jukebox-vibe/server/src/index.ts

import path from 'node:path';
import fs from 'node:fs';
import { fileURLToPath } from 'node:url';
import express, { Request, Response } from 'express';
import cors from 'cors';
import { Client, GatewayIntentBits, Partials, ChannelType, Events, type Message } from 'discord.js';
import {
  joinVoiceChannel,
  createAudioPlayer,
  createAudioResource,
  AudioPlayerStatus,
  NoSubscriberBehavior,
  getVoiceConnection,
  type VoiceConnection,
  generateDependencyReport
} from '@discordjs/voice';
import sodium from 'libsodium-wrappers';
import nacl from 'tweetnacl';

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

// --- Config ---
const PORT = Number(process.env.PORT ?? 8080);
const SOUNDS_DIR = process.env.SOUNDS_DIR ?? '/data/sounds';
const DISCORD_TOKEN = process.env.DISCORD_TOKEN ?? '';
const ALLOWED_GUILD_IDS = (process.env.ALLOWED_GUILD_IDS ?? '')
  .split(',')
  .map((s) => s.trim())
  .filter(Boolean);

if (!DISCORD_TOKEN) {
  console.error('Fehlende Umgebungsvariable DISCORD_TOKEN');
  process.exit(1);
}

fs.mkdirSync(SOUNDS_DIR, { recursive: true });

// --- Voice Abhängigkeiten prüfen ---
await sodium.ready;
// init nacl to ensure it loads
void nacl.randomBytes(1);
console.log(generateDependencyReport());

// --- Discord Client ---
const client = new Client({
  // 32385 = Guilds + GuildVoiceStates + GuildMessages + GuildMessageReactions + GuildMessageTyping
  //        + DirectMessages + DirectMessageReactions + DirectMessageTyping
  // (ohne privilegierte Intents wie MessageContent/GuildMembers/Presences)
  intents: 32385,
  partials: [Partials.Channel]
});

type GuildAudioState = { connection: VoiceConnection; player: ReturnType<typeof createAudioPlayer> };
const guildAudioState = new Map<string, GuildAudioState>();

client.once(Events.ClientReady, () => {
  console.log(`Bot eingeloggt als ${client.user?.tag}`);
});

client.on(Events.MessageCreate, async (message: Message) => {
  try {
    if (message.author?.bot) return;
    if (!message.channel?.isDMBased?.()) return;
    if (message.attachments.size === 0) return;

    for (const [, attachment] of message.attachments) {
      const name = attachment.name ?? 'upload.mp3';
      const lower = name.toLowerCase();
      if (!lower.endsWith('.mp3')) continue;

      const safeName = name.replace(/[^a-zA-Z0-9_.-]/g, '_');
      let targetPath = path.join(SOUNDS_DIR, safeName);
      if (fs.existsSync(targetPath)) {
        const base = path.parse(safeName).name;
        const ext = path.parse(safeName).ext || '.mp3';
        let i = 2;
        while (fs.existsSync(targetPath)) {
          targetPath = path.join(SOUNDS_DIR, `${base}-${i}${ext}`);
          i += 1;
        }
      }

      const res = await fetch(attachment.url);
      if (!res.ok) throw new Error(`Download fehlgeschlagen: ${attachment.url}`);
      const arrayBuffer = await res.arrayBuffer();
      fs.writeFileSync(targetPath, Buffer.from(arrayBuffer));
      await message.reply(`Sound gespeichert: ${path.basename(targetPath)}`);
    }
  } catch (err) {
    console.error('Fehler bei DM-Upload:', err);
  }
});

await client.login(DISCORD_TOKEN);

