# PATH: bot/client.py
from logging import getLogger
from hydrogram import Client
from bot.config import Telegram

logger = getLogger("bot")

def create_clients() -> tuple[Client, Client | None]:
    base_args = dict(
        api_id=Telegram.API_ID,
        api_hash=Telegram.API_HASH,
        in_memory=True,
        sleep_threshold=30,
        max_concurrent_transmissions=10,
    )

    # ✅ Prefer BOT session string (SESSION_STRING) to avoid DC2 auth-key creation on HF
    if Telegram.SESSION_STRING:
        logger.info("✅ Bot client using SESSION_STRING (pre-generated)")
        bot = Client("bot_session", session_string=Telegram.SESSION_STRING, **base_args)
    elif Telegram.BOT_TOKEN:
        logger.warning("⚠️ Bot client using BOT_TOKEN (may create auth-key on a DC). Prefer SESSION_STRING.")
        bot = Client("bot_session", bot_token=Telegram.BOT_TOKEN, **base_args)
    else:
        raise RuntimeError("Missing SESSION_STRING and BOT_TOKEN.")

    # ✅ Worker user client ALWAYS uses USER_SESSION_STRING (phone account)
    user = None
    if Telegram.USER_SESSION_STRING:
        logger.info("✅ Worker (Downloader) client using USER_SESSION_STRING")
        user = Client(
            "downloader_session",
            session_string=Telegram.USER_SESSION_STRING,
            no_updates=True,
            **base_args,
        )
    else:
        logger.warning("⚠️ No USER_SESSION_STRING. Restricted link download disabled.")

    return bot, user