/* Download controls and device storage accounting. */
(function(root) {
  'use strict';
  const actionButtons = typeof module !== 'undefined' ? require('./download-actions.js') : root.DownloadActions;
  const errors = typeof module !== 'undefined' ? require('./download-errors.js') : root.DownloadErrors;
  const bytes = n => n >= 1073741824 ? `${(n / 1073741824).toFixed(1)} GB` : `${(n / 1048576).toFixed(1)} MB`;
  function breakdown(files, playlists) {
    const kinds = { video: 0, audio: 0, eq: 0 }, byId = new Map();
    for (const f of files) { const size = Math.max(0, Number(f.size) || 0); kinds[f.kind in kinds ? f.kind : 'video'] += size; byId.set(f.id, (byId.get(f.id) || 0) + size); }
    return { total: Object.values(kinds).reduce((a, b) => a + b, 0), kinds, playlists: playlists.map(p => ({ id: p.id, name: p.name || p.title || 'Playlist', size: [...new Set((p.videos || []).map(v => v.id))].reduce((n, id) => n + (byId.get(id) || 0), 0) })) };
  }
  let adapter, total = 0;
  function configure(options) {
    adapter = options;
    root.SettingsSections.register({ id: 'downloads-storage', title: 'Downloads & storage', cluster: 'Library & storage', description: 'Active queued paused failed saves, disk usage and playlist sizes', icon: '<path d="M12 3v12m-5-5 5 5 5-5M4 17v4h16v-4"/>', summary: () => `${adapter.slots()} at once · ${bytes(total)}`, render(container) {
      const doc = container.ownerDocument;
      const heading = doc.createElement('h3'); heading.textContent = 'Downloads & storage';
      const jobs = doc.createElement('div'); jobs.className = 'download-manager'; jobs.setAttribute('aria-label', 'Download manager');
      const storage = doc.createElement('div'); storage.className = 'download-storage';
      container.append(heading, jobs, storage);
      let alive = true, signature = '';
      function paint() {
        const items = adapter.jobs(); const next = JSON.stringify(items); if (next === signature) return; signature = next;
        jobs.replaceChildren();
        if (!items.length) { const p = doc.createElement('p'); p.textContent = 'No pending downloads.'; jobs.append(p); }
        for (const job of items) {
          const row = doc.createElement('div'); row.className = 'download-job';
          const title = doc.createElement('b'); title.textContent = job.title || job.id;
          const status = doc.createElement('small'); status.textContent = job.error ? errors.message(job.error) : job.status;
          const progress = doc.createElement('progress'); progress.max = job.progress?.total || 1; if (job.progress?.total) progress.value = job.progress.received || 0; progress.setAttribute('aria-label', `Saving ${job.title || job.id}`);
          const actions = doc.createElement('div');
          for (const action of [...(['active', 'queued'].includes(job.status) ? ['pause'] : [job.status === 'failed' ? 'retry' : 'resume']), 'cancel']) {
            const button = actionButtons.create(doc, action, job.title || job.id); button.onclick = () => { adapter.action(job.id, action); signature = ''; paint(); }; actions.append(button);
          }
          row.append(title, status, progress, actions);
          if (job.error) errors.appendDetails(row, job.error);
          jobs.append(row);
        }
      }
      async function disk() {
        try {
          const [files, estimate] = await Promise.all([adapter.files(), root.navigator.storage?.estimate?.() || {}]); if (!alive) return;
          const stats = breakdown(files, adapter.playlists()); total = stats.total; storage.replaceChildren();
          for (const text of [`Device media: ${bytes(total)}`, `Video ${bytes(stats.kinds.video)} · Audio ${bytes(stats.kinds.audio)} · EQ renders ${bytes(stats.kinds.eq)}`, estimate.quota ? `Available browser storage: ${bytes(Math.max(0, estimate.quota - (estimate.usage || 0)))}` : 'Available browser storage is not reported.', ...stats.playlists.map(p => `${p.name}: ${bytes(p.size)}`), 'Playlist totals include shared files; device totals count each file once. Browser quota is not total device free space.']) { const p = doc.createElement('p'); p.textContent = text; storage.append(p); }
          storage.dispatchEvent(new Event('change', { bubbles: true }));
        } catch { storage.textContent = 'Storage details are unavailable on this device.'; }
      }
      paint(); disk(); const timer = setInterval(paint, 1000), diskTimer = setInterval(disk, 15000);
      return () => { alive = false; clearInterval(timer); clearInterval(diskTimer); };
    } });
  }
  function getJobs() { return adapter && typeof adapter.jobs === 'function' ? adapter.jobs() : []; }
  function action(id, act) { if (adapter && typeof adapter.action === 'function') return adapter.action(id, act); }
  function getFiles() { return adapter && typeof adapter.files === 'function' ? adapter.files() : Promise.resolve([]); }
  function getPlaylists() { return adapter && typeof adapter.playlists === 'function' ? adapter.playlists() : []; }
  function getSlots() { return adapter && typeof adapter.slots === 'function' ? adapter.slots() : 4; }
  function snapshot() { return { jobs: getJobs(), slots: getSlots(), playlists: getPlaylists() }; }
  const api = { configure, breakdown, bytes, getJobs, action, getFiles, getPlaylists, getSlots, snapshot }; if (typeof module !== 'undefined') module.exports = api; else root.Downloads = api;
})(typeof window !== 'undefined' ? window : globalThis);