//
//  KMLeftSideViewController+Outline.swift
//  PDF Reader Pro
//
//  Created by tangchao on 2023/12/22.
//

import Foundation

enum KMOutlineViewMenuItemTag: Int {
    case addEntry = 0
    case addChild
    case addAunt
    case remove
    case edit
    case setDestination
    case rename
    case promote
    case demote
}

extension KMLeftSideViewController {
    func outline_initSubViews() {
        self.outlineSearchField.delegate = self
        self.outlineAddButton.target = self
        self.outlineAddButton.action = #selector(outlineContextMenuItemClicked_AddEntry)
        
        self.outlineMoreButton.target = self
        self.outlineMoreButton.tag = 302
        self.outlineMoreButton.action = #selector(leftSideViewMoreButtonAction)

        self.outlineDoneButton.target = self
        self.outlineDoneButton.tag = 310
        self.outlineDoneButton.action = #selector(leftSideViewDoneButtonAction)
        
        let menuOutline = NSMenu()
        _ = menuOutline.addItem(title: KMLocalizedString("Ignore Case", "Menu item title"), action: #selector(toggleOutlineCaseInsensitiveSearch), target: self)
        (self.outlineSearchField.cell as? NSSearchFieldCell)?.searchMenuTemplate = menuOutline
        self.outlineSearchField.target = self
        
        self.tocOutlineView.menu = NSMenu()
        self.tocOutlineView.menu?.delegate = self
        self.tocOutlineView.delegate = self
        self.tocOutlineView.dataSource = self
        self.tocOutlineView.botaDelegate = self
        self.tocOutlineView.botaDataSource = self
        self.tocOutlineView.tocDelegate = self
        self.tocOutlineView.registerForDraggedTypes([.localDraggedTypes])
        self.tocOutlineView.target = self
        self.tocOutlineView.doubleAction = #selector(outlineContextMenuItemClicked_Rename)
    }
    
    func outline_initDefalutValue() {
        self.outlineView.wantsLayer = true
        self.outlineView.layer?.backgroundColor = KMAppearance.Layout.l0Color().cgColor
        
        self.outlineLabel.stringValue = KMLocalizedString("Outline", nil);
        self.outlineLabel.textColor = KMAppearance.Layout.h0Color()
        self.outlineAddButton.toolTip = KMLocalizedString("Add Item", nil)
        
        self.outlineSearchButton.toolTip = KMLocalizedString("Search", nil)
        
        self.outlineDoneButton.title = KMLocalizedString("Done", nil);
        self.outlineDoneButton.toolTip = KMLocalizedString("Done", nil);
        self.outlineDoneButton.setTitleColor(KMAppearance.Layout.w0Color())
        self.outlineDoneButton.wantsLayer = true
        self.outlineDoneButton.layer?.backgroundColor = KMAppearance.Interactive.a0Color().cgColor
        self.outlineDoneButton.layer?.cornerRadius = 4.0
        
        self.outlineSearchField.wantsLayer = true
        self.outlineSearchField.backgroundColor = KMAppearance.Layout.l_1Color()
        self.outlineSearchField.layer?.backgroundColor = KMAppearance.Layout.l_1Color().cgColor
        self.outlineSearchField.layer?.borderWidth = 1.0
        self.outlineSearchField.layer?.borderColor = KMAppearance.Interactive.a0Color().cgColor
        
        self.outlineDoneButton.isHidden = true
        self.outlineSearchField.isHidden = true
        
        (self.outlineSearchField.cell as? NSSearchFieldCell)?.placeholderString = KMLocalizedString("Search Outline", nil)
        
        self.tocOutlineView.backgroundColor = KMAppearance.Layout.l0Color()
        self.tocOutlineView.autoresizesOutlineColumn = false
        self.tocOutlineView.allowsMultipleSelection = true
        self.tocOutlineView.allowsEmptySelection = true
        self.tocOutlineView.focusRingType = .none
        self.tocOutlineView.autoresizesSubviews = true
    }
    
    func updateOutlineSelection() {
        if self.outlineRoot() == nil || self.updatingOutlineSelection {
            return
        }
        self.updatingOutlineSelection = true
        let numRows = self.tocOutlineView.numberOfRows
        let currentPage = self.currentPage()
        var flagIdx = NSNotFound
        for i in 0 ..< numRows {
            guard let ol = self.tocOutlineView.item(atRow: i) as? CPDFOutline else {
                continue
            }
            guard let page = ol.km_page else {
                continue
            }
            if page.isEqual(to: currentPage) {
                flagIdx = i
                break
            }
        }
        
