auth.ts

import NextAuth from "next-auth";
import Credentials from "next-auth/providers/credentials";
import { PrismaAdapter } from "@auth/prisma-adapter";
import { prisma } from "@/lib/db";
import bcrypt from "bcryptjs";

export const { handlers, auth, signIn, signOut } = NextAuth({
  adapter: PrismaAdapter(prisma),
  session: { strategy: "jwt" },
  pages: {
    signIn: "/sign-in",
    error: "/sign-in",
  },
  providers: [
    Credentials({
      credentials: {
        email: { label: "Email", type: "email" },
        password: { label: "Password", type: "password" },
      },
      async authorize(credentials) {
        if (!credentials?.email || !credentials?.password) return null;

        const user = await prisma.user.findUnique({
          where: { email: credentials.email as string },
          select: { id: true, email: true, name: true, role: true, passwordHash: true },
        });

        if (!user?.passwordHash) return null;

        const valid = await bcrypt.compare(credentials.password as string, user.passwordHash);
        if (!valid) return null;

        return { id: user.id, email: user.email, name: user.name, role: user.role };
      },
    }),
  ],
  callbacks: {
    jwt({ token, user }) {
      if (user) {
        token.id = user.id;
        token.role = (user as { role?: string }).role;
      }
      return token;
    },
    session({ session, token }) {
      session.user.id = token.id as string;
      (session.user as { role?: string }).role = token.role as string;
      return session;
    },
  },
});