refactor: Convert project from JavaScript to TypeScript

- Converted all .js files to .ts
- Added TypeScript configuration (tsconfig.json)
- Added ESLint and Prettier configuration
- Updated package.json dependencies
- Modified Docker and application configurations

.env.example

@@ -0,0 +1,17 @@
+# Discord Bot Token
+DISCORD_TOKEN=your_token_here
+
+# Discord Application Client ID (for command deployment)
+CLIENT_ID=your_client_id_here
+
+# Discord Guild ID (optional, for deploying commands to a specific test server)
+# GUILD_ID=your_guild_id_here
+
+# Lavalink Configuration
+# Use 'lavalink' if running via docker-compose, '127.0.0.1' or 'localhost' if running Lavalink directly
+LAVALINK_HOST=lavalink
+LAVALINK_PORT=2333
+LAVALINK_PASSWORD=your_password_here
+
+# Logging Level (e.g., debug, info, warn, error)
+LOG_LEVEL=info

.eslintrc.json

@@ -0,0 +1,27 @@
+{
+  "root": true,
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": "latest",
+    "sourceType": "module",
+    "project": "./tsconfig.json" // Point ESLint to your TS config
+  },
+  "plugins": [
+    "@typescript-eslint",
+    "prettier" // Integrates Prettier rules into ESLint
+  ],
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended", // Recommended TS rules
+    "plugin:@typescript-eslint/recommended-requiring-type-checking", // Rules requiring type info
+    "plugin:prettier/recommended" // Enables eslint-plugin-prettier and eslint-config-prettier
+  ],
+  "rules": {
+    // Add or override specific rules here if needed
+    "prettier/prettier": "warn", // Show Prettier issues as warnings
+    "@typescript-eslint/no-unused-vars": ["warn", { "argsIgnorePattern": "^_" }], // Warn about unused vars, allow underscores
+    "@typescript-eslint/explicit-module-boundary-types": "off", // Allow inferred return types for now
+    "@typescript-eslint/no-explicit-any": "warn" // Warn about using 'any'
+  },
+  "ignorePatterns": ["node_modules/", "dist/", "data/", "*.db", "*.db-journal", "*.db-wal"]
+}

.gitignore

@@ -1,22 +1,23 @@
-# ---> Rust
-# Generated by Cargo
-# will have compiled files and executables
-debug/
-target/
+# Node modules
+node_modules/
+dist/
 
-# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
-# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
-Cargo.lock
+# dotenv environment variables
+.env
 
-# These are backup files generated by rustfmt
-**/*.rs.bk
+# VSCode settings
+.vscode/
 
-# MSVC Windows builds of rustc generate these, which store debugging information
-*.pdb
+# Mac system files
+.DS_Store
 
-# RustRover
-#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
-#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
-#  and can be added to the global gitignore or merged into this file.  For a more nuclear
-#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-#.idea/
+# Lockfiles
+pnpm-lock.yaml
+
+# Logs
+npm-debug.log*
+logs/
+*.log
+
+# Data directory
+data/

.prettierignore

@@ -0,0 +1,21 @@
+# Ignore artifacts:
+node_modules
+dist
+coverage
+data
+*.db
+*.db-journal
+*.db-wal
+
+# Ignore configuration files managed by other tools:
+package-lock.json
+pnpm-lock.yaml
+yarn.lock
+
+# Ignore logs:
+logs
+*.log
+
+# Ignore environment files:
+.env*
+!.env.example

.prettierrc.json

@@ -0,0 +1,9 @@
+{
+  "semi": true,
+  "trailingComma": "es5",
+  "singleQuote": false,
+  "printWidth": 80,
+  "tabWidth": 2,
+  "useTabs": false,
+  "endOfLine": "lf"
+}

Dockerfile

@@ -0,0 +1,45 @@
+# ---- Build Stage ----
+FROM node:23-alpine AS builder
+
+WORKDIR /app
+
+# Install pnpm and necessary build tools (if native modules are used)
+RUN apk add --no-cache python3 make g++ pnpm
+
+# Copy package manifests
+COPY package.json pnpm-lock.yaml ./
+
+# Install ALL dependencies (including devDependencies needed for build)
+RUN pnpm install --frozen-lockfile
+
+# Copy the rest of the source code
+COPY . .
+
+# Compile TypeScript
+RUN pnpm run build
+
+# Prune devDependencies after build (optional but good practice)
+RUN pnpm prune --prod
+
+
+# ---- Production Stage ----
+FROM node:23-alpine
+
+WORKDIR /app
+
+ENV NODE_ENV=production
+
+# Copy necessary files from the builder stage
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/dist ./dist
+COPY --from=builder /app/package.json ./package.json
+# Copy other runtime necessities (adjust if needed)
+# COPY .env.example ./
+# COPY application.yml ./
+# COPY plugins ./plugins
+
+# Expose port if needed (though likely not for a Discord bot)
+# EXPOSE 3000
+
+# Run the compiled JavaScript application
+CMD ["node", "dist/index.js"]

README.md

@@ -1,3 +1,69 @@
 # discord-music-bot
 
-Discord bot made in Rust using serenity and lavalink-rs
+Discord music bot template written in NodeJS using `discord.js` and `erela.js`, with Lavalink support.
+
+## Features
+
+- Slash commands: `/ping`, `/join`, `/play`, `/leave`  
+- Lavalink integration for audio playback  
+- Modular command handler structure  
+
+## Prerequisites
+
+- Node.js (>=14)  
+- pnpm or npm  
+- A Discord application with bot token  
+- LavaLink server for audio streaming  
+
+## Setup
+
+1. Copy `.env.example` to `.env` and fill in your credentials:
+   ```env
+   DISCORD_TOKEN=your_discord_bot_token
+   CLIENT_ID=your_discord_application_id
+   LAVALINK_HOST=127.0.0.1
+   LAVALINK_PORT=2333
+   LAVALINK_PASSWORD=your_lavalink_password
+   ```
+2. Install dependencies:
+   ```sh
+   pnpm install
+   ```
+3. Run tests:
+   ```sh
+   pnpm test
+   ```
+4. Register slash commands:
+   ```sh
+   pnpm start # or node deploy-commands.js
+   ```
+5. Start the bot:
+   ```sh
+   pnpm start
+   ```
+
+## Docker
+
+A `Dockerfile` and `docker-compose.yml` are provided for containerized deployment.
+
+- Build and run with Docker Compose:
+  ```sh
+  docker-compose up --build
+  ```
+- Environment variables are loaded from `.env`.  
+- Lavalink service is configured in `docker-compose.yml` alongside the bot.
+
+## Project Structure
+
+- `src/index.js` — Entry point  
+- `src/commands/` — Slash command modules  
+- `src/events/` — Discord event handlers  
+- `src/structures/` — Erela.js (Lavalink) event wiring  
+- `src/utils/logger.js` — Logging setup  
+- `deploy-commands.js` — Slash command registration script  
+- `Dockerfile` — Bot container image  
+- `docker-compose.yml` — Multi-service setup (bot + Lavalink)  
+
+## License
+
+MIT