        if flagIdx != NSNotFound {
            self.tocOutlineView.km_safe_selectRowIndexes(.init(integer: flagIdx), byExtendingSelection: false)
            self.tocOutlineView.scrollRowToVisible(flagIdx)
        } else {
            self.tocOutlineView.deselectRow(self.tocOutlineView.selectedRow)
        }
        self.updatingOutlineSelection = false
    }
     
    func newAddOutlineEntryEditingMode(_ index: Int) {
        self.renamePDFOutline = self.tocOutlineView.item(atRow: self.tocOutlineView.selectedRow) as? CPDFOutline
        let row = self.tocOutlineView.selectedRow
        let viewS = self.tocOutlineView.view(atColumn: 0, row: row, makeIfNecessary: true)
        let targrtTextField = viewS?.subviews.first as? NSTextField
        self.renamePDFOutlineTextField = targrtTextField
        targrtTextField?.delegate = self
        targrtTextField?.isEditable = true
        targrtTextField?.becomeFirstResponder()
    }
    
    func selectedRowIndexes() -> IndexSet {
        var selectedIndexes = self.tocOutlineView.selectedRowIndexes
        let clickedRow = self.tocOutlineView.clickedRow
        if clickedRow != -1 && selectedIndexes.contains(clickedRow) == false {
            let indexes = IndexSet(integer: clickedRow)
            selectedIndexes = indexes
        }
        return selectedIndexes
    }
    
    func editOutlineUI(_ editVC: KMOutlineEditViewController) {
        guard let ol = editVC.outline else {
            return
        }
        
        if editVC.pageButton.state == .on {
            let numberString = editVC.outlineTargetPageIndexTextField.stringValue
            let idx = Int(numberString) ?? 1
            let newPage = editVC.pdfView?.document.page(at: UInt(idx-1))
            if let data = newPage?.pageIndex(), data != editVC.originalPageIndex {
                //新page不存在
                if (newPage == nil) {

                } else {
                    let pageSize = newPage?.bounds(for: .cropBox).size ?? .zero
                    if let dest = CPDFDestination(page: newPage, at: NSMakePoint(pageSize.width, pageSize.height)) {
                        self.changePDFOutlineDestination(dest, PDFoutline: ol)
                    }
                }
            }
        } else if editVC.urlButton.state == .on {
            var urlString = editVC.outlineURLTextField.stringValue
            let tLowerUrl = urlString.lowercased()
            if tLowerUrl.hasPrefix(kHTTPSPrefix) == false && tLowerUrl.hasPrefix(kFTPPrefix) == false && tLowerUrl.hasPrefix(kHTTPPrefix) == false && urlString.isEmpty == false {
                urlString = "\(kHTTPPrefix)\(urlString)"
            }
            if let act = CPDFURLAction(url: urlString) {
                if editVC.originalURLString != editVC.outlineURLTextField.stringValue {
                    self.changePDFAction(act, PDFOutline: ol)
                }
            }
        } else if editVC.mailButton.state == .on {
            var mailString = editVC.mailAddressTextField.stringValue
            let tLowerStr = mailString.lowercased()
            if tLowerStr.hasPrefix(kEmailPrefix) == false {
                mailString = "\(kEmailPrefix)\(mailString)"
            }

            if var urlAction = CPDFURLAction(url: mailString) {
                if urlAction.url() == nil {
                    urlAction = CPDFURLAction(url: kEmailPrefix)
                }
                if mailString != editVC.originalURLString {
                    self.changePDFAction(urlAction, PDFOutline: ol)
                }
            }
        }
        
        if editVC.outlineNameTextView.string != editVC.originalLabel {
            self.renamePDFOutline(ol, label: editVC.outlineNameTextView.string)
        }
    }
    
    @objc func outlineContextMenuItemClicked_AddEntry(_ sender: AnyObject?) {
        let ris = self.selectedRowIndexes()
        if ris.isEmpty {
            var rootOL = self.outlineRoot()
            if rootOL == nil {
                rootOL = self.setNewOutlineRoot()
            }

            let ol = CPDFOutline()
            ol.label = String(format: "%@ %ld", KMLocalizedString("Page", nil), self.currentPageIndex()+1)
            ol.destination = self.currentDestination()
            self.addoutline(parent: rootOL, addOutline: ol, index: Int(rootOL?.numberOfChildren ?? 0), needExpand: false)
            return
        }
        
        if let row = ris.last {
            let item = self.tocOutlineView.item(atRow: row) as? CPDFOutline
            let ol = CPDFOutline()
            ol.label = String(format: "%@ %ld", KMLocalizedString("Page", nil), self.currentPageIndex()+1)
            ol.destination = self.currentDestination()
            let idx = Int(item?.index ?? 0) + 1
            self.addoutline(parent: item?.parent, addOutline: ol, index: idx, needExpand: false)
            self.tocOutlineView.scrollRowToVisible(idx)
            self.tocOutlineView.deselectRow(idx)
        }
    }
    
