auth.ts

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

import { prisma } from "@/lib/prisma";
import authConfig from "./auth.config";

export const {
  handlers: { GET, POST },
  auth,
  signIn,
  signOut,
} = NextAuth({
  adapter: PrismaAdapter(prisma),

  ...authConfig,

  providers: [
    ...authConfig.providers,

    Credentials({
      name: "Credentials",

      credentials: {
        email: {},
        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,
              password: true,
            },
          });

        if (!user || !user.password) {
          return null;
        }

        const isPasswordValid =
          await bcrypt.compare(
            credentials.password as string,
            user.password,
          );

        if (!isPasswordValid) {
          return null;
        }

        return {
          id: user.id,
          email: user.email,
          name: user.name,
        };
      },
    }),
  ],
});