import type { NextAuthOptions } from "next-auth";
import CredentialsProvider from "next-auth/providers/credentials";
import bcrypt from "bcryptjs";
import { prisma } from "@/lib/prisma";

export const authOptions: NextAuthOptions = {
  trustHost: true,
  session: { strategy: "jwt", maxAge: 60 * 60 * 24 * 14 },
  pages: { signIn: "/login" },
  providers: [
    CredentialsProvider({
      name: "E-Mail",
      credentials: {
        email: { label: "E-Mail", type: "email" },
        password: { label: "Passwort", type: "password" },
      },
      async authorize(credentials) {
        const email = credentials?.email?.trim().toLowerCase();
        const password = credentials?.password;
        if (!email || !password) return null;

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

        const ok = await bcrypt.compare(password, user.passwordHash);
        if (!ok) 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 (session.user) {
        session.user.id = token.id as string;
        session.user.role = (token.role as string) ?? "LEARNER";
      }
      return session;
    },
  },
  secret: process.env.NEXTAUTH_SECRET,
};