export const createSidebarPageTreeRuntime = (dependencies = {}) => {
  const {
    activeSidebarTreeMode,
    commandDocumentId,
    copyWorkspaceSourceParams,
    cssEscape,
    currentDocumentId,
    currentSourceKind,
    dispatchSidebarEvent,
    dispatchTreeCommand,
    normalizeSidebarTreeMode,
    openPageTreeContextMenu,
    persistLocalFolderSelfChangeSuppression,
    persistSidebarTreeMode,
    refreshLocalFolderSidebarSnapshot,
    refreshLocalFolderAfterCommand,
    resolveWorkspaceId,
    rowCenter,
    selectSidebarFileTreeDocument,
    toggleChildren,
    updateTitleEverywhere,
  } = dependencies;

  const PAGE_DRAG_MIME = 'application/x-mnote-page-tree-node';
  var mnoteNavigationInFlight = '';
  var draggingPageNodeId = '';
  var activePageDropRow = null;

  function navigateToDocument(nodeId, workspaceId, options) {
    if (!nodeId) return;
    var treeView = normalizeSidebarTreeMode(options && options.treeView ? options.treeView : activeSidebarTreeMode());
    persistSidebarTreeMode(treeView);
    if (currentDocumentId() === nodeId && window.location.pathname.indexOf('/documents/') === 0) {
      if (typeof window.__mnoteDocumentPaneRuntime?.activatePageTab === 'function') {
        window.__mnoteDocumentPaneRuntime.activatePageTab();
      }
      document.querySelectorAll('.tree-row[data-active="true"], .tree-row[data-selected="true"]').forEach(function(row) {
        if (row instanceof HTMLElement) {
          row.setAttribute('data-active', 'false');
          row.setAttribute('data-selected', 'false');
        }
      });
      document.querySelectorAll('.tree-row[data-node-id="' + cssEscape(nodeId) + '"], .tree-row[data-document-id="' + cssEscape(nodeId) + '"], .tree-row[data-doc-id="' + cssEscape(nodeId) + '"]').forEach(function(row) {
        if (row instanceof HTMLElement) {
          if (row.getAttribute('data-shell-mode') === 'filetree') {
            row.setAttribute('data-selected', String(row.getAttribute('data-row-id') === 'doc:' + nodeId));
          } else {
            row.setAttribute('data-active', 'true');
          }
        }
      });
      selectSidebarFileTreeDocument(nodeId, { scrollIntoView: true });
      return;
    }
    var targetUrl = new URL('/documents/' + encodeURIComponent(nodeId), window.location.origin);
    if (workspaceId) targetUrl.searchParams.set('workspaceId', workspaceId);
    if (treeView === 'filetree') targetUrl.searchParams.set('treeView', 'filetree');
    var fileTreeScope = String(options && options.fileTreeScope || '').trim();
    if (fileTreeScope) targetUrl.searchParams.set('fileTreeScope', fileTreeScope);
    copyWorkspaceSourceParams(targetUrl);
    var url = targetUrl.pathname + targetUrl.search;
    if (mnoteNavigationInFlight === url) return;
    if (typeof window.__mnoteDocumentPaneRuntime?.openPrimaryDocument === 'function') {
      mnoteNavigationInFlight = url;
      document.documentElement.setAttribute('data-mnote-navigation-pending', 'true');
      document.documentElement.setAttribute('data-mnote-navigation-target', nodeId);
      window.__mnoteDocumentPaneRuntime.openPrimaryDocument({
        documentId: nodeId,
        workspaceId: workspaceId || '',
        sourceKind: targetUrl.searchParams.get('sourceKind') || 'local_folder',
        rootUri: targetUrl.searchParams.get('rootUri') || '',
        url: targetUrl,
      }).then(function(){
        if (mnoteNavigationInFlight === url) mnoteNavigationInFlight = '';
        document.documentElement.removeAttribute('data-mnote-navigation-pending');
        selectSidebarFileTreeDocument(nodeId, { scrollIntoView: true });
      }).catch(function(error){
        console.warn('mnote pane 内导航失败，将回退整页导航', error);
        if (window.__mnoteTreeLiveEventSource && typeof window.__mnoteTreeLiveEventSource.close === 'function') {
          window.__mnoteTreeLiveEventSource.close();
        }
        window.location.assign(url);
      });
      return;
    }
    mnoteNavigationInFlight = url;
    document.documentElement.setAttribute('data-mnote-navigation-pending', 'true');
    document.documentElement.setAttribute('data-mnote-navigation-target', nodeId);
    if (window.__mnoteTreeLiveEventSource && typeof window.__mnoteTreeLiveEventSource.close === 'function') {
      window.__mnoteTreeLiveEventSource.close();
    }
    window.location.assign(url);
  }

