function createProgressiveCapture({
  document,
  storage,
  getLogin = () => '',
  createCaptures = globalThis.createUnfiledCaptures,
  requestFullWorkspace = async () => {
    const lifecycle = await globalThis.stackchainWorkspaceLifecycle;
    return lifecycle?.optionalReady;
  },
  createId,
  now,
}) {
  const button = document.querySelector('[data-mobile-task="new"]');
  const root = document.querySelector('#create-issue-sheet');
  const title = document.querySelector('#create-issue-title');
  const body = document.querySelector('#create-issue-body');
  const heading = document.querySelector('#create-issue-heading');
  const save = document.querySelector('#save-unfiled-issue');
  const file = document.querySelector('#file-new-issue');
  const cancel = document.querySelector('#cancel-new-issue');
  const status = document.querySelector('#my-work-action-status');
  const captures = createCaptures({
    storage,
    getCaptureLogin:getLogin,
    getCurrentLogin:getLogin,
    ...(createId ? {createId} : {}),
    ...(now ? {now} : {}),
  });
  const listeners = [];
  let started = false;
  let saving = null;
  let saved = false;
  let handedOff = false;
  const checkpointKey = 'stackchain.progressive-capture.v1';

  function listen(element, name, callback) {
    element?.addEventListener?.(name, callback);
    listeners.push([element, name, callback]);
  }

  function close() {
    root?.classList.remove('open');
  }

  function readCheckpoints() {
    try {
      const record = JSON.parse(storage?.getItem(checkpointKey) || 'null');
      if (record?.version !== 1 || !Array.isArray(record.items)) return [];
      return record.items.filter(item => item && typeof item.ownerLogin === 'string' &&
        typeof item.title === 'string' && typeof item.body === 'string');
    } catch (_error) { return []; }
  }

  function readCheckpoint() {
    const login = String(getLogin() || '').trim();
    if (!login) return null;
    return readCheckpoints().find(item => item.ownerLogin === login) || null;
  }

  function checkpoint() {
    const ownerLogin = String(getLogin() || '').trim();
    if (!ownerLogin) return false;
    try {
      const items = readCheckpoints().filter(item => item.ownerLogin !== ownerLogin);
      items.push({
        ownerLogin,
        title:String(title?.value || '').slice(0, 255),
        body:String(body?.value || '').slice(0, 10000),
      });
      storage?.setItem(checkpointKey, JSON.stringify({
        version:1, items,
      }));
      return true;
    } catch (_error) { return false; }
  }

  function clearCheckpoint(expected) {
    const current = readCheckpoint();
    if (!current || current.title !== expected.title || current.body !== expected.body) return false;
    try {
      const ownerLogin = String(getLogin() || '').trim();
      const items = readCheckpoints().filter(item => item.ownerLogin !== ownerLogin);
      if (items.length) storage?.setItem(checkpointKey, JSON.stringify({version:1, items}));
      else storage?.removeItem(checkpointKey);
      return true;
    } catch (_error) { return false; }
  }

  function open(event) {
    saved = false;
    const recovered = readCheckpoint();
    if (recovered) {
      if (title) title.value = recovered.title;
      if (body) body.value = recovered.body;
      if (status) status.textContent = 'Unfinished capture restored from this phone.';
    }
    if (heading) heading.textContent = 'Capture work';
    root?.classList.add('open');
    title?.focus?.();
  }

  async function saveDraft() {
    if (saved || saving) return saving;
    save.disabled = true;
    const draft = {title:title?.value || '', body:body?.value || ''};
    saving = Promise.resolve().then(() => captures.save(draft)).then(() => {
      saved = true;
      clearCheckpoint(draft);
      if (title) title.value = '';
      if (body) body.value = '';
      close();
      if (status) status.textContent = 'Saved to Drafts. Choose a repository when you’re ready to file it.';
      return true;
    }).catch(error => {
      if (status) status.textContent = error.message;
      title?.focus?.();
      return false;
    }).finally(() => {
      save.disabled = false;
      saving = null;
    });
    return saving;
  }

  async function fileNow() {
    if (file.disabled) return false;
    file.disabled = true;
    if (status) status.textContent = 'Loading filing tools…';
    try {
      await requestFullWorkspace();
      return true;
    } catch (_error) {
      file.disabled = false;
      if (status) status.textContent = 'Filing tools unavailable. Your capture is still editable; retry when connected.';
      title?.focus?.();
      return false;
    }
  }

  function start() {
    if (started) return false;
    started = true;
    root?.classList.add('progressive-capture');
    listen(button, 'click', open);
    listen(save, 'click', saveDraft);
    listen(file, 'click', fileNow);
    listen(cancel, 'click', close);
    listen(title, 'input', checkpoint);
    listen(body, 'input', checkpoint);
    return true;
  }

  function handoff() {
    if (handedOff) return null;
    handedOff = true;
    const state = {
      open:Boolean(root?.classList.contains('open')),
      title:title?.value || '', body:body?.value || '',
    };
    state.complete = () => clearCheckpoint(state);
    root?.classList.remove('progressive-capture');
    file.disabled = false;
    listeners.forEach(([element, name, callback]) => element?.removeEventListener?.(name, callback));
    listeners.length = 0;
    return state;
  }

  return {start, handoff};
}

if (typeof window !== 'undefined' && typeof document !== 'undefined' &&
    typeof createUnfiledCaptures === 'function' &&
    window.matchMedia?.('(max-width: 600px)').matches === true) {
  window.stackchainProgressiveCapture = createProgressiveCapture({
    document,
    storage:window.localStorage,
    getLogin:() => window.stackchainProgressiveMyWork?.login?.() || '',
  });
  window.stackchainProgressiveCapture.start();
}

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