export const createSidebarAttachmentOpenRuntime = (dependencies = {}) => {
  const {
    attachmentClassForFileName,
    buildLocalFileOpenUrl,
    buildLocalOnlyOfficeOpenUrl,
    buildOnlyOfficeOpenPath,
    buildOnlyOfficeOpenUrl,
    buildPdfPreviewOpenUrl: injectedBuildPdfPreviewOpenUrl,
    closestAction: injectedClosestAction,
    currentDocumentId,
    currentRootUri,
    currentWorkspaceSourcePayload,
    fileTreeIconKindForFileName,
    healLegacyOfficeAttachmentParagraphs,
    hydrateEditorAttachmentMeta: injectedHydrateEditorAttachmentMeta,
    inferCodeAttachmentLanguage,
    inferOnlyOfficeFileType,
    isCodeAttachmentFileName,
    isPdfAttachmentFileName,
    localFilePathFromAssetId,
    openLocalOfficeFileInActiveTab,
    openLocalResourceInActiveTab,
    openTreeContextMenu,
    resolveWorkspaceId,
    triggerBrowserDownload,
    uploadedFileSize,
  } = dependencies;

  const closestAction = typeof injectedClosestAction === 'function' ? injectedClosestAction : function(target, selector) {
    var node = target && target.nodeType === Node.TEXT_NODE ? target.parentElement : target;
    return node && typeof node.closest === 'function' ? node.closest(selector) : null;
  };
  const hydrateEditorAttachmentMeta = typeof injectedHydrateEditorAttachmentMeta === 'function'
    ? injectedHydrateEditorAttachmentMeta
    : async function() {};

  var activeEditorAttachmentLink = null;
  var attachmentActionsHideTimer = 0;
  var editorAttachmentMissingByKey = new Map();
  var editorAttachmentRefreshSeqByKey = new Map();
  var editorAttachmentLinkSelector = '.editor-surface .ProseMirror a[data-mnote-attachment-link="true"], .editor-surface .ProseMirror a.mnote-uploaded-attachment-row, .editor-surface .ProseMirror a[href*="/api/local-folder/files/open"], .editor-surface .ProseMirror a[href*="/office-preview"]';

  function attachmentQueryParams(href) {
    try {
      return new URL(String(href || ''), window.location.origin).searchParams;
    } catch (_) {
      return new URLSearchParams();
    }
  }

  function localFileOpenPathFromHref(href) {
    try {
      var url = new URL(String(href || ''), window.location.origin);
      if (url.pathname !== '/api/local-folder/files/open') return '';
      return String(url.searchParams.get('path') || '').trim();
    } catch (_) {
      return '';
    }
  }

  function localFileOpenRootUriFromHref(href) {
    try {
      var url = new URL(String(href || ''), window.location.origin);
      if (url.pathname !== '/api/local-folder/files/open') return '';
      return String(url.searchParams.get('rootUri') || '').trim();
    } catch (_) {
      return '';
    }
  }

  function localFileOpenKeyFromHref(href) {
    var localFilePath = localFileOpenPathFromHref(href);
    if (!localFilePath) return '';
    var rootUri = localFileOpenRootUriFromHref(href) || currentRootUri() || '';
    return String(rootUri || '').trim() + '\n' + localFilePath;
  }

  function buildLocalFileStatusUrl(relativePath, rootUri) {
    var effectiveRootUri = String(rootUri || currentRootUri() || '').trim();
    if (!effectiveRootUri || !relativePath) return '';
    var url = new URL('/api/local-folder/files/stat', window.location.origin);
    url.searchParams.set('rootUri', effectiveRootUri);
    url.searchParams.set('path', relativePath);
    return url.toString();
  }

  function buildPdfPreviewOpenUrl(fileUrl, fileName) {
    if (typeof injectedBuildPdfPreviewOpenUrl === 'function') {
      return injectedBuildPdfPreviewOpenUrl(fileUrl, fileName);
    }
    var rawUrl = String(fileUrl || '').trim();
    if (!rawUrl) return '';
    var url = new URL('/pdf-preview', window.location.origin);
    url.searchParams.set('fileUrl', rawUrl);
    if (fileName) url.searchParams.set('fileName', fileName);
    return url.toString();
  }

  function setEditorAttachmentMissingState(link, missing) {
    if (!(link instanceof HTMLAnchorElement)) return;
    var value = Boolean(missing);
    if (value) {
      if (link.getAttribute('data-mnote-attachment-missing') === 'true' && link.classList.contains('mnote-uploaded-attachment-missing')) return;
      setAttributeIfChanged(link, 'data-mnote-attachment-missing', 'true');
      link.classList.add('mnote-uploaded-attachment-missing');
      setAttributeIfChanged(link, 'aria-label', (link.textContent || '附件') + '（文件不存在）');
    } else {
      if (link.getAttribute('data-mnote-attachment-missing') !== 'true') return;
      link.removeAttribute('data-mnote-attachment-missing');
      link.classList.remove('mnote-uploaded-attachment-missing');
      link.removeAttribute('aria-label');
    }
  }

