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.schemas.Schema;
import com.mojang.datafixers.types.Type;
import com.mojang.datafixers.types.templates.List.ListType;
import net.minecraft.util.datafix.ExtraDataFixUtils;

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

	@Override
	protected TypeRewriteRule makeRule() {
		Type<?> type = this.getInputSchema().getType(References.SAVED_DATA_MAP_DATA);
		OpticFinder<?> dataF = type.findField("data");
		OpticFinder<?> bannersF = dataF.type().findField("banners");
		OpticFinder<?> bannerF = DSL.typeFinder(((ListType)bannersF.type()).getElement());
		return this.fixTypeEverywhereTyped(
			"MapBannerBlockPosFormatFix",
			type,
			input -> input.updateTyped(
				dataF,
				data -> data.updateTyped(
					bannersF,
					banners -> banners.updateTyped(
						bannerF, banner -> banner.update(DSL.remainderFinder(), bannerTag -> bannerTag.update("Pos", ExtraDataFixUtils::fixBlockPos))
					)
				)
			)
		);
	}
}