package net.minecraft.world.level.levelgen.placement;

import com.mojang.serialization.MapCodec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
import java.util.stream.Stream;
import net.minecraft.core.BlockPos;
import net.minecraft.util.RandomSource;
import net.minecraft.util.valueproviders.ConstantInt;
import net.minecraft.util.valueproviders.IntProvider;

public class RandomOffsetPlacement extends PlacementModifier {
	public static final MapCodec<RandomOffsetPlacement> CODEC = RecordCodecBuilder.mapCodec(
		instance -> instance.group(
				IntProvider.codec(-16, 16).fieldOf("xz_spread").forGetter(randomOffsetPlacement -> randomOffsetPlacement.xzSpread),
				IntProvider.codec(-16, 16).fieldOf("y_spread").forGetter(randomOffsetPlacement -> randomOffsetPlacement.ySpread)
			)
			.apply(instance, RandomOffsetPlacement::new)
	);
	private final IntProvider xzSpread;
	private final IntProvider ySpread;

	public static RandomOffsetPlacement of(IntProvider xzSpread, IntProvider ySpread) {
		return new RandomOffsetPlacement(xzSpread, ySpread);
	}

	public static RandomOffsetPlacement vertical(IntProvider ySpread) {
		return new RandomOffsetPlacement(ConstantInt.of(0), ySpread);
	}

	public static RandomOffsetPlacement horizontal(IntProvider xzSpread) {
		return new RandomOffsetPlacement(xzSpread, ConstantInt.of(0));
	}

	private RandomOffsetPlacement(IntProvider xzSpread, IntProvider ySpread) {
		this.xzSpread = xzSpread;
		this.ySpread = ySpread;
	}

	@Override
	public Stream<BlockPos> getPositions(PlacementContext context, RandomSource random, BlockPos pos) {
		int i = pos.getX() + this.xzSpread.sample(random);
		int j = pos.getY() + this.ySpread.sample(random);
		int k = pos.getZ() + this.xzSpread.sample(random);
		return Stream.of(new BlockPos(i, j, k));
	}

	@Override
	public PlacementModifierType<?> type() {
		return PlacementModifierType.RANDOM_OFFSET;
	}
}