package net.minecraft.client.gui.components.debug;

import java.util.Locale;
import net.fabricmc.api.EnvType;
import net.fabricmc.api.Environment;
import net.minecraft.client.Minecraft;
import net.minecraft.core.BlockPos;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.world.DifficultyInstance;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.chunk.LevelChunk;
import org.jspecify.annotations.Nullable;

@Environment(EnvType.CLIENT)
public class DebugEntryLocalDifficulty implements DebugScreenEntry {
	@Override
	public void display(
		final DebugScreenDisplayer displayer,
		@Nullable final Level serverOrClientLevel,
		@Nullable final LevelChunk clientChunk,
		@Nullable final LevelChunk serverChunk
	) {
		Minecraft minecraft = Minecraft.getInstance();
		Entity entity = minecraft.getCameraEntity();
		if (entity != null && serverChunk != null && serverOrClientLevel instanceof ServerLevel serverLevel) {
			BlockPos feetPos = entity.blockPosition();
			if (serverLevel.isInsideBuildHeight(feetPos.getY())) {
				float moonBrightness = serverLevel.getMoonBrightness(feetPos);
				long localTime = serverChunk.getInhabitedTime();
				DifficultyInstance localDifficulty = new DifficultyInstance(serverLevel.getDifficulty(), serverLevel.getOverworldClockTime(), localTime, moonBrightness);
				displayer.addLine(
					String.format(Locale.ROOT, "Local Difficulty: %.2f // %.2f", localDifficulty.getEffectiveDifficulty(), localDifficulty.getSpecialMultiplier())
				);
			}
		}
	}
}