app/config.py

import os
from dataclasses import dataclass

@dataclass(frozen=True)
class Config:
    # Telegram
    BOT_TOKEN: str
    API_ID: int
    API_HASH: str
    OWNER_ID: int

    # Workers
    WORKER1_URL: str
    WORKER2_URL: str
    BOT_BACKEND_KEY: str
    HF_API_KEY: str

    # Optional
    BOT_USERNAME: str = ""

def _must(name: str) -> str:
    v = os.getenv(name, "").strip()
    if not v:
        raise RuntimeError(f"Missing env: {name}")
    return v

def load_config() -> Config:
    return Config(
        BOT_TOKEN=_must("BOT_TOKEN"),
        API_ID=int(_must("API_ID")),
        API_HASH=_must("API_HASH"),
        OWNER_ID=int(_must("OWNER_ID")),
        WORKER1_URL=_must("WORKER1_URL").rstrip("/"),
        WORKER2_URL=_must("WORKER2_URL").rstrip("/"),
        BOT_BACKEND_KEY=_must("BOT_BACKEND_KEY"),
        HF_API_KEY=_must("HF_API_KEY"),
        BOT_USERNAME=os.getenv("BOT_USERNAME", "").strip(),
    )