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.datafixers.types.templates.TaggedChoice.TaggedChoiceType;
import com.mojang.datafixers.util.Pair;
import net.minecraft.util.datafix.LegacyComponentDataFixUtils;
import net.minecraft.util.datafix.schemas.NamespacedSchema;

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

	@Override
	public TypeRewriteRule makeRule() {
		Type<?> blockEntityType = this.getInputSchema().getType(References.BLOCK_ENTITY);
		Type<?> itemStackType = this.getInputSchema().getType(References.ITEM_STACK);
		TaggedChoiceType<?> blockEntityIdFinder = this.getInputSchema().findChoiceType(References.BLOCK_ENTITY);
		OpticFinder<Pair<String, String>> itemStackIdFinder = DSL.fieldFinder("id", DSL.named(References.ITEM_NAME.typeName(), NamespacedSchema.namespacedString()));
		OpticFinder<?> blockEntityComponentsFieldFinder = blockEntityType.findField("components");
		OpticFinder<?> itemStackComponentsFieldFinder = itemStackType.findField("components");
		OpticFinder<?> itemNameFinder = blockEntityComponentsFieldFinder.type().findField("minecraft:item_name");
		OpticFinder<Pair<String, String>> textComponentFinder = DSL.typeFinder((Type<Pair<String, String>>)this.getInputSchema().getType(References.TEXT_COMPONENT));
		return TypeRewriteRule.seq(this.fixTypeEverywhereTyped("Ominous Banner block entity common rarity to uncommon rarity fix", blockEntityType, input -> {
			Object blockEntityId = input.get(blockEntityIdFinder.finder()).getFirst();
			return blockEntityId.equals("minecraft:banner") ? this.fix(input, blockEntityComponentsFieldFinder, itemNameFinder, textComponentFinder) : input;
		}), this.fixTypeEverywhereTyped("Ominous Banner item stack common rarity to uncommon rarity fix", itemStackType, input -> {
			String itemStackId = (String)input.getOptional(itemStackIdFinder).map(Pair::getSecond).orElse("");
			return itemStackId.equals("minecraft:white_banner") ? this.fix(input, itemStackComponentsFieldFinder, itemNameFinder, textComponentFinder) : input;
		}));
	}

	private Typed<?> fix(
		final Typed<?> input,
		final OpticFinder<?> componentsFieldFinder,
		final OpticFinder<?> itemNameFinder,
		final OpticFinder<Pair<String, String>> textComponentFinder
	) {
		return input.updateTyped(
			componentsFieldFinder,
			components -> {
				boolean isOminousBanner = components.getOptionalTyped(itemNameFinder)
					.flatMap(itemName -> itemName.getOptional(textComponentFinder))
					.map(Pair::getSecond)
					.flatMap(LegacyComponentDataFixUtils::extractTranslationString)
					.filter(e -> e.equals("block.minecraft.ominous_banner"))
					.isPresent();
				return isOminousBanner
					? components.updateTyped(
							itemNameFinder,
							itemName -> itemName.set(
								textComponentFinder,
								Pair.of(References.TEXT_COMPONENT.typeName(), LegacyComponentDataFixUtils.createTranslatableComponentJson("block.minecraft.ominous_banner"))
							)
						)
						.update(DSL.remainderFinder(), remainder -> remainder.set("minecraft:rarity", remainder.createString("uncommon")))
					: components;
			}
		);
	}
}