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.ItemPredicate;
import net.minecraft.advancements.predicates.entity.EntityPredicate;
import net.minecraft.server.level.ServerPlayer;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.item.ItemInstance;
import net.minecraft.world.item.ItemStack;
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 org.jspecify.annotations.Nullable;

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

	public void trigger(final ServerPlayer player, final ItemStack itemStack, @Nullable final Entity entity) {
		LootContext context = EntityPredicate.createContext(player, entity);
		this.trigger(player, t -> t.matches(player, itemStack, context));
	}

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

		public static Criterion<PickedUpItemTrigger.TriggerInstance> thrownItemPickedUpByEntity(
			final Optional<ContextAwarePredicate> player, final Optional<ItemPredicate> item, final Optional<ContextAwarePredicate> entity
		) {
			return CriteriaTriggers.THROWN_ITEM_PICKED_UP_BY_ENTITY.createCriterion(new PickedUpItemTrigger.TriggerInstance(player, item, entity));
		}

		public static Criterion<PickedUpItemTrigger.TriggerInstance> thrownItemPickedUpByPlayer(
			final Optional<ContextAwarePredicate> player, final Optional<ItemPredicate> item, final Optional<ContextAwarePredicate> entity
		) {
			return CriteriaTriggers.THROWN_ITEM_PICKED_UP_BY_PLAYER.createCriterion(new PickedUpItemTrigger.TriggerInstance(player, item, entity));
		}

		public boolean matches(final ServerPlayer player, final ItemStack itemStack, final LootContext pickedUpBy) {
			return this.item.isPresent() && !((ItemPredicate)this.item.get()).test((ItemInstance)itemStack)
				? false
				: !this.entity.isPresent() || ((ContextAwarePredicate)this.entity.get()).matches(pickedUpBy);
		}

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