// lib/auth-options.ts
import type { NextAuthOptions } from 'next-auth';
import CredentialsProvider from 'next-auth/providers/credentials';
import { prisma } from './prisma';
import { compare } from 'bcryptjs';

export const authOptions: NextAuthOptions = {
  providers: [
    CredentialsProvider({
      name: 'Credentials',
      credentials: {
        email: {
          label: 'Benutzername oder E-Mail',
          type: 'text',
        },
        password: {
          label: 'Passwort',
          type: 'password',
        },
      },
      async authorize(credentials) {
        if (!credentials?.email || !credentials.password) {
          return null;
        }

        const identifier = credentials.email.trim();

        // User per E-Mail ODER Benutzername suchen
        const user = await prisma.user.findFirst({
          where: {
            OR: [{ email: identifier }, { username: identifier }],
          },
        });

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

        const isValid = await compare(credentials.password, user.passwordHash);
        if (!isValid) {
          return null;
        }

        return {
          id: user.id,
          name: user.name ?? user.username ?? user.email,
          email: user.email,
        };
      },
    }),
  ],
  pages: {
    signIn: '/login',
  },
  session: {
    strategy: 'jwt',
  },
  callbacks: {
    async jwt({ token, user }) {
      if (user) {
        token.id = user.id;
      }
      return token;
    },
    async session({ session, token }) {
      if (session.user && token.id) {
        (session.user as any).id = token.id;
      }
      return session;
    },
  },
};