package net.minecraft.util.datafix.fixes;

import com.google.common.collect.ImmutableMap;
import com.mojang.datafixers.DSL;
import com.mojang.datafixers.Typed;
import com.mojang.datafixers.schemas.Schema;
import com.mojang.datafixers.util.Pair;
import com.mojang.serialization.Dynamic;

public class MemoryExpiryDataFix extends NamedEntityFix {
	public MemoryExpiryDataFix(final Schema schema, final String entityType) {
		super(schema, false, "Memory expiry data fix (" + entityType + ")", References.ENTITY, entityType);
	}

	@Override
	protected Typed<?> fix(final Typed<?> entity) {
		return entity.update(DSL.remainderFinder(), this::fixTag);
	}

	public Dynamic<?> fixTag(final Dynamic<?> input) {
		return input.update("Brain", this::updateBrain);
	}

	private Dynamic<?> updateBrain(final Dynamic<?> input) {
		return input.update("memories", this::updateMemories);
	}

	private Dynamic<?> updateMemories(final Dynamic<?> memories) {
		return memories.updateMapValues(this::updateMemoryEntry);
	}

	private Pair<Dynamic<?>, Dynamic<?>> updateMemoryEntry(final Pair<Dynamic<?>, Dynamic<?>> memoryEntry) {
		return memoryEntry.mapSecond(this::wrapMemoryValue);
	}

	private Dynamic<?> wrapMemoryValue(final Dynamic<?> dynamic) {
		return dynamic.createMap(ImmutableMap.of(dynamic.createString("value"), dynamic));
	}
}