package net.minecraft.advancements.critereon;

import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
import com.mojang.serialization.Codec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import net.minecraft.advancements.CriteriaTriggers;
import net.minecraft.advancements.Criterion;
import net.minecraft.server.level.ServerPlayer;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.EntityType;
import net.minecraft.world.level.storage.loot.LootContext;

public class KilledByCrossbowTrigger extends SimpleCriterionTrigger<KilledByCrossbowTrigger.TriggerInstance> {
	@Override
	public Codec<KilledByCrossbowTrigger.TriggerInstance> codec() {
		return KilledByCrossbowTrigger.TriggerInstance.CODEC;
	}

	public void trigger(ServerPlayer player, Collection<Entity> entities) {
		List<LootContext> list = Lists.<LootContext>newArrayList();
		Set<EntityType<?>> set = Sets.<EntityType<?>>newHashSet();

		for (Entity entity : entities) {
			set.add(entity.getType());
			list.add(EntityPredicate.createContext(player, entity));
		}

		this.trigger(player, triggerInstance -> triggerInstance.matches(list, set.size()));
	}

	public record TriggerInstance(Optional<ContextAwarePredicate> player, List<ContextAwarePredicate> victims, MinMaxBounds.Ints uniqueEntityTypes)
		implements SimpleCriterionTrigger.SimpleInstance {
		public static final Codec<KilledByCrossbowTrigger.TriggerInstance> CODEC = RecordCodecBuilder.create(
			instance -> instance.group(
					EntityPredicate.ADVANCEMENT_CODEC.optionalFieldOf("player").forGetter(KilledByCrossbowTrigger.TriggerInstance::player),
					EntityPredicate.ADVANCEMENT_CODEC.listOf().optionalFieldOf("victims", List.of()).forGetter(KilledByCrossbowTrigger.TriggerInstance::victims),
					MinMaxBounds.Ints.CODEC
						.optionalFieldOf("unique_entity_types", MinMaxBounds.Ints.ANY)
						.forGetter(KilledByCrossbowTrigger.TriggerInstance::uniqueEntityTypes)
				)
				.apply(instance, KilledByCrossbowTrigger.TriggerInstance::new)
		);

		public static Criterion<KilledByCrossbowTrigger.TriggerInstance> crossbowKilled(EntityPredicate.Builder... victims) {
			return CriteriaTriggers.KILLED_BY_CROSSBOW
				.createCriterion(new KilledByCrossbowTrigger.TriggerInstance(Optional.empty(), EntityPredicate.wrap(victims), MinMaxBounds.Ints.ANY));
		}

		public static Criterion<KilledByCrossbowTrigger.TriggerInstance> crossbowKilled(MinMaxBounds.Ints uniqueEntityTypes) {
			return CriteriaTriggers.KILLED_BY_CROSSBOW.createCriterion(new KilledByCrossbowTrigger.TriggerInstance(Optional.empty(), List.of(), uniqueEntityTypes));
		}

		public boolean matches(Collection<LootContext> contexts, int bounds) {
			if (!this.victims.isEmpty()) {
				List<LootContext> list = Lists.<LootContext>newArrayList(contexts);

				for (ContextAwarePredicate contextAwarePredicate : this.victims) {
					boolean bl = false;
					Iterator<LootContext> iterator = list.iterator();

					while (iterator.hasNext()) {
						LootContext lootContext = (LootContext)iterator.next();
						if (contextAwarePredicate.matches(lootContext)) {
							iterator.remove();
							bl = true;
							break;
						}
					}

					if (!bl) {
						return false;
					}
				}
			}

			return this.uniqueEntityTypes.matches(bounds);
		}

		@Override
		public void validate(CriterionValidator validator) {
			SimpleCriterionTrigger.SimpleInstance.super.validate(validator);
			validator.validateEntities(this.victims, ".victims");
		}
	}
}