//
//  KMCloudDocumentsViewController.swift
//  PDF Master
//
//  Created by wanjun on 2022/11/23.
//

import Cocoa

enum KMCloudDocumentState : Int {
    case Box = 0
    case DropBox
    case GoogleDrive
    case OneDrive
    
    public func string() -> String {
        switch self {
        case .Box:
            return "Box"
        case .DropBox:
            return "DropBox"
        case .GoogleDrive:
            return "GoogleDrive"
        case .OneDrive:
            return "OneDrive"
        }
    }
}

class KMCloudAccountListTableviewCell: NSTableCellView {
    @IBOutlet weak var accountLabel: NSTextField!
}

class KMCloudFileNameListTableviewCell: NSTableCellView {
    @IBOutlet weak var fileImageView: NSImageView!
    @IBOutlet weak var titleLabel: NSTextField!
    @IBOutlet weak var subtitleLabel: NSTextField!
}

class KMCloudFileModifyTimeListTableviewCell: NSTableCellView {
    @IBOutlet weak var modifyTimeLabel: NSTextField!
}

class KMCloudFileSizeListTableviewCell: NSTableCellView {
    @IBOutlet weak var sizeLabel: NSTextField!
}

class KMCloudDocumentsViewController: NSViewController {
    
    @IBOutlet weak var topBox: NSBox!
    @IBOutlet weak var cloudDocumentsLabel: NSTextField!
    @IBOutlet weak var addCloudsBox: KMBox!
    @IBOutlet weak var addCloudsLabel: NSTextField!
    @IBOutlet weak var addCloudsImageView: NSImageView!
    @IBOutlet weak var mainBox: NSBox!
    @IBOutlet weak var emptyScrollView: NSScrollView!
    @IBOutlet weak var emptyCollectionView: KMCollectionView!
    @IBOutlet weak var cloudSplitView: NSSplitView!
    @IBOutlet weak var cloudLeftBox: NSBox!
    @IBOutlet weak var cloudRightBox: NSBox!
    @IBOutlet weak var accountListTableView: NSTableView!
    @IBOutlet weak var fileListTableView: KMMenuTableView!
    @IBOutlet weak var fileNameTableColumn: NSTableColumn!
    @IBOutlet weak var fileModifyTimeTableColumn: NSTableColumn!
    @IBOutlet weak var fileSizeTableColumn: NSTableColumn!
    
    @IBOutlet weak var pathControl: NSPathControl!
    
    @IBOutlet weak var pathBox: NSBox!
    var myPathControl = KMCloudPathControl()
    var pathString: String = ""
    
    var cloudPlates: [KMCloudDocumentState] = [.DropBox, .GoogleDrive]
    var accounts: [Any] = []
    var cloudFiles: [Any] = []
    var currentAccount: KMCloudServer?
    var filepaths: [KMServicesCloudFile] = []

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do view setup here.
        
        let serverArr = KMCloudServer.getAllLoginServer()
        for server in serverArr! {
            self.accounts.append(server)
        }
        emptyCollectionView.register(KMCloudEmptyCollectionViewItem.self, forItemWithIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMCloudEmptyCollectionViewItem"))
        emptyCollectionView.isSelectable = true
        self.fileListTableView.menuDelegate = self
        
        initializeUI()
        initLocalization()
        
        self.pathControl.url = URL(fileURLWithPath: "Cloud Documents\\Test\\Test2")
        self.pathControl.pathStyle = .popUp
        
        addCloudsBox.downCallback = { [weak self](downEntered: Bool, mouseBox: KMBox, event) -> Void in
            if self != nil {
                if downEntered {
                    self!.addCloudsAction()
                }
            }
        }
    }
    
    override func viewDidAppear() {
        super.viewDidAppear()
        
        reloadData()
    }
    
    override func viewWillLayout() {
        super.viewWillLayout()
        
        if (self.emptyCollectionView.isHidden == false) {
            self.emptyCollectionView.reloadData()
        }
    }
    
