PlayerBots V23 Plugin

Below is a Java implementation for a Minecraft server plugin that creates AI-powered bots using the ChatGPT API. This plugin is designed for Bukkit/Spigot servers.

package com.playerbots.v23;

import com.mojang.authlib.GameProfile;
import com.mojang.authlib.properties.Property;
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Location;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.AsyncPlayerChatEvent;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.scheduler.BukkitRunnable;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.*;
import java.util.concurrent.CompletableFuture;
import java.util.logging.Level;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;

public class PlayerBotsV23 extends JavaPlugin implements Listener {

    private String apiKey;
    private List<BotPlayer> activeBots;
    private Map<String, List<ChatMessage>> chatHistory;
    private FileConfiguration config;
    private Random random;
    private String serverVersion;

    public class ChatMessage {
        String role;
        String content;

        public ChatMessage(String role, String content) {
            this.role = role;
            this.content = content;
        }
    }

    public class BotPlayer {
        private String name;
        private UUID uuid;
        private String skinTexture;
        private String skinSignature;
        private Object nmsPlayer;
        private Object playerConnection;
        private Location location;
        private String personality;

        public BotPlayer(String name, String personality) {
            this.name = name;
            this.uuid = UUID.randomUUID();
            this.personality = personality;
            this.location = Bukkit.getWorlds().get(0).getSpawnLocation();
            chatHistory.put(name, new ArrayList<>());
            
            // Add system prompt to define bot personality
            chatHistory.get(name).add(new ChatMessage("system", 
                "You are " + name + ", a Minecraft player with the following personality: " + personality + 
                ". Respond as if you're playing on a Minecraft server. Keep responses brief and casual like a real player would type."
            ));
        }

        public void spawn() {
            try {
                // Get server and player controller classes
                Class<?> minecraftServerClass = getNMSClass("MinecraftServer");
                Object server = getMinecraftServer();
                Class<?> worldServerClass = getNMSClass("WorldServer");
                Object worldServer = getWorldServer(Bukkit.getWorlds().get(0));

                // Create GameProfile with skin
                GameProfile gameProfile = new GameProfile(uuid, name);
                if (skinTexture != null && skinSignature != null) {
                    gameProfile.getProperties().put("textures", new Property("textures", skinTexture, skinSignature));
                }

                // Create EntityPlayer
                Class<?> playerInteractManagerClass = getNMSClass("PlayerInteractManager");
                Constructor<?> playerInteractManagerConstructor = playerInteractManagerClass.getConstructor(worldServerClass);
                Object playerInteractManager = playerInteractManagerConstructor.newInstance(worldServer);

                Class<?> entityPlayerClass = getNMSClass("EntityPlayer");
                Constructor<?> entityPlayerConstructor = entityPlayerClass.getConstructor(
                        minecraftServerClass, worldServerClass, GameProfile.class, playerInteractManagerClass);
                nmsPlayer = entityPlayerConstructor.newInstance(server, worldServer, gameProfile, playerInteractManager);

                // Get PlayerConnection
                Class<?> entityPlayerMP = getNMSClass("EntityPlayer");
                Field playerConnectionField = entityPlayerMP.getField("playerConnection");
                playerConnection = playerConnectionField.get(nmsPlayer);

                // Add the player to the server's player list
                Method addPlayerMethod;
                if (serverVersion.startsWith("v1_8")) {
                    Class<?> playerListClass = getNMSClass("PlayerList");
                    addPlayerMethod = playerListClass.getMethod("a", entityPlayerClass);
                } else {
                    Class<?> playerListClass = getNMSClass("PlayerList");
                    addPlayerMethod = playerListClass.getMethod("a", entityPlayerClass);
                }

                Object playerList = getPlayerList();
                addPlayerMethod.invoke(playerList, nmsPlayer);

                // Spawn the player for all online players
                for (Player player : Bukkit.getOnlinePlayers()) {
                    sendSpawnPacket(player);
                }

                getLogger().info("Spawned bot player: " + name);
            } catch (Exception e) {
                getLogger().log(Level.SEVERE, "Error spawning bot player", e);
            }
        }

        private void sendSpawnPacket(Player player) {
            try {
                // Create and send player info packet
                Class<?> packetPlayOutPlayerInfoClass = getNMSClass("PacketPlayOutPlayerInfo");
                Class<?> enumPlayerInfoActionClass = getNMSClass("PacketPlayOutPlayerInfo$EnumPlayerInfoAction");
                Object addPlayerEnum = enumPlayerInfoActionClass.getField("ADD_PLAYER").get(null);
                
