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.types.templates.TaggedChoice.TaggedChoiceType;
import com.mojang.datafixers.util.Pair;
import com.mojang.serialization.Dynamic;
import java.util.Map;
import java.util.Optional;
import net.minecraft.util.Util;
import net.minecraft.util.datafix.LegacyComponentDataFixUtils;

public class BannerEntityCustomNameToOverrideComponentFix extends DataFix {
	public BannerEntityCustomNameToOverrideComponentFix(final Schema outputSchema) {
		super(outputSchema, false);
	}

	@Override
	public TypeRewriteRule makeRule() {
		Type<?> blockEntityType = this.getInputSchema().getType(References.BLOCK_ENTITY);
		TaggedChoiceType<?> blockEntityIdFinder = this.getInputSchema().findChoiceType(References.BLOCK_ENTITY);
		OpticFinder<?> customNameFinder = blockEntityType.findField("CustomName");
		OpticFinder<Pair<String, String>> textComponentFinder = DSL.typeFinder((Type<Pair<String, String>>)this.getInputSchema().getType(References.TEXT_COMPONENT));
		return this.fixTypeEverywhereTyped("Banner entity custom_name to item_name component fix", blockEntityType, input -> {
			Object blockEntityId = input.get(blockEntityIdFinder.finder()).getFirst();
			return blockEntityId.equals("minecraft:banner") ? this.fix(input, textComponentFinder, customNameFinder) : input;
		});
	}

	private Typed<?> fix(final Typed<?> input, final OpticFinder<Pair<String, String>> textComponentFinder, final OpticFinder<?> customNameFinder) {
		Optional<String> customName = input.getOptionalTyped(customNameFinder).flatMap(name -> name.getOptional(textComponentFinder).map(Pair::getSecond));
		boolean isOminousBanner = customName.flatMap(LegacyComponentDataFixUtils::extractTranslationString)
			.filter(e -> e.equals("block.minecraft.ominous_banner"))
			.isPresent();
		return isOminousBanner
			? Util.writeAndReadTypedOrThrow(
				input,
				input.getType(),
				dynamic -> {
					Dynamic<?> components = dynamic.createMap(
						Map.of(
							dynamic.createString("minecraft:item_name"),
							dynamic.createString((String)customName.get()),
							dynamic.createString("minecraft:hide_additional_tooltip"),
							dynamic.emptyMap()
						)
					);
					return dynamic.set("components", components).remove("CustomName");
				}
			)
			: input;
	}
}