from __future__ import annotations

AVATAR_BASE_URL = "https://minio.nomadro.cn/hackrobot/nomadcna/avatars"
AVATAR_URLS = [f"{AVATAR_BASE_URL}/avatar-{index:02d}.jpg" for index in range(1, 33)]


def avatar_for_index(index: int) -> str:
    return AVATAR_URLS[abs(int(index)) % len(AVATAR_URLS)]


def avatar_for_name(name: str) -> str:
    seed = sum(ord(char) for char in (name or "NomadCNA"))
    return avatar_for_index(seed)