    // MARK: Init

    func initializeUI() -> Void {
        let menu = NSMenu()
        let item = NSMenuItem(title: NSLocalizedString("Delete", comment: ""), action: #selector(accountListTableView_itemClick), target: self)
        menu.addItem(item!)
        self.accountListTableView.menu = menu
        self.accountListTableView.allowsEmptySelection = false
        
        self.fileListTableView.doubleAction = #selector(fileListTableViewDoubleAction)
        
        let pathControl = self.myPathControl
        self.pathBox.contentView?.addSubview(pathControl)
        pathControl.frame = self.pathBox.contentView!.bounds
        pathControl.autoresizingMask = [.width, .height]
        self.pathString = NSLocalizedString("Cloud Documents", comment: "")
        pathControl.urlString = self.pathString
        pathControl.itemClick = { [weak self] index in
            if (index == 0) {
                self!.updateFilesList((self?.currentAccount)!, nil)
            } else {
                self!.updateFilesList((self?.currentAccount)!, self?.filepaths[index-1])
            }
        }
    }
    
    func initLocalization() -> Void {
        cloudDocumentsLabel.stringValue = NSLocalizedString("Cloud Documents", comment: "")
        addCloudsLabel.stringValue = NSLocalizedString("Add Account", comment: "")
        addCloudsBox.toolTip = NSLocalizedString("Add Account", comment: "")
        
        fileNameTableColumn.title = NSLocalizedString("File Name", comment: "")
        fileModifyTimeTableColumn.title = NSLocalizedString("Change time", comment: "")
        fileSizeTableColumn.title = NSLocalizedString("Size", comment: "")
    }
    
    // MARK: private
    
    func reloadData() -> Void {
        DispatchQueue.main.async {
            if (KMCloudServer.isConnectionAvailable()) {
                self.hiddenNotNetworkView()
                
                self.emptyCollectionView.isHidden = true
                self.cloudSplitView.isHidden = true
                if self.accounts.count > 0 {
                    self.cloudSplitView.isHidden = false
                    
                    self.accountListTableView.reloadData()
                    self.fileListTableView.reloadData()
                } else {
                    self.emptyCollectionView.isHidden = false

                    self.emptyCollectionView.reloadData()
                }
            } else {
                self.showNotNetworkView()
            }
        }
    }

    // MARK: Action
    
    func loginCloud(state: KMCloudDocumentState) -> Void {
        switch state {
        case .Box:
           break
        case .DropBox:
            let serverArray = KMCloudServer.getAllLoginServer()
            var dropboxIsLogin: Bool = false
            for server in serverArray! {
                if (server.serverType == KMDropbox) {
                    dropboxIsLogin = true
                    break
                }
            }

            if (dropboxIsLogin) {
                self.logoutAccount(self.currentAccount!)
            } else {
                let server = KMCloudServer(cloudWith: KMDropbox)
                server?.authorizedLoginCompletion({ cloudFiles, finished in
                    if (!finished) { /// 登录失败
                        return
                    }
                    let serverArr = KMCloudServer.getAllLoginServer()
                    var currentServer: KMCloudServer?
                    for server in serverArr! {
                        if ((server as! KMCloudServer).serverType == KMDropbox) {
                            currentServer = server
                            break
                        }
                    }
//                    let userData: KMDropboxUserMetadata = cloudFiles as! KMDropboxUserMetadata
                    if (currentServer != nil) {
                        self.accounts.append(currentServer)
                        self.reloadData()
                    }
                })
            }
            break
        case .GoogleDrive:
            let serverArray = KMCloudServer.getAllLoginServer()
            var isLogin: Bool = false
            for server in serverArray! {
                if (server.serverType == KMGoogleDrive) {
                    isLogin = true
                    break
                }
            }


            if (isLogin) {
                self.logoutAccount(self.currentAccount!)
            } else {
                let server = KMCloudServer(cloudWith: KMGoogleDrive)
                server?.authorizedLoginCompletion({ cloudFiles, finished in
                    if (!finished) { /// 登录失败
                        return
                    }
                    let serverArr = KMCloudServer.getAllLoginServer()
                    var currentServer: KMCloudServer?
                    for server in serverArr! {
                        if ((server as! KMCloudServer).serverType == KMGoogleDrive) {
                            currentServer = server
                            break
                        }
                    }
//                    let userData: KMDropboxUserMetadata = cloudFiles as! KMDropboxUserMetadata
                    if (currentServer != nil) {
                        self.accounts.append(currentServer)
                        self.reloadData()
                    }
                })
            }
            break
        case .OneDrive:
            break
        }
    }
    
    func addCloudsAction() -> Void {
        var popViewDataArr: [String] = []
        for plate in self.cloudPlates {
            popViewDataArr.append(plate.string())
        }
        let vc: KMHomePopViewController = KMHomePopViewController().initWithPopViewDataArr(popViewDataArr)
        let createFilePopover: NSPopover = NSPopover.init()
        createFilePopover.contentViewController = vc
        createFilePopover.animates = true
        createFilePopover.behavior = .transient
        createFilePopover.setValue(true, forKey: "shouldHideAnchor")
        createFilePopover.show(relativeTo: CGRect(x: addCloudsBox.bounds.origin.x, y: 10, width: addCloudsBox.bounds.size.width, height: addCloudsBox.bounds.size.height), of: addCloudsBox, preferredEdge: .minY)
        