  async function createPage(trigger, parentId) {
    var workspaceId = resolveWorkspaceId(trigger);
    var effectiveParentId = (parentId || trigger.getAttribute('data-parent-id') || '').trim();
    if (!workspaceId) return;
    var result = await dispatchTreeCommand(trigger, {
      action: 'create',
      workspaceId: workspaceId,
      parentId: effectiveParentId || null,
      title: '新页面'
    });
    var nextWorkspaceId = result.workspaceId || workspaceId;
    var nextDocumentId = commandDocumentId(result, '');
    if (nextDocumentId) {
      persistLocalFolderSelfChangeSuppression(nextDocumentId, Date.now() + 5000);
    }
    if (nextDocumentId && currentSourceKind() === 'local_folder') {
      if (typeof refreshLocalFolderAfterCommand === 'function') {
        await refreshLocalFolderAfterCommand('create', result, { parentId: effectiveParentId || null });
      }
      selectSidebarFileTreeDocument(nextDocumentId, { scrollIntoView: true });
      document.documentElement.setAttribute('data-mnote-create-page-selected-document-id', nextDocumentId);
    }
    navigateToDocument(nextDocumentId, nextWorkspaceId, { treeView: activeSidebarTreeMode() });
  }

  function startPageDrag(pageRow, event) {
    if (!(pageRow instanceof HTMLElement)) return false;
    draggingPageNodeId = pageRow.getAttribute('data-node-id') || '';
    if (event && event.dataTransfer) {
      event.dataTransfer.effectAllowed = 'move';
      event.dataTransfer.setData(PAGE_DRAG_MIME, draggingPageNodeId);
      event.dataTransfer.setData('text/plain', draggingPageNodeId);
    }
    return true;
  }

  function readPageDragNodeId(event) {
    var fromTransfer = event.dataTransfer ? event.dataTransfer.getData(PAGE_DRAG_MIME) || event.dataTransfer.getData('text/plain') : '';
    return (fromTransfer || draggingPageNodeId || '').trim();
  }

  function clearPageDropFeedback() {
    if (activePageDropRow instanceof HTMLElement) {
      activePageDropRow.setAttribute('data-drop-feedback', 'false');
    }
    activePageDropRow = null;
  }

  function setActivePageDropRow(row) {
    activePageDropRow = row instanceof HTMLElement ? row : null;
  }

  function clearPageDragState() {
    draggingPageNodeId = '';
    clearPageDropFeedback();
  }

  function handlePageTreeClick(event, helpers = {}) {
    var closestAction = helpers.closestAction;
    if (typeof closestAction !== 'function') return false;
    var tree = document.getElementById('sidebar-tree-root');
    if (!tree || !tree.contains(event.target)) return false;
    var pageRow = closestAction(event.target, '.tree-row[data-shell-mode="page"]');
    var btn = closestAction(event.target, '[data-rust-action]');
    if (!btn && !pageRow) return false;
    var nodeId = (btn && btn.getAttribute('data-node-id')) || (pageRow && pageRow.getAttribute('data-node-id')) || '';
    var action = btn ? btn.getAttribute('data-rust-action') : 'open';

