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.serialization.Dynamic;
import com.mojang.serialization.DynamicOps;
import java.util.Optional;
import net.minecraft.Util;
import net.minecraft.util.datafix.ExtraDataFixUtils;
import net.minecraft.util.datafix.LegacyComponentDataFixUtils;
import net.minecraft.util.datafix.schemas.NamespacedSchema;

public class EntityCustomNameToComponentFix extends DataFix {
	public EntityCustomNameToComponentFix(Schema outputSchema) {
		super(outputSchema, true);
	}

	@Override
	public TypeRewriteRule makeRule() {
		Type<?> type = this.getInputSchema().getType(References.ENTITY);
		Type<?> type2 = this.getOutputSchema().getType(References.ENTITY);
		OpticFinder<String> opticFinder = DSL.fieldFinder("id", NamespacedSchema.namespacedString());
		OpticFinder<String> opticFinder2 = (OpticFinder<String>)type.findField("CustomName");
		Type<?> type3 = type2.findFieldType("CustomName");
		return this.fixTypeEverywhereTyped("EntityCustomNameToComponentFix", type, type2, typed -> fixEntity(typed, type2, opticFinder, opticFinder2, type3));
	}

	private static <T> Typed<?> fixEntity(Typed<?> data, Type<?> entityType, OpticFinder<String> customNameOptic, OpticFinder<String> idOptic, Type<T> newType) {
		Optional<String> optional = data.getOptional(idOptic);
		if (optional.isEmpty()) {
			return ExtraDataFixUtils.cast(entityType, data);
		} else if (((String)optional.get()).isEmpty()) {
			return Util.writeAndReadTypedOrThrow(data, entityType, dynamicx -> dynamicx.remove("CustomName"));
		} else {
			String string = (String)data.getOptional(customNameOptic).orElse("");
			Dynamic<?> dynamic = fixCustomName(data.getOps(), (String)optional.get(), string);
			return data.set(idOptic, Util.readTypedOrThrow(newType, dynamic));
		}
	}

	private static <T> Dynamic<T> fixCustomName(DynamicOps<T> ops, String customName, String id) {
		return "minecraft:commandblock_minecart".equals(id)
			? new Dynamic<>(ops, ops.createString(customName))
			: LegacyComponentDataFixUtils.createPlainTextComponent(ops, customName);
	}
}