package net.minecraft.util.datafix.fixes;

import com.mojang.datafixers.DSL;
import com.mojang.datafixers.DataFix;
import com.mojang.datafixers.DataFixUtils;
import com.mojang.datafixers.TypeRewriteRule;
import com.mojang.datafixers.DSL.TypeReference;
import com.mojang.datafixers.schemas.Schema;
import com.mojang.datafixers.types.Type;

public class AddFlagIfNotPresentFix extends DataFix {
	private final String name;
	private final boolean flagValue;
	private final String flagKey;
	private final TypeReference typeReference;

	public AddFlagIfNotPresentFix(final Schema outputSchema, final TypeReference typeReference, final String flagKey, final boolean flagValue) {
		super(outputSchema, true);
		this.flagValue = flagValue;
		this.flagKey = flagKey;
		this.name = "AddFlagIfNotPresentFix_" + this.flagKey + "=" + this.flagValue + " for " + outputSchema.getVersionKey();
		this.typeReference = typeReference;
	}

	@Override
	protected TypeRewriteRule makeRule() {
		Type<?> worldGenSettingsType = this.getInputSchema().getType(this.typeReference);
		return this.fixTypeEverywhereTyped(
			this.name,
			worldGenSettingsType,
			settings -> settings.update(
				DSL.remainderFinder(), tag -> tag.set(this.flagKey, DataFixUtils.orElseGet(tag.get(this.flagKey).result(), () -> tag.createBoolean(this.flagValue)))
			)
		);
	}
}