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package gregtech.api.util;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import net.minecraft.entity.EnumCreatureType;
import net.minecraft.entity.monster.EntitySlime;
import net.minecraft.tileentity.TileEntity;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.event.entity.living.LivingSpawnEvent.CheckSpawn;
import cpw.mods.fml.common.eventhandler.Event;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import gregtech.api.enums.GT_Values;
import gregtech.api.metatileentity.BaseMetaTileEntity;
import gregtech.common.tileentities.machines.basic.GT_MetaTileEntity_MonsterRepellent;
public class GT_SpawnEventHandler {
public static volatile List<int[]> mobReps = new CopyOnWriteArrayList<>();
// Future Optimiztation ideas, if this isn't sufficient
// 1: Keep a weakref list of mob repellents so we already have the tile
// 2: Have the tick method update a HashMap of (int[], range) so we don't have to load the tile at all
public GT_SpawnEventHandler() {
MinecraftForge.EVENT_BUS.register(this);
}
// Range of a powered repellent
public static int getPoweredRepellentRange(int aTier) {
return 16 + (48 * aTier);
}
// Range of an unpowered repellent
public static int getUnpoweredRepellentRange(int aTier) {
return 4 + (12 * aTier);
}
@SubscribeEvent
public void denyMobSpawn(CheckSpawn event) {
if (event.getResult() == Event.Result.DENY) return;
if (event.entityLiving instanceof EntitySlime slime && !slime.hasCustomNameTag()
&& event.getResult() == Event.Result.ALLOW) {
event.setResult(Event.Result.DEFAULT);
}
if (event.getResult() == Event.Result.ALLOW) {
return;
}
if (event.entityLiving.isCreatureType(EnumCreatureType.monster, false)) {
final double maxRangeCheck = Math.pow(getPoweredRepellentRange(GT_Values.V.length - 1), 2);
for (int[] rep : mobReps) {
if (rep[3] == event.entity.worldObj.provider.dimensionId) {
// If the chunk isn't loaded, we ignore this Repellent
if (!event.entity.worldObj.blockExists(rep[0], rep[1], rep[2])) continue;
final double dx = rep[0] + 0.5F - event.entity.posX;
final double dy = rep[1] + 0.5F - event.entity.posY;
final double dz = rep[2] + 0.5F - event.entity.posZ;
final double check = (dx * dx + dz * dz + dy * dy);
// Fail early if outside of max range
if (check > maxRangeCheck) continue;
final TileEntity tTile = event.entity.worldObj.getTileEntity(rep[0], rep[1], rep[2]);
if (tTile instanceof BaseMetaTileEntity metaTile
&& metaTile.getMetaTileEntity() instanceof GT_MetaTileEntity_MonsterRepellent repellent
&& check <= Math.pow(repellent.mRange, 2)) {
if (event.entityLiving instanceof EntitySlime slime) {
slime.setCustomNameTag("DoNotSpawnSlimes");
}
event.setResult(Event.Result.DENY);
// We're already DENYing it. No reason to keep checking
return;
}
}
}
}
}
}
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