                Constructor<?> packetPlayOutPlayerInfoConstructor;
                Object packetPlayOutPlayerInfo;
                
                if (serverVersion.startsWith("v1_8")) {
                    packetPlayOutPlayerInfoConstructor = packetPlayOutPlayerInfoClass.getConstructor(
                            enumPlayerInfoActionClass, Iterable.class);
                    packetPlayOutPlayerInfo = packetPlayOutPlayerInfoConstructor.newInstance(
                            addPlayerEnum, Collections.singletonList(nmsPlayer));
                } else {
                    packetPlayOutPlayerInfoConstructor = packetPlayOutPlayerInfoClass.getConstructor(
                            enumPlayerInfoActionClass, Iterable.class);
                    packetPlayOutPlayerInfo = packetPlayOutPlayerInfoConstructor.newInstance(
                            addPlayerEnum, Collections.singletonList(nmsPlayer));
                }

                // Send packet to player
                sendPacket(player, packetPlayOutPlayerInfo);
                
                // Create and send named entity spawn packet
                Class<?> packetPlayOutNamedEntitySpawnClass = getNMSClass("PacketPlayOutNamedEntitySpawn");
                Constructor<?> packetPlayOutNamedEntitySpawnConstructor = packetPlayOutNamedEntitySpawnClass.getConstructor(
                        getNMSClass("EntityHuman"));
                Object packetPlayOutNamedEntitySpawn = packetPlayOutNamedEntitySpawnConstructor.newInstance(nmsPlayer);
                
                sendPacket(player, packetPlayOutNamedEntitySpawn);
            } catch (Exception e) {
                getLogger().log(Level.SEVERE, "Error sending spawn packet", e);
            }
        }

        public void despawn() {
            try {
                // Remove the player from the server's player list
                Class<?> packetPlayOutPlayerInfoClass = getNMSClass("PacketPlayOutPlayerInfo");
                Class<?> enumPlayerInfoActionClass = getNMSClass("PacketPlayOutPlayerInfo$EnumPlayerInfoAction");
                Object removePlayerEnum = enumPlayerInfoActionClass.getField("REMOVE_PLAYER").get(null);
                
                Constructor<?> packetPlayOutPlayerInfoConstructor;
                Object packetPlayOutPlayerInfo;
                
                if (serverVersion.startsWith("v1_8")) {
                    packetPlayOutPlayerInfoConstructor = packetPlayOutPlayerInfoClass.getConstructor(
                            enumPlayerInfoActionClass, Iterable.class);
                    packetPlayOutPlayerInfo = packetPlayOutPlayerInfoConstructor.newInstance(
                            removePlayerEnum, Collections.singletonList(nmsPlayer));
                } else {
                    packetPlayOutPlayerInfoConstructor = packetPlayOutPlayerInfoClass.getConstructor(
                            enumPlayerInfoActionClass, Iterable.class);
                    packetPlayOutPlayerInfo = packetPlayOutPlayerInfoConstructor.newInstance(
                            removePlayerEnum, Collections.singletonList(nmsPlayer));
                }

                // Send packet to all players
                for (Player player : Bukkit.getOnlinePlayers()) {
                    sendPacket(player, packetPlayOutPlayerInfo);
                }

                getLogger().info("Despawned bot player: " + name);
            } catch (Exception e) {
                getLogger().log(Level.SEVERE, "Error despawning bot player", e);
            }
        }

        public void sendMessage(String message) {
            try {
                // Create chat packet
                Class<?> packetPlayOutChatClass = getNMSClass("PacketPlayOutChat");
                Class<?> iChatBaseComponentClass = getNMSClass("IChatBaseComponent");
                Class<?> chatSerializerClass;
                
                if (serverVersion.startsWith("v1_8")) {
                    chatSerializerClass = getNMSClass("IChatBaseComponent$ChatSerializer");
                } else {
                    chatSerializerClass = getNMSClass("ChatSerializer");
                }
                