    if (action === 'toggle') {
      var row = btn.closest('.tree-row');
      if (!row) return true;
      toggleChildren(row, btn);
      event.preventDefault();
    } else if (action === 'open') {
      var openTrigger = btn || pageRow;
      if (openTrigger && openTrigger.getAttribute('data-page-openable') === 'false') {
        event.preventDefault();
        return true;
      }
      var workspaceId = resolveWorkspaceId(openTrigger);
      navigateToDocument(nodeId, workspaceId, { treeView: 'page' });
      event.preventDefault();
    } else if (action === 'create') {
      event.preventDefault();
      void createPage(btn, nodeId);
    } else if (action === 'rename') {
      event.preventDefault();
      var title = window.prompt('重命名页面');
      if (title && title.trim()) {
        void dispatchTreeCommand(btn, {
          action: 'rename',
          workspaceId: resolveWorkspaceId(btn),
          documentId: nodeId,
          title: title.trim()
        }).then(function(){
          updateTitleEverywhere(nodeId, title.trim());
        });
      }
    } else if (action === 'menu') {
      event.preventDefault();
      var menuPoint = rowCenter(btn);
      dispatchSidebarEvent('tree.page.context-menu', { documentId: nodeId, target: { documentId: nodeId } });
      openPageTreeContextMenu(btn.closest('.tree-row'), menuPoint.x, menuPoint.y, btn);
    }
    return true;
  }

  function handlePageTreeContextMenu(event, helpers = {}) {
    var closestAction = helpers.closestAction;
    if (typeof closestAction !== 'function') return false;
    var pageRow = closestAction(event.target, '.tree-row[data-shell-mode="page"]');
    if (!pageRow) return false;
    event.preventDefault();
    openPageTreeContextMenu(pageRow, event.clientX, event.clientY, pageRow);
    return true;
  }

  function canDropPage(sourceNodeId, targetRow) {
    if (!sourceNodeId || !(targetRow instanceof HTMLElement)) return false;
    var targetNodeId = targetRow.getAttribute('data-node-id') || '';
    if (!targetNodeId || targetNodeId === sourceNodeId) return false;
    var sourceNode = document.querySelector('#sidebar-tree-root .tree-node[data-node-id="' + cssEscape(sourceNodeId) + '"]');
    return !(sourceNode instanceof HTMLElement && sourceNode.contains(targetRow));
  }

  function pageDropPosition(event, row) {
    var rect = row.getBoundingClientRect();
    var ratio = rect.height > 0 ? (event.clientY - rect.top) / rect.height : 0.5;
    if (ratio < 0.25) return 'before';
    if (ratio > 0.75) return 'after';
    return 'inside';
  }

  function resolvePageMoveTarget(targetRow, position) {
    var targetNodeId = targetRow.getAttribute('data-node-id') || '';
    var parentId = targetRow.getAttribute('data-parent-id') || null;
    if (position === 'inside') {
      var children = targetRow.parentElement ? targetRow.parentElement.querySelectorAll(':scope > .tree-children > .tree-node > .tree-row[data-shell-mode="page"]') : [];
      return { parentId: targetNodeId, sortOrder: children.length };
    }
    var siblings = Array.from(document.querySelectorAll('#sidebar-tree-root .tree-row[data-shell-mode="page"]')).filter(function(row) {
      return (row.getAttribute('data-parent-id') || '') === (parentId || '');
    });
    var index = siblings.indexOf(targetRow);
    return { parentId: parentId, sortOrder: Math.max(0, index + (position === 'after' ? 1 : 0)) };
  }



  return {
    navigateToDocument,
    createPage,
    startPageDrag,
    readPageDragNodeId,
    clearPageDropFeedback,
    setActivePageDropRow,
    clearPageDragState,
    handlePageTreeClick,
    handlePageTreeContextMenu,
    canDropPage,
    pageDropPosition,
    resolvePageMoveTarget,
  };
};