auth.js

import NextAuth from 'next-auth';
import CredentialsProvider from 'next-auth/providers/credentials';
import bcrypt from 'bcryptjs';
import connectMongo from '@/lib/mongodb';
import User from '@/models/User';

export const { handlers, signIn, signOut, auth } = NextAuth({
  providers: [
    CredentialsProvider({
      name: 'credentials',
      credentials: {
        email: { label: 'Email', type: 'email' },
        password: { label: 'Password', type: 'password' },
      },
      async authorize(credentials) {
        if (!credentials?.email || !credentials?.password) {
          return null;
        }

        try {
          await connectMongo();
          
          const user = await User.findOne({ email: credentials.email });
          if (!user) {
            return null;
          }

          const isPasswordValid = await bcrypt.compare(credentials.password, user.password);
          if (!isPasswordValid) {
            return null;
          }

          return {
            id: user._id.toString(),
            email: user.email,
            name: user.name,
            accountType: user.accountType,
          };
        } catch (error) {
          console.error('Auth error:', error);
          return null;
        }
      },
    }),
  ],
  session: {
    strategy: 'jwt',
  },
  secret: process.env.NEXTAUTH_SECRET,
  callbacks: {
    async jwt({ token, user }) {
      if (user) {
        token.accountType = user.accountType;
      }
      return token;
    },
    async session({ session, token }) {
      if (token) {
        session.user.id = token.sub;
        session.user.accountType = token.accountType;
      }
      return session;
    },
  },
  pages: {
    signIn: '/login',
    error: '/login',
  },
});