function createTodayBreak({
  timer, sheet, openButtons = null, cancelButton, presetButtons = null, form = null,
  minutesInput = null, error = null, status, resumeButton,
  qs = null, queryAll = null,
  historyRef = null, windowRef = null,
  now = () => Date.now(), setIntervalRef = setInterval, clearIntervalRef = clearInterval,
  onChange = () => {}, onResume = () => {},
}) {
  queryAll ||= selector => globalThis.document?.querySelectorAll(selector) || [];
  historyRef ||= globalThis.history;
  windowRef ||= globalThis.window;
  sheet ||= qs?.('#today-break-sheet');
  openButtons ||= queryAll?.('[data-today-break-open]') || [];
  cancelButton ||= qs?.('#cancel-today-break');
  presetButtons ||= queryAll?.('[data-today-break-minutes]') || [];
  form ||= qs?.('#today-break-custom-form');
  minutesInput ||= qs?.('#today-break-custom-minutes');
  error ||= qs?.('#today-break-error');
  status ||= qs?.('#today-break-status');
  resumeButton ||= qs?.('#resume-today-break');
  let ticker = null;
  let historyEntry = false;

  const stopTicker = () => {
    if (ticker !== null) clearIntervalRef(ticker);
    ticker = null;
  };
  const render = () => {
    const pending = timer.breakSnapshot();
    if (!pending) {
      stopTicker();
      status.hidden = true;
      resumeButton.hidden = true;
      openButtons.forEach(button => { button.hidden = false; });
      return false;
    }
    status.hidden = false;
    resumeButton.hidden = false;
    openButtons.forEach(button => { button.hidden = true; });
    const remaining = Math.max(0, pending.deadline_at - now());
    if (pending.expired || remaining <= 0) {
      status.textContent = 'Break over · ready to resume';
    } else {
      const seconds = Math.ceil(remaining / 1000);
      const minutes = Math.floor(seconds / 60);
      status.textContent = 'On break · resume in ' + minutes + ':' + String(seconds % 60).padStart(2, '0');
    }
    if (ticker === null) ticker = setIntervalRef(render, 1000);
    return true;
  };
  const close = () => {
    if (sheet.open) sheet.close();
    if (historyEntry) {
      historyEntry = false;
      historyRef?.back();
    }
  };
  const start = minutes => {
    if (!timer.startBreak(Number(minutes))) return false;
    if (error) error.textContent = '';
    close();
    render();
    onChange();
    return true;
  };
  const open = () => {
    if (!timer.snapshot().identity) return false;
    if (!sheet.open) {
      sheet.showModal();
      if (historyRef) {
        historyRef.pushState({...(historyRef.state || {}), todayBreak:true}, '');
        historyEntry = true;
      }
    }
    return true;
  };

  openButtons.forEach(button => button.addEventListener('click', open));
  cancelButton?.addEventListener('click', close);
  windowRef?.addEventListener('popstate', () => {
    historyEntry = false;
    if (sheet.open) sheet.close();
  });
  presetButtons.forEach(button => button.addEventListener('click', () =>
    start(button.dataset.todayBreakMinutes)
  ));
  form?.addEventListener('submit', event => {
    event.preventDefault();
    if (!start(Number(minutesInput?.value))) {
      if (error) error.textContent = 'Choose a whole number from 1 to 120 minutes.';
      minutesInput?.focus();
    }
  });
  resumeButton.addEventListener('click', () => {
    const pending = timer.breakSnapshot();
    if (!timer.resumeBreak()) return;
    onResume(pending.identity);
    render();
    onChange();
  });
  render();

  return { open, close, start, render };
}

if (typeof module !== 'undefined' && module.exports) module.exports = createTodayBreak;