  function setAttributeIfChanged(element, name, value) {
    var nextValue = String(value || '');
    if (element.getAttribute(name) === nextValue) return;
    element.setAttribute(name, nextValue);
  }

  function setEditorAttachmentMissingStateByHref(href, missing) {
    var targetKey = localFileOpenKeyFromHref(href);
    if (!targetKey) return;
    if (missing) {
      editorAttachmentMissingByKey.set(targetKey, true);
    } else {
      editorAttachmentMissingByKey.delete(targetKey);
    }
    document.querySelectorAll('.editor-surface .ProseMirror a[href*="/api/local-folder/files/open"]').forEach(function(candidate) {
      if (!(candidate instanceof HTMLAnchorElement)) return;
      var candidateHref = candidate.getAttribute('href') || candidate.href || '';
      if (localFileOpenKeyFromHref(candidateHref) !== targetKey) return;
      setEditorAttachmentMissingState(candidate, missing);
    });
  }

  async function refreshLocalAttachmentExistence(link) {
    if (!(link instanceof HTMLAnchorElement)) return;
    var href = link.getAttribute('href') || link.href || '';
    var attachmentKey = localFileOpenKeyFromHref(href);
    if (!attachmentKey) return;
    var refreshSeq = (editorAttachmentRefreshSeqByKey.get(attachmentKey) || 0) + 1;
    editorAttachmentRefreshSeqByKey.set(attachmentKey, refreshSeq);
    var localFilePath = localFileOpenPathFromHref(href);
    if (!localFilePath) return;
    var statusUrl = buildLocalFileStatusUrl(localFilePath, localFileOpenRootUriFromHref(href));
    if (!statusUrl) return;
    try {
      var response = await fetch(statusUrl, { headers: { accept: 'application/json' }, cache: 'no-store' });
      var payload = await response.json().catch(function() { return null; });
      if (editorAttachmentRefreshSeqByKey.get(attachmentKey) !== refreshSeq) return;
      if (!response.ok || !payload || payload.ok !== true || !payload.result) {
        setEditorAttachmentStatusErrorByHref(href, String(response.status || 'stat_failed'));
        return;
      }
      var exists = Boolean(response.ok && payload && payload.ok === true && payload.result && payload.result.exists === true);
      setEditorAttachmentStatusErrorByHref(href, '');
      setEditorAttachmentMissingStateByHref(href, !exists);
    } catch (_) {}
  }

  function setEditorAttachmentStatusErrorByHref(href, status) {
    var targetKey = localFileOpenKeyFromHref(href);
    if (!targetKey) return;
    document.querySelectorAll('.editor-surface .ProseMirror a[href*="/api/local-folder/files/open"]').forEach(function(candidate) {
      if (!(candidate instanceof HTMLAnchorElement)) return;
      var candidateHref = candidate.getAttribute('href') || candidate.href || '';
      if (localFileOpenKeyFromHref(candidateHref) !== targetKey) return;
      if (status) {
        setAttributeIfChanged(candidate, 'data-mnote-attachment-status-error', status);
      } else {
        candidate.removeAttribute('data-mnote-attachment-status-error');
      }
    });
  }

  function refreshEditorLocalAttachmentExistence() {
    document.querySelectorAll('.editor-surface .ProseMirror a[href*="/api/local-folder/files/open"]').forEach(function(link) {
      if (link instanceof HTMLAnchorElement) void refreshLocalAttachmentExistence(link);
    });
  }
  window.__mnoteRefreshEditorLocalAttachmentExistence = refreshEditorLocalAttachmentExistence;

  function scheduleEditorLocalAttachmentExistenceRefresh() {
    [120, 500, 1200].forEach(function(delayMs) {
      window.setTimeout(refreshEditorLocalAttachmentExistence, delayMs);
    });
  }

  function fileNameFromPath(path) {
    var value = String(path || '').trim();
    return value.indexOf('/') >= 0 ? value.split('/').pop() : value;
  }

  function isOnlyOfficeAttachmentHref(href) {
    try {
      var url = new URL(String(href || ''), window.location.origin);
      return url.pathname === '/onlyoffice' && (url.searchParams.has('assetId') || url.searchParams.has('fileName'));
    } catch (_) {
      return false;
    }
  }