application.yml

@@ -0,0 +1,116 @@
+server: # REST and WS server
+  port: 2333
+  address: 0.0.0.0
+  http2:
+    enabled: false # Whether to enable HTTP/2 support
+# Root level plugin configuration block
+plugins:
+  youtube:
+    enabled: true # Whether this source can be used.
+    allowSearch: true # Whether "ytsearch:" and "ytmsearch:" can be used.
+    allowDirectVideoIds: true # Whether just video IDs can match. If false, only complete URLs will be loaded.
+    allowDirectPlaylistIds: true # Whether just playlist IDs can match. If false, only complete URLs will be loaded.
+    # The clients to use for track loading. See below for a list of valid clients.
+    # Clients are queried in the order they are given (so the first client is queried first and so on...)
+    clients:
+      - WEB
+      - WEBEMBEDDED
+      - MUSIC
+    oauth:
+      enabled: true
+      # If you obtain a refresh token after the initial OAuth flow, you can add it here
+      # refreshToken: "paste your refresh token here if applicable"
+      # Leave skipInitialization commented for first-time setup
+      # skipInitialization: true
+lavalink:
+  plugins:
+#    - dependency: "com.github.example:example-plugin:1.0.0" # required, the coordinates of your plugin
+#      repository: "https://maven.example.com/releases" # optional, defaults to the Lavalink releases repository by default
+#      snapshot: false # optional, defaults to false, used to tell Lavalink to use the snapshot repository instead of the release repository
+  pluginsDir: "/plugins" # Set directory for manually loaded plugins
+#  defaultPluginRepository: "https://maven.lavalink.dev/releases" # optional, defaults to the Lavalink release repository
+#  defaultPluginSnapshotRepository: "https://maven.lavalink.dev/snapshots" # optional, defaults to the Lavalink snapshot repository
+  server:
+    password: "${LAVALINK_PASSWORD}" # Use environment variable
+    sources:
+      # The default Youtube source is now deprecated and won't receive further updates. Please use https://github.com/lavalink-devs/youtube-source#plugin instead.
+      youtube: false
+      bandcamp: false
+      soundcloud: false
+      twitch: false
+      vimeo: false
+      nico: false
+      http: false # warning: keeping HTTP enabled without a proxy configured could expose your server's IP address.
+      local: false
+    filters: # All filters are enabled by default
+      volume: true
+      equalizer: true
+      karaoke: true
+      timescale: true
+      tremolo: true
+      vibrato: true
+      distortion: true
+      rotation: true
+      channelMix: true
+      lowPass: true
+    nonAllocatingFrameBuffer: false # Setting to true reduces the number of allocations made by each player at the expense of frame rebuilding (e.g. non-instantaneous volume changes)
+    bufferDurationMs: 400 # The duration of the NAS buffer. Higher values fare better against longer GC pauses. Duration <= 0 to disable JDA-NAS. Minimum of 40ms, lower values may introduce pauses.
+    frameBufferDurationMs: 5000 # How many milliseconds of audio to keep buffered
+    opusEncodingQuality: 10 # Opus encoder quality. Valid values range from 0 to 10, where 10 is best quality but is the most expensive on the CPU.
+    resamplingQuality: LOW # Quality of resampling operations. Valid values are LOW, MEDIUM and HIGH, where HIGH uses the most CPU.
+    trackStuckThresholdMs: 10000 # The threshold for how long a track can be stuck. A track is stuck if does not return any audio data.
+    useSeekGhosting: true # Seek ghosting is the effect where whilst a seek is in progress, the audio buffer is read from until empty, or until seek is ready.
+    youtubePlaylistLoadLimit: 6 # Number of pages at 100 each
+    playerUpdateInterval: 5 # How frequently to send player updates to clients, in seconds
+    youtubeSearchEnabled: true
+    soundcloudSearchEnabled: true
+    gc-warnings: true
+    #ratelimit:
+      #ipBlocks: ["1.0.0.0/8", "..."] # list of ip blocks
+      #excludedIps: ["...", "..."] # ips which should be explicit excluded from usage by lavalink
+      #strategy: "RotateOnBan" # RotateOnBan | LoadBalance | NanoSwitch | RotatingNanoSwitch
+      #searchTriggersFail: true # Whether a search 429 should trigger marking the ip as failing
+      #retryLimit: -1 # -1 = use default lavaplayer value | 0 = infinity | >0 = retry will happen this numbers times
+    #youtubeConfig: # Required for avoiding all age restrictions by YouTube, some restricted videos still can be played without.
+      #email: "" # Email of Google account
+      #password: "" # Password of Google account
+    #httpConfig: # Useful for blocking bad-actors from ip-grabbing your music node and attacking it, this way only the http proxy will be attacked
+      #proxyHost: "localhost" # Hostname of the proxy, (ip or domain)
+      #proxyPort: 3128 # Proxy port, 3128 is the default for squidProxy
+      #proxyUser: "" # Optional user for basic authentication fields, leave blank if you don't use basic auth
+      #proxyPassword: "" # Password for basic authentication
+
+metrics:
+  prometheus:
+    enabled: false
+    endpoint: /metrics
+
+sentry:
+  dsn: ""
+  environment: ""
+#  tags:
+#    some_key: some_value
+#    another_key: another_value
+
+logging:
+  file:
+    path: ./logs/
+
+  level:
+    root: INFO
+    lavalink: INFO
+    dev.lavalink.youtube: INFO # General YouTube plugin logging
+    dev.lavalink.youtube.http.YoutubeOauth2Handler: INFO # Specific OAuth flow logging
+
+  request:
+    enabled: true
+    includeClientInfo: true
+    includeHeaders: false
+    includeQueryString: true
+    includePayload: true
+    maxPayloadLength: 10000
+
+  logback:
+    rollingpolicy:
+      max-file-size: 1GB
+      max-history: 30

deploy-commands.ts

@@ -0,0 +1,103 @@
+import { REST, Routes, APIApplicationCommand } from 'discord.js';
+import fs from 'node:fs';
+import path from 'node:path';
+import logger from './src/utils/logger'; // Use default import now
+import dotenv from 'dotenv';
+
+// --- Setup ---
+dotenv.config(); // Load .env variables
+
+// Log presence of required env vars (optional, but helpful for debugging)
+// logger.info(`CLIENT_ID: ${process.env.CLIENT_ID ? 'Present' : 'MISSING!'}`);
+// logger.info(`DISCORD_TOKEN: ${process.env.DISCORD_TOKEN ? 'Present' : 'MISSING!'}`);
+
+// --- Configuration ---
+const clientId = process.env.CLIENT_ID;
+const token = process.env.DISCORD_TOKEN;
+
+if (!clientId || !token) {
+    logger.error('Missing CLIENT_ID or DISCORD_TOKEN in .env file for command deployment!');
+    process.exit(1);
+}
+
+const commands: Omit<APIApplicationCommand, 'id' | 'application_id' | 'version'>[] = []; // Type the commands array more accurately
+// Grab all the command files from the commands directory
+const commandsPath = path.join(__dirname, 'src', 'commands');
+// Read .ts files now
+const commandFiles = fs.readdirSync(commandsPath).filter((file: string) => file.endsWith('.ts')); // Add string type
+
+// Grab the SlashCommandBuilder#toJSON() output of each command's data for deployment
+logger.info(`Started loading ${commandFiles.length} application (/) commands for deployment.`);
+
+const loadCommandsForDeployment = async () => {
+    for (const file of commandFiles) {
+        const filePath = path.join(commandsPath, file);
+        try {
+            // Use dynamic import
+            const commandModule = await import(filePath);
+            // Assuming commands export default or have a 'default' property
+            const command = commandModule.default || commandModule;
+
+            if (command && typeof command === 'object' && 'data' in command && typeof command.data.toJSON === 'function') {
+                // We push the JSON representation which matches the API structure
+                commands.push(command.data.toJSON());
+                logger.info(`Loaded command for deployment: ${command.data.name}`);
+            } else {
+                logger.warn(`[WARNING] The command at ${filePath} is missing a required "data" property with a "toJSON" method.`);
+            }
+        } catch (error: unknown) { // Type error as unknown
+            const errorMessage = error instanceof Error ? error.message : String(error);
+            logger.error(`Error loading command at ${filePath} for deployment: ${errorMessage}`, error);
+        }
+    }
+};
+
+// Construct and prepare an instance of the REST module
+const rest = new REST({ version: '10' }).setToken(token);
+
+// Define the deployment function
+const deployCommands = async () => {
+    try {
+        await loadCommandsForDeployment(); // Wait for commands to be loaded
+
+        if (commands.length === 0) {
+            logger.warn('No commands loaded for deployment. Exiting.');
+            return;
+        }
+
+        logger.info(`Started refreshing ${commands.length} application (/) commands.`);
+
+        // The put method is used to fully refresh all commands
+        const guildId = process.env.GUILD_ID;
+        let data: any; // Type appropriately if possible, depends on discord.js version
+
+        if (guildId) {
+            // Deploying to a specific guild (faster for testing)
+            logger.info(`Deploying commands to guild: ${guildId}`);
+            data = await rest.put(
+                Routes.applicationGuildCommands(clientId, guildId),
+                { body: commands },
+            );
+            logger.info(`Successfully reloaded ${data.length} application (/) commands in guild ${guildId}.`);
+        } else {
+            // Deploying globally (can take up to an hour)
+            logger.info('Deploying commands globally...');
+            data = await rest.put(
+                Routes.applicationCommands(clientId),
+                { body: commands },
+            );
+            logger.info(`Successfully reloaded ${data.length} global application (/) commands.`);
+        }
+
+    } catch (error: unknown) { // Type error as unknown
+        const errorMessage = error instanceof Error ? error.message : String(error);
+        logger.error(`Failed during command deployment: ${errorMessage}`, error);
+    }
+};
+
+// Execute the deployment
+deployCommands();
+
+// Note: The old wipe logic is removed as PUT overwrites existing commands.
+// If you specifically need to wipe commands first for some reason,
+// you can add separate PUT requests with an empty body before deploying.

