import httpx


class WebDAVError(Exception):
    pass


async def download_file(base_url: str, user: str, password: str, file_path: str, *, timeout: float = 60.0) -> bytes:
    """Fetch a file from Nextcloud WebDAV. Returns the raw bytes."""
    base = base_url.rstrip("/")
    rel = file_path.lstrip("/")
    url = f"{base}/{rel}"

    async with httpx.AsyncClient(auth=(user, password), timeout=timeout) as client:
        response = await client.get(url)

    if response.status_code != 200:
        raise WebDAVError(
            f"WebDAV GET {file_path} failed: status={response.status_code}"
        )
    return response.content