// Clipboard helper — consolidates the ~6 duplicated copy-then-flash-label
// snippets and the delegated [data-copy-link] handler from mnw.js:670. Falls
// back to a prompt in non-secure contexts (plain HTTP, some iframes), where the
// old inline snippets silently no-op'd.

/** Copy `text`, flashing `copiedLabel` on `el`, then restoring the label. */
export function copyWithFeedback(el: HTMLElement, text: string, copiedLabel = 'Copied!', resetMs = 1500): void {
  const defaultLabel = el.textContent ?? '';
  const restore = () => {
    el.textContent = defaultLabel;
  };
  if (navigator.clipboard?.writeText) {
    navigator.clipboard
      .writeText(text)
      .then(() => {
        el.textContent = copiedLabel;
        setTimeout(restore, resetMs);
      })
      .catch(() => {
        window.prompt('Copy this link:', text);
      });
  } else {
    window.prompt('Copy this link:', text);
  }
}

/** Install the delegated `[data-copy-link]` handler. `href` stays the real
 *  destination (middle-click / no-JS / share still work); left-click copies.
 *  Ported from mnw.js:670. */
export function initCopyLink(): void {
  document.addEventListener('click', (evt) => {
    const el = (evt.target as Element | null)?.closest<HTMLElement>('[data-copy-link]');
    if (!el) return;
    evt.preventDefault();
    let url = el.dataset.url || el.getAttribute('href') || window.location.href;
    if (url.charAt(0) === '/') url = window.location.origin + url;
    const copiedLabel = el.dataset.copiedLabel || 'Copied!';
    copyWithFeedback(el, url, copiedLabel);
  });
}