    @IBAction func outlineNormalSearchButtonAction(_ sender: NSButton) {
        self.outlineSearchField.isHidden = false
        self.outlineDoneButton.isHidden = false
        self.outlineLabel.isHidden = true
        self.outlineSearchButton.isHidden = true
        self.outlineMoreButton.isHidden = true
        self.outlineAddButton.isHidden = true
        
        self.outlineSearchField.becomeFirstResponder()
    }
    
    @IBAction func toc_expandAllComments(_ sender: AnyObject?) {
        if (self.tocType == .unfold) {
            return
        }
        self.tocType = .unfold
        self.tocOutlineView.reloadData()
        self.tocOutlineView.expandItem(nil, expandChildren: true)
    }
    
    @IBAction func toc_foldAllComments(_ sender: AnyObject?) {
        if (self.tocType == .fold) {
            return
        }
        self.tocType = .fold
        self.tocOutlineView.reloadData()
        self.tocOutlineView.collapseItem(nil, collapseChildren: true)
    }
    
    @objc func leftSideEmptyAnnotationClick_DeleteOutline(_ sender: AnyObject?) {
        let alert = NSAlert()
        alert.alertStyle = .critical
        alert.messageText = ""
        alert.informativeText = KMLocalizedString("This will permanently remove all outlines. Are you sure to continue?", nil)
        alert.addButton(withTitle: KMLocalizedString("Yes", nil))
        alert.addButton(withTitle: KMLocalizedString("No", nil))
        let response = alert.runModal()
        if response == .alertFirstButtonReturn {
            if let item = self.outlineRoot() {
                self.removeAllOutline(item)
            }
        }
    }
    
    func showSearchOutlineBlankState(_ toShowState: Bool) {
        if (toShowState) {
            let documentViewFrame = self.tocOutlineView.enclosingScrollView?.documentView?.frame ?? .zero
            let width = self.leftSideEmptyVC.outlineSearchView.bounds.size.width
            let height = self.leftSideEmptyVC.outlineSearchView.bounds.size.height
            self.leftSideEmptyVC.outlineSearchView.frame = NSMakeRect((documentViewFrame.size.width - width)/2.0, (documentViewFrame.size.height - height)/2.0, width, height)
            self.tocOutlineView.enclosingScrollView?.documentView?.addSubview(self.leftSideEmptyVC.outlineSearchView)
            self.leftSideEmptyVC.outlineSearchView.autoresizingMask = [.minXMargin, .maxXMargin, .minYMargin, .maxYMargin]
        } else {
            self.leftSideEmptyVC.outlineSearchView.removeFromSuperview()
        }
    }
    
    func removeAllOutline(_ outline: CPDFOutline) {
        _ = self.setNewOutlineRoot()
        
        for i in 0 ..< self.pageCount() {
            self.pdfDocument()?.removeBookmark(forPageIndex: UInt(i))
        }
        self.layoutDocumentView()
        DispatchQueue.main.async {
            self.tocOutlineView.reloadData()
        }
    }
    
    func updateSelectRowHeight() {
        guard let ol = self.tocOutlineView.selectedItem() as? CPDFOutline else {
            return
        }
        let attriString = NSMutableAttributedString()
        let attri = [NSAttributedString.Key.foregroundColor : KMAppearance.Layout.h0Color()]
        attriString.append(.init(string: ol.label ?? "", attributes: attri))

        let row = self.tocOutlineView.selectedRow
        let column = self.tocOutlineView.tableColumn(withIdentifier: kLabelColumnId)
        let cell = column?.dataCell(forRow: row)
        (cell as? NSCell)?.objectValue = attriString
        let w = self.view.frame.size.width-86

        let num = self.getNum(ol)
        let gap = self.tocOutlineView.indentationPerLevel
        
        var rowH = ((cell as? NSCell)?.cellSize(forBounds: NSMakeRect(0, 0, w - (num > 0 ? 16 : 0) - gap * num.cgFloat, CGFloat.greatestFiniteMagnitude)).height) ?? 0
        rowH = fmax(rowH, self.tocOutlineView.rowHeight) + 25

        let view = self.tocOutlineView.view(atColumn: 0, row: row, makeIfNecessary: true)
        let frame = view?.frame ?? .zero
        view?.frame = NSMakeRect(frame.origin.x, frame.origin.y, frame.size.width, rowH)
        self.tocOutlineView.reloadData()
    }
    
    func getNum(_ ol: CPDFOutline?) -> Int {
        var num = 0
        var outline = ol?.parent
        repeat {
            outline = outline?.parent
            if outline != nil {
                num += 1
            }
        } while outline != nil
        return num
    }
    
    func addOutlineAfter(_ ol: CPDFOutline) {
        if self.leftView.segmentedControl.selectedSegment == 1 {
            
