# lib/auth.ts:

import type { Session, User } from "lucia";
import { Discord } from "arctic";
import { Lucia } from "lucia";
import { PrismaAdapter } from "@lucia-auth/adapter-prisma";
import { cache } from "react";
import { client } from "@/lib/db";
import { cookies } from "next/headers";
import { env } from "@/env";

const adapter = new PrismaAdapter(client.session, client.user);

export const lucia = new Lucia(adapter, {
  sessionCookie: {
    expires: false,
    attributes: {
      secure: process.env.NODE_ENV === "production" // eslint-disable-line no-process-env
    },
    getUserAttributes: attributes => {
      console.log(attributes);

      return {
        id: attributes.id
      };
    }
  }
});

export const discord = new Discord(
  env.DISCORD_CLIENT_ID,
  env.DISCORD_CLIENT_SECRET,
  "http://localhost:3000/login/callback"
);

export const validateRequest = cache(
  async (): Promise<{ user: User; session: Session } | { user: null; session: null }> => {
    const sessionId = cookies().get(lucia.sessionCookieName)?.value ?? null;
    if (!sessionId) {
      return {
        user: null,
        session: null
      };
    }

    const result = await lucia.validateSession(sessionId);

    try {
      if (result.session && result.session.fresh) {
        const sessionCookie = lucia.createSessionCookie(result.session.id);
        cookies().set(sessionCookie.name, sessionCookie.value, sessionCookie.attributes);
      }
      if (!result.session) {
        const sessionCookie = lucia.createBlankSessionCookie();
        cookies().set(sessionCookie.name, sessionCookie.value, sessionCookie.attributes);
      }
    } catch {}

    return result;
  }
);

declare module "lucia" {
    interface Register {
        Lucia: typeof lucia;
        DatabaseUserAttributes: DatabaseUserAttributes;
    }
}

interface DatabaseUserAttributes {
    id: string;
}

You're importing a component that needs next/headers. That only works in a Server Component which is not supported in the pages/ directory