auth.ts

import NextAuth, { Account, User } from 'next-auth';
import authConfig from './auth.config';
import { db } from './db';

export const {
  handlers: { GET, POST },
  auth,
  signIn,
  signOut,
} = NextAuth({
  ...authConfig,
  callbacks: {
    async signIn({ user, account }: { user: any; account: Account | null }) {
      if (account?.provider === 'google') {
        try {
          const { name, email, image } = await user;
          const userExists = await db.user.findUnique({
            where: { email },
            select: {
              id: true,
            },
          });

          if (!userExists) {
            const res = await fetch(
              `${process.env.NEXT_PUBLIC_APP_DOMAIN}/api/user`,
              {
                method: 'POST',
                headers: {
                  'Content-Type': 'application/json',
                },
                body: JSON.stringify({
                  name,
                  email,
                  image,
                  username: name.split(' ').join('').toLowerCase(),
                }),
              }
            );
            if (!res.ok) {
              throw new Error('Failed to create user');
            }
          }
          console.log('userExists', userExists);
          return true;
        } catch (err) {
          console.error(err);
          return false;
        }
      }
      if (account?.provider === 'github') {
        try {
          console.log('user from github', user);
          const { name, email, image } = await user;
          const userExists = await db.user.findUnique({
            where: { email },
          });
          if (!userExists) {
            const res = await fetch(
              `${process.env.NEXT_PUBLIC_APP_DOMAIN}/api/user`,
              {
                method: 'POST',
                headers: {
                  'Content-Type': 'application/json',
                },
                body: JSON.stringify({
                  name,
                  email,
                  image,
                }),
              }
            );
            if (!res.ok) {
              throw new Error('Failed to create user');
            }
          }
          return true;
        } catch (err) {
          console.error(err);
          return false;
        }
      }
      return user;
    },
  },
});