package net.minecraft.util.datafix.fixes;

import com.google.common.collect.ImmutableSet;
import com.mojang.datafixers.DSL;
import com.mojang.datafixers.DataFix;
import com.mojang.datafixers.DataFixUtils;
import com.mojang.datafixers.TypeRewriteRule;
import com.mojang.datafixers.schemas.Schema;
import com.mojang.serialization.Dynamic;
import java.util.Set;

public class WallPropertyFix extends DataFix {
	private static final Set<String> WALL_BLOCKS = ImmutableSet.of(
		"minecraft:andesite_wall",
		"minecraft:brick_wall",
		"minecraft:cobblestone_wall",
		"minecraft:diorite_wall",
		"minecraft:end_stone_brick_wall",
		"minecraft:granite_wall",
		"minecraft:mossy_cobblestone_wall",
		"minecraft:mossy_stone_brick_wall",
		"minecraft:nether_brick_wall",
		"minecraft:prismarine_wall",
		"minecraft:red_nether_brick_wall",
		"minecraft:red_sandstone_wall",
		"minecraft:sandstone_wall",
		"minecraft:stone_brick_wall"
	);

	public WallPropertyFix(final Schema outputSchema, final boolean changesType) {
		super(outputSchema, changesType);
	}

	@Override
	public TypeRewriteRule makeRule() {
		return this.fixTypeEverywhereTyped(
			"WallPropertyFix",
			this.getInputSchema().getType(References.BLOCK_STATE),
			input -> input.update(DSL.remainderFinder(), WallPropertyFix::upgradeBlockStateTag)
		);
	}

	private static String mapProperty(final String value) {
		return "true".equals(value) ? "low" : "none";
	}

	private static <T> Dynamic<T> fixWallProperty(final Dynamic<T> state, final String property) {
		return state.update(property, value -> DataFixUtils.orElse(value.asString().result().map(WallPropertyFix::mapProperty).map(value::createString), value));
	}

	private static <T> Dynamic<T> upgradeBlockStateTag(final Dynamic<T> state) {
		boolean isWall = state.get("Name").asString().result().filter(WALL_BLOCKS::contains).isPresent();
		return !isWall ? state : state.update("Properties", properties -> {
			Dynamic<?> newState = fixWallProperty(properties, "east");
			newState = fixWallProperty(newState, "west");
			newState = fixWallProperty(newState, "north");
			return fixWallProperty(newState, "south");
		});
	}
}