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

export const { handlers, signIn, signOut, auth } = NextAuth({
  providers: [
    CredentialsProvider({
      name: "Credentials",
      credentials: {
        username: { label: "Username", type: "text" },
        password: { label: "Password", type: "password" }
      },
      async authorize(credentials) {
        if (!credentials?.username || !credentials?.password) return null;

        const user = await prisma.staff.findUnique({
          where: { username: credentials.username as string }
        });

        if (!user || !user.passwordHash || !user.isActive) return null;

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

        if (!isValid) return null;

        return {
          id: user.id.toString(),
          name: user.fullName || user.username,
          role: user.role,
          avatarUrl: user.avatarUrl,
        };
      }
    })
  ],
  pages: {
    signIn: "/login",
  },
  callbacks: {
    async jwt({ token, user }) {
      if (user) {
        token.role = (user as any).role;
        token.sub = user.id;
        token.avatarUrl = (user as any).avatarUrl;
      }
      return token;
    },
    async session({ session, token }) {
      if (session.user) {
        (session.user as any).role = token.role;
        session.user.id = token.sub as string;
        (session.user as any).avatarUrl = token.avatarUrl;
      }
      return session;
    }
  }
});