
    if (m_goalState != arg) {
        m_goalState = arg;
        emit goalStateChanged(arg);
        if(m_goalState.isEmpty())
            m_goalIdx = -1;
        else
            m_goalIdx = -2;
    }
}

bool SpriteGoalAffector::affectParticle(ParticleData *d, qreal dt)
{
    Q_UNUSED(dt);
    //TODO: Affect all engines
    SpriteEngine *engine = 0;
    foreach(ParticleType *p, m_system->m_groupData[d->group]->types)
        if(qobject_cast<SpriteParticle*>(p))
            engine = qobject_cast<SpriteParticle*>(p)->spriteEngine();
    if(!engine)
        return false;

    if(m_goalIdx == -2 || engine != m_lastEngine)
        updateStateIndex(engine);
    if(engine->spriteState(d->particleIndex) != m_goalIdx){
        engine->setGoal(m_goalIdx, d->particleIndex, m_jump);
        emit affected(QPointF(d->curX(), d->curY()));//###Expensive if unconnected? Move to Affector?
        return true; //Doesn't affect particle data, but necessary for onceOff
    }
    return false;
}

QT_END_NAMESPACE