docker-compose.yml

@@ -0,0 +1,46 @@
+services:
+  lavalink:
+    image: fredboat/lavalink:latest
+    container_name: lavalink
+    restart: unless-stopped
+    networks:
+      - bot-network
+    ports:
+      - "2333:2333"
+    environment:
+      - LAVALINK_SERVER_PASSWORD=${LAVALINK_PASSWORD}
+      # Removed LAVALINK_PLUGIN_URLS environment variable
+    volumes:
+      - ./application.yml:/opt/Lavalink/application.yml:ro,Z
+      # Mount local plugins directory into the container with SELinux label
+      - ./plugins:/plugins:ro,Z 
+    # Add healthcheck to verify Lavalink is ready
+    healthcheck:
+      # Use CMD-SHELL to allow environment variable expansion for the password
+      test: ["CMD-SHELL", "curl -H \"Authorization: $$LAVALINK_SERVER_PASSWORD\" -f http://localhost:2333/version || exit 1"]
+      interval: 10s # Increased interval slightly
+      timeout: 5s
+      retries: 5
+      start_period: 15s # Give Lavalink time to start up initially
+    # Removed command override, will use default image entrypoint
+
+  bot:
+    build: .
+    container_name: discord-music-bot
+    restart: unless-stopped
+    networks:
+      - bot-network
+    env_file:
+      - .env
+    environment:
+      LAVALINK_HOST: lavalink
+      LAVALINK_PORT: 2333
+      LAVALINK_PASSWORD: ${LAVALINK_PASSWORD}
+    # Update depends_on to wait for healthcheck
+    depends_on:
+      lavalink:
+        condition: service_healthy
+
+networks:
+  bot-network:
+    driver: bridge

package.json

@@ -0,0 +1,38 @@
+{
+  "name": "discord-music-bot",
+  "version": "1.0.0",
+  "description": "",
+  "main": "dist/index.js",
+  "scripts": {
+    "build": "tsc",
+    "start": "node dist/index.js",
+    "dev": "ts-node-dev --respawn --transpile-only src/index.ts",
+    "lint": "eslint src/**/*.ts tests/**/*.ts deploy-commands.ts",
+    "format": "prettier --write src/**/*.ts tests/**/*.ts deploy-commands.ts",
+    "test": "jest"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "discord.js": "^14.18.0",
+    "dotenv": "^16.5.0",
+    "shoukaku": "^4.1.1",
+    "winston": "^3.17.0"
+  },
+  "devDependencies": {
+    "@types/jest": "^29.5.14",
+    "@types/js-yaml": "^4.0.9",
+    "@types/node": "^22.14.1",
+    "@typescript-eslint/eslint-plugin": "^8.31.0",
+    "@typescript-eslint/parser": "^8.31.0",
+    "eslint": "^9.25.1",
+    "eslint-config-prettier": "^10.1.2",
+    "eslint-plugin-prettier": "^5.2.6",
+    "jest": "^29.7.0",
+    "js-yaml": "^4.1.0",
+    "prettier": "^3.5.3",
+    "ts-node-dev": "^2.0.0",
+    "typescript": "^5.8.3"
+  }
+}

src/commands/join.ts

@@ -0,0 +1,122 @@
+import {
+    SlashCommandBuilder,
+    PermissionFlagsBits,
+    ChannelType,
+    ChatInputCommandInteraction, // Import the specific interaction type
+    GuildMember, // Import GuildMember type
+    VoiceBasedChannel // Import VoiceBasedChannel type
+} from 'discord.js';
+import logger from '../utils/logger'; // Use default import
+import { BotClient } from '../index'; // Import the BotClient interface
+import { Player } from 'shoukaku'; // Import the Player type explicitly
+
+export default { // Use export default for ES Modules
+    data: new SlashCommandBuilder()
+        .setName('join')
+        .setDescription('Joins your current voice channel'),
+    async execute(interaction: ChatInputCommandInteraction, client: BotClient) { // Add types
+        // Ensure command is run in a guild
+        if (!interaction.guildId || !interaction.guild || !interaction.channelId) {
+            // Reply might fail if interaction is already replied/deferred, use editReply if needed
+            return interaction.reply({ content: 'This command can only be used in a server.', ephemeral: true }).catch(() => {});
+        }
+        // Ensure interaction.member is a GuildMember
+        if (!(interaction.member instanceof GuildMember)) {
+             return interaction.reply({ content: 'Could not determine your voice channel.', ephemeral: true }).catch(() => {});
+        }
+
+        // Use ephemeral deferral
+        await interaction.deferReply({ ephemeral: true });
+
+        const member = interaction.member; // Already checked it's GuildMember
+        const voiceChannel = member?.voice?.channel;
+
+        // 1. Check if user is in a voice channel
+        if (!voiceChannel) {
+            return interaction.editReply('You need to be in a voice channel to use this command!');
+        }
+
+        // Type assertion for voiceChannel after check
+        const currentVoiceChannel = voiceChannel as VoiceBasedChannel;
+
+        // 2. Check bot permissions
+        const permissions = currentVoiceChannel.permissionsFor(client.user!); // Use non-null assertion for client.user
+        if (!permissions?.has(PermissionFlagsBits.Connect)) { // Optional chaining for permissions
+            return interaction.editReply('I need permission to **connect** to your voice channel!');
+        }
+        if (!permissions?.has(PermissionFlagsBits.Speak)) {
+            return interaction.editReply('I need permission to **speak** in your voice channel!');
+        }
+        // Ensure it's a voice channel (not stage, etc.)
+        if (currentVoiceChannel.type !== ChannelType.GuildVoice) {
+             return interaction.editReply('I can only join standard voice channels.');
+        }
+
+        // Get the initialized Shoukaku instance from the client object
+        const shoukaku = client.shoukaku;
+        if (!shoukaku) {
+            logger.error('Shoukaku instance not found on client object!');
+            return interaction.editReply('The music player is not ready yet. Please try again shortly.');
+        }
+
+        // 3. Get or create the player and connect using Shoukaku
+        // Correctly get player from the players map and type it
+        let player: Player | undefined = shoukaku.players.get(interaction.guildId);
+
+        if (!player) {
+            try {
+                // Create player using the Shoukaku manager
+                player = await shoukaku.joinVoiceChannel({
+                    guildId: interaction.guildId,
+                    channelId: currentVoiceChannel.id,
+                    shardId: interaction.guild.shardId, // Get shardId from guild
+                });
+
+                logger.info(`Created player and connected to voice channel ${currentVoiceChannel.name} (${currentVoiceChannel.id}) in guild ${interaction.guild.name} (${interaction.guildId})`);
+                await interaction.editReply(`Joined ${currentVoiceChannel.name}! Ready to play music.`);
+
+            } catch (error: unknown) { // Type error as unknown
+                const errorMessage = error instanceof Error ? error.message : String(error);
+                logger.error(`Failed to create/connect player for guild ${interaction.guildId}: ${errorMessage}`, error);
+                // Attempt to leave voice channel if connection failed partially
+                shoukaku.leaveVoiceChannel(interaction.guildId).catch((e: unknown) => { // Type catch error
+                    const leaveErrorMsg = e instanceof Error ? e.message : String(e);
+                    logger.error(`Error leaving VC after failed join: ${leaveErrorMsg}`);
+                });
+                return interaction.editReply('An error occurred while trying to join the voice channel.');
+            }
+        } else {
+            // If player exists, get the corresponding connection
+            const connection = shoukaku.connections.get(interaction.guildId);
+
+            // Check if connection exists and if it's in a different channel
+            if (!connection || connection.channelId !== currentVoiceChannel.id) {
+                try {
+                    // Rejoining should handle moving the bot
+                    // Note: joinVoiceChannel might implicitly destroy the old player/connection if one exists for the guild.
+                    // If issues arise, explicitly call leaveVoiceChannel first.
+                    player = await shoukaku.joinVoiceChannel({
+                        guildId: interaction.guildId,
+                        channelId: currentVoiceChannel.id,
+                        shardId: interaction.guild.shardId,
+                    });
+
+                    logger.info(`Moved player to voice channel ${currentVoiceChannel.name} (${currentVoiceChannel.id}) in guild ${interaction.guildId}`);
+                    await interaction.editReply(`Moved to ${currentVoiceChannel.name}!`);
+                } catch (error: unknown) { // Type error as unknown
+                    const errorMessage = error instanceof Error ? error.message : String(error);
+                    logger.error(`Failed to move player for guild ${interaction.guildId}: ${errorMessage}`, error);
+                    return interaction.editReply('An error occurred while trying to move to the voice channel.');
+                }
+            } else {
+                 // Already in the correct channel
+                 await interaction.editReply(`I'm already in ${currentVoiceChannel.name}!`);
+            }
+             // Example of updating a manually managed text channel context (if needed)
+             // if (player.textChannelId !== interaction.channelId) {
+             //    player.textChannelId = interaction.channelId;
+             //    logger.debug(`Updated player text channel context to ${interaction.channel?.name} (${interaction.channelId}) in guild ${interaction.guildId}`);
+             // }
+        }
+    },
+};

