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.Typed;
import com.mojang.datafixers.schemas.Schema;
import com.mojang.serialization.Dynamic;
import java.util.Optional;

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

	@Override
	protected TypeRewriteRule makeRule() {
		return this.fixTypeEverywhereTyped("CarvingStepRemoveFix", this.getInputSchema().getType(References.CHUNK), CarvingStepRemoveFix::fixChunk);
	}

	private static Typed<?> fixChunk(final Typed<?> input) {
		return input.update(DSL.remainderFinder(), chunkIn -> {
			Dynamic<?> chunk = chunkIn;
			Optional<? extends Dynamic<?>> carvingMasks = chunkIn.get("CarvingMasks").result();
			if (carvingMasks.isPresent()) {
				Optional<? extends Dynamic<?>> mask = ((Dynamic)carvingMasks.get()).get("AIR").result();
				if (mask.isPresent()) {
					chunk = chunkIn.set("carving_mask", (Dynamic<?>)mask.get());
				}
			}

			return chunk.remove("CarvingMasks");
		});
	}
}