        } else {
            self.leftView.segmentedControl.selectedSegment = 1
        }
        
        Task { @MainActor in
            self.tocOutlineView.reloadData()
            let idx = self.tocOutlineView.row(forItem: ol)
            self.updatingOutlineSelection = true
            self.tocOutlineView.km_selectItem(ol, byExtendingSelection: false)
            self.updatingOutlineSelection = false
            self.newAddOutlineEntryEditingMode(idx)
        }

        DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
            self.tocOutlineView.scrollRowToVisible(self.tocOutlineView.row(forItem: ol))
        }
    }
    
    func removeOutlineAfter(_ ol: CPDFOutline) {
        Task { @MainActor in
            self.tocOutlineView.reloadData()
        }
    }
    
    func demoteOutlineAfter(_ ol: CPDFOutline) {
        Task { @MainActor in
            self.tocOutlineView.reloadData()
            self.tocOutlineView.expandItem(ol.parent)
            self.tocOutlineView.km_selectItem(ol, byExtendingSelection: false)
        }
    }
    
    func promoteOutlineAfter(_ ol: CPDFOutline) {
        Task { @MainActor in
            self.tocOutlineView.reloadData()
            self.tocOutlineView.km_selectItem(ol, byExtendingSelection: false)
        }
    }
    
    func showOutlineEmptyView() {
        let view = self.tocOutlineView.enclosingScrollView?.documentView
        let viewFrame = view?.frame ?? .zero
        let emptyVcSize =  self.leftSideEmptyVC.emptyOutlineView.frame.size
        self.leftSideEmptyVC.emptyOutlineView.frame = NSMakeRect((viewFrame.size.width-emptyVcSize.width)/2.0,(viewFrame.size.height-emptyVcSize.height)/2.0, emptyVcSize.width, emptyVcSize.height)
        self.leftSideEmptyVC.emptyOutlineView.autoresizingMask = [.minXMargin, .maxXMargin, .minYMargin, .maxYMargin]
        self.tocOutlineView.enclosingScrollView?.documentView?.addSubview(self.leftSideEmptyVC.emptyOutlineView)
        self.leftSideEmptyVC.deleteOutlineBtn.isEnabled = false
    }
    
    func hideOutlineEmptyView() {
        self.leftSideEmptyVC.emptyOutlineView.removeFromSuperview()
        self.leftSideEmptyVC.deleteOutlineBtn.isEnabled = true
    }
    
    func fetchOutlines(for ol: CPDFOutline, searchString: String) -> [CPDFOutline] {
        var ols: [CPDFOutline] = []
        for i in 0 ..< ol.numberOfChildren {
            guard let child = ol.child(at: i) else {
                continue
            }
            if self.hasContainString(searchString, rootOutline: child) {
                ols.append(child)
            }
        }
        return ols
    }
    
    @objc func goToSelectedOutlineItem(_ sender: AnyObject?) {
        let cnt = self.tocOutlineView.selectedRowIndexes.count
        if cnt == 0 || cnt > 1 {
            return
        }
        guard let item = self.tocOutlineView.selectedItem() else {
            return
        }
        if let bk = item as? CPDFBookmark {
            self.listView?.go(toPageIndex: bk.pageIndex, animated: true)
        } else if let ol = item as? CPDFOutline {
            if let dest = ol.destination {
                self.listView?.go(to: dest)
            } else if let act = ol.action {
                if !self.isFirst {
                    self.listView?.perform(act)
                }
            }
        }
        self.isFirst = false
    }
    
    public func refreshUIOfOutlineIfNeed() {
        if self.type.methodType != .Outline {
            return
        }
        Task { @MainActor in
            self.tocOutlineView.reloadData()
        }
    }
}

// MARK: - Undo & Redo

extension KMLeftSideViewController {
    @objc dynamic func changePDFOutlineDestination(_ destination: CPDFDestination?, PDFoutline outline: CPDFOutline) {
        if let des = destination {
            (self.listView?.undoManager?.prepare(withInvocationTarget: self) as AnyObject).changePDFOutlineDestination(outline.destination, PDFoutline: outline)
            let newDes = CPDFDestination(document: des.document, pageIndex: des.pageIndex, at: des.point, zoom: des.zoom)
            outline.destination = newDes
            
            self.tocOutlineView.reloadItem(outline)
        }
    }
    
    @objc dynamic func changePDFAction(_ action: CPDFAction?, PDFOutline outline: CPDFOutline) {
        (self.listView?.undoManager?.prepare(withInvocationTarget: self) as AnyObject).changePDFAction(outline.action, PDFOutline: outline)
        outline.action = action
    }
    
