const readEnvString = (value: unknown): string | undefined =>
  typeof value === "string" && value.trim().length > 0
    ? value.trim()
    : undefined;

export const CHATKIT_API_URL =
  readEnvString(import.meta.env.VITE_CHATKIT_API_URL) ?? "/chatkit";

export const API_BASE_URL =
  readEnvString(import.meta.env.VITE_API_BASE_URL) ?? "";

/**
 * ChatKit requires a domain key at runtime. Use the local fallback while
 * developing, and register a production domain key for deployment:
 * https://platform.openai.com/settings/organization/security/domain-allowlist
 */
export const CHATKIT_API_DOMAIN_KEY =
  readEnvString(import.meta.env.VITE_CHATKIT_API_DOMAIN_KEY) ??
  "domain_pk_localhost_dev";

export const GOOGLE_AUTH_URL = `${API_BASE_URL}/auth/start`;
export const AUTH_STATUS_URL = `${API_BASE_URL}/auth/status`;