        vc.downCallback = { [weak self](downEntered: Bool, count: String) -> Void in
            if self != nil {
                if downEntered {
                    var state: KMCloudDocumentState = .Box
                    if count == NSLocalizedString("Box", comment: "") {
                        state = .Box
                    } else if count == NSLocalizedString("DropBox", comment: "") {
                        state = .DropBox
                    } else if count == NSLocalizedString("GoogleDrive", comment: "") {
                        state = .GoogleDrive
                    } else if count == NSLocalizedString("OneDrive", comment: "") {
                        state = .OneDrive
                    }
                    self!.loginCloud(state: state)
                }
            }
        }
    }
    
    private func showNotNetworkView() {
        self.hiddenNotNetworkView()
        
        self.emptyCollectionView.isHidden = true
        self.cloudSplitView.isHidden = true
        
        let superview = self.emptyCollectionView.superview
        
        let view = KMCloudNoNetworkView()
        let viewH: CGFloat = 220
        view.frame = NSMakeRect(0, (NSHeight(superview!.bounds)-viewH)*0.5, (superview?.bounds.size.width)!, viewH)
        view.autoresizingMask = [.width, .minYMargin]
        superview?.addSubview(view)
        
        view.itemClick = { [weak self] index in
            /// 刷新
            self?.hiddenNotNetworkView()
            self?.reloadData()
        }
    }
    
    private func hiddenNotNetworkView() {
        let superview = self.emptyCollectionView.superview
        var flagView: KMCloudNoNetworkView?
        for view in superview!.subviews {
            if (view is KMCloudNoNetworkView) {
                flagView = (view as! KMCloudNoNetworkView)
                break
            }
        }
        
        if (flagView == nil) {
            return
        }
        
        flagView?.removeFromSuperview()
    }
    
    private func showCloudFileEmptyView() {
        self.hiddenCloudFileEmptyView()
        
        let superview = self.fileListTableView.enclosingScrollView?.superview
        self.fileListTableView.enclosingScrollView!.isHidden = true
        
        let view = KMCloudFileEmptyView()
        let viewH: CGFloat = 220
        view.frame = NSMakeRect(0, (NSHeight(superview!.bounds)-viewH)*0.5, (superview?.bounds.size.width)!, viewH)
        view.autoresizingMask = [.width, .minYMargin]
        superview?.addSubview(view)
    }
    
    private func hiddenCloudFileEmptyView() {
        let superview = self.fileListTableView.enclosingScrollView?.superview
        self.fileListTableView.enclosingScrollView!.isHidden = false
        var flagView: KMCloudFileEmptyView?
        for view in superview!.subviews {
            if (view is KMCloudFileEmptyView) {
                flagView = (view as! KMCloudFileEmptyView)
                break
            }
        }
        
        if (flagView == nil) {
            return
        }
        
        flagView?.removeFromSuperview()
    }
    
    @objc func accountListTableView_itemClick(sender: NSMenuItem) {
        if (self.accountListTableView.selectedRow < self.accounts.count) {
            self.logoutAccount(self.accounts[self.accountListTableView.selectedRow] as! KMCloudServer)
        }
    }
    
    @objc func openFileMenuClick(sender: NSMenuItem) {
        if (self.currentAccount == nil) {
            return
        }
        
        let file: KMServicesCloudFile = self.cloudFiles[sender.tag] as! KMServicesCloudFile
        self.fileListBeginLoading()
        KMCloudDocumentTools.downloadDocument(self.currentAccount!, file) { finished, fileUrl in
            self.fileListEndLoading()
            if (finished) {
                if !fileUrl.path.isPDFValid() {
                    let alert = NSAlert()
                    alert.alertStyle = .critical
                    alert.messageText = NSLocalizedString("An error occurred while opening this document. The file is damaged and could not be repaired.", comment: "")
                    alert.runModal()
                    return
                }
                NSDocumentController.shared.openDocument(withContentsOf: fileUrl, display: true) { document, result, error in
                    if error != nil {
                        NSApp.presentError(error!)
                        return
                    }
                    (document as! KMMainDocument).cloud = true
                    (document as! KMMainDocument).cloudUploadHanddler = { callback in
                        KMCloudDocumentTools.uploadDocument(self.currentAccount!, file) { finished, fileUrl in
                            callback(finished, "")
                        }
                    }
                }
            }
        }
    }
    
    @objc func openFolderMenuClick(sender: NSMenuItem) {
        if (self.currentAccount == nil) {
            return
        }
        
        let file: KMServicesCloudFile = self.cloudFiles[sender.tag] as! KMServicesCloudFile
        self.updateFilesList(self.currentAccount!, file)
    }
    