                Method chatSerializerMethod = chatSerializerClass.getMethod("a", String.class);
                Object chatComponent = chatSerializerMethod.invoke(null, "{\"text\":\"" + message + "\"}");
                
                Constructor<?> packetPlayOutChatConstructor;
                Object packetPlayOutChat;
                
                if (serverVersion.contains("1_16") || serverVersion.contains("1_17") || serverVersion.contains("1_18")) {
                    // For newer versions with chat types
                    packetPlayOutChatConstructor = packetPlayOutChatClass.getConstructor(
                            iChatBaseComponentClass, byte.class, UUID.class);
                    packetPlayOutChat = packetPlayOutChatConstructor.newInstance(
                            chatComponent, (byte) 0, uuid);
                } else {
                    // For older versions
                    packetPlayOutChatConstructor = packetPlayOutChatClass.getConstructor(
                            iChatBaseComponentClass, byte.class);
                    packetPlayOutChat = packetPlayOutChatConstructor.newInstance(
                            chatComponent, (byte) 0);
                }
                
                // Send packet to all players
                for (Player player : Bukkit.getOnlinePlayers()) {
                    sendPacket(player, packetPlayOutChat);
                }
                
                // Add to chat history
                chatHistory.get(name).add(new ChatMessage("assistant", message));
            } catch (Exception e) {
                getLogger().log(Level.SEVERE, "Error sending bot message", e);
            }
        }

        public void setSkin(String texture, String signature) {
            this.skinTexture = texture;
            this.skinSignature = signature;
        }

        public String getName() {
            return name;
        }

        public Location getLocation() {
            return location;
        }

        public void setLocation(Location location) {
            this.location = location;
        }

        public void moveRandomly() {
            // Logic for random movement
            // This would involve calculating a random position near the current one
            // and sending movement packets to all players
            double x = location.getX() + (random.nextDouble() * 10 - 5);
            double z = location.getZ() + (random.nextDouble() * 10 - 5);
            
            Location newLoc = new Location(
                location.getWorld(),
                x,
                location.getWorld().getHighestBlockYAt((int)x, (int)z) + 1,
                z,
                random.nextFloat() * 360,
                0
            );
            
            teleport(newLoc);
        }

        public void teleport(Location location) {
            try {
                this.location = location;
                
                // Create teleport packet
                Class<?> packetPlayOutEntityTeleportClass = getNMSClass("PacketPlayOutEntityTeleport");
                
                // Get entity ID
                Method getIdMethod = nmsPlayer.getClass().getMethod("getId");
                int entityId = (int) getIdMethod.invoke(nmsPlayer);
                
                Constructor<?> packetPlayOutEntityTeleportConstructor;
                Object packetPlayOutEntityTeleport;
                
                if (serverVersion.startsWith("v1_8")) {
                    packetPlayOutEntityTeleportConstructor = packetPlayOutEntityTeleportClass.getConstructor(
                            int.class, int.class, int.class, int.class, byte.class, byte.class, boolean.class);
                    packetPlayOutEntityTeleport = packetPlayOutEntityTeleportConstructor.newInstance(
                            entityId,
                            MathHelper.floor(location.getX() * 32.0D),
                            MathHelper.floor(location.getY() * 32.0D),
                            MathHelper.floor(location.getZ() * 32.0D),
                            (byte) ((int) (location.getYaw() * 256.0F / 360.0F)),
                            (byte) ((int) (location.getPitch() * 256.0F / 360.0F)),
                            false
                    );
                } else {
                    packetPlayOutEntityTeleportConstructor = packetPlayOutEntityTeleportClass.getConstructor(
                            getNMSClass("Entity"));
                    
                    // Update entity position
                    Method setPositionMethod = nmsPlayer.getClass().getMethod("setPosition", double.class, double.class, double.class);
                    setPositionMethod.invoke(nmsPlayer, location.getX(), location.getY(), location.getZ());
                    
                    // Update entity rotation
                    Field yawField = nmsPlayer.getClass().getField("yaw");
                    Field pitchField = nmsPlayer.getClass().getField("pitch");
                    yawField.setFloat(nmsPlayer, location.getYaw());
                    pitchField.setFloat(nmsPlayer, location.getPitch());
                    
                    packetPlayOutEntityTeleport = packetPlayOutEntityTeleportConstructor.newInstance(nmsPlayer);
                }
                