  function normalizeOnlyOfficeAttachmentHref(href) {
    try {
      var url = new URL(String(href || ''), window.location.origin);
      if (url.pathname !== '/onlyoffice') return String(href || '');
      return buildOnlyOfficeOpenUrl({
        fileUrl: url.searchParams.get('fileUrl') || '',
        fileName: url.searchParams.get('fileName') || '未命名附件',
        fileType: url.searchParams.get('fileType') || inferOnlyOfficeFileType(url.searchParams.get('fileName') || '', ''),
        assetId: url.searchParams.get('assetId') || '',
        documentId: url.searchParams.get('documentId') || currentDocumentId() || '',
        userId: url.searchParams.get('userId') || '',
        mode: url.searchParams.get('mode') || 'view'
      });
    } catch (_) {
      return String(href || '');
    }
  }

  function isOfficeFileName(fileName) {
    return Boolean(inferOnlyOfficeFileType(fileName, ''));
  }

  function editorAttachmentPaneContext(link) {
    var pane = link && typeof link.closest === 'function' ? link.closest('[data-document-pane="true"]') : null;
    var roleHost = link && typeof link.closest === 'function' ? link.closest('[data-pane-role]') : null;
    var paneRole = (
      pane instanceof HTMLElement && pane.getAttribute('data-pane-role') === 'secondary'
    ) || (
      roleHost instanceof HTMLElement && roleHost.getAttribute('data-pane-role') === 'secondary'
    ) ? 'secondary' : 'primary';
    var paneDocumentId = '';
    var paneWorkspaceId = '';
    if (pane instanceof HTMLElement) {
      paneDocumentId = (pane.getAttribute('data-pane-document-id') || '').trim();
      paneWorkspaceId = (pane.getAttribute('data-pane-workspace-id') || '').trim();
      var shell = pane.querySelector('.document-shell[data-document-id]');
      if (!paneDocumentId && shell instanceof HTMLElement) paneDocumentId = (shell.getAttribute('data-document-id') || '').trim();
      if (!paneWorkspaceId && shell instanceof HTMLElement) paneWorkspaceId = (shell.getAttribute('data-workspace-id') || '').trim();
    }
    if (roleHost instanceof HTMLElement) {
      if (!paneDocumentId) paneDocumentId = (roleHost.getAttribute('data-document-id') || '').trim();
      if (!paneWorkspaceId) paneWorkspaceId = (roleHost.getAttribute('data-workspace-id') || '').trim();
      var roleHostShell = roleHost.matches('.document-shell') ? roleHost : roleHost.querySelector?.('.document-shell[data-document-id]');
      if (!paneDocumentId && roleHostShell instanceof HTMLElement) paneDocumentId = (roleHostShell.getAttribute('data-document-id') || '').trim();
      if (!paneWorkspaceId && roleHostShell instanceof HTMLElement) paneWorkspaceId = (roleHostShell.getAttribute('data-workspace-id') || '').trim();
    }
    return {
      paneRole: paneRole,
      documentId: paneDocumentId || currentDocumentId() || '',
      workspaceId: paneWorkspaceId || resolveWorkspaceId(document.body) || ''
    };
  }

  function detailFromEditorAttachmentLink(link) {
    var rawHref = link instanceof HTMLAnchorElement ? link.href : '';
    var params = attachmentQueryParams(rawHref);
    var paneContext = editorAttachmentPaneContext(link);
    var localFilePath = localFileOpenPathFromHref(rawHref);
    var fileName = params.get('fileName') || fileNameFromPath(localFilePath) || (link ? link.textContent : '') || '未命名附件';
    var fileType = params.get('fileType') || inferOnlyOfficeFileType(fileName, '');
    var assetId = params.get('assetId') || (link ? link.getAttribute('data-asset-id') : '') || (localFilePath ? 'local-file:' + localFilePath : '');
    var fileUrl = params.get('fileUrl') || '';
    var documentId = params.get('documentId') || paneContext.documentId || '';
    var href = rawHref;
    if (!isOnlyOfficeAttachmentHref(rawHref) && fileType) {
      fileUrl = rawHref;
      href = buildOnlyOfficeOpenUrl({
        fileUrl: fileUrl,
        fileName: fileName,
        fileType: fileType,
        assetId: assetId,
        documentId: documentId,
        userId: '',
        mode: 'view'
      });
    } else if (isOnlyOfficeAttachmentHref(rawHref)) {
      href = normalizeOnlyOfficeAttachmentHref(rawHref);
    }
    return {
      href: href,
      fileUrl: fileUrl,
      fileName: fileName,
      title: fileName,
      fileType: fileType,
      assetId: assetId,
      documentId: documentId,
      workspaceId: paneContext.workspaceId,
      paneRole: paneContext.paneRole,
      fileSize: (link ? link.getAttribute('data-file-size') : '') || ''
    };
  }

