import { type NextRequest } from 'next/server';
import { randomBytes } from 'node:crypto';
import { requireAdminApi } from '@/lib/auth/admin-guard';
import { getSupabaseAdmin } from '@/lib/supabase/admin';
import { logAdminAction } from '@/lib/auth/audit';
import { isUuid } from '@/lib/admin/validators';
import { jsonNoStore } from '@/lib/admin/response';

export const runtime = 'nodejs';
export const dynamic = 'force-dynamic';

export async function POST(
  _req: NextRequest,
  { params }: { params: { id: string } },
) {
  const auth = await requireAdminApi();
  if (!auth.ok) return auth.response;

  const { id } = params;
  if (!isUuid(id)) {
    return jsonNoStore({ error: 'invalid tunnel id' }, { status: 400 });
  }

  const token = randomBytes(32).toString('hex');

  const admin = getSupabaseAdmin();
  const { data, error } = await admin
    .from('tunnels')
    .update({ token })
    .eq('user_id', id)
    .select('subdomain, token')
    .maybeSingle<{ subdomain: string; token: string }>();
  if (error) {
    console.error('admin tunnel.regenerate_token failed', error);
    return jsonNoStore({ error: 'internal error' }, { status: 500 });
  }
  if (!data) {
    return jsonNoStore({ error: 'tunnel not found' }, { status: 404 });
  }

  await logAdminAction(auth.user, {
    action: 'tunnel.regenerate_token',
    target_type: 'tunnel',
    target_id: id,
    details: { subdomain: data.subdomain },
  });

  return jsonNoStore({ ok: true, token: data.token });
}