package net.minecraft.util.datafix.fixes;

import com.mojang.datafixers.DSL;
import com.mojang.datafixers.DataFix;
import com.mojang.datafixers.OpticFinder;
import com.mojang.datafixers.TypeRewriteRule;
import com.mojang.datafixers.Typed;
import com.mojang.datafixers.schemas.Schema;
import com.mojang.datafixers.types.Type;
import com.mojang.datafixers.util.Pair;
import com.mojang.serialization.Dynamic;
import java.util.Objects;
import java.util.Optional;
import net.minecraft.util.datafix.schemas.NamespacedSchema;

public class ItemStackMapIdFix extends DataFix {
	public ItemStackMapIdFix(final Schema outputSchema, final boolean changesType) {
		super(outputSchema, changesType);
	}

	@Override
	public TypeRewriteRule makeRule() {
		Type<?> itemStackType = this.getInputSchema().getType(References.ITEM_STACK);
		OpticFinder<Pair<String, String>> idF = DSL.fieldFinder("id", DSL.named(References.ITEM_NAME.typeName(), NamespacedSchema.namespacedString()));
		OpticFinder<?> tagF = itemStackType.findField("tag");
		return this.fixTypeEverywhereTyped("ItemInstanceMapIdFix", itemStackType, input -> {
			Optional<Pair<String, String>> id = input.getOptional(idF);
			if (id.isPresent() && Objects.equals(((Pair)id.get()).getSecond(), "minecraft:filled_map")) {
				Dynamic<?> rest = input.get(DSL.remainderFinder());
				Typed<?> tag = input.getOrCreateTyped(tagF);
				Dynamic<?> tagRest = tag.get(DSL.remainderFinder());
				tagRest = tagRest.set("map", tagRest.createInt(rest.get("Damage").asInt(0)));
				return input.set(tagF, tag.set(DSL.remainderFinder(), tagRest));
			} else {
				return input;
			}
		});
	}
}