import os

# =========================
# SIMPLE ENV AUTH LOADER
# =========================

def load_env_var(key: str, default=None):
    """
    Safe environment variable loader.
    Works without python-dotenv dependency.
    """
    return os.environ.get(key, default)


def get_token(platform: str):
    """
    Returns stored token for platform.
    No external dependency version.
    """

    key_map = {
        "tiktok": "TIKTOK_TOKEN",
        "youtube": "YOUTUBE_TOKEN",
        "facebook": "FACEBOOK_TOKEN",
        "reels": "META_TOKEN",
    }

    env_key = key_map.get(platform)

    if not env_key:
        raise ValueError(f"Unsupported platform: {platform}")

    token = load_env_var(env_key)

    if not token:
        raise ValueError(f"Missing token for {platform} ({env_key})")

    return token