  function enhanceEditorAttachmentLink(link) {
    if (!(link instanceof HTMLAnchorElement)) return;
    var href = link.getAttribute('href') || '';
    var params = attachmentQueryParams(href);
    var localFilePath = localFileOpenPathFromHref(href);
    var paneContext = editorAttachmentPaneContext(link);
    var fileName = params.get('fileName') || fileNameFromPath(localFilePath) || link.textContent || '';
    var className = link.getAttribute('class') || '';
    var shouldEnhance = isOnlyOfficeAttachmentHref(href)
      || className.indexOf('mnote-uploaded-attachment-row') >= 0
      || isOfficeFileName(fileName)
      || Boolean(localFilePath);
    if (!shouldEnhance) return;
    setAttributeIfChanged(link, 'data-mnote-attachment-link', 'true');
    var assetId = params.get('assetId') || link.getAttribute('data-asset-id') || (localFilePath ? 'local-file:' + localFilePath : '');
    if (assetId) setAttributeIfChanged(link, 'data-asset-id', assetId);
    attachmentClassForFileName(fileName).split(/\s+/).forEach(function(name) {
      if (name) link.classList.add(name);
    });
    setAttributeIfChanged(link, 'target', '_blank');
    setAttributeIfChanged(link, 'rel', 'noopener noreferrer nofollow');
    if (localFilePath && !isOnlyOfficeAttachmentHref(href)) {
      setEditorAttachmentMissingState(link, editorAttachmentMissingByKey.has(localFileOpenKeyFromHref(href)));
      void refreshLocalAttachmentExistence(link);
      return;
    }
    if (isOnlyOfficeAttachmentHref(href)) {
      setAttributeIfChanged(link, 'href', buildOnlyOfficeOpenPath({
        fileUrl: params.get('fileUrl') || '',
        fileName: fileName || '未命名附件',
        fileType: params.get('fileType') || inferOnlyOfficeFileType(fileName, ''),
        assetId: assetId,
        documentId: params.get('documentId') || paneContext.documentId || '',
        userId: params.get('userId') || '',
        mode: params.get('mode') || 'view'
      }));
    }
    void hydrateEditorAttachmentMeta(link);
  }

  function enhanceEditorAttachmentLinks() {
    document.querySelectorAll('.editor-surface .ProseMirror a[href]').forEach(enhanceEditorAttachmentLink);
    void healLegacyOfficeAttachmentParagraphs();
  }
  window.__mnoteEnhanceEditorAttachmentLinks = function() {
    observeEditorAttachmentRoots();
    enhanceEditorAttachmentLinks();
  };
  var attachmentInitialEnhanceAttempts = 0;
  var attachmentInitialEnhanceTimer = window.setInterval(function() {
    attachmentInitialEnhanceAttempts += 1;
    enhanceEditorAttachmentLinks();
    if (attachmentInitialEnhanceAttempts >= 120) window.clearInterval(attachmentInitialEnhanceTimer);
  }, 500);
  var attachmentExistenceRefreshTimer = window.setInterval(function() {
    refreshEditorLocalAttachmentExistence();
  }, 2500);
  window.addEventListener('beforeunload', function() {
    if (attachmentExistenceRefreshTimer) window.clearInterval(attachmentExistenceRefreshTimer);
    attachmentExistenceRefreshTimer = 0;
  });
  var lastEditorAttachmentMouseOpen = { at: 0, href: '' };

  function ensureAttachmentActions() {
    var existing = document.querySelector('[data-testid="mnote-attachment-actions"]');
    if (existing instanceof HTMLElement) return existing;
    var actions = document.createElement('div');
    actions.className = 'mnote-attachment-actions';
    actions.setAttribute('data-testid', 'mnote-attachment-actions');
    actions.hidden = true;
    actions.innerHTML = '' +
      '<button type="button" class="mnote-attachment-action" data-testid="mnote-attachment-action-download" data-attachment-action="download" aria-label="下载附件"><span class="material-symbols-outlined" data-icon="download" aria-hidden="true"></span></button>' +
      '<button type="button" class="mnote-attachment-action" data-testid="mnote-attachment-action-menu" data-attachment-action="menu" aria-label="更多操作"><span class="material-symbols-outlined" data-icon="more_horiz" aria-hidden="true"></span></button>';
    actions.addEventListener('mouseenter', function() {
      if (attachmentActionsHideTimer) window.clearTimeout(attachmentActionsHideTimer);
    });
    actions.addEventListener('mouseleave', scheduleHideAttachmentActions);
    document.body.appendChild(actions);
    return actions;
  }

