// One discovery cycle: scan → drop homelab guests → upsert → mark-absent → prune.
// Homelab containers/hosts are excluded from the IoT/personal devices band — they
// live in the network_hosts inventory, not here. We drop any MAC that's in
// network_hosts OR carries the Proxmox guest OUI (bc:24:11). Deps injected for
// tests. Prune only runs after a successful, non-empty scan.
import { runScan } from './scan.js';
import * as devices from '../db/repos/lan_devices.js';
import * as netHosts from '../db/repos/network_hosts.js';
import { log } from '../log.js';

const HOMELAB_OUI = 'bc:24:11'; // Proxmox auto-generated guest MAC prefix

export async function runDeviceScanCycle({ scan = runScan, repo = devices, hosts = netHosts } = {}) {
  const inventory = new Set((await hosts.all()).map(h => String(h.mac || '').toLowerCase()));
  const rows = (await scan()).filter(r => !inventory.has(r.mac) && !r.mac.startsWith(HOMELAB_OUI));
  if (!rows.length) {
    log.warn('device scan found no non-homelab hosts; skipping upsert/prune');
    return { seen: 0 };
  }
  await repo.upsertScan(rows);
  await repo.markAbsent(rows.map(r => r.mac));
  const pruned = await repo.prune();
  log.info({ seen: rows.length, pruned }, 'device scan cycle complete');
  return { seen: rows.length, pruned };
}