                // Send packet to all players
                for (Player player : Bukkit.getOnlinePlayers()) {
                    sendPacket(player, packetPlayOutEntityTeleport);
                }
            } catch (Exception e) {
                getLogger().log(Level.SEVERE, "Error teleporting bot player", e);
            }
        }
        
        public void processChat(Player player, String message) {
            // Add to chat history
            chatHistory.get(name).add(new ChatMessage("user", player.getName() + ": " + message));
            
            // Process with ChatGPT and respond
            CompletableFuture.runAsync(() -> {
                String response = getChatGPTResponse(name);
                if (response != null) {
                    // Small delay to make it seem more natural
                    new BukkitRunnable() {
                        @Override
                        public void run() {
                            sendMessage(response);
                        }
                    }.runTaskLater(PlayerBotsV23.this, 10 + random.nextInt(20));
                }
            });
        }
    }

    @Override
    public void onEnable() {
        // Save default config
        saveDefaultConfig();
        config = getConfig();
        
        // Initialize variables
        apiKey = config.getString("api-key", "");
        activeBots = new ArrayList<>();
        chatHistory = new HashMap<>();
        random = new Random();
        serverVersion = getServer().getClass().getPackage().getName().split("\\.")[3];
        
        if (apiKey.isEmpty()) {
            getLogger().warning("No API key set! Please set the 'api-key' in config.yml");
        }
        
        // Register events
        getServer().getPluginManager().registerEvents(this, this);
        
        // Schedule random movements and actions for bots
        getServer().getScheduler().scheduleSyncRepeatingTask(this, () -> {
            for (BotPlayer bot : activeBots) {
                if (random.nextDouble() < 0.2) { // 20% chance to move
                    bot.moveRandomly();
                }
                
                if (random.nextDouble() < 0.05 && !Bukkit.getOnlinePlayers().isEmpty()) { // 5% chance to say something random
                    String randomMessage = getChatGPTRandomMessage(bot.getName());
                    if (randomMessage != null) {
                        bot.sendMessage(randomMessage);
                    }
                }
            }
        }, 100L, 200L); // Every 10 seconds
        
        getLogger().info("PlayerBots V23 has been enabled!");
    }

    @Override
    public void onDisable() {
        // Despawn all bots
        for (BotPlayer bot : activeBots) {
            bot.despawn();
        }
        activeBots.clear();
        
        getLogger().info("PlayerBots V23 has been disabled!");
    }

    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        if (cmd.getName().equalsIgnoreCase("bot")) {
            if (!sender.hasPermission("playerbots.admin")) {
                sender.sendMessage(ChatColor.RED + "You don't have permission to use this command.");
                return true;
            }
            
            if (args.length < 1) {
                sender.sendMessage(ChatColor.RED + "Usage: /bot <create|remove|list> [name] [personality]");
                return true;
            }
            
            String action = args[0].toLowerCase();
            
            switch (action) {
                case "create":
                    if (args.length < 3) {
                        sender.sendMessage(ChatColor.RED + "Usage: /bot create <name> <personality>");
                        return true;
                    }
                    
                    String name = args[1];
                    StringBuilder personalityBuilder = new StringBuilder();
                    for (int i = 2; i < args.length; i++) {
                        personalityBuilder.append(args[i]).append(" ");
                    }
                    String personality = personalityBuilder.toString().trim();
                    
                    // Check if bot with this name already exists
                    for (BotPlayer bot : activeBots) {
                        if (bot.getName().equalsIgnoreCase(name)) {
                            sender.sendMessage(ChatColor.RED + "A bot with this name already exists!");
                            return true;
                        }
                    }
                    
                    // Create and spawn the bot
                    BotPlayer bot = new BotPlayer(name, personality);
                    
                    // Set skin if configured
                    if (config.contains("default-skin.texture") && config.contains("default-skin.signature")) {
                        bot.setSkin(
                            config.getString("default-skin.texture"),
                            config.getString("default-skin.signature")
                        );
                    }
                    
                    bot.spawn();
                    activeBots.add(bot);
                    
                    sender.sendMessage(ChatColor.GREEN + "Created bot player: " + name);
                    return true;
                    
                case "remove":
                    if (args.length < 2) {
                        sender.sendMessage(ChatColor.RED + "Usage: /bot remove <name>");
                        return true;
                    }
                    
