const isValidHttpUrl = (value: string): boolean => {
  try {
    const parsed = new URL(value);
    return parsed.protocol === "http:" || parsed.protocol === "https:";
  } catch {
    return false;
  }
};

export type SupabasePublicConfig = {
  url: string;
  anonKey: string;
};

export const readSupabasePublicConfig = (): SupabasePublicConfig | null => {
  const url = process.env.NEXT_PUBLIC_SUPABASE_URL?.trim();
  const anonKey = process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY?.trim();

  if (!url || !anonKey) {
    return null;
  }

  if (!isValidHttpUrl(url)) {
    return null;
  }

  return { url, anonKey };
};