src/commands/leave.ts

@@ -0,0 +1,67 @@
+import {
+    SlashCommandBuilder,
+    ChatInputCommandInteraction, // Import the specific interaction type
+    GuildMember // Import GuildMember type
+} from 'discord.js';
+import logger from '../utils/logger'; // Use default import
+import { BotClient } from '../index'; // Import the BotClient interface
+// No need to import Player explicitly if we just check connection
+
+export default { // Use export default for ES Modules
+    data: new SlashCommandBuilder()
+        .setName('leave')
+        .setDescription('Leaves the current voice channel'),
+    async execute(interaction: ChatInputCommandInteraction, client: BotClient) { // Add types
+        // Ensure command is run in a guild
+        if (!interaction.guildId || !interaction.guild) {
+            return interaction.reply({ content: 'This command can only be used in a server.', ephemeral: true }).catch(() => {});
+        }
+        // Ensure interaction.member is a GuildMember (optional, but good practice)
+        if (!(interaction.member instanceof GuildMember)) {
+             return interaction.reply({ content: 'Could not verify your membership.', ephemeral: true }).catch(() => {});
+        }
+
+        // Use ephemeral deferral
+        await interaction.deferReply({ ephemeral: true });
+
+        // Get the Shoukaku instance
+        const shoukaku = client.shoukaku;
+        if (!shoukaku) {
+            logger.error('Shoukaku instance not found on client object!');
+            return interaction.editReply('The music player is not ready yet.');
+        }
+
+        // Check if a connection exists for this guild
+        const connection = shoukaku.connections.get(interaction.guildId);
+        if (!connection || !connection.channelId) {
+            return interaction.editReply('I am not currently in a voice channel!');
+        }
+
+        // Optional: Check if the user is in the same channel as the bot
+        // const memberVoiceChannelId = interaction.member.voice.channelId;
+        // if (memberVoiceChannelId !== connection.channelId) {
+        //     return interaction.editReply('You need to be in the same voice channel as me to make me leave!');
+        // }
+
+        try {
+            const channelId = connection.channelId; // Get channel ID from connection
+            const channel = await client.channels.fetch(channelId).catch(() => null); // Fetch channel for name
+            const channelName = channel && channel.isVoiceBased() ? channel.name : `ID: ${channelId}`; // Get channel name if possible
+
+            // Use Shoukaku's leave method - this destroys player and connection
+            await shoukaku.leaveVoiceChannel(interaction.guildId);
+
+            logger.info(`Left voice channel ${channelName} in guild ${interaction.guild.name} (${interaction.guildId}) by user ${interaction.user.tag}`);
+            await interaction.editReply(`Left ${channelName}.`);
+
+        } catch (error: unknown) { // Type error as unknown
+            const errorMessage = error instanceof Error ? error.message : String(error);
+            logger.error(`Error leaving voice channel for guild ${interaction.guildId}: ${errorMessage}`, error);
+            // Attempt to reply even if leave failed partially
+            await interaction.editReply('An error occurred while trying to leave the voice channel.').catch((e: unknown) => { // Type catch error
+                 const replyErrorMsg = e instanceof Error ? e.message : String(e);
+                 logger.error(`Failed to send error reply for leave command: ${replyErrorMsg}`);
+            });
+        }
+    },
+};

src/commands/ping.ts

@@ -0,0 +1,16 @@
+import { SlashCommandBuilder, ChatInputCommandInteraction } from 'discord.js';
+// No need to import BotClient if not used directly in execute
+
+export default { // Use export default for ES Modules
+    data: new SlashCommandBuilder()
+        .setName('ping')
+        .setDescription('Replies with Pong!'),
+    async execute(interaction: ChatInputCommandInteraction) { // Add interaction type
+        // Calculate latency (optional but common for ping commands)
+        const sent = await interaction.reply({ content: 'Pinging...', fetchReply: true, ephemeral: true });
+        const latency = sent.createdTimestamp - interaction.createdTimestamp;
+        const wsPing = interaction.client.ws.ping; // WebSocket heartbeat ping
+
+        await interaction.editReply(`Pong! 🏓\nRoundtrip latency: ${latency}ms\nWebSocket Ping: ${wsPing}ms`);
+    },
+};

