import { json, type RequestHandler } from '@sveltejs/kit';
import { getSessionUser, SESSION_COOKIE, upsertUser } from '$lib/server/auth';

export const GET: RequestHandler = async ({ cookies }) => {
  const user = getSessionUser(cookies.get(SESSION_COOKIE));
  return json({ user });
};

export const PUT: RequestHandler = async ({ cookies, request }) => {
  const user = getSessionUser(cookies.get(SESSION_COOKIE));
  if (!user) return json({ error: 'authentication required' }, { status: 401 });

  let payload: { display_name?: string };
  try {
    payload = await request.json();
  } catch {
    return json({ error: 'invalid json' }, { status: 400 });
  }

  const newName = (payload.display_name ?? '').toString().trim();
  if (newName.length > 80) {
    return json({ error: 'display_name must be ≤80 chars' }, { status: 400 });
  }

  upsertUser({
    id: user.id,
    username: user.username,
    global_name: user.global_name,
    avatar: user.avatar,
    email: user.email,
    display_name: newName || null
  } as any);

  return json({ user: { ...user, display_name: newName || null } });
};