public class SluttyTree extends Script {

    private CachedNPC cache;

    @Override
    public int onLoop() throws InterruptedException {
        if (cache == null || cache.isDead()) {
            NPC npc = getNpcs().closest("Ent");
            if (npc != null) {
                cache = new CachedNPC(npc);
            }
        } else {
            cache.checkPosition(getBot());
            if (cache.isSafeSpotted(myPlayer())) {
                if (!myPlayer().isInteracting(cache.getNpc())) {
                    //TODO - Attack
                }
            } else {
                //TODO - Walk to position
            }
        }
        return 600;
    }

    @Override
    public void onPaint(Graphics2D g) {
        if (cache != null) cache.draw(g);
    }
}

class CachedNPC {

    private final NPC npc;
    private Position position;
    private Area area;
    private List<Polygon> polygons;

    public CachedNPC(NPC npc) {
        this.npc = npc;
    }

    public boolean isDead() {
        return npc == null || !npc.exists();
    }

    public void checkPosition(Bot bot) {
        Position pos = npc.getPosition();
        if (position == null || pos.distance(position) != 0) {
            this.position = pos;
            this.area = new Area(pos.getX(), pos.getY(), pos.getX() + 1, pos.getY() + 1);
            this.polygons = new ArrayList<>();
            this.area.getPositions().forEach(p -> this.polygons.add(p.getPolygon(bot)));
        }
    }

    public void draw(Graphics2D g) {
        if (polygons != null && polygons.size() > 0) {
            polygons.forEach(g::drawPolygon);
        }
    }

    public boolean isSafeSpotted(Player player) {
        if (!player.isUnderAttack()) {
            if (npc.isInteracting(player)) {
                if (!npc.isMoving()) {
                    return true;
                }
            }
        }
        return false;
    }

    public NPC getNpc() {
        return npc;
    }

    public Area getArea() {
        return area;
    }

}