package net.minecraft.util.datafix.fixes;

import com.mojang.datafixers.DSL;
import com.mojang.datafixers.DataFix;
import com.mojang.datafixers.TypeRewriteRule;
import com.mojang.datafixers.schemas.Schema;
import java.util.Locale;
import java.util.Optional;

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

	@Override
	public TypeRewriteRule makeRule() {
		return this.fixTypeEverywhereTyped(
			"OptionsLowerCaseLanguageFix", this.getInputSchema().getType(References.OPTIONS), input -> input.update(DSL.remainderFinder(), tag -> {
				Optional<String> lang = tag.get("lang").asString().result();
				return lang.isPresent() ? tag.set("lang", tag.createString(((String)lang.get()).toLowerCase(Locale.ROOT))) : tag;
			})
		);
	}
}