package net.minecraft.advancements.triggers;

import com.mojang.serialization.Codec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
import java.util.Collection;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
import net.minecraft.advancements.predicates.ContextAwarePredicate;
import net.minecraft.advancements.predicates.entity.EntityPredicate;
import net.minecraft.server.level.ServerPlayer;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.level.storage.loot.LootContext;
import net.minecraft.world.level.storage.loot.Validatable;
import net.minecraft.world.level.storage.loot.ValidationContextSource;

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

	public void trigger(final ServerPlayer player, final Collection<? extends Entity> victims) {
		List<LootContext> victimsContexts = (List<LootContext>)victims.stream().map(v -> EntityPredicate.createContext(player, v)).collect(Collectors.toList());
		this.trigger(player, t -> t.matches(victimsContexts));
	}

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

		public static Criterion<ChanneledLightningTrigger.TriggerInstance> channeledLightning(final EntityPredicate.Builder... victims) {
			return CriteriaTriggers.CHANNELED_LIGHTNING.createCriterion(new ChanneledLightningTrigger.TriggerInstance(Optional.empty(), EntityPredicate.wrap(victims)));
		}

		public boolean matches(final Collection<? extends LootContext> victims) {
			for (ContextAwarePredicate predicate : this.victims) {
				boolean found = false;

				for (LootContext victim : victims) {
					if (predicate.matches(victim)) {
						found = true;
						break;
					}
				}

				if (!found) {
					return false;
				}
			}

			return true;
		}

		@Override
		public void validate(final ValidationContextSource validator) {
			SimpleCriterionTrigger.SimpleInstance.super.validate(validator);
			Validatable.validate(validator.entityContext(), "victims", this.victims);
		}
	}
}