src/commands/play.ts

@@ -0,0 +1,347 @@
+import {
+    SlashCommandBuilder,
+    SlashCommandStringOption, // Import for typing options
+    PermissionFlagsBits,
+    ChannelType,
+    EmbedBuilder,
+    ChatInputCommandInteraction,
+    GuildMember,
+    VoiceBasedChannel
+} from 'discord.js';
+import logger from '../utils/logger';
+import { BotClient } from '../index';
+// Import necessary Shoukaku types - LavalinkResponse might need a local definition if not exported
+import { Player, Node, Track, SearchResult, Connection } from 'shoukaku';
+
+// Define the structure of the Lavalink V4 response (if not directly available from shoukaku types)
+// Based on https://lavalink.dev/api/rest.html#load-tracks
+type LavalinkLoadType = 'track' | 'playlist' | 'search' | 'empty' | 'error';
+
+interface LavalinkResponse {
+    loadType: LavalinkLoadType;
+    data: any; // Data structure varies based on loadType
+}
+
+interface LavalinkErrorData {
+    message: string;
+    severity: string;
+    cause: string;
+}
+
+interface LavalinkPlaylistInfo {
+    name: string;
+    selectedTrack?: number; // Optional index of the selected track within the playlist
+}
+
+interface LavalinkPlaylistData {
+    info: LavalinkPlaylistInfo;
+    pluginInfo: any; // Or specific type if known
+    tracks: Track[];
+}
+
+// Export: Extend Player type locally to add queue and textChannelId
+export interface GuildPlayer extends Player {
+    queue: TrackWithRequester[];
+    textChannelId?: string; // Optional: Store text channel ID for messages
+}
+
+// Export: Define TrackWithRequester
+export interface TrackWithRequester extends Track {
+    // Ensure encoded is strictly string if extending base Track which might have it optional
+    encoded: string;
+    requester: {
+        id: string;
+        tag: string;
+    };
+}
+
+// Export: Helper function to start playback if possible
+export async function playNext(player: GuildPlayer, interaction: ChatInputCommandInteraction) {
+    // Check if player is still valid (might have been destroyed)
+    const shoukaku = (interaction.client as BotClient).shoukaku;
+    if (!shoukaku?.players.has(player.guildId)) {
+        logger.warn(`playNext called for destroyed player in guild ${player.guildId}`);
+        return;
+    }
+
+    if (player.track || player.queue.length === 0) {
+        return; // Already playing or queue is empty
+    }
+    const nextTrack = player.queue.shift();
+    if (!nextTrack) return;
+
+    try {
+        // Check if user provided an OAuth token (could be stored in a database or env variable)
+        const oauthToken = process.env.YOUTUBE_OAUTH_TOKEN;
+        const userData = oauthToken ? { "oauth-token": oauthToken } : undefined;
+        // Fix: Correct usage for playTrack based on Player.ts
+        await player.playTrack({ track: { encoded: nextTrack.encoded, userData: userData} });
+        // logger.info(`Started playing: ${nextTrack.info.title} in guild ${player.guildId}`);
+    } catch (playError: unknown) {
+        const errorMsg = playError instanceof Error ? playError.message : String(playError);
+        logger.error(`Error playing track ${nextTrack.info.title} in guild ${player.guildId}: ${errorMsg}`);
+        // Try to send error message to the stored text channel
+        const channel = interaction.guild?.channels.cache.get(player.textChannelId || interaction.channelId);
+        if (channel?.isTextBased()) {
+            // Fix: Check if e is Error before accessing message
+            channel.send(`Error playing track: ${nextTrack.info.title}. Reason: ${errorMsg}`).catch((e: unknown) => {
+                 const sendErrorMsg = e instanceof Error ? e.message : String(e);
+                 logger.error(`Failed to send play error message: ${sendErrorMsg}`);
+            });
+        }
+        // Try playing the next track if available
+        await playNext(player, interaction);
+    }
+}
+
+export default {
+    data: new SlashCommandBuilder()
+        .setName('play')
+        .setDescription('Plays audio from a URL or search query')
+        .addStringOption((option: SlashCommandStringOption) => // Type option
+            option.setName('query')
+                .setDescription('The URL or search term for the song/playlist')
+                .setRequired(true))
+        .addStringOption((option: SlashCommandStringOption) => // Type option
+            option.setName('source')
+                .setDescription('Specify the search source (defaults to YouTube Music)')
+                .setRequired(false)
+                .addChoices(
+                    { name: 'YouTube Music', value: 'youtubemusic' },
+                    { name: 'YouTube', value: 'youtube' },
+                    { name: 'SoundCloud', value: 'soundcloud' }
+                    // Add other sources like 'spotify' if supported by Lavalink plugins
+                )),
+    async execute(interaction: ChatInputCommandInteraction, client: BotClient) {
+        // Ensure command is run in a guild
+        if (!interaction.guildId || !interaction.guild || !interaction.channelId) {
+            return interaction.reply({ content: 'This command can only be used in a server.', ephemeral: true }).catch(() => {});
+        }
+        if (!(interaction.member instanceof GuildMember)) {
+             return interaction.reply({ content: 'Could not determine your voice channel.', ephemeral: true }).catch(() => {});
+        }
+
+        await interaction.deferReply(); // Defer reply immediately
+
+        const member = interaction.member;
+        const voiceChannel = member?.voice?.channel;
+        const query = interaction.options.getString('query', true); // Required option
+        const source = interaction.options.getString('source'); // Optional
+
+        // 1. Check if user is in a voice channel
+        if (!voiceChannel) {
+            return interaction.editReply('You need to be in a voice channel to play music!');
+        }
+        const currentVoiceChannel = voiceChannel as VoiceBasedChannel;
+
+        // 2. Check bot permissions
+        const permissions = currentVoiceChannel.permissionsFor(client.user!);
+        if (!permissions?.has(PermissionFlagsBits.Connect)) {
+            return interaction.editReply('I need permission to **connect** to your voice channel!');
+        }
+        if (!permissions?.has(PermissionFlagsBits.Speak)) {
+            return interaction.editReply('I need permission to **speak** in your voice channel!');
+        }
+        if (currentVoiceChannel.type !== ChannelType.GuildVoice) {
+            return interaction.editReply('I can only join standard voice channels.');
+        }
+
+        // Get Shoukaku instance
+        const shoukaku = client.shoukaku;
+        if (!shoukaku) {
+            logger.error('Shoukaku instance not found on client object!');
+            return interaction.editReply('The music player is not ready yet. Please try again shortly.');
+        }
+
+        let player: GuildPlayer | undefined; // Declare player variable outside try block
+
+        try {
+            // 3. Get or create player/connection
+            player = shoukaku.players.get(interaction.guildId) as GuildPlayer | undefined;
+            const connection = shoukaku.connections.get(interaction.guildId);
+
+            if (!player || !connection || connection.channelId !== currentVoiceChannel.id) {
+                // If player/connection doesn't exist or bot is in wrong channel, join/move
+                try {
+                    player = await shoukaku.joinVoiceChannel({
+                        guildId: interaction.guildId,
+                        channelId: currentVoiceChannel.id,
+                        shardId: interaction.guild.shardId,
+                    }) as GuildPlayer; // Cast to extended type
+                    logger.info(`Joined/Moved to voice channel ${currentVoiceChannel.name} (${currentVoiceChannel.id}) for play command.`);
+                    // Initialize queue if it's a new player
+                    if (!player.queue) {
+                        player.queue = [];
+                    }
+                    player.textChannelId = interaction.channelId; // Store text channel context
+
+                } catch (joinError: unknown) {
+                    const errorMsg = joinError instanceof Error ? joinError.message : String(joinError);
+                    logger.error(`Failed to join/move player for guild ${interaction.guildId}: ${errorMsg}`, joinError);
+                    shoukaku.leaveVoiceChannel(interaction.guildId).catch(() => {}); // Attempt cleanup
+                    return interaction.editReply('An error occurred while trying to join the voice channel.');
+                }
+            } else {
+                 // Ensure queue exists if player was retrieved
+                 if (!player.queue) {
+                    player.queue = [];
+                 }
+                 // Update text channel context if needed
+                 player.textChannelId = interaction.channelId;
+            }
+
+            // 4. Determine search identifier based on query and source
+            let identifier: string;
+            const isUrl = query.startsWith('http://') || query.startsWith('https://');
+
+            if (isUrl) {
+                identifier = query; // Use URL directly
+            } else {
+                // Prepend search prefix based on source or default
+                switch (source) {
+                    case 'youtube':
+                        identifier = `ytsearch:${query}`;
+                        break;
+                    case 'soundcloud':
+                        identifier = `scsearch:${query}`;
+                        break;
+                    case 'youtubemusic':
+                    default: // Default to YouTube Music
+                        identifier = `ytmsearch:${query}`;
+                        break;
+                }
+            }
+            logger.debug(`Constructed identifier: ${identifier}`);
+
+            // 5. Search for tracks using Lavalink REST API via an ideal node
+            const node = shoukaku.getIdealNode();
+            if (!node) {
+                throw new Error('No available Lavalink node.');
+            }
+
+            // Use the correct return type (LavalinkResponse) and check for undefined
+            const searchResult: LavalinkResponse | undefined = await node.rest.resolve(identifier);
+
+            if (!searchResult) {
+                 throw new Error('REST resolve returned undefined or null.');
+            }
+
+            // 6. Process search results and add to queue
+            const responseEmbed = new EmbedBuilder().setColor('#0099ff');
+            let tracksToAdd: TrackWithRequester[] = [];
+
+            // Switch using string literals based on Lavalink V4 load types
+            switch (searchResult.loadType) {
+                case 'track': { // Use 'track'
+                    const track = searchResult.data as Track;
+                    // Ensure track and encoded exist before pushing
+                    if (!track?.encoded) throw new Error('Loaded track is missing encoded data.');
+                    tracksToAdd.push({
+                        ...track,
+                        encoded: track.encoded, // Explicitly include non-null encoded
+                        requester: { id: interaction.user.id, tag: interaction.user.tag }
+                    });
+                    responseEmbed
+                        .setTitle('Track Added to Queue')
+                        .setDescription(`[${track.info.title}](${track.info.uri})`)
+                        // Ensure player exists before accessing queue
+                        .addFields({ name: 'Position in queue', value: `${player.queue.length + 1}`, inline: true });
+                    if (track.info.artworkUrl) responseEmbed.setThumbnail(track.info.artworkUrl); // Use artworkUrl
+                    logger.info(`Adding track: ${track.info.title} (Guild: ${interaction.guildId})`);
+                    break;
+                }
+                case 'search': { // Use 'search'
+                    const tracks = searchResult.data as Track[]; // Data is an array of tracks
+                    if (!tracks || tracks.length === 0) throw new Error('Search returned no results.');
+                    // Fix: Assign track AFTER the check
+                    const track = tracks[0];
+                    if (!track?.encoded) throw new Error('Searched track is missing encoded data.');
+                    tracksToAdd.push({
+                        ...track,
+                        encoded: track.encoded, // Explicitly include non-null encoded
+                        requester: { id: interaction.user.id, tag: interaction.user.tag }
+                    });
+                    responseEmbed
+                        .setTitle('Track Added to Queue')
+                        .setDescription(`[${track.info.title}](${track.info.uri})`)
+                        .addFields({ name: 'Position in queue', value: `${player.queue.length + 1}`, inline: true });
+                    if (track.info.artworkUrl) responseEmbed.setThumbnail(track.info.artworkUrl);
+                    logger.info(`Adding track from search: ${track.info.title} (Guild: ${interaction.guildId})`);
+                    break;
+                }
+                case 'playlist': { // Use 'playlist'
+                    const playlistData = searchResult.data as LavalinkPlaylistData; // Cast to correct structure
+                    const playlistInfo = playlistData.info;
+                    const playlistTracks = playlistData.tracks;
+                    // Fix: Filter out tracks without encoded string and assert non-null for map
+                    tracksToAdd = playlistTracks
+                        .filter(track => !!track.encoded) // Ensure encoded exists
+                        .map(track => ({
+                            ...track,
+                            encoded: track.encoded!, // Add non-null assertion
+                            requester: { id: interaction.user.id, tag: interaction.user.tag }
+                        }));
+                    if (tracksToAdd.length === 0) throw new Error('Playlist contained no playable tracks.');
+                    // Fix: Use direct optional chaining on array access
+                    responseEmbed
+                        .setTitle('Playlist Added to Queue')
+                        .setDescription(`**[${playlistInfo.name}](${identifier})** (${tracksToAdd.length} tracks)`) // Use filtered length
+                        .addFields({ name: 'Starting track', value: `[${tracksToAdd[0]?.info?.title}](${tracksToAdd[0]?.info?.uri})` }); // Use direct optional chaining
+                    logger.info(`Adding playlist: ${playlistInfo.name} (${tracksToAdd.length} tracks) (Guild: ${interaction.guildId})`);
+                    break;
+                }
+                case 'empty': // Use 'empty'
+                    await interaction.editReply(`No results found for "${query}".`);
+                    // Optional: Leave if queue is empty?
+                    // if (player && !player.track && player.queue.length === 0) {
+                    //     await shoukaku.leaveVoiceChannel(interaction.guildId);
+                    // }
+                    return; // Stop execution
+                case 'error': { // Use 'error'
+                    const errorData = searchResult.data as LavalinkErrorData; // Cast to error structure
+                    // Fix: Add explicit check for errorData
+                    if (errorData) {
+                        logger.error(`Failed to load track/playlist: ${errorData.message || 'Unknown reason'} (Severity: ${errorData.severity || 'Unknown'}, Identifier: ${identifier})`);
+                        await interaction.editReply(`Failed to load track/playlist. Reason: ${errorData.message || 'Unknown error'}`);
+                    } else {
+                        logger.error(`Failed to load track/playlist: Unknown error (Identifier: ${identifier})`);
+                        await interaction.editReply(`Failed to load track/playlist. Unknown error.`);
+                    }
+                    return; // Stop execution
+                }
+                default:
+                    // Use exhaustive check pattern (will error if a case is missed)
+                    const _exhaustiveCheck: never = searchResult.loadType;
+                    logger.error(`Unknown loadType received: ${searchResult.loadType}`);
+                    await interaction.editReply('Received an unknown response type from the music server.');
+                    return;
+            }
+
+            // Add tracks to the player's queue (ensure player exists)
+            if (!player) {
+                // This case should ideally not happen if join logic is correct, but added as safeguard
+                throw new Error('Player is not defined after processing search results.');
+            }
+            player.queue.push(...tracksToAdd);
+
+            // Send confirmation embed
+            await interaction.editReply({ embeds: [responseEmbed] });
+
+            // 7. Start playback if not already playing
+            await playNext(player, interaction);
+
+        } catch (error: unknown) { // Catch errors during the process
+            const errorMsg = error instanceof Error ? error.message : String(error);
+            logger.error(`Error in play command for query "${query}" in guild ${interaction.guildId}: ${errorMsg}`, error);
+            // Use editReply as interaction is deferred
+            await interaction.editReply('An unexpected error occurred while trying to play the music.').catch((e: unknown) => {
+                const replyErrorMsg = e instanceof Error ? e.message : String(e);
+                logger.error(`Failed to send error reply for play command: ${replyErrorMsg}`);
+            });
+            // Optional: Attempt to leave VC on critical error?
+            // if (shoukaku.players.has(interaction.guildId)) {
+            //     await shoukaku.leaveVoiceChannel(interaction.guildId).catch(() => {});
+            // }
+        }
+    },
+};

