import { t } from './i18n.js';
import * as platform from './platform.js';
import { groupLinkRoute } from './group-link.js';

/**
 * "Copy link": the `#/name@owner/path` address of a file or folder
 * (group-link.js), on this hub, put on the clipboard.
 *
 * The hub's origin, never the page's: in the desktop application the page is
 * `app://meshbay`, and a link that only opens inside one person's application
 * is not a link.
 */

/** The full link to `path` inside `group` (`{ name, owner_username }`). */
export function groupItemLink(group, path) {
  return platform.hubOrigin() + '/#' + groupLinkRoute(group, path);
}

/** An entry's path inside its group: its folder, root first, then its name. */
export function entryPath(entry, dir = entry.path) {
  return [dir, entry.name].filter(Boolean).join('/');
}

// The async clipboard first; the old command where it is refused — a page
// without focus, a WebView without the permission. Neither needs to read
// anything back.
async function _write(text) {
  try {
    await navigator.clipboard.writeText(text);
    return true;
  } catch { /* fall through */ }
  const area = document.createElement('textarea');
  area.value = text;
  area.setAttribute('readonly', '');
  area.style.cssText = 'position:fixed;top:0;left:0;opacity:0;pointer-events:none';
  document.body.appendChild(area);
  area.select();
  let ok = false;
  try { ok = document.execCommand('copy'); } catch { ok = false; }
  area.remove();
  return ok;
}

let _note = null;
let _noteTimer = null;

// Said once and gone, in the playlists' note (style.css `.playlist-note`).
// Appended to the body rather than rendered by a view, because the views that
// copy include modals and a context menu that has already closed.
function _say(text) {
  if (!_note) {
    _note = document.createElement('div');
    _note.className = 'playlist-note copy-link-note';
    _note.setAttribute('role', 'status');
  }
  _note.textContent = text;
  document.body.appendChild(_note);
  clearTimeout(_noteTimer);
  _noteTimer = setTimeout(() => { if (_note) _note.remove(); }, 2500);
}

/** Copy `url`, and say whether it worked. The link itself is shown if not. */
export async function copyLink(url) {
  if (!url) return;
  const ok = await _write(url);
  _say(ok ? t('link.copied') : t('link.copy_failed', { url }));
}