package net.minecraft.advancements.triggers;

import com.mojang.serialization.Codec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
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.entity.LightningBolt;
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 LightningStrikeTrigger extends SimpleCriterionTrigger<LightningStrikeTrigger.TriggerInstance> {
	@Override
	public Codec<LightningStrikeTrigger.TriggerInstance> codec() {
		return LightningStrikeTrigger.TriggerInstance.CODEC;
	}

	public void trigger(final ServerPlayer player, final LightningBolt lightning, final List<Entity> entitiesAround) {
		List<LootContext> entitiesAroundContexts = (List<LootContext>)entitiesAround.stream()
			.map(v -> EntityPredicate.createContext(player, v))
			.collect(Collectors.toList());
		LootContext lightningContext = EntityPredicate.createContext(player, lightning);
		this.trigger(player, t -> t.matches(lightningContext, entitiesAroundContexts));
	}

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

		public static Criterion<LightningStrikeTrigger.TriggerInstance> lightningStrike(
			final Optional<EntityPredicate> lightning, final Optional<EntityPredicate> bystander
		) {
			return CriteriaTriggers.LIGHTNING_STRIKE
				.createCriterion(new LightningStrikeTrigger.TriggerInstance(Optional.empty(), EntityPredicate.wrap(lightning), EntityPredicate.wrap(bystander)));
		}

		public boolean matches(final LootContext bolt, final List<LootContext> entitiesAround) {
			return this.lightning.isPresent() && !((ContextAwarePredicate)this.lightning.get()).matches(bolt)
				? false
				: !this.bystander.isPresent() || !entitiesAround.stream().noneMatch(((ContextAwarePredicate)this.bystander.get())::matches);
		}

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