route.ts

import NextAuth from 'next-auth/next';
import GoogleProvider from 'next-auth/providers/google';

const useSecureCookies = !!process.env.VERCEL_URL;

const handler = NextAuth({
  providers: [
    GoogleProvider({
      clientId: process.env.GOOGLE_CLIENT_ID ?? '',
      clientSecret: process.env.GOOGLE_CLIENT_SECRET ?? '',
    }),
  ],
  secret: process.env.NEXTAUTH_SECRET,
  cookies: {
    sessionToken: {
      name: `${useSecureCookies ? '__Secure-' : ''}next-auth.session-token`,
      options: {
        httpOnly: true,
        sameSite: 'lax',
        path: '/',
        domain: `.${process.env.BASE_DOMAIN}`,
        secure: useSecureCookies,
      },
    },
  },
});

export { handler as GET, handler as POST };