                    String botName = args[1];
                    BotPlayer targetBot = null;
                    
                    for (BotPlayer b : activeBots) {
                        if (b.getName().equalsIgnoreCase(botName)) {
                            targetBot = b;
                            break;
                        }
                    }
                    
                    if (targetBot == null) {
                        sender.sendMessage(ChatColor.RED + "No bot found with name: " + botName);
                        return true;
                    }
                    
                    targetBot.despawn();
                    activeBots.remove(targetBot);
                    chatHistory.remove(targetBot.getName());
                    
                    sender.sendMessage(ChatColor.GREEN + "Removed bot player: " + botName);
                    return true;
                    
                case "list":
                    if (activeBots.isEmpty()) {
                        sender.sendMessage(ChatColor.YELLOW + "There are no active bots.");
                    } else {
                        sender.sendMessage(ChatColor.GREEN + "Active bots:");
                        for (BotPlayer b : activeBots) {
                            sender.sendMessage(ChatColor.YELLOW + "- " + b.getName());
                        }
                    }
                    return true;
                    
                default:
                    sender.sendMessage(ChatColor.RED + "Unknown action. Use create, remove, or list.");
                    return true;
            }
        }
        
        return false;
    }

    @EventHandler
    public void onPlayerChat(AsyncPlayerChatEvent event) {
        Player player = event.getPlayer();
        String message = event.getMessage();
        
        for (BotPlayer bot : activeBots) {
            // Check if the message contains the bot's name or is directed at the bot
            if (message.contains(bot.getName()) || 
                    (message.startsWith("@") && message.substring(1).startsWith(bot.getName()))) {
                bot.processChat(player, message);
                break;
            }
        }
    }

    private String getChatGPTResponse(String botName) {
        try {
            if (apiKey.isEmpty()) {
                getLogger().warning("Cannot get ChatGPT response: API key not set");
                return "I can't respond right now.";
            }
            
            List<ChatMessage> history = chatHistory.get(botName);
            if (history == null || history.isEmpty()) {
                getLogger().warning("No chat history found for bot: " + botName);
                return "I can't remember our conversation.";
            }
            
            // Prepare the request
            URL url = new URL("https://api.openai.com/v1/chat/completions");
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("POST");
            connection.setRequestProperty("Content-Type", "application/json");
            connection.setRequestProperty("Authorization", "Bearer " + apiKey);
            connection.setDoOutput(true);
            
            // Build the request body
            StringBuilder jsonBody = new StringBuilder();
            jsonBody.append("{");
            jsonBody.append("\"model\": \"gpt-3.5-turbo\",");
            jsonBody.append("\"messages\": [");
            
            for (int i = 0; i < history.size(); i++) {
                ChatMessage msg = history.get(i);
                jsonBody.append("{");
                jsonBody.append("\"role\": \"").append(msg.role).append("\",");
                jsonBody.append("\"content\": \"").append(escapeJson(msg.content)).append("\"");
                jsonBody.append("}");
                
                if (i < history.size() - 1) {
                    jsonBody.append(",");
                }
            }
            
            jsonBody.append("],");
            jsonBody.append("\"max_tokens\": 100,");
            jsonBody.append("\"temperature\": 0.7");
            jsonBody.append("}");
            
            // Send the request
            try (OutputStream os = connection.getOutputStream()) {
                byte[] input = jsonBody.toString().getBytes("utf-8");
                os.write(input, 0, input.length);
            }
            
            // Get the response
            StringBuilder response = new StringBuilder();
            try (BufferedReader br = new BufferedReader(
                    new InputStreamReader(connection.getInputStream(), "utf-8"))) {
                String responseLine;
                while ((responseLine = br.readLine()) != null) {
                    response.append(responseLine.trim());
                }
            }
            
