export const AVATAR_BASE_URL = "https://minio.nomadro.cn/hackrobot/nomadcna/avatars";

export const AVATAR_URLS = Array.from(
  { length: 32 },
  (_, index) => `${AVATAR_BASE_URL}/avatar-${String(index + 1).padStart(2, "0")}.jpg`
);

export function avatarForIndex(index: number): string {
  const safeIndex = Number.isFinite(index) ? Math.abs(Math.trunc(index)) : 0;
  return AVATAR_URLS[safeIndex % AVATAR_URLS.length];
}

export function avatarForName(name: string): string {
  const seed = Array.from(name || "NomadCNA").reduce((sum, char) => sum + char.charCodeAt(0), 0);
  return avatarForIndex(seed);
}