package net.minecraft.client.server;

import com.mojang.logging.LogUtils;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.nio.charset.StandardCharsets;
import java.util.concurrent.atomic.AtomicInteger;
import net.fabricmc.api.EnvType;
import net.fabricmc.api.Environment;
import net.minecraft.DefaultUncaughtExceptionHandler;
import org.slf4j.Logger;

@Environment(EnvType.CLIENT)
public class LanServerPinger extends Thread {
	private static final AtomicInteger UNIQUE_THREAD_ID = new AtomicInteger(0);
	private static final Logger LOGGER = LogUtils.getLogger();
	public static final String MULTICAST_GROUP = "224.0.2.60";
	public static final int PING_PORT = 4445;
	private static final long PING_INTERVAL = 1500L;
	private final String motd;
	private final DatagramSocket socket;
	private boolean isRunning = true;
	private final String serverAddress;

	public LanServerPinger(String motd, String serverAddress) throws IOException {
		super("LanServerPinger #" + UNIQUE_THREAD_ID.incrementAndGet());
		this.motd = motd;
		this.serverAddress = serverAddress;
		this.setDaemon(true);
		this.setUncaughtExceptionHandler(new DefaultUncaughtExceptionHandler(LOGGER));
		this.socket = new DatagramSocket();
	}

	public void run() {
		String string = createPingString(this.motd, this.serverAddress);
		byte[] bs = string.getBytes(StandardCharsets.UTF_8);

		while (!this.isInterrupted() && this.isRunning) {
			try {
				InetAddress inetAddress = InetAddress.getByName("224.0.2.60");
				DatagramPacket datagramPacket = new DatagramPacket(bs, bs.length, inetAddress, 4445);
				this.socket.send(datagramPacket);
			} catch (IOException var6) {
				LOGGER.warn("LanServerPinger: {}", var6.getMessage());
				break;
			}

			try {
				sleep(1500L);
			} catch (InterruptedException var5) {
			}
		}
	}

	public void interrupt() {
		super.interrupt();
		this.isRunning = false;
	}

	public static String createPingString(String motdMessage, String adMessage) {
		return "[MOTD]" + motdMessage + "[/MOTD][AD]" + adMessage + "[/AD]";
	}

	public static String parseMotd(String pingResponse) {
		int i = pingResponse.indexOf("[MOTD]");
		if (i < 0) {
			return "missing no";
		} else {
			int j = pingResponse.indexOf("[/MOTD]", i + "[MOTD]".length());
			return j < i ? "missing no" : pingResponse.substring(i + "[MOTD]".length(), j);
		}
	}

	public static String parseAddress(String pingResponse) {
		int i = pingResponse.indexOf("[/MOTD]");
		if (i < 0) {
			return null;
		} else {
			int j = pingResponse.indexOf("[/MOTD]", i + "[/MOTD]".length());
			if (j >= 0) {
				return null;
			} else {
				int k = pingResponse.indexOf("[AD]", i + "[/MOTD]".length());
				if (k < 0) {
					return null;
				} else {
					int l = pingResponse.indexOf("[/AD]", k + "[AD]".length());
					return l < k ? null : pingResponse.substring(k + "[AD]".length(), l);
				}
			}
		}
	}
}