            // Parse the response
            String responseJson = response.toString();
            Pattern pattern = Pattern.compile("\"content\":\"(.*?)\"");
            Matcher matcher = pattern.matcher(responseJson);
            
            if (matcher.find()) {
                String content = matcher.group(1);
                // Unescape JSON escaped characters
                content = content.replace("\\\"", "\"")
                                .replace("\\n", " ")
                                .replace("\\r", "")
                                .replace("\\t", " ");
                return content;
            } else {
                getLogger().warning("Failed to parse ChatGPT response: " + responseJson);
                return "I'm not sure what to say.";
            }
        } catch (Exception e) {
            getLogger().log(Level.SEVERE, "Error getting ChatGPT response", e);
            return "Sorry, I'm having trouble thinking right now.";
        }
    }

    private String getChatGPTRandomMessage(String botName) {
        try {
            if (apiKey.isEmpty()) {
                return null;
            }
            
            List<ChatMessage> history = chatHistory.get(botName);
            if (history == null || history.isEmpty()) {
                return null;
            }
            
            // Create a prompt for a random message
            List<ChatMessage> promptMessages = new ArrayList<>();
            promptMessages.add(new ChatMessage("system", 
                "You are " + botName + ", a Minecraft player. Generate a short, casual message that you might say unprompted " +
                "while playing on a Minecraft server. This could be about what you're doing, a question, or just a random thought. " +
                "Keep it very brief (15 words or less) and natural, as if typed quickly in a game chat."
            ));
            
            // Prepare the request
            URL url = new URL("https://api.openai.com/v1/chat/completions");
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("POST");
            connection.setRequestProperty("Content-Type", "application/json");
            connection.setRequestProperty("Authorization", "Bearer " + apiKey);
            connection.setDoOutput(true);
            
            // Build the request body
            StringBuilder jsonBody = new StringBuilder();
            jsonBody.append("{");
            jsonBody.append("\"model\": \"gpt-3.5-turbo\",");
            jsonBody.append("\"messages\": [");
            
            for (int i = 0; i < promptMessages.size(); i++) {
                ChatMessage msg = promptMessages.get(i);
                jsonBody.append("{");
                jsonBody.append("\"role\": \"").append(msg.role).append("\",");
                jsonBody.append("\"content\": \"").append(escapeJson(msg.content)).append("\"");
                jsonBody.append("}");
                
                if (i < promptMessages.size() - 1) {
                    jsonBody.append(",");
                }
            }
            
            jsonBody.append("],");
            jsonBody.append("\"max_tokens\": 50,");
            jsonBody.append("\"temperature\": 0.9");
            jsonBody.append("}");
            
            // Send the request
            try (OutputStream os = connection.getOutputStream()) {
                byte[] input = jsonBody.toString().getBytes("utf-8");
                os.write(input, 0, input.length);
            }
            
            // Get the response
            StringBuilder response = new StringBuilder();
            try (BufferedReader br = new BufferedReader(
                    new InputStreamReader(connection.getInputStream(), "utf-8"))) {
                String responseLine;
                while ((responseLine = br.readLine()) != null) {
                    response.append(responseLine.trim());
                }
            }
            
            // Parse the response
            String responseJson = response.toString();
            Pattern pattern = Pattern.compile("\"content\":\"(.*?)\"");
            Matcher matcher = pattern.matcher(responseJson);
            
            if (matcher.find()) {
                String content = matcher.group(1);
                // Unescape JSON escaped characters
                content = content.replace("\\\"", "\"")
                                .replace("\\n", " ")
                                .replace("\\r", "")
                                .replace("\\t", " ");
                
                // Add to chat history
                chatHistory.get(botName).add(new ChatMessage("assistant", content));
                
                return content;
            } else {
                return null;
            }
        } catch (Exception e) {
            return null;
        }
    }

    private String escapeJson(String text) {
        return text.replace("\\", "\\\\")
                  .replace("\"", "\\\"")
                  .replace("\n", "\\n")
                  .replace("\r", "\\r")
                  .replace("\t", "\\t");
    }