    @objc dynamic func renamePDFOutline(_ outline: CPDFOutline, label: String) {
        if (self.isRenameNoteOutline) {
            if outline is CPDFAnnotation {
//            if([outline isKindOfClass:[PDFAnnotation class]]) {
//                PDFAnnotation *annotation = (PDFAnnotation *)outline;
//                annotation.string = label;
//                [rightSideController.noteOutlineView reloadData];
//                [rightSideController.noteOutlineView selectRowIndexes:[[[NSIndexSet alloc] initWithIndex:[rightSideController.noteOutlineView rowForItem:outline]] autorelease] byExtendingSelection:NO];
            }
        } else {
            (self.listView?.undoManager?.prepare(withInvocationTarget: self) as AnyObject).renamePDFOutline(outline, label: outline.label)
            outline.label = label
            self.tocOutlineView.reloadData()
            self.tocOutlineView.km_selectItem(outline, byExtendingSelection: false)
        }
    }
    
    @objc dynamic func addoutline(parent parentOutline: CPDFOutline?, addOutline: CPDFOutline, index: Int, needExpand: Bool) {
        var tempO: CPDFOutline? = addOutline
        if addOutline.label != nil {
            parentOutline?.insertChild(addOutline, at: UInt(index))
        } else {
            let outline = parentOutline?.km_insertChild(label: String(format: "%@ %ld", KMLocalizedString("Page", nil), self.currentPageIndex()+1), dest: self.currentDestination(), at: index)
            tempO = outline
        }
        
        guard let outline = tempO else {
            return
        }
        
        (self.listView?.undoManager?.prepare(withInvocationTarget: self) as AnyObject).removeOutline(parent: parentOutline, removeOutline: outline, index: index, needExpand: needExpand)
        self.view.window?.makeFirstResponder(nil)

        Task { @MainActor in
            self.tocOutlineView.reloadData()
            
            if (needExpand) {
                self.tocOutlineView.expandItem(parentOutline)
            }
            let idx = self.tocOutlineView.row(forItem: outline)
            self.tocOutlineView.selectRowIndexes(IndexSet(integer: idx), byExtendingSelection: false)
            
            self.newAddOutlineEntryEditingMode(index)
        }

        DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
            self.tocOutlineView.scrollRowToVisible(self.tocOutlineView.row(forItem: outline))
        }
    }
    
    @objc dynamic func removeOutline(parent parentOutline: CPDFOutline?, removeOutline: CPDFOutline, index: Int, needExpand: Bool) {
        (self.listView?.undoManager?.prepare(withInvocationTarget: self) as AnyObject).addoutline(parent: parentOutline, addOutline: removeOutline, index: index, needExpand: true)
        removeOutline.removeFromParent()
        if (needExpand) {
            self.tocOutlineView.expandItem(parentOutline)
        }
        Task { @MainActor in
            self.tocOutlineView.reloadData()
        }
    }
    
    @objc dynamic func dragPDFOutline(_ outline: CPDFOutline?, toIndex index: Int, newParentOutline: CPDFOutline?) {
        guard let doc = self.view.window?.windowController?.document as? NSDocument else {
            NSSound.beep()
            return
        }
        if outline == nil {
            NSSound.beep()
            return
        }
        (doc.undoManager?.prepare(withInvocationTarget: self) as AnyObject).dragPDFOutline(outline, toIndex: Int(outline!.index), newParentOutline: outline?.parent)
        outline?.removeFromParent()
        newParentOutline?.insertChild(outline, at: UInt(index))
        self.tocOutlineView.reloadData()
        self.tocOutlineView.expandItem(newParentOutline)
        self.tocOutlineView.selectRowIndexes(IndexSet(integer: self.tocOutlineView.row(forItem: outline)), byExtendingSelection: false)
    }
}

