import NextAuth from 'next-auth';
import { PrismaAdapter } from '@auth/prisma-adapter';
import Google from 'next-auth/providers/google';
import GitHub from 'next-auth/providers/github';
import Credentials from 'next-auth/providers/credentials';
import { db } from '@/lib/db';

export const { handlers, signIn, signOut, auth } = NextAuth({
  adapter: PrismaAdapter(db),
  providers: [
    // Google OAuth - uncomment and add credentials when ready
    // Google({
    //   clientId: process.env.GOOGLE_CLIENT_ID,
    //   clientSecret: process.env.GOOGLE_CLIENT_SECRET,
    // }),
    
    // GitHub OAuth - uncomment and add credentials when ready  
    // GitHub({
    //   clientId: process.env.GITHUB_ID,
    //   clientSecret: process.env.GITHUB_SECRET,
    // }),
    
    // Email/Password - for development, add proper provider in production
    Credentials({
      name: 'credentials',
      credentials: {
        email: { label: 'Email', type: 'email' },
        password: { label: 'Password', type: 'password' },
      },
      async authorize(credentials) {
        // TODO: Implement proper credential validation
        // This is a placeholder for development
        if (!credentials?.email) {
          return null;
        }
        
        // In production, verify password hash here
        const user = await db.user.findUnique({
          where: { email: credentials.email as string },
        });
        
        return user;
      },
    }),
  ],
  session: {
    strategy: 'jwt',
  },
  pages: {
    signIn: '/login',
    // signUp: '/register',
    // error: '/auth/error',
  },
  callbacks: {
    async session({ session, token }) {
      if (token.sub && session.user) {
        session.user.id = token.sub;
      }
      return session;
    },
    async jwt({ token, user }) {
      if (user) {
        token.sub = user.id;
      }
      return token;
    },
  },
});