/**
 * Userbot (selfbot) entry — runs the assistant on a single USER account token,
 * which is the only kind of account Discord lets Go Live (screen-share).
 *
 * Voice goes through @discordjs/voice (>=0.19 + @snazzah/davey for Discord's
 * DAVE E2EE) using the selfbot client's `voiceAdapterCreator`. The selfbot
 * library's OWN native voice connection does NOT complete the current
 * (DAVE/v8) handshake and times out, so we deliberately reuse the normal-bot
 * VoiceSession (receive -> Whisper -> reply -> TTS playback) instead, just with
 * a user-account channel.
 *
 * Stage 1 (this module): log in, join (auto from DISCORD_VOICE_CHANNEL_ID or via
 * "!자비스 join"), converse by voice. Go-Live broadcast + broadcast-coupled
 * search routing land in stage 2.
 *
 * ToS WARNING: automating a user account ("selfbot") violates Discord's ToS and
 * can get the account banned. Use a throwaway/burner account only.
 */
import type { VoiceBasedChannel } from "discord.js";
import { config } from "./config.ts";
import { joinChannel, leaveGuild } from "./voice.ts";

type AnyClient = any;

async function loadSelfbot(): Promise<any> {
  try {
    return await import("discord.js-selfbot-v13");
  } catch (e) {
    throw new Error(
      "유저봇 의존성이 없습니다. 설치: bun add discord.js-selfbot-v13\n" +
        `원본 오류: ${(e as Error).message}`,
    );
  }
}

async function joinAndListen(client: AnyClient, channelId: string): Promise<void> {
  const channel: any = await client.channels.fetch(channelId).catch(() => null);
  if (!channel || channel.isVoice?.() === false) {
    console.error(`[userbot] voice channel ${channelId} not found / not a voice channel`);
    return;
  }
  // The selfbot VoiceChannel is runtime-compatible with @discordjs/voice's
  // joinVoiceChannel (it exposes id, guild.id and guild.voiceAdapterCreator).
  const session = await joinChannel(channel as unknown as VoiceBasedChannel);
  session.onTurn = ({ transcript, reply }) => console.log(`🗣️  ${transcript}\n🤖 ${reply}`);
  console.log(`🎙️  유저봇이 '${channel.name}' 음성채널에 참여했습니다.`);
}

export async function runUserbot(): Promise<void> {
  if (!config.selfbotToken) {
    throw new Error("DISCORD_SELFBOT_TOKEN이 설정되지 않았습니다 (.env). 버너 계정 토큰을 넣어주세요.");
  }
  const selfbot = await loadSelfbot();
  const client = new selfbot.Client();

  client.on("ready", async () => {
    console.log(`✓ 유저봇 로그인: ${client.user?.tag}`);
    if (config.autoJoinChannelId) {
      await joinAndListen(client, config.autoJoinChannelId).catch((e) =>
        console.error("[userbot] auto-join failed:", e),
      );
    } else {
      console.log('[userbot] DISCORD_VOICE_CHANNEL_ID 미설정 — "!자비스 join" 명령을 기다립니다.');
    }
  });

  // Text-command control (userbots cannot use slash commands): join the
  // caller's current voice channel, or leave.
  client.on("messageCreate", async (msg: any) => {
    const content = (msg.content || "").trim();
    if (content === "!자비스 join" || content === "!jarvis join") {
      const ch = msg.member?.voice?.channel || msg.author?.voice?.channel;
      if (ch) await joinAndListen(client, ch.id).catch((e) => console.error("[userbot] join cmd:", e));
    } else if (content === "!자비스 leave" || content === "!jarvis leave") {
      leaveGuild(config.guildId);
    }
  });

  await client.login(config.selfbotToken);
}