src/events/interactionCreate.ts

@@ -0,0 +1,64 @@
+import { Events, Interaction } from 'discord.js'; // Import Interaction type
+import logger from '../utils/logger'; // Use default import
+import { BotClient } from '../index'; // Import BotClient type
+
+export default { // Use export default
+    name: Events.InteractionCreate,
+    async execute(interaction: Interaction, client: BotClient) { // Add types
+        // Handle only slash commands (ChatInputCommand) for now
+        if (!interaction.isChatInputCommand()) return;
+
+        // Store command name after type check
+        const commandName = interaction.commandName;
+
+        // client.commands should be typed as Collection<string, CommandType> on BotClient
+        const command = client.commands.get(commandName);
+
+        if (!command) {
+            logger.error(`No command matching ${commandName} was found.`);
+            try {
+                // Check if interaction is replyable before attempting reply
+                if (interaction.isRepliable()) {
+                    await interaction.reply({ content: 'Error: This command was not found!', ephemeral: true });
+                }
+            } catch (replyError: unknown) { // Type caught error
+                const errorMsg = replyError instanceof Error ? replyError.message : String(replyError);
+                // Use stored commandName variable
+                logger.error(`Failed to send 'command not found' reply for command '${commandName}': ${errorMsg}`);
+            }
+            return;
+        }
+
+        try {
+            // Execute the command's logic
+            // Command execute function expects ChatInputCommandInteraction, but we check type above
+            await command.execute(interaction, client);
+            logger.info(`Executed command '${commandName}' for user ${interaction.user.tag}`);
+        } catch (error: unknown) { // Type caught error
+            const errorMsg = error instanceof Error ? error.message : String(error);
+            // Use stored commandName variable
+            logger.error(`Error executing command '${commandName}': ${errorMsg}`, error);
+
+            // Try to reply to the interaction, otherwise edit the deferred reply if applicable
+            const replyOptions = { content: 'There was an error while executing this command!', ephemeral: true };
+            try {
+                 // Check if interaction is replyable before attempting reply/followUp
+                 if (!interaction.isRepliable()) {
+                     // Use stored commandName variable
+                     logger.warn(`Interaction for command '${commandName}' is no longer replyable.`);
+                     return;
+                 }
+
+                if (interaction.replied || interaction.deferred) {
+                    await interaction.followUp(replyOptions);
+                } else {
+                    await interaction.reply(replyOptions);
+                }
+            } catch (replyError: unknown) { // Type caught error
+                const replyErrorMsg = replyError instanceof Error ? replyError.message : String(replyError);
+                // Use stored commandName variable
+                logger.error(`Failed to send error reply for command '${commandName}': ${replyErrorMsg}`);
+            }
+        }
+    },
+};

src/events/ready.ts

@@ -0,0 +1,31 @@
+import { Events, ActivityType, Client } from 'discord.js'; // Import base Client type
+import logger from '../utils/logger'; // Use default import
+import { initializeShoukaku } from '../structures/ShoukakuEvents'; // Import the correct setup function
+import { BotClient } from '../index'; // Import BotClient type
+
+export default { // Use export default
+    name: Events.ClientReady,
+    once: true, // This event should only run once
+    async execute(client: BotClient) { // Use BotClient type
+        // Ensure client.user is available
+        if (!client.user) {
+            logger.error('Client user is not available on ready event.');
+            return;
+        }
+        logger.info(`Ready! Logged in as ${client.user.tag}`);
+
+        // Initialize the Shoukaku instance and attach listeners
+        try {
+            // Assign the initialized Shoukaku instance to client.shoukaku
+            client.shoukaku = initializeShoukaku(client);
+            logger.info('Shoukaku instance initialized successfully'); // Log message adjusted slightly
+        } catch (error: unknown) { // Type caught error
+            const errorMsg = error instanceof Error ? error.message : String(error);
+            logger.error(`Failed to initialize Shoukaku: ${errorMsg}`);
+            // Depending on the severity, you might want to exit or handle this differently
+        }
+
+        // Set activity status
+        client.user.setActivity('Music | /play', { type: ActivityType.Listening });
+    },
+};

src/events/voiceStateUpdate.ts

@@ -0,0 +1,60 @@
+import { Events, VoiceState, ChannelType } from 'discord.js'; // Added ChannelType
+import logger from '../utils/logger';
+import { BotClient } from '../index'; // Assuming BotClient is exported from index
+
+export default { // Use export default for ES modules
+    name: Events.VoiceStateUpdate,
+    execute(oldState: VoiceState, newState: VoiceState, client: BotClient) { // Added types
+        // Shoukaku handles voice state updates internally via its connector.
+        // We don't need to manually pass the update like with Erela.js.
+        // The warning about Erela.js manager not being initialized can be ignored/removed.
+
+        // Custom logic for player cleanup based on voice state changes.
+        const shoukaku = client.shoukaku; // Access Shoukaku instance
+        if (!shoukaku) {
+            // Shoukaku might not be initialized yet
+            logger.debug('Voice state update received, but Shoukaku is not ready yet.');
+            return;
+        }
+
+        const player = shoukaku.players.get(newState.guild.id); // Get player from Shoukaku players collection
+        if (!player) return; // No active player for this guild
+
+        // Get the connection associated with the player's guild
+        const connection = shoukaku.connections.get(player.guildId);
+        const currentChannelId = connection?.channelId; // Get channelId from connection
+
+        // Check if the bot was disconnected (newState has no channelId for the bot)
+        // Add null check for client.user
+        if (client.user && newState.id === client.user.id && !newState.channelId && oldState.channelId === currentChannelId) {
+            logger.info(`Bot was disconnected from voice channel ${oldState.channel?.name || oldState.channelId} in guild ${newState.guild.id}. Destroying player.`);
+            player.destroy(); // Use Shoukaku player's destroy method
+            return; // Exit early as the player is destroyed
+        }
+
+        // Check if the bot's channel is now empty (excluding the bot itself)
+        const channel = currentChannelId ? client.channels.cache.get(currentChannelId) : undefined;
+
+        // Ensure the channel exists, is voice-based, and the update is relevant
+        if (channel?.isVoiceBased() && (newState.channelId === currentChannelId || oldState.channelId === currentChannelId)) {
+             // Fetch members again to ensure freshness after the update
+            const members = channel.members; // Safe to access members now
+            // Add null check for client.user
+            if (client.user && members.size === 1 && members.has(client.user.id)) {
+                logger.info(`Voice channel ${channel.name} (${currentChannelId}) in guild ${newState.guild.id} is now empty (only bot left). Destroying player.`); // Safe to access name
+                // Optional: Add a timeout before destroying
+                // setTimeout(() => {
+                //     const currentChannel = client.channels.cache.get(player.voiceChannel);
+                //     const currentMembers = currentChannel?.members;
+                //     if (currentMembers && currentMembers.size === 1 && currentMembers.has(client.user.id)) {
+                //         logger.info(`Timeout finished: Destroying player in empty channel ${channel.name}.`);
+                //         player.destroy();
+                //     } else {
+                //          logger.info(`Timeout finished: Channel ${channel.name} is no longer empty. Player not destroyed.`);
+                //     }
+                // }, 60000); // e.g., 1 minute timeout
+                player.destroy(); // Destroy immediately for now
+            }
+        }
+    },
+};