    // NMS utility methods
    private Class<?> getNMSClass(String name) {
        try {
            return Class.forName("net.minecraft.server." + serverVersion + "." + name);
        } catch (ClassNotFoundException e) {
            try {
                // Try with newer package structure (1.17+)
                if (name.startsWith("Packet")) {
                    return Class.forName("net.minecraft.network.protocol.game." + name);
                } else {
                    return Class.forName("net.minecraft.server.level." + name);
                }
            } catch (ClassNotFoundException ex) {
                getLogger().log(Level.SEVERE, "Could not find NMS class: " + name, ex);
                return null;
            }
        }
    }

    private Object getMinecraftServer() {
        try {
            return Bukkit.getServer().getClass().getMethod("getServer").invoke(Bukkit.getServer());
        } catch (Exception e) {
            getLogger().log(Level.SEVERE, "Could not get MinecraftServer instance", e);
            return null;
        }
    }

    private Object getWorldServer(org.bukkit.World world) {
        try {
            return world.getClass().getMethod("getHandle").invoke(world);
        } catch (Exception e) {
            getLogger().log(Level.SEVERE, "Could not get WorldServer instance", e);
            return null;
        }
    }

    private Object getPlayerList() {
        try {
            Object minecraftServer = getMinecraftServer();
            Method getPlayerListMethod = minecraftServer.getClass().getMethod("getPlayerList");
            return getPlayerListMethod.invoke(minecraftServer);
        } catch (Exception e) {
            getLogger().log(Level.SEVERE, "Could not get PlayerList instance", e);
            return null;
        }
    }

    private void sendPacket(Player player, Object packet) {
        try {
            Object playerConnection = getPlayerConnection(player);
            Method sendPacketMethod = playerConnection.getClass().getMethod("sendPacket", getNMSClass("Packet"));
            sendPacketMethod.invoke(playerConnection, packet);
        } catch (Exception e) {
            getLogger().log(Level.SEVERE, "Could not send packet", e);
        }
    }

    private Object getPlayerConnection(Player player) {
        try {
            Object nmsPlayer = player.getClass().getMethod("getHandle").invoke(player);
            return nmsPlayer.getClass().getField("playerConnection").get(nmsPlayer);
        } catch (Exception e) {
            getLogger().log(Level.SEVERE, "Could not get PlayerConnection", e);
            return null;
        }
    }
    
    // Helper utility methods
    private static class MathHelper {
        public static int floor(double value) {
            int i = (int)value;
            return value < (double)i ? i - 1 : i;
        }
    }
}

Now, let's create the config.yml file:

# PlayerBots V23 Configuration

# OpenAI API Key - Required for ChatGPT functionality
api-key: ""

# Default skin for bots (optional)
default-skin:
  texture: ""
  signature: ""

# Bot settings
settings:
  move-interval: 200
  chat-interval: 600
  max-message-history: 50

# Personalities for bots to choose from
personalities:
  - "friendly and helpful player who enjoys building"
  - "competitive player who likes PvP"
  - "curious player who asks lots of questions"
  - "experienced player who gives tips and advice"
  - "explorer who loves to venture into new areas"
  - "miner who is obsessed with finding diamonds"
  - "farmer who enjoys agriculture and animal breeding"
  - "trader who likes to exchange items with others"

And finally, the plugin.yml file:

name: PlayerBotsV23
version: 1.0
main: com.playerbots.v23.PlayerBotsV23
api-version: 1.13
description: AI-powered bot players using ChatGPT
author: AI Developer
commands:
  bot:
    description: Manage AI bot players
    usage: /bot <create|remove|list> [name] [personality]
    permission: playerbots.admin
permissions:
  playerbots.admin:
    description: Allows managing bot players
    default: op

Installation Instructions

Compile the plugin using a Java IDE or build tool like Maven.
Place the compiled JAR file in your server's plugins folder.
Start or restart your server.
Edit the config.yml file in the plugins/PlayerBotsV23 directory to add your OpenAI API key.
Restart the server again or use /reload to apply the configuration changes.

Usage Instructions

/bot create <name> <personality> - Creates and spawns a new bot with the given name and personality
/bot remove <name> - Removes a bot from the server
/bot list - Lists all active bots on the server

Notes

This implementation requires an OpenAI API key to function.
The plugin may need adjustments based on the specific version of Minecraft server you're running.
The reflection code is complex due to NMS classes changing between Minecraft versions.
For production use, consider implementing rate limiting to avoid excessive API usage.

This should provide a solid foundation for your PlayerBots V23 plugin. You can extend it with additional features like economy integration, more complex bot behaviors, or improved movement patterns.

Player joins

PlayerBots V23 Plugin

Installation Instructions

Usage Instructions

Notes