// MARK: - Menu Actions

extension KMLeftSideViewController {
    func outlineListMenu(_ menu: NSMenu) {
        _ = menu.addItem(withTitle: NSLocalizedString("Add Item", comment: ""), action: #selector(outlineContextMenuItemClicked_AddEntry), target: self, tag: KMOutlineViewMenuItemTag.addEntry.rawValue)
        _ = menu.addItem(withTitle: NSLocalizedString("Add Sub-Item", comment: ""), action: #selector(outlineContextMenuItemClicked_AddChildEntry), target: self, tag: KMOutlineViewMenuItemTag.addChild.rawValue)
        _ = menu.addItem(withTitle: NSLocalizedString("Add To A Higher Level", comment: ""), action: #selector(outlineContextMenuItemClicked_AddAuntEntry), target: self, tag: KMOutlineViewMenuItemTag.addAunt.rawValue)
        menu.addItem(.separator())
        _ = menu.addItem(withTitle: NSLocalizedString("Delete", comment: ""), action: #selector(outlineContextMenuItemClicked_RemoveEntry), target: self, tag: KMOutlineViewMenuItemTag.remove.rawValue)
        menu.addItem(.separator())
        _ = menu.addItem(withTitle: NSLocalizedString("Edit", comment: ""), action: #selector(outlineContextMenuItemClicked_Edit), target: self, tag: KMOutlineViewMenuItemTag.edit.rawValue)
        _ = menu.addItem(withTitle: NSLocalizedString("Change Destination", comment: ""), action: #selector(outlineContextMenuItemClicked_SetDestination), target: self, tag: KMOutlineViewMenuItemTag.setDestination.rawValue)
        _ = menu.addItem(withTitle: NSLocalizedString("Rename", comment: ""), action: #selector(outlineContextMenuItemClicked_Rename), target: self, tag: KMOutlineViewMenuItemTag.rename.rawValue)
        menu.addItem(.separator())
        _ = menu.addItem(withTitle: NSLocalizedString("Promote", comment: ""), action: #selector(outlineContextMenuItemClicked_Promote), target: self, tag: KMOutlineViewMenuItemTag.promote.rawValue)
        _ = menu.addItem(withTitle: NSLocalizedString("Demote", comment: ""), action: #selector(outlineContextMenuItemClicked_Demote), target: self, tag: KMOutlineViewMenuItemTag.demote.rawValue)
    }
    
    func outlineMoreMenu(_ view: NSButton) {
        let menu = NSMenu()
        let expandAllItem = menu.addItem(title: KMLocalizedString("Expand All", nil), action: #selector(toc_expandAllComments), target: self)
        expandAllItem?.representedObject = self.tocOutlineView

        let foldAllItem = menu.addItem(title: KMLocalizedString("Collapse All", nil), action: #selector(toc_foldAllComments), target: self)
        foldAllItem?.representedObject = self.tocOutlineView
        let rootOL = self.outlineRoot()
        let childNum = rootOL?.numberOfChildren ?? 0

        var num = 0
        for i in 0 ..< childNum {
            let ol = rootOL?.child(at: i)
            if self.tocOutlineView.isItemExpanded(ol) {
                num += 1
            }
        }

        self.tocType = .none
        if childNum > 0 {
            if num == 0 {
                self.tocType = .fold
            } else if num == childNum {
                self.tocType = .unfold
            }
        }

        expandAllItem?.state = self.tocType == .unfold ? .on : .off
        foldAllItem?.state = self.tocType == .fold ? .on : .off

        let removeEntryItem = menu.addItem(title: KMLocalizedString("Remove All Outlines", nil), action: #selector(leftSideEmptyAnnotationClick_DeleteOutline), target: self)
        removeEntryItem?.representedObject = self.tocOutlineView
        if let data = NSApp.currentEvent {
            NSMenu.popUpContextMenu(menu, with: data, for: view)
        }
    }
    
    func outlineListValidateMenuItem(_ menuItem: NSMenuItem) -> Bool {
        if self.isLocked() {
            return false
        }
        let action = menuItem.action
        if (action == #selector(leftSideEmptyAnnotationClick_DeleteOutline)) {
            guard let rootOL = self.outlineRoot() else {
                return false
            }
            let childNum = rootOL.numberOfChildren
            if (self.isSearchOutlineMode) {
                let ols = self.fetchOutlines(for: rootOL, searchString: self.outlineSearchField.stringValue)
                return ols.count > 0
            } else {
                return childNum > 0
            }
        } else if action == #selector(toggleOutlineCaseInsensitiveSearch) {
            menuItem.state = self.outlineIgnoreCaseFlag ? .on : .off
            return true
        }
       
