// public/views/cards/backups.js — offsite DR backup status (Core-4 -> Farm/Won).
// Fed by /usr/local/bin/offsite-backup.sh which POSTs each run to /api/backups.
import { el, mount } from '../../dom.js';
import { api } from '../../api.js';

let body, timer;

const gb = b => (b == null ? '–' : b >= 1e12 ? (b / 1e12).toFixed(1) + 'T' : Math.round(b / 1e9) + 'G');
function ago(ts) {
  const s = Math.max(0, (Date.now() - Date.parse(ts)) / 1000);
  if (s < 3600) return Math.floor(s / 60) + 'm';
  if (s < 86400) return Math.floor(s / 3600) + 'h';
  return Math.floor(s / 86400) + 'd';
}

async function load() {
  if (!body) return;
  try {
    const d = await api.get('/api/backups');
    const r = d.latest;
    if (!r) { mount(body, el('span', { class: 'muted' }, 'No offsite backups yet.')); return; }
    const stale = (Date.now() - Date.parse(r.ran_at)) > 8 * 86400000;  // >8d overdue
    const status = (!r.ok || stale) ? 'bad' : 'ok';
    const kids = [];
    kids.push(el('div', { class: 'sv-row' },
      el('span', { class: 'k' }, 'Last run'),
      el('span', { class: 'cl-badge ' + status }, r.ok ? ago(r.ran_at) + ' ago' : 'FAILED')));
    kids.push(el('div', { class: 'sv-row' },
      el('span', { class: 'k' }, 'Pushed to Farm'), el('span', {}, gb(r.total_bytes))));
    for (const g of (r.guests || []))
      kids.push(el('div', { class: 'sv-row' },
        el('span', { class: 'k' }, 'CT ' + g.vmid + ' ' + g.name),
        el('span', { class: 'muted' }, gb(g.bytes))));
    kids.push(el('div', { class: 'sv-row' },
      el('span', { class: 'k' }, 'Farm free'), el('span', {}, gb(r.won_free_bytes))));
    kids.push(el('div', { class: 'sv-row' },
      el('span', { class: 'k' }, 'Schedule'), el('span', { class: 'muted' }, d.schedule || 'weekly')));
    mount(body, el('div', { class: 'sv-cluster' }, ...kids));
  } catch { mount(body, el('span', { class: 'muted' }, 'Backups unavailable')); }
}

export default {
  id: 'backups', title: 'Backups · offsite', size: 's',
  mount(e) { body = e; load(); },
  start() { timer = setInterval(load, 60000); },
  stop() { clearInterval(timer); body = null; }
};