package net.minecraft.util.datafix.fixes;

import com.google.common.collect.ImmutableMap;
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.serialization.Dynamic;
import java.util.Map;
import java.util.Objects;

public class ChunkStatusFix2 extends DataFix {
	private static final Map<String, String> RENAMES_AND_DOWNGRADES = ImmutableMap.<String, String>builder()
		.put("structure_references", "empty")
		.put("biomes", "empty")
		.put("base", "surface")
		.put("carved", "carvers")
		.put("liquid_carved", "liquid_carvers")
		.put("decorated", "features")
		.put("lighted", "light")
		.put("mobs_spawned", "spawn")
		.put("finalized", "heightmaps")
		.put("fullchunk", "full")
		.build();

	public ChunkStatusFix2(final Schema schema, final boolean changesType) {
		super(schema, changesType);
	}

	@Override
	protected TypeRewriteRule makeRule() {
		Type<?> chunkType = this.getInputSchema().getType(References.CHUNK);
		Type<?> levelType = chunkType.findFieldType("Level");
		OpticFinder<?> levelF = DSL.fieldFinder("Level", levelType);
		return this.fixTypeEverywhereTyped(
			"ChunkStatusFix2", chunkType, this.getOutputSchema().getType(References.CHUNK), input -> input.updateTyped(levelF, level -> {
				Dynamic<?> tag = level.get(DSL.remainderFinder());
				String status = tag.get("Status").asString("empty");
				String newStatus = (String)RENAMES_AND_DOWNGRADES.getOrDefault(status, "empty");
				return Objects.equals(status, newStatus) ? level : level.set(DSL.remainderFinder(), tag.set("Status", tag.createString(newStatus)));
			})
		);
	}
}