"""Load configuration from environment. Fail fast if BOT_TOKEN is missing."""
import os
from pathlib import Path

from dotenv import load_dotenv

load_dotenv()

BOT_TOKEN = os.getenv("BOT_TOKEN")
if not BOT_TOKEN:
    raise SystemExit("BOT_TOKEN is not set. Copy .env.example to .env and set your token from @BotFather.")

DATABASE_URL = os.getenv("DATABASE_URL", "sqlite:///data/duty_teller.db")
MINI_APP_BASE_URL = os.getenv("MINI_APP_BASE_URL", "").rstrip("/")
HTTP_PORT = int(os.getenv("HTTP_PORT", "8080"))
DATA_DIR = Path(__file__).resolve().parent / "data"

# Miniapp access: comma-separated Telegram usernames (no @). Empty = no one allowed.
_raw_allowed = os.getenv("ALLOWED_USERNAMES", "").strip()
ALLOWED_USERNAMES = {s.strip().lstrip("@").lower() for s in _raw_allowed.split(",") if s.strip()}

_raw_admin = os.getenv("ADMIN_USERNAMES", "").strip()
ADMIN_USERNAMES = {s.strip().lstrip("@").lower() for s in _raw_admin.split(",") if s.strip()}


def is_admin(username: str) -> bool:
    """True if the given Telegram username (no @, any case) is in ADMIN_USERNAMES."""
    return (username or "").strip().lower() in ADMIN_USERNAMES


def can_access_miniapp(username: str) -> bool:
    """True if username is in ALLOWED_USERNAMES or ADMIN_USERNAMES."""
    u = (username or "").strip().lower()
    return u in ALLOWED_USERNAMES or u in ADMIN_USERNAMES