        if (self.isSearchOutlineMode) {
            if (action == #selector(outlineContextMenuItemClicked_AddEntry) ||
                action == #selector(outlineContextMenuItemClicked_AddChildEntry) ||
                action == #selector(outlineContextMenuItemClicked_AddAuntEntry) ||
                action == #selector(outlineContextMenuItemClicked_Edit) ||
                action == #selector(outlineContextMenuItemClicked_Rename)
                ) {
                return false
            }
        }
        if (self.tocOutlineView.selectedRowIndexes.count > 1) {
            if (menuItem.tag == KMOutlineViewMenuItemTag.remove.rawValue) {
                return true
            }
            return false
        } else if (self.tocOutlineView.selectedRowIndexes.count > 0) {
            if (action == #selector(outlineContextMenuItemClicked_AddChildEntry) ||
                action == #selector(outlineContextMenuItemClicked_SetDestination)) {
                return true
            }
        }
        if (self.tocOutlineView.clickedRow == -1) {
            if (action == #selector(outlineContextMenuItemClicked_AddEntry)) {
                return true
            } else {
                return false
            }
        } else {
            let clickedOutline = self.tocOutlineView.item(atRow: self.tocOutlineView.clickedRow) as? CPDFOutline
            if (action == #selector(outlineContextMenuItemClicked_Demote)) {
                if let data = clickedOutline {
                    return self.pdfDocument()?.canDemote(outline: data) ?? false
                }
                return false
            }
            if (action == #selector(outlineContextMenuItemClicked_Promote)) {
                if let data = clickedOutline {
                    return self.pdfDocument()?.canPromote(outline: data) ?? false
                } else {
                    return false
                }
            }
            if (action == #selector(outlineContextMenuItemClicked_AddAuntEntry)) {
                let parentOutLine = clickedOutline?.parent
                let grandparentOutLine = parentOutLine?.parent
                if (grandparentOutLine != nil) {
                    return true
                } else {
                    return false
                }
            }
        }
        return true
    }
    
    //添加子节点
    
    @objc func outlineContextMenuItemClicked_AddChildEntry(_ sender: AnyObject?) {
        guard let row = self.selectedRowIndexes().last else {
            return
        }
        let item = self.tocOutlineView.item(atRow: row) as? CPDFOutline
        let ol = CPDFOutline()
        ol.label = String(format: "%@ %ld", KMLocalizedString("Page", nil), "\(self.currentPageIndex() + 1)")
        ol.destination = self.currentDestination()
        self.addoutline(parent: item, addOutline: ol, index: Int(item?.numberOfChildren ?? 0), needExpand: true)
    }
    
    //添加上一级节点
    
    @objc func outlineContextMenuItemClicked_AddAuntEntry(_ sender: AnyObject?) {
        guard let row = self.selectedRowIndexes().last else {
            return
        }
        let item = self.tocOutlineView.item(atRow: row) as? CPDFOutline
        let parentOL = item?.parent
        if parentOL?.parent != nil {
            let ol = CPDFOutline()
            ol.label = String(format: "%@ %ld", KMLocalizedString("Page", nil), "\(self.currentPageIndex() + 1)")
            ol.destination = self.currentDestination()
            self.addoutline(parent: parentOL?.parent, addOutline: ol, index: Int(parentOL?.index ?? 0) + 1, needExpand: false)
        }
    }
    
    //移除节点
    
    @objc func outlineContextMenuItemClicked_RemoveEntry(_ sender: AnyObject?) {
        for idx in self.selectedRowIndexes() {
            let item = self.tocOutlineView.item(atRow: idx)
            if let ol = item as? CPDFOutline {
                self.removeOutline(parent: ol.parent , removeOutline: ol, index: Int(ol.index), needExpand: false)
            }
        }
    }
    
    //重置目的
    
    @objc func outlineContextMenuItemClicked_SetDestination(_ sender: AnyObject?) {
        guard let ol = self.tocOutlineView.clickedItem() as? CPDFOutline else {
            return
        }
        Task {
            let res = await KMAlertTool.runModel(style: .informational, message: KMLocalizedString("Are you sure you want to set the destination as the current location?", nil), buttons: [KMLocalizedString("Yes", nil), KMLocalizedString("No", nil)])
            if (res == .alertFirstButtonReturn) {
                self.changePDFOutlineDestination(self.currentDestination(), PDFoutline: ol)
                let idx = self.tocOutlineView.row(forItem: ol)
                self.tocOutlineView.km_safe_selectRowIndexes(.init(integer: idx), byExtendingSelection: false)
            }
        }
    }
    
    //弹出菜单
    
    @objc func outlineContextMenuItemClicked_Edit(_ sender: AnyObject?) {
        let popover = NSPopover()
        popover.delegate = self
        let ol: CPDFOutline? = self.tocOutlineView.km.clickedItem()
        let vc = KMOutlineEditViewController(outline: ol, document: self.listView)
        if let cell = self.tocOutlineView.rowView(atRow: self.tocOutlineView.clickedRow, makeIfNecessary: true) {
            popover.contentViewController = vc
            popover.animates = true
            popover.behavior = .transient
            popover.show(relativeTo: cell.bounds, of: cell, preferredEdge: .minX)
        }
    }
    