src/index.ts

@@ -0,0 +1,186 @@
+import dotenv from 'dotenv';
+import {
+    Client,
+    GatewayIntentBits,
+    Collection,
+    Events,
+    BaseInteraction, // Use a base type for now, refine later if needed
+    SlashCommandBuilder, // Assuming commands use this
+} from 'discord.js';
+import { Shoukaku, Connectors, NodeOption, ShoukakuOptions } from 'shoukaku';
+import logger from './utils/logger'; // Assuming logger uses export default or similar
+import fs from 'fs';
+import path from 'path';
+// import { fileURLToPath } from 'url'; // Needed for __dirname in ES Modules if module is not CommonJS
+
+// Define Command structure
+interface Command {
+    data: Omit<SlashCommandBuilder, "addSubcommand" | "addSubcommandGroup">; // Or appropriate type for your command data
+    execute: (interaction: BaseInteraction, client: BotClient) => Promise<void>; // Adjust interaction type if needed
+}
+
+// Define Event structure
+interface BotEvent {
+    name: string; // Should match discord.js event names or custom names
+    once?: boolean;
+    execute: (...args: any[]) => void; // Use specific types later if possible
+}
+
+// Extend the discord.js Client class to include custom properties
+export interface BotClient extends Client { // Add export keyword
+    commands: Collection<string, Command>;
+    shoukaku: Shoukaku;
+}
+
+// --- Setup ---
+dotenv.config();
+// __dirname is available in CommonJS modules, which is set in tsconfig.json
+
+// Validate essential environment variables
+if (!process.env.DISCORD_TOKEN) {
+    logger.error('DISCORD_TOKEN is missing in the .env file!');
+    process.exit(1);
+}
+if (!process.env.LAVALINK_HOST || !process.env.LAVALINK_PORT || !process.env.LAVALINK_PASSWORD) {
+    logger.warn('Lavalink connection details (HOST, PORT, PASSWORD) are missing or incomplete in .env. Music functionality will be limited.');
+    // Decide if the bot should exit or continue without music
+    // process.exit(1); // Uncomment to exit if Lavalink is mandatory
+}
+
+// Create a new Discord client instance with necessary intents
+const client = new Client({
+    intents: [
+        GatewayIntentBits.Guilds,
+        GatewayIntentBits.GuildVoiceStates,
+        GatewayIntentBits.GuildMessages, // Add if needed for prefix commands or message content
+        GatewayIntentBits.MessageContent, // Add if needed for message content
+    ],
+}) as BotClient; // Assert the type here
+
+// Define Shoukaku nodes
+const Nodes: NodeOption[] = [
+    {
+        name: process.env.LAVALINK_NAME || 'lavalink-node-1', // Use an env var or default name
+        url: `${process.env.LAVALINK_HOST || 'localhost'}:${process.env.LAVALINK_PORT || 2333}`, // Use || 2333 for default port number
+        auth: process.env.LAVALINK_PASSWORD || 'youshallnotpass', // Password from your Lavalink server config
+        secure: process.env.LAVALINK_SECURE === 'true', // Set to true if using HTTPS/WSS
+    },
+];
+
+// Shoukaku options
+const shoukakuOptions: ShoukakuOptions = {
+    moveOnDisconnect: false, // Whether to move players to another node when a node disconnects
+    resume: true, // Whether to resume players session after Lavalink restarts
+    reconnectTries: 3, // Number of attempts to reconnect to Lavalink
+    reconnectInterval: 5000, // Interval between reconnect attempts in milliseconds
+    // Add other options as needed
+};
+
+// Initialize Shoukaku
+client.shoukaku = new Shoukaku(new Connectors.DiscordJS(client), Nodes, shoukakuOptions);
+
+// Show the actual Lavalink connection details (without exposing the actual password)
+logger.info(`Lavalink connection configured to: ${process.env.LAVALINK_HOST}:${process.env.LAVALINK_PORT} (Password: ${process.env.LAVALINK_PASSWORD ? '[SET]' : '[NOT SET]'})`);
+
+// Collections for commands
+client.commands = new Collection<string, Command>();
+
+// --- Command Loading ---
+const commandsPath = path.join(__dirname, 'commands');
+// Read .ts files now
+const commandFiles = fs.readdirSync(commandsPath).filter((file: string) => file.endsWith('.ts'));
+
+const loadCommands = async () => {
+    for (const file of commandFiles) {
+        const filePath = path.join(commandsPath, file);
+        try {
+            // Use dynamic import for ES Modules/CommonJS interop
+            const commandModule = await import(filePath);
+            const command: Command = commandModule.default || commandModule; // Handle default exports
+
+            if (command && typeof command === 'object' && 'data' in command && 'execute' in command) {
+                client.commands.set(command.data.name, command);
+                logger.info(`Loaded command: ${command.data.name}`);
+            } else {
+                logger.warn(`[WARNING] The command at ${filePath} is missing a required "data" or "execute" property or is not structured correctly.`);
+            }
+        } catch (error: unknown) { // Type the error as unknown
+            const errorMessage = error instanceof Error ? error.message : String(error);
+            logger.error(`Error loading command at ${filePath}: ${errorMessage}`, error);
+        }
+    }
+};
+
+// --- Event Handling ---
+const eventsPath = path.join(__dirname, 'events');
+// Read .ts files now
+const eventFiles = fs.readdirSync(eventsPath).filter((file: string) => file.endsWith('.ts'));
+
+const loadEvents = async () => {
+    for (const file of eventFiles) {
+        const filePath = path.join(eventsPath, file);
+        try {
+            const eventModule = await import(filePath);
+            const event: BotEvent = eventModule.default || eventModule; // Handle default exports
+
+            if (event && typeof event === 'object' && 'name' in event && 'execute' in event) {
+                if (event.once) {
+                    client.once(event.name, (...args: any[]) => event.execute(...args, client)); // Pass client
+                    logger.info(`Loaded event ${event.name} (once)`);
+                } else {
+                    client.on(event.name, (...args: any[]) => event.execute(...args, client)); // Pass client
+                    logger.info(`Loaded event ${event.name}`);
+                }
+            } else {
+                 logger.warn(`[WARNING] The event at ${filePath} is missing a required "name" or "execute" property or is not structured correctly.`);
+            }
+        } catch (error: unknown) {
+             const errorMessage = error instanceof Error ? error.message : String(error);
+             logger.error(`Error loading event at ${filePath}: ${errorMessage}`, error);
+        }
+    }
+};
+
+// --- Shoukaku Event Handling ---
+client.shoukaku.on('ready', (name: string) => logger.info(`Lavalink Node: ${name} is now connected`));
+client.shoukaku.on('error', (name: string, error: Error) => logger.error(`Lavalink Node: ${name} emitted an error: ${error.message}`));
+client.shoukaku.on('close', (name: string, code: number, reason: string | undefined) => logger.warn(`Lavalink Node: ${name} closed with code ${code}. Reason: ${reason || 'No reason'}`));
+// Corrected disconnect event signature based on common usage and error TS148
+client.shoukaku.on('disconnect', (name: string, count: number) => {
+    logger.warn(`Lavalink Node: ${name} disconnected. ${count} players were disconnected from this node.`);
+});
+
+
+// --- Main Execution ---
+async function main() {
+    await loadCommands();
+    await loadEvents();
+
+    // Log in to Discord with your client's token
+    try {
+        await client.login(process.env.DISCORD_TOKEN);
+        logger.info('Successfully logged in to Discord.');
+    } catch (error: unknown) {
+        const errorMessage = error instanceof Error ? error.message : String(error);
+        logger.error(`Failed to log in: ${errorMessage}`);
+        process.exit(1); // Exit if login fails
+    }
+}
+
+main().catch((error) => {
+    const errorMessage = error instanceof Error ? error.message : String(error);
+    logger.error(`Error during bot initialization: ${errorMessage}`, error);
+    process.exit(1);
+});
+
+
+// Basic error handling
+process.on('unhandledRejection', (reason: unknown, promise: Promise<any>) => {
+    const reasonMessage = reason instanceof Error ? reason.message : String(reason);
+    logger.error('Unhandled promise rejection:', { reason: reasonMessage, promise });
+});
+process.on('uncaughtException', (error: Error, origin: NodeJS.UncaughtExceptionOrigin) => {
+    logger.error(`Uncaught exception: ${error.message}`, { error, origin });
+    // Optional: exit process on critical uncaught exceptions
+    // process.exit(1);
+});

src/structures/ShoukakuEvents.ts

@@ -0,0 +1,67 @@
+import { Shoukaku, NodeOption, ShoukakuOptions, Player, Connectors } from 'shoukaku'; // Removed player event types, Added Connectors
+// import { Connectors } from 'shoukaku-discord.js'; // Use the discord.js connector - Removed this line
+import logger from '../utils/logger';
+import { BotClient } from '../index';
+// Removed imports from play.ts for now as player listeners are removed
+
+// Define Node options (replace with your actual Lavalink details from .env)
+const nodes: NodeOption[] = [
+    {
+        name: process.env.LAVALINK_NAME || 'Lavalink-Node-1',
+        url: process.env.LAVALINK_URL || 'lavalink:2333', // Use service name for Docker Compose if applicable
+        auth: process.env.LAVALINK_AUTH || 'youshallnotpass',
+        secure: process.env.LAVALINK_SECURE === 'true' || false,
+    },
+];
+
+// Define Shoukaku options
+const shoukakuOptions: ShoukakuOptions = {
+    moveOnDisconnect: false,
+    resume: false, // Resume doesn't work reliably across restarts/disconnects without session persistence
+    reconnectTries: 3,
+    reconnectInterval: 5, // In seconds
+    restTimeout: 15000, // In milliseconds
+    voiceConnectionTimeout: 15, // In seconds
+};
+
+// Function to initialize Shoukaku and attach listeners
+export function initializeShoukaku(client: BotClient): Shoukaku {
+    if (!client) {
+        throw new Error("initializeShoukaku requires a client instance.");
+    }
+
+    const shoukaku = new Shoukaku(new Connectors.DiscordJS(client), nodes, shoukakuOptions);
+
+    // --- Shoukaku Node Event Listeners ---
+    shoukaku.on('ready', (name, resumed) =>
+        logger.info(`Lavalink Node '${name}' ready. Resumed: ${resumed}`)
+    );
+
+    shoukaku.on('error', (name, error) =>
+        logger.error(`Lavalink Node '${name}' error: ${error.message}`, error)
+    );
+
+    shoukaku.on('close', (name, code, reason) =>
+        logger.warn(`Lavalink Node '${name}' closed. Code: ${code}. Reason: ${reason || 'No reason'}`)
+    );
+
+    // Fix: Correct disconnect listener signature
+    shoukaku.on('disconnect', (name, count) => {
+        // count = count of players disconnected from the node
+        logger.warn(`Lavalink Node '${name}' disconnected. ${count} players disconnected.`);
+        // If players were not moved, you might want to attempt to reconnect them or clean them up.
+    });
+
+    shoukaku.on('debug', (name, info) => {
+        // Only log debug messages if not in production or if explicitly enabled
+        if (process.env.NODE_ENV !== 'production' || process.env.LAVALINK_DEBUG === 'true') {
+             logger.debug(`Lavalink Node '${name}' debug: ${info}`);
+        }
+    });
+
+    // --- Shoukaku Player Event Listeners ---
+    // REMOVED - These need to be attached differently in Shoukaku v4 (e.g., when player is created)
+
+    logger.info("Shoukaku instance created and node event listeners attached.");
+    return shoukaku;
+}