    @objc func fileListTableViewDoubleAction(sender: Any) {
        let indexs = self.fileListTableView.selectedRowIndexes
        for index in indexs {
            let file: KMServicesCloudFile = self.cloudFiles[index] as! KMServicesCloudFile
            if (file.filetype == .file) {
                if (self.currentAccount == nil) {
                    continue
                }

                if (!KMCloudDocumentTools.canOpenDocument(file)) {
                    continue
                }
                self.fileListBeginLoading()
                KMCloudDocumentTools.downloadDocument(self.currentAccount!, file) { finished, fileUrl in
                    self.fileListEndLoading()
                    if (finished) {
                        NSDocumentController.shared.openDocument(withContentsOf: fileUrl, display: true) { document, result, error in
                            if error != nil {
                                NSApp.presentError(error!)
                                return
                            }
                            (document as! KMMainDocument).cloud = true
                            (document as! KMMainDocument).cloudUploadHanddler = { callback in
                                KMCloudDocumentTools.uploadDocument(self.currentAccount!, file) { finished, fileUrl in
                                    callback(finished, "")
                                }
                            }
                        }
                    }
                }
            } else {
                if (self.currentAccount == nil) {
                    continue
                }

                self.updateFilesList(self.currentAccount!, file)
            }
        }
    }
    
    private func logoutAccount(_ account: KMCloudServer) {
        DispatchQueue.main.async {
            let alert = NSAlert()
            alert.messageText = NSLocalizedString("Are you Sure Delete“\(account.userEmail!)”?", comment: "")
            alert.addButton(withTitle: NSLocalizedString("Delete", comment: ""))
            alert.addButton(withTitle: NSLocalizedString("Cancel", comment: ""))
            let response = alert.runModal()
            if (response == .alertSecondButtonReturn) { /// 取消
                return
            }
            account.authorizedLogoutCompletion({ [weak self] finished in
                if (!finished) {
                    return
                }

                var i: Int = 0
                for account_ in self!.accounts {
                    if ((account_ as! KMCloudServer).serverType == account.serverType) {
                        break
                    }
                    i += 1
                }
                self!.accounts.remove(at: i)
                self!.cloudFiles.removeAll()
                self!.reloadData()
            })
        }
    }
    
    private func updateFilesList(_ server: KMCloudServer, _ file: KMServicesCloudFile?) {
        self.myPathControl.enabled = false
        self.fileListBeginLoading()
        server.getListWithFilePath(file) { [weak self] fileList, serviceType, error in
            if (error != nil) {
                self!.myPathControl.enabled = true
                return
            }

            if (fileList == nil) {
                self!.myPathControl.enabled = true
                return
            }

            if (file == nil) { /// 切换账号
                self?.filepaths.removeAll()
                self?.currentAccount = server
            } else {
                let index = self?.filepaths.firstIndex(of: file!)
                if (index == nil) {
                    self?.filepaths.append(file!)
                } else {
                    let count = self?.filepaths.count
                    for i in 0 ..< count! {
                        if (i <= index!) {
                            continue
                        }
                        self?.filepaths.remove(at: i)
                    }
                }
            }
            
            self!.pathString = NSLocalizedString("Cloud Documents", comment: "")
            for filepath in self!.filepaths {
                self!.pathString = self!.pathString.appending("\\\(filepath.fileName!)")
            }
            self!.myPathControl.urlString = self?.pathString
            
            self?.cloudFiles.removeAll()
            for file in fileList! {
                self?.cloudFiles.append(file)
            }

            /// 排序
            self?.cloudFiles.sort(by: { file1, file2 in
                if ((file1 as! KMServicesCloudFile).filetype == .file) {
                    if ((file2 as! KMServicesCloudFile).filetype == .file) {
                        return (file1 as! KMServicesCloudFile).fileName.caseInsensitiveCompare((file2 as! KMServicesCloudFile).fileName) == .orderedAscending
                    } else {
                        return false
                    }
                } else {
                    if ((file2 as! KMServicesCloudFile).filetype == .file) {
                        return true
                    } else {
                        return (file1 as! KMServicesCloudFile).fileName.caseInsensitiveCompare((file2 as! KMServicesCloudFile).fileName) == .orderedAscending
                    }
                }
            })

            DispatchQueue.main.async {
                self?.fileListTableView.reloadData()

                if (self?.cloudFiles.count == 0) {
                    self?.showCloudFileEmptyView()
                } else {
                    self?.hiddenCloudFileEmptyView()
                }
                self!.myPathControl.enabled = true