auth.ts

import NextAuth from "next-auth"
import { MongoDBAdapter } from "@auth/mongodb-adapter"
import Google from "next-auth/providers/google"
import client from "./lib/adpater";


// Ensure your environment variables are being read correctly
const allowedEmails = process.env.ALLOWED_EMAILS?.split(',') || [];

export const { handlers, signIn, signOut, auth } = NextAuth({
 adapter: MongoDBAdapter(client),
  providers: [Google],
  callbacks: {
    async signIn({ user, account }) {
      // Check if the user's email is in the allowed list
      if (account?.provider === "google") {
        const email = typeof user?.email === "string" ? user.email : "";
        if (allowedEmails.length > 0 && !allowedEmails.includes(email)) {
          return false; // Deny sign-in if email is not allowed
        }
        return true; // Allow sign-in
      }
      return true; // Allow sign-in for other providers
    }
  },
})