import { createAuthClient } from "better-auth/react";
import { twoFactorClient } from "better-auth/client/plugins";
import { passkeyClient } from "@better-auth/passkey/client";

const OTP_STEP_STORAGE_KEY = "hellthhub_login_step_otp";
const OTP_STEP_TTL_MS = 5 * 60 * 1000;

function setOtpStepActive() {
  if (typeof window === "undefined") return;
  try {
    window.localStorage.setItem(
      OTP_STEP_STORAGE_KEY,
      JSON.stringify({ expiresAt: Date.now() + OTP_STEP_TTL_MS }),
    );
  } catch {
    // ignore storage access issues
  }
}

export function resolveApiBaseUrl() {
  const configured = process.env.NEXT_PUBLIC_API_URL;
  if (configured) return configured;

  if (process.env.NODE_ENV === "production") {
    throw new Error("NEXT_PUBLIC_API_URL muss in Produktion gesetzt sein");
  }

  if (typeof window !== "undefined") {
    const host = window.location.hostname;
    if (host.includes("::1")) {
      return "http://127.0.0.1:3002";
    }
  }

  return "http://localhost:3002";
}

export const authClient = createAuthClient({
  baseURL: resolveApiBaseUrl(),
  plugins: [
    twoFactorClient({
      onTwoFactorRedirect: async () => {
        setOtpStepActive();
        if (typeof window !== "undefined" && window.location.pathname !== "/login/otp") {
          window.location.assign("/login/otp");
        }
      },
    }),
    passkeyClient(),
  ],
});

export const { signIn, signOut, signUp, useSession } = authClient;