// --- Express App ---
const app = express();
app.use(express.json());
app.use(cors());

app.get('/api/health', (_req: Request, res: Response) => {
  res.json({ ok: true });
});

app.get('/api/sounds', (req: Request, res: Response) => {
  const q = String(req.query.q ?? '').toLowerCase();
  const files = fs
    .readdirSync(SOUNDS_DIR, { withFileTypes: true })
    .filter((d) => d.isFile() && d.name.toLowerCase().endsWith('.mp3'))
    .map((d) => d.name)
    .sort((a, b) => a.localeCompare(b));

  const items = files
    .map((file) => ({ fileName: file, name: path.parse(file).name }))
    .filter((s) => (q ? s.name.toLowerCase().includes(q) : true));

  res.json(items);
});

app.get('/api/channels', (_req: Request, res: Response) => {
  if (!client.isReady()) return res.status(503).json({ error: 'Bot noch nicht bereit' });

  const allowed = new Set(ALLOWED_GUILD_IDS);
  const result: Array<{ guildId: string; guildName: string; channelId: string; channelName: string }> = [];
  for (const [, guild] of client.guilds.cache) {
    if (allowed.size > 0 && !allowed.has(guild.id)) continue;
    const channels = guild.channels.cache;
    for (const [, ch] of channels) {
      if (ch?.type === ChannelType.GuildVoice || ch?.type === ChannelType.GuildStageVoice) {
        result.push({ guildId: guild.id, guildName: guild.name, channelId: ch.id, channelName: ch.name });
      }
    }
  }
  result.sort((a, b) => a.guildName.localeCompare(b.guildName) || a.channelName.localeCompare(b.channelName));
  res.json(result);
});

app.post('/api/play', async (req: Request, res: Response) => {
  try {
    const { soundName, guildId, channelId } = req.body as {
      soundName?: string;
      guildId?: string;
      channelId?: string;
    };
    if (!soundName || !guildId || !channelId) return res.status(400).json({ error: 'soundName, guildId, channelId erforderlich' });

    const filePath = path.join(SOUNDS_DIR, `${soundName}.mp3`);
    if (!fs.existsSync(filePath)) return res.status(404).json({ error: 'Sound nicht gefunden' });

    const guild = client.guilds.cache.get(guildId);
    if (!guild) return res.status(404).json({ error: 'Guild nicht gefunden' });
    const channel = guild.channels.cache.get(channelId);
    if (!channel || (channel.type !== ChannelType.GuildVoice && channel.type !== ChannelType.GuildStageVoice)) {
      return res.status(400).json({ error: 'Ungültiger Voice-Channel' });
    }

    let state = guildAudioState.get(guildId);
    if (!state) {
      const connection = joinVoiceChannel({
        channelId,
        guildId,
        adapterCreator: guild.voiceAdapterCreator as any
      });
      const player = createAudioPlayer({ behaviors: { noSubscriber: NoSubscriberBehavior.Play } });
      connection.subscribe(player);
      state = { connection, player };
      guildAudioState.set(guildId, state);

      state.player.on(AudioPlayerStatus.Idle, () => {
        // optional: Verbindung bestehen lassen oder nach Timeout trennen
      });
    } else {
      // Wechsel in anderen Channel, wenn nötig
      const current = getVoiceConnection(guildId);
      if (current && (current.joinConfig.channelId !== channelId)) {
        current.destroy();
        const connection = joinVoiceChannel({
          channelId,
          guildId,
          adapterCreator: guild.voiceAdapterCreator as any
        });
        const player = createAudioPlayer({ behaviors: { noSubscriber: NoSubscriberBehavior.Play } });
        connection.subscribe(player);
        state = { connection, player };
        guildAudioState.set(guildId, state);
      }
    }

    const resource = createAudioResource(filePath);
    state.player.stop();
    state.player.play(resource);
    return res.json({ ok: true });
  } catch (err: any) {
    console.error('Play-Fehler:', err);
    return res.status(500).json({ error: err?.message ?? 'Unbekannter Fehler' });
  }
});

// Static Frontend ausliefern (Vite build)
const webDistPath = path.resolve(__dirname, '../../web/dist');
if (fs.existsSync(webDistPath)) {
  app.use(express.static(webDistPath));
  app.get('*', (_req, res) => {
    res.sendFile(path.join(webDistPath, 'index.html'));
  });
}

app.listen(PORT, () => {
  console.log(`Server läuft auf http://0.0.0.0:${PORT}`);
});