auth.ts

import { FirestoreAdapter } from "@auth/firebase-adapter";
import { NextAuthOptions } from "next-auth";
import GoogleProvider from "next-auth/providers/google"
import { adminAuth, adminDb } from "./firebase-admin";
import type { Adapter } from "next-auth/adapters"; 

export const authOptions: NextAuthOptions ={
    providers: [
        GoogleProvider({
            clientId: process.env.GOOGLE_CLIENT_ID!,
            clientSecret: process.env.GOOGLE_CLIENT_SECRET!,
        }),
        
    ],
    callbacks: {
        session: async({session, token})=>{
            if(session?.user){
                if(token.sub){
                    session.user.id=token.sub;
                    const firebaseToken=await adminAuth.createCustomToken(token.sub);
                    session.firebaseToken=firebaseToken;
                }
            }
            return session;
        },
        jwt: async ({user, token})=>{
            if(user){
                token.sub=user.id;
            }
            return token;
        },
    },
    session:{
        strategy: 'jwt',
    },
    adapter: FirestoreAdapter(adminDb) as Adapter,
    

} satisfies NextAuthOptions;