import NextAuth from 'next-auth';
import Credentials from 'next-auth/providers/credentials';
import { prisma } from '@/lib/db/prisma';
import { verifyPassword } from '@/lib/auth/password';
import { loginSchema } from '@/lib/validations/auth';

export const { handlers, auth, signIn, signOut } = NextAuth({
  providers: [
    Credentials({
      name: 'credentials',
      credentials: {
        email:    { label: 'Email',          type: 'email' },
        password: { label: 'Palavra-passe',  type: 'password' },
      },
      async authorize(credentials) {
        const parsed = loginSchema.safeParse(credentials);
        if (!parsed.success) return null;

        const { email, password } = parsed.data;

        const user = await prisma.user.findUnique({ where: { email } });
        if (!user) return null;

        const valid = await verifyPassword(password, user.password);
        if (!valid) return null;

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

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

  pages: {
    signIn:  '/auth/login',
    error:   '/auth/login',
  },

  session: { strategy: 'jwt' },
});