Reach check ROCK

package cc.funkemunky.anticheat.impl.checks.combat;

import cc.funkemunky.anticheat.api.checks.CancelType;
import cc.funkemunky.anticheat.api.checks.Check;
import cc.funkemunky.anticheat.api.checks.CheckInfo;
import cc.funkemunky.anticheat.api.checks.CheckType;
import cc.funkemunky.anticheat.api.utils.CustomLocation;
import cc.funkemunky.anticheat.api.utils.Packets;
import cc.funkemunky.api.tinyprotocol.api.Packet;
import cc.funkemunky.api.utils.BoundingBox;
import cc.funkemunky.api.utils.Init;
import cc.funkemunky.api.utils.MiscUtils;
import lombok.val;
import org.bukkit.entity.LivingEntity;
import org.bukkit.event.Event;
import org.bukkit.util.Vector;

import java.util.stream.Collectors;

@CheckInfo(name = "Reach", type = CheckType.REACH, cancelType = CancelType.COMBAT, maxVL = 50)
@Init
@Packets(packets = {Packet.Client.POSITION_LOOK, Packet.Client.POSITION, Packet.Client.LOOK, Packet.Client.FLYING, Packet.Client.LEGACY_LOOK, Packet.Client.LEGACY_POSITION, Packet.Client.LEGACY_POSITION_LOOK})
public class Reach extends Check {

    private int vl;

    @Override
    public void onPacket(Object packet, String packetType, long timeStamp) {
        if(getData().getLastAttack().hasNotPassed(0) && getData().getTarget() != null && MiscUtils.entityDimensions.containsKey(getData().getTarget().getType())) {
            val move = getData().getMovementProcessor();

            val pastLocation = getData().getEntityPastLocation().getEstimatedLocation(getData().getTransPing(), 135L + (getData().getPing() - getData().getLastPing())).stream().map(loc -> getHitBox(getData().getTarget(), loc)).collect(Collectors.toList());

            val vecs = pastLocation.stream().map(BoundingBox::getMinimum).collect(Collectors.toList());

            vecs.addAll( pastLocation.stream().map(BoundingBox::getMaximum).collect(Collectors.toList()));

            val distance = (float) vecs.stream().mapToDouble(vec -> vec.distance(move.getTo().toVector())).min().orElse(0);

            if(distance > 3.45) {
                if(vl++ > 10) {
                    flag("distance=" + distance + " ping=" + getData().getTransPing(), true, true);
                }
            } else vl-= vl > 0 ? 1 : 0;
        }
    }

    @Override
    public void onBukkitEvent(Event event) {

    }

    private BoundingBox getHitBox(LivingEntity entity, CustomLocation loc) {
        val bounds = MiscUtils.entityDimensions.getOrDefault(entity.getType(), new Vector(1,1,1));

        return new BoundingBox(loc.toVector(), loc.toVector()).grow((float) bounds.getX(), 0, (float) bounds.getZ()).add(0,0,0,0, (float) bounds.getY(), 0);
    }
}