package net.minecraft.advancements.triggers;

import com.mojang.serialization.Codec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
import java.util.Optional;
import net.minecraft.advancements.predicates.ContextAwarePredicate;
import net.minecraft.advancements.predicates.DistancePredicate;
import net.minecraft.advancements.predicates.LocationPredicate;
import net.minecraft.advancements.predicates.entity.EntityPredicate;
import net.minecraft.server.level.ServerLevel;
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;
import net.minecraft.world.phys.Vec3;
import org.jspecify.annotations.Nullable;

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

	public void trigger(final ServerPlayer player, final Vec3 startPosition, @Nullable final Entity cause) {
		Vec3 playerPosition = player.position();
		LootContext wrappedCause = cause != null ? EntityPredicate.createContext(player, cause) : null;
		this.trigger(player, t -> t.matches(player.level(), startPosition, playerPosition, wrappedCause));
	}

	public record TriggerInstance(
		Optional<ContextAwarePredicate> player,
		Optional<LocationPredicate> startPosition,
		Optional<DistancePredicate> distance,
		Optional<ContextAwarePredicate> cause
	) implements SimpleCriterionTrigger.SimpleInstance {
		public static final Codec<FallAfterExplosionTrigger.TriggerInstance> CODEC = RecordCodecBuilder.create(
			i -> i.group(
					EntityPredicate.ADVANCEMENT_CODEC.optionalFieldOf("player").forGetter(FallAfterExplosionTrigger.TriggerInstance::player),
					LocationPredicate.CODEC.optionalFieldOf("start_position").forGetter(FallAfterExplosionTrigger.TriggerInstance::startPosition),
					DistancePredicate.CODEC.optionalFieldOf("distance").forGetter(FallAfterExplosionTrigger.TriggerInstance::distance),
					EntityPredicate.ADVANCEMENT_CODEC.optionalFieldOf("cause").forGetter(FallAfterExplosionTrigger.TriggerInstance::cause)
				)
				.apply(i, FallAfterExplosionTrigger.TriggerInstance::new)
		);

		public static Criterion<FallAfterExplosionTrigger.TriggerInstance> fallAfterExplosion(final DistancePredicate distance, final EntityPredicate.Builder cause) {
			return CriteriaTriggers.FALL_AFTER_EXPLOSION
				.createCriterion(
					new FallAfterExplosionTrigger.TriggerInstance(Optional.empty(), Optional.empty(), Optional.of(distance), Optional.of(EntityPredicate.wrap(cause)))
				);
		}

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

		public boolean matches(final ServerLevel level, final Vec3 enteredPosition, final Vec3 playerPosition, @Nullable final LootContext cause) {
			if (this.startPosition.isPresent() && !((LocationPredicate)this.startPosition.get()).matches(level, enteredPosition.x, enteredPosition.y, enteredPosition.z)
				)
			 {
				return false;
			} else {
				return this.distance.isPresent()
						&& !((DistancePredicate)this.distance.get())
							.matches(enteredPosition.x, enteredPosition.y, enteredPosition.z, playerPosition.x, playerPosition.y, playerPosition.z)
					? false
					: !this.cause.isPresent() || cause != null && ((ContextAwarePredicate)this.cause.get()).matches(cause);
			}
		}
	}
}