package net.minecraft.world.entity.ai.sensing;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import java.util.List;
import java.util.Set;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.world.entity.EntityType;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.ai.memory.MemoryModuleType;
import net.minecraft.world.entity.ai.memory.NearestVisibleLivingEntities;

public class VillagerBabiesSensor extends Sensor<LivingEntity> {
	@Override
	public Set<MemoryModuleType<?>> requires() {
		return ImmutableSet.of(MemoryModuleType.VISIBLE_VILLAGER_BABIES);
	}

	@Override
	protected void doTick(ServerLevel level, LivingEntity entity) {
		entity.getBrain().setMemory(MemoryModuleType.VISIBLE_VILLAGER_BABIES, this.getNearestVillagerBabies(entity));
	}

	private List<LivingEntity> getNearestVillagerBabies(LivingEntity livingEntity) {
		return ImmutableList.copyOf(this.getVisibleEntities(livingEntity).findAll(this::isVillagerBaby));
	}

	private boolean isVillagerBaby(LivingEntity livingEntity) {
		return livingEntity.getType() == EntityType.VILLAGER && livingEntity.isBaby();
	}

	private NearestVisibleLivingEntities getVisibleEntities(LivingEntity livingEntity) {
		return (NearestVisibleLivingEntities)livingEntity.getBrain()
			.getMemory(MemoryModuleType.NEAREST_VISIBLE_LIVING_ENTITIES)
			.orElse(NearestVisibleLivingEntities.empty());
	}
}