  function positionAttachmentActions(link) {
    if (!(link instanceof HTMLElement)) return;
    var actions = ensureAttachmentActions();
    var rect = link.getBoundingClientRect();
    actions.hidden = false;
    actions.style.left = Math.min(window.innerWidth - 76, Math.max(8, rect.right + 6)) + 'px';
    actions.style.top = Math.max(8, rect.top + (rect.height - 28) / 2) + 'px';
    activeEditorAttachmentLink = link;
  }

  function scheduleHideAttachmentActions() {
    if (attachmentActionsHideTimer) window.clearTimeout(attachmentActionsHideTimer);
    attachmentActionsHideTimer = window.setTimeout(function() {
      var actions = document.querySelector('[data-testid="mnote-attachment-actions"]');
      if (actions instanceof HTMLElement) actions.hidden = true;
      activeEditorAttachmentLink = null;
    }, 220);
  }

  async function openEditorAttachmentDetail(detail) {
    if (!detail || !detail.href) return;
    var localFilePath = localFilePathFromAssetId(detail.assetId);
    if (localFilePath) {
      if (await openLocalOfficeFileInActiveTab(detail, 'view')) return;
      var localFileName = detail.fileName || localFilePath.split('/').pop() || localFilePath;
      var localFileUrl = buildLocalFileOpenUrl(localFilePath, false);
      var localOpenUrl = isPdfAttachmentFileName(localFileName) ? buildPdfPreviewOpenUrl(localFileUrl, localFileName) : localFileUrl;
      // 非 Office 本地文件：用对应图标类型打开 active tab，失败则新窗口
      void openLocalResourceInActiveTab({
        path: localFilePath,
        title: localFileName,
        kind: fileTreeIconKindForFileName(localFileName),
        assetId: detail.assetId,
        documentId: detail.documentId || currentDocumentId() || '',
        workspaceId: detail.workspaceId || resolveWorkspaceId(document.body) || '',
        href: localOpenUrl,
        paneRole: detail.paneRole || 'primary'
      }).then(function(opened) {
        if (!opened) window.open(localOpenUrl || detail.href, '_blank', 'noopener,noreferrer');
      });
      return;
    }
    if (isPdfAttachmentFileName(detail.fileName)) {
      void openPdfEditorAttachment(detail);
      return;
    }
    if (isCodeAttachmentFileName(detail.fileName)) {
      void openCodeEditorAttachment(detail);
      return;
    }
    var fileType = String(detail.fileType || '').trim();
    if (fileType && typeof window.__mnoteDocumentPaneRuntime?.openResourceInActiveTab === 'function') {
      void window.__mnoteDocumentPaneRuntime.openResourceInActiveTab({
        objectIdentity: 'resource:onlyoffice:' + (detail.documentId || '') + ':' + (detail.assetId || ''),
        assetId: detail.assetId || '',
        title: detail.fileName || '附件',
        fileName: detail.fileName || '附件',
        kind: 'office',
        officeUrl: detail.href,
        documentId: detail.documentId || '',
        workspaceId: detail.workspaceId || '',
        paneRole: detail.paneRole || 'primary'
      });
      return;
    }
    window.open(detail.href, '_blank', 'noopener,noreferrer');
  }

  function openEditorAttachmentNewWindow(detail, mode) {
    if (!detail) return;
    var requestedMode = mode === 'edit' ? 'edit' : 'view';
    var localFilePath = localFilePathFromAssetId(detail.assetId);
    if (localFilePath) {
      var localFileName = localFilePath.split('/').pop() || localFilePath;
      var localOfficeUrl = buildLocalOnlyOfficeOpenUrl(localFilePath, localFileName, String(detail.documentId || currentDocumentId() || '').trim(), detail.assetId, requestedMode);
      var localFileUrl = buildLocalFileOpenUrl(localFilePath, false);
      var localPreviewUrl = isPdfAttachmentFileName(localFileName) ? buildPdfPreviewOpenUrl(localFileUrl, localFileName) : '';
      window.open(localOfficeUrl || localPreviewUrl || localFileUrl || detail.href, '_blank', 'noopener,noreferrer');
      return;
    }
    var href = detail.href || detail.fileUrl;
    if (detail.fileType && isOnlyOfficeAttachmentHref(href)) {
      try {
        var url = new URL(href, window.location.origin);
        url.searchParams.set('mode', requestedMode);
        href = url.toString();
      } catch (_) {}
    } else if (detail.fileType) {
      href = buildOnlyOfficeOpenUrl({
        fileUrl: detail.fileUrl || href || '',
        fileName: detail.fileName || '未命名附件',
        fileType: detail.fileType,
        assetId: detail.assetId || '',
        documentId: detail.documentId || currentDocumentId() || '',
        userId: '',
        mode: requestedMode
      });
    }
    window.open(href, '_blank', 'noopener,noreferrer');
  }

