import { NextResponse, type NextRequest } from 'next/server';
import { requireAdminApi } from '@/lib/auth/admin-guard';
import { getSupabaseAdmin } from '@/lib/supabase/admin';
import { logAdminAction } from '@/lib/auth/audit';
import { isUuid, parsePositiveInt } from '@/lib/admin/validators';

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

// 100 TiB ceiling — generous but guards against absurd values.
const MAX_QUOTA = 100 * 1024 ** 4;

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 NextResponse.json({ error: 'invalid tunnel id' }, { status: 400 });
  }

  let body: { quota_bytes?: unknown };
  try {
    body = (await req.json()) as { quota_bytes?: unknown };
  } catch {
    return NextResponse.json({ error: 'invalid json' }, { status: 400 });
  }
  const parsed = parsePositiveInt(body.quota_bytes, MAX_QUOTA);
  if (!parsed.ok) {
    return NextResponse.json(
      { error: `quota_bytes ${parsed.error}` },
      { status: 400 },
    );
  }

  const admin = getSupabaseAdmin();
  const { data, error } = await admin
    .from('tunnels')
    .update({ quota_bytes: parsed.value })
    .eq('user_id', id)
    .select('subdomain')
    .maybeSingle<{ subdomain: string }>();
  if (error) {
    return NextResponse.json({ error: error.message }, { status: 500 });
  }
  if (!data) {
    return NextResponse.json({ error: 'tunnel not found' }, { status: 404 });
  }

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

  return NextResponse.json({ ok: true, quota_bytes: parsed.value });
}