package net.minecraft.client.renderer.blockentity;

import it.unimi.dsi.fastutil.ints.Int2IntFunction;
import net.fabricmc.api.EnvType;
import net.fabricmc.api.Environment;
import net.minecraft.client.renderer.LevelRenderer;
import net.minecraft.client.renderer.LightTexture;
import net.minecraft.world.level.block.DoubleBlockCombiner.Combiner;
import net.minecraft.world.level.block.entity.BlockEntity;

@Environment(EnvType.CLIENT)
public class BrightnessCombiner<S extends BlockEntity> implements Combiner<S, Int2IntFunction> {
	public Int2IntFunction acceptDouble(S blockEntity, S blockEntity2) {
		return i -> {
			int j = LevelRenderer.getLightColor(blockEntity.getLevel(), blockEntity.getBlockPos());
			int k = LevelRenderer.getLightColor(blockEntity2.getLevel(), blockEntity2.getBlockPos());
			int l = LightTexture.block(j);
			int m = LightTexture.block(k);
			int n = LightTexture.sky(j);
			int o = LightTexture.sky(k);
			return LightTexture.pack(Math.max(l, m), Math.max(n, o));
		};
	}

	public Int2IntFunction acceptSingle(S blockEntity) {
		return i -> i;
	}

	public Int2IntFunction acceptNone() {
		return i -> i;
	}
}