src/utils/logger.ts

@@ -0,0 +1,31 @@
+import winston, { format, transports } from 'winston'; // Use ES6 import
+// No longer needed: import { TransformableInfo } from 'logform';
+
+// Define the type for the log info object after timestamp is added
+// We can simplify this for now or try to infer from winston later
+// type TimestampedLogInfo = TransformableInfo & {
+//     timestamp: string;
+// };
+
+const logger = winston.createLogger({
+    level: process.env.LOG_LEVEL || 'info', // Use LOG_LEVEL from env or default to 'info'
+    format: format.combine(
+        format.timestamp({ format: 'YYYY-MM-DD HH:mm:ss' }), // This adds the timestamp
+        format.printf((info: any) => { // Use 'any' for now to bypass strict type checking here
+            // Ensure message exists, handle potential non-string messages if necessary
+            // The 'info' object structure depends on the preceding formatters
+            const timestamp = info.timestamp || new Date().toISOString(); // Fallback if timestamp isn't added
+            const level = (info.level || 'info').toUpperCase();
+            const message = typeof info.message === 'string' ? info.message : JSON.stringify(info.message);
+            return `${timestamp} ${level}: ${message}`;
+        })
+    ),
+    transports: [
+        new transports.Console(),
+        // Optionally add file transport
+        // new transports.File({ filename: 'combined.log' }),
+        // new transports.File({ filename: 'error.log', level: 'error' }),
+    ],
+});
+
+export default logger; // Use ES6 export default

tests/deploy-commands.test.ts

@@ -0,0 +1,55 @@
+jest.mock('discord.js', () => {
+  const original = jest.requireActual('discord.js');
+  const mockRest = {
+    put: jest.fn().mockResolvedValue([{ length: 1 }]),
+    setToken: jest.fn().mockReturnThis(),
+  };
+  return {
+    ...original,
+    REST: jest.fn(() => mockRest),
+    Routes: {
+      applicationCommands: jest.fn().mockReturnValue('/fake-route'),
+    },
+  };
+});
+
+jest.mock('fs', () => ({
+  readdirSync: jest.fn(() => ['ping.js']),
+}));
+jest.mock('node:path', () => {
+  const actual = jest.requireActual('node:path');
+  return {
+    ...actual,
+    join: (...args: string[]) => args.join('/'),
+    resolve: (...args: string[]) => args.join('/'),
+  };
+});
+
+describe('deploy-commands.js', () => {
+  let origEnv: typeof process.env;
+  beforeAll(() => {
+    origEnv = { ...process.env };
+    process.env.CLIENT_ID = '12345';
+    process.env.DISCORD_TOKEN = 'token';
+  });
+
+  afterAll(() => {
+    process.env = origEnv;
+    jest.resetModules();
+  });
+
+  test('registers commands via REST API', async () => {
+    const mockLogger = { info: jest.fn(), warn: jest.fn(), error: jest.fn() };
+    jest.mock('../src/utils/logger', () => mockLogger);
+
+    // Run the script
+    await require('../deploy-commands.js');
+
+    const { REST } = require('discord.js');
+    expect(REST).toHaveBeenCalled();
+    const restInstance = REST.mock.results[0].value;
+    expect(restInstance.setToken).toHaveBeenCalledWith('token');
+    expect(restInstance.put).toHaveBeenCalledWith('/fake-route', { body: expect.any(Array) });
+    expect(mockLogger.info).toHaveBeenCalledWith(expect.stringContaining('Started refreshing'));
+  });
+});

tests/start-script.test.ts

@@ -0,0 +1,10 @@
+const { spawnSync } = require('child_process');
+
+describe('NPM Start Script', () => {
+  test('npm start exits without error when DISCORD_TOKEN is provided', () => {
+    const env = { ...process.env, DISCORD_TOKEN: 'dummy-token', CLIENT_ID: '123', LAVALINK_HOST: 'localhost', LAVALINK_PORT: '2333', LAVALINK_PASSWORD: 'pass' };
+    const result = spawnSync('pnpm', ['start'], { env, encoding: 'utf-8' });
+    // The script starts the bot; if it reaches login attempt, exit code is 0
+    expect(result.status).toBe(0);
+  });
+});

tests/startup.test.ts

@@ -0,0 +1,13 @@
+const { spawnSync } = require('child_process');
+
+describe('Bot Startup', () => {
+  test('exits with code 1 if DISCORD_TOKEN is missing', () => {
+    // Clear DISCORD_TOKEN
+    const env = { ...process.env };
+    delete env.DISCORD_TOKEN;
+
+    const result = spawnSync('node', ['src/index.js'], { env, encoding: 'utf-8' });
+    expect(result.status).toBe(1);
+    expect(result.stderr || result.stdout).toMatch(/DISCORD_TOKEN is missing/);
+  });
+});

tsconfig.json

@@ -0,0 +1,37 @@
+{
+  "compilerOptions": {
+    /* Base Options: */
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "target": "ES2022",
+    "allowJs": true,
+    "resolveJsonModule": true,
+    "moduleDetection": "force",
+    "isolatedModules": true,
+    /* Strictness */
+    "strict": true,
+    "noUncheckedIndexedAccess": true,
+    "checkJs": true,
+    /* If NOT transpiling with TypeScript: */
+    "module": "NodeNext",
+    "noEmit": true,
+    /* If your code runs in the DOM: */
+    // "lib": ["es2022", "dom", "dom.iterable"],
+    /* If your code doesn't run in the DOM: */
+    "lib": ["ES2022"],
+
+    /* If transpiling with TypeScript: */
+    "module": "CommonJS", // Use CommonJS for Node.js compatibility
+    "outDir": "dist",     // Output compiled JS to dist/
+    "sourceMap": true,    // Generate source maps
+
+    /* Project Structure */
+    // "rootDir": "src", // Remove rootDir as include covers files outside src
+    "baseUrl": ".", // Allows for path aliases if needed
+    "paths": {
+      "@/*": ["src/*"] // Example path alias - keep if used, adjust if needed
+    }
+  },
+  "include": ["src/**/*.ts", "deploy-commands.ts", "tests/**/*.ts"], // Include source, deploy script, and tests
+  "exclude": ["node_modules", "dist"] // Exclude build output and dependencies
+}

update-plugin.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+# Exit immediately if a command exits with a non-zero status.
+set -e
+
+# Define variables
+PLUGIN_DIR="./plugins"
+REPO_URL="https://maven.lavalink.dev/snapshots/dev/lavalink/youtube/youtube-plugin"
+METADATA_URL="${REPO_URL}/maven-metadata.xml"
+ARTIFACT_ID="youtube-plugin"
+
+echo "Fetching latest snapshot version..."
+
+# Fetch metadata and extract the latest snapshot version using grep and sed
+# Use curl with -sS for silent operation but show errors
+# Use grep to find the <latest> tag, then sed to extract the content
+LATEST_VERSION=$(curl -sS "$METADATA_URL" | grep '<latest>' | sed -e 's/.*<latest>\(.*\)<\/latest>.*/\1/')
+
+if [ -z "$LATEST_VERSION" ]; then
+  echo "Error: Could not determine the latest snapshot version."
+  exit 1
+fi
+
+echo "Latest snapshot version: $LATEST_VERSION"
+
+# Construct the JAR filename and download URL
+JAR_FILENAME="${ARTIFACT_ID}-${LATEST_VERSION}.jar"
+DOWNLOAD_URL="${REPO_URL}/${LATEST_VERSION}/${JAR_FILENAME}"
+
+# Create the plugins directory if it doesn't exist
+mkdir -p "$PLUGIN_DIR"
+
+# Remove any existing youtube-plugin JARs to avoid conflicts
+echo "Removing old plugin versions from $PLUGIN_DIR..."
+rm -f "$PLUGIN_DIR"/youtube-plugin-*.jar
+
+# Download the latest snapshot JAR
+echo "Downloading $JAR_FILENAME from $DOWNLOAD_URL..."
+curl -L -o "$PLUGIN_DIR/$JAR_FILENAME" "$DOWNLOAD_URL"
+
+# Verify download
+if [ ! -f "$PLUGIN_DIR/$JAR_FILENAME" ]; then
+    echo "Error: Failed to download the plugin JAR."
+    exit 1
+fi
+
+echo "Successfully downloaded $JAR_FILENAME to $PLUGIN_DIR"
+echo "Make sure to restart your Lavalink container for the changes to take effect."
+
+exit 0