    //重命名
    
    @objc func outlineContextMenuItemClicked_Rename(_ sender: AnyObject?) {
        if (self.tocOutlineView.clickedRow < 0) {
            return
        }
        
        self.renamePDFOutline = self.tocOutlineView.km.clickedItem()
        let cell = self.tocOutlineView.view(atColumn: 0, row: self.tocOutlineView.clickedRow, makeIfNecessary: true)
        let tf = cell?.subviews.first as? NSTextField
        self.renamePDFOutlineTextField = tf
        tf?.delegate = self
        tf?.isEditable = true
        tf?.becomeFirstResponder()
    }
    
    //降级节点
    
    @objc func outlineContextMenuItemClicked_Demote(_ sender: AnyObject?) {
        self.delegate?.controller?(controller: self, itemClick: sender, itemKey: .demote, params: nil)
    }
    
    //升级节点
    
    @objc func outlineContextMenuItemClicked_Promote(_ sender: AnyObject?) {
        self.delegate?.controller?(controller: self, itemClick: sender, itemKey: .promote, params: nil)
    }
    
    @objc func toggleOutlineCaseInsensitiveSearch(_ sender: NSMenuItem) {
        if (sender.state == .on) {
            self.outlineIgnoreCaseFlag = false
        } else {
            self.outlineIgnoreCaseFlag = true
        }
        if (self.outlineSearchField.stringValue.isEmpty == false) {
            self.tocOutlineView.reloadData()
            self.tocOutlineView.expandItem(nil, expandChildren: true)
        }
    }
}

// MARK: - KMTocOutlineViewDelegate

extension KMLeftSideViewController: KMTocOutlineViewDelegate {
    func outlineView(_ anOutlineView: NSOutlineView, highlightLevelForRow row: Int) -> Int {
        if self.tocOutlineView.isEqual(to: anOutlineView) {
            let numRows = anOutlineView.numberOfRows
            if let outline = anOutlineView.item(atRow: row) as? CPDFOutline {
                let firstPage = outline.km_pageIndex
                var lastPage = self.pageCount()
                if row + 1 < numRows {
                    lastPage = Int((anOutlineView.item(atRow: row + 1) as? CPDFOutline)?.km_pageIndex ?? UInt(NSNotFound))
                }
                //            NSRange range = NSMakeRange(firstPage, MAX(1LU, lastPage - firstPage));
                //            NSUInteger i, iMax = [lastViewedPages count];
                //            for (i = 0; i < iMax; i++) {
                //                if (NSLocationInRange((NSUInteger)[lastViewedPages pointerAtIndex:i], range))
                //                    return i;
                //            }
            }
        }
        return NSNotFound
    }
    
    func outlineView(_ anOutlineView: NSOutlineView, imageContextForItem item: Any?) -> AnyObject? {
        if anOutlineView.isEqual(to: self.tocOutlineView) {
            if item == nil {
                return true as AnyObject
            }
            if item is CPDFOutline {
                return (item as! CPDFOutline).destination
            }
        }
        return nil
    }
}

extension KMLeftSideViewController: KMNoteOutlineViewDelegate {
    func outlineView(_ anOutlineView: NSOutlineView, canResizeRowByItem item: AnyObject?) -> Bool? {
        if anOutlineView.isEqual(to: self.noteOutlineView) {
            return true
        }
        return false
    }
    
    func outlineView(_ anOutlineView: NSOutlineView, setHeight newHeight: CGFloat, ofRowByItem item: AnyObject?) {
//        [rowHeights setFloat:newHeight forKey:item];
    }
    
    func outlineView(_ anOutlineView: NSOutlineView, didChangeHiddenOfTableColumn aTableColumn: NSTableColumn) {
//            if (mwcFlags.autoResizeNoteRows &&
//                [ov isEqual:rightSideController.noteOutlineView] &&
//                [[tableColumn identifier] isEqualToString:NOTE_COLUMNID]) {
//                [rowHeights removeAllFloats];
//                [rightSideController.noteOutlineView noteHeightOfRowsWithIndexesChanged:[NSIndexSet indexSetWithIndexesInRange:NSMakeRange(0, [rightSideController.noteOutlineView numberOfRows])]];
//            }
    }
    
    func outlineViewCommandKeyPressedDuringNavigation(_ anOutlineView: NSOutlineView) {
//            PDFAnnotation *annotation = [[self selectedNotes] lastObject];
//            if (annotation) {
//                [pdfView scrollAnnotationToVisible:annotation];
//                [pdfView setActiveAnnotation:annotation];
//            }
    }
    
    
}