  async function openEditorAttachmentEditTab(detail) {
    if (!detail) return false;
    var localFilePath = localFilePathFromAssetId(detail.assetId);
    if (localFilePath) {
      if (await openLocalOfficeFileInActiveTab(detail, 'edit')) return true;
    }
    var href = detail.href || detail.fileUrl;
    if (detail.fileType && isOnlyOfficeAttachmentHref(href)) {
      try {
        var url = new URL(href, window.location.origin);
        url.searchParams.set('mode', 'edit');
        href = url.toString();
      } catch (_) {}
    } else if (detail.fileType) {
      href = buildOnlyOfficeOpenUrl({
        fileUrl: detail.fileUrl || href || '',
        fileName: detail.fileName || '未命名附件',
        fileType: detail.fileType,
        assetId: detail.assetId || '',
        documentId: detail.documentId || currentDocumentId() || '',
        userId: '',
        mode: 'edit'
      });
    }
    if (detail.fileType && typeof window.__mnoteDocumentPaneRuntime?.openResourceInActiveTab === 'function') {
      var didOpenEditTab = await window.__mnoteDocumentPaneRuntime.openResourceInActiveTab({
        objectIdentity: 'resource:onlyoffice:' + (detail.documentId || '') + ':' + (detail.assetId || ''),
        assetId: detail.assetId || '',
        title: detail.fileName || '附件',
        fileName: detail.fileName || '附件',
        kind: 'office',
        officeUrl: href,
        documentId: detail.documentId || '',
        workspaceId: detail.workspaceId || '',
        paneRole: detail.paneRole || 'primary'
      });
      if (!didOpenEditTab && href) window.open(href, '_blank', 'noopener,noreferrer');
      return didOpenEditTab;
    }
    if (href) window.open(href, '_blank', 'noopener,noreferrer');
    return false;
  }

  async function resolveEditorAttachmentUrl(detail) {
    var assetId = String(detail && detail.assetId || '').trim();
    var localFilePath = localFilePathFromAssetId(assetId);
    if (localFilePath) {
      var localUrl = buildLocalFileOpenUrl(localFilePath, false);
      if (localUrl) {
        return {
          url: localUrl,
          asset: {
            file_name: String(detail && detail.fileName || '').trim(),
            fileSize: String(detail && detail.fileSize || '').trim()
          }
        };
      }
    }
    if (assetId) {
      var response = await fetch('/api/media/sign?assetId=' + encodeURIComponent(assetId), {
        method: 'GET',
        credentials: 'include',
        cache: 'no-store'
      });
      var payload = await response.json().catch(function() { return null; });
      if (!response.ok || !payload) {
        throw new Error(payload && payload.error ? payload.error : '生成签名链接失败');
      }
      var signedUrl = String(payload && payload.signedUrl || '').trim();
      if (!signedUrl) throw new Error('附件链接不可用');
      return {
        url: signedUrl,
        asset: payload.asset && typeof payload.asset === 'object' ? payload.asset : {}
      };
    }
    var url = String(detail && (detail.fileUrl || detail.href) || '').trim();
    if (!url) throw new Error('附件链接不可用');
    return { url: url, asset: {} };
  }

  async function openPdfEditorAttachment(detail) {
    try {
      var resolved = await resolveEditorAttachmentUrl(detail);
      var title = String(detail.fileName || resolved.asset.file_name || 'PDF').trim() || 'PDF';
      var previewUrl = buildPdfPreviewOpenUrl(resolved.url, title);
      if (typeof window.__mnoteDocumentPaneRuntime?.openResourceInActiveTab === 'function') {
        var didOpenPdfTab = await window.__mnoteDocumentPaneRuntime.openResourceInActiveTab({
          objectIdentity: 'resource:pdf:' + (detail.documentId || '') + ':' + (detail.assetId || previewUrl || resolved.url),
          assetId: detail.assetId || '',
          title: title,
          fileName: title,
          kind: 'pdf',
          href: previewUrl,
          documentId: detail.documentId || '',
          workspaceId: detail.workspaceId || '',
          paneRole: detail.paneRole || 'primary'
        });
        if (didOpenPdfTab) return;
      }
      window.open(previewUrl || resolved.url, '_blank', 'noopener,noreferrer');
    } catch (error) {
      window.alert(error && error.message ? error.message : '打开 PDF 失败');
    }
  }

  async function openCodeEditorAttachment(detail) {
    var resolved = null;
    try {
      resolved = await resolveEditorAttachmentUrl(detail);
      var size = Number(resolved.asset && (resolved.asset.file_size || resolved.asset.fileSize) || 0);
      if (Number.isFinite(size) && size > 1024 * 1024) {
        window.open(resolved.url, '_blank', 'noopener,noreferrer');
        return;
      }
      var response = await fetch(resolved.url, {
        method: 'GET',
        credentials: 'include',
        cache: 'no-store'
      });
      if (!response.ok) throw new Error('读取附件内容失败');
      var text = await response.text();
      if (text.length > 1024 * 1024) {
        window.open(resolved.url, '_blank', 'noopener,noreferrer');
        return;
      }
      var editorRoot = document.querySelector('.editor-surface .ProseMirror');
      var editor = editorRoot && editorRoot.editor;
      if (!editor || !editor.chain) {
        window.open(resolved.url, '_blank', 'noopener,noreferrer');
        return;
      }
      var title = String(detail.fileName || resolved.asset.file_name || '附件').trim() || '附件';
      var language = inferCodeAttachmentLanguage(title);
      editor.chain().focus().insertContent([
        {
          type: 'paragraph',
          content: [{ type: 'text', text: title }]
        },
        {
          type: 'codeBlock',
          attrs: { language: language },
          content: text ? [{ type: 'text', text: text.replace(/\r\n?/g, '\n') }] : []
        }
      ]).run();
    } catch (error) {
      console.warn('[mnote attachment] open code attachment failed', error);
      if (resolved && resolved.url) {
        window.open(resolved.url, '_blank', 'noopener,noreferrer');
        return;
      }
      window.alert(error && error.message ? error.message : '打开代码附件失败');
    }
  }

  async function openEditorAttachmentDownload(detail) {
    if (!detail) return;
    var localFilePath = localFilePathFromAssetId(detail.assetId);
    if (localFilePath) {
      var localDownloadUrl = buildLocalFileOpenUrl(localFilePath, true);
      if (localDownloadUrl) {
        triggerBrowserDownload(localDownloadUrl);
        return;
      }
    }
    if (detail.assetId) {
      try {
        var response = await fetch('/api/media/sign?assetId=' + encodeURIComponent(detail.assetId), {
          method: 'GET',
          credentials: 'include'
        });
        var payload = await response.json().catch(function() { return null; });
        var signedUrl = String(payload && payload.signedUrl || '').trim();
        if (response.ok && signedUrl) {
          window.open(signedUrl, '_blank', 'noopener,noreferrer');
          return;
        }
      } catch (_) {}
    }
    var localRelativePath = String(detail.localRelativePath || '').trim();
    if (localRelativePath) {
      var localPathDownloadUrl = buildLocalFileOpenUrl(localRelativePath, true);
      if (localPathDownloadUrl) {
        triggerBrowserDownload(localPathDownloadUrl);
        return;
      }
    }
    var target = detail.fileUrl || detail.href;
    if (!target) return;
    window.open(target, '_blank', 'noopener,noreferrer');
  }

  function openEditorAttachmentMenu(link, trigger, point) {
    var detail = detailFromEditorAttachmentLink(link);
    var rect = trigger && trigger.getBoundingClientRect ? trigger.getBoundingClientRect() : link.getBoundingClientRect();
    var x = point && typeof point.x === 'number' ? point.x : rect.right;
    var y = point && typeof point.y === 'number' ? point.y : rect.bottom + 4;
    openTreeContextMenu('attachment', detail, x, y, trigger || link);
  }

  function openEditorAttachmentLink(link) {
    enhanceEditorAttachmentLink(link);
    openEditorAttachmentDetail(detailFromEditorAttachmentLink(link));
  }

  enhanceEditorAttachmentLinks();
  var attachmentEnhanceFrame = 0;
  var attachmentEditorObserver = null;
  var attachmentObservedEditors = typeof WeakSet === 'function' ? new WeakSet() : null;
  function scheduleEditorAttachmentEnhance() {
    if (attachmentEnhanceFrame) return;
    attachmentEnhanceFrame = window.requestAnimationFrame(function() {
      attachmentEnhanceFrame = 0;
      enhanceEditorAttachmentLinks();
      observeEditorAttachmentRoots();
    });
  }
  function addedNodeMayContainEditorAttachmentLink(node) {
    return node instanceof HTMLElement && (
      node.matches('.editor-surface .ProseMirror, .editor-surface .ProseMirror a[href], .editor-surface .ProseMirror p, .editor-surface .ProseMirror span, .editor-surface .ProseMirror div')
      || node.querySelector?.('.editor-surface .ProseMirror, .editor-surface .ProseMirror a[href]')
    );
  }
  function observeEditorAttachmentRoots() {
    if (!attachmentEditorObserver) return;
    document.querySelectorAll('.editor-surface .ProseMirror').forEach(function(editor) {
      if (!(editor instanceof HTMLElement)) return;
      if (attachmentObservedEditors && attachmentObservedEditors.has(editor)) return;
      if (attachmentObservedEditors) attachmentObservedEditors.add(editor);
      attachmentEditorObserver.observe(editor, { childList: true, subtree: true });
    });
  }
  attachmentEditorObserver = new MutationObserver(function(records) {
    var shouldEnhance = Array.isArray(records) && records.some(function(record) {
      if (!record || record.type !== 'childList') return false;
      return Array.from(record.addedNodes || []).some(function(node) {
        return addedNodeMayContainEditorAttachmentLink(node);
      });
    });
    if (!shouldEnhance) return;
    scheduleEditorAttachmentEnhance();
  });
  attachmentEditorObserver.observe(document.documentElement, { childList: true, subtree: true });
  observeEditorAttachmentRoots();
  window.addEventListener('mnote:editor-attachment-links-changed', function() {
    window.__mnoteEnhanceEditorAttachmentLinks();
    scheduleEditorAttachmentEnhance();
  });
  window.addEventListener('tree:delta', scheduleEditorLocalAttachmentExistenceRefresh);
  window.addEventListener('tree:resync', scheduleEditorLocalAttachmentExistenceRefresh);
  [
    'mnote:leptos-tiptap-spike:ready',
    'mnote:leptos-tiptap-spike:change',
    'mnote:leptos-tiptap-spike:state'
  ].forEach(function(eventName) {
    window.addEventListener(eventName, function() {
      enhanceEditorAttachmentLinks();
      observeEditorAttachmentRoots();
      window.setTimeout(function() {
        enhanceEditorAttachmentLinks();
        observeEditorAttachmentRoots();
      }, 120);
    }, true);
  });
  [120, 500, 1200, 2500].forEach(function(delayMs) {
    window.setTimeout(function() {
      enhanceEditorAttachmentLinks();
      observeEditorAttachmentRoots();
    }, delayMs);
  });

  function interceptEditorAttachmentLink(event) {
    var editorAttachmentLink = closestAction(event.target, editorAttachmentLinkSelector);
    if (!(editorAttachmentLink instanceof HTMLAnchorElement)) return;
    event.preventDefault();
    event.stopPropagation();
    if (typeof event.stopImmediatePropagation === 'function') event.stopImmediatePropagation();
    var href = editorAttachmentLink.href || editorAttachmentLink.getAttribute('href') || '';
    if (lastEditorAttachmentMouseOpen.href === href && Date.now() - lastEditorAttachmentMouseOpen.at < 900) return;
    openEditorAttachmentLink(editorAttachmentLink);
  }

  function suppressEditorAttachmentLinkDefault(event) {
    var editorAttachmentLink = closestAction(event.target, editorAttachmentLinkSelector);
    if (!(editorAttachmentLink instanceof HTMLAnchorElement)) return;
    event.preventDefault();
    event.stopPropagation();
    if (typeof event.stopImmediatePropagation === 'function') event.stopImmediatePropagation();
    if (Number(event.button || 0) !== 0) return;
    lastEditorAttachmentMouseOpen = {
      at: Date.now(),
      href: editorAttachmentLink.href || editorAttachmentLink.getAttribute('href') || ''
    };
    openEditorAttachmentLink(editorAttachmentLink);
  }

  window.addEventListener('mousedown', suppressEditorAttachmentLinkDefault, true);
  window.addEventListener('click', interceptEditorAttachmentLink, true);

  document.addEventListener('mouseover', function(event) {
    var link = closestAction(event.target, editorAttachmentLinkSelector);
    if (!(link instanceof HTMLAnchorElement)) return;
    if (attachmentActionsHideTimer) window.clearTimeout(attachmentActionsHideTimer);
    enhanceEditorAttachmentLink(link);
    positionAttachmentActions(link);
  });

  document.addEventListener('mouseout', function(event) {
    var link = closestAction(event.target, editorAttachmentLinkSelector);
    if (!(link instanceof HTMLAnchorElement)) return;
    var next = event.relatedTarget;
    var actions = document.querySelector('[data-testid="mnote-attachment-actions"]');
    if (next && (link.contains(next) || (actions && actions.contains(next)))) return;
    scheduleHideAttachmentActions();
  });


  return {
    detailFromEditorAttachmentLink,
    enhanceEditorAttachmentLink,
    enhanceEditorAttachmentLinks,
    openCodeEditorAttachment,
    openEditorAttachmentDetail,
    openEditorAttachmentDownload,
    openEditorAttachmentEditTab,
    openEditorAttachmentNewWindow,
    refreshEditorLocalAttachmentExistence,
  };
};