auth.ts

import NextAuth from "next-auth"
import GitHub from "next-auth/providers/github"
import Google from "next-auth/providers/google"

import { IAccountDoc } from "./lib/database/account.model"
import { api } from "./lib/handlers/api"
import { ActionResponse } from "./types/global"
 
export const { handlers, signIn, signOut, auth } = NextAuth({
  providers: [GitHub, Google],
  callbacks: {
    async session ({ session, token }) {
      session.user.id = token.sub as string;
      return session;
    },
  async jwt({ token, account }) {
    if (account) {
      const {data: existingAccount, success}  = (await api.accounts.getByProvider(account.type === 'credentials' ? token.email! : 
        account.providerAccountId
      )) as ActionResponse<IAccountDoc>;
    if (success || !existingAccount) return token;
      const userId = existingAccount.userId;

      if (userId) token.sub = userId.toString();
    }
    return token;
  },
    async signIn({ user, profile, account}) {
      if (account?.type === "credentials") return true;
      if (!account || !user) return false;  

      const userInfo = {
        name : user.name!,
        email: user.email!,
        image: user.image!,
        username: account.provider === "github" 
        ? (profile?.login as string) 
        : (user.name?.toLowerCase() as string),
      };
      const {success} = (await api.auth.oAuthSingin({
        user: userInfo,
        provider: account.provider as 'github' | 'google',
        providerAccountId: account.providerAccountId as string,
      })) as ActionResponse
      
      if (!success ) return false;

      return true;
      },
    },
});