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

import com.mojang.blaze3d.systems.GpuSurface;
import java.util.Locale;
import java.util.Optional;
import net.fabricmc.api.EnvType;
import net.fabricmc.api.Environment;
import net.minecraft.client.Minecraft;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.chunk.LevelChunk;
import org.jspecify.annotations.Nullable;

@Environment(EnvType.CLIENT)
public class DebugEntryFps 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();
		int framerateLimit = minecraft.getFramerateLimitTracker().getFramerateLimit();
		Optional<GpuSurface.Configuration> surfaceConfiguration = minecraft.windowSurface().currentConfiguration();
		displayer.addPriorityLine(
			String.format(
				Locale.ROOT,
				"%d fps T: %s%s",
				minecraft.getFps(),
				framerateLimit == 260 ? "inf" : framerateLimit,
				presentModeName((GpuSurface.PresentMode)surfaceConfiguration.map(GpuSurface.Configuration::presentMode).orElse(null))
			)
		);
	}

	@Override
	public boolean isAllowed(final boolean reducedDebugInfo) {
		return true;
	}

	private static String presentModeName(@Nullable final GpuSurface.PresentMode mode) {
		return switch (mode) {
			case null -> "";
			case IMMEDIATE -> " (immediate)";
			case MAILBOX -> " (mailbox)";
			case FIFO -> " (fifo)";
			case FIFO_RELAXED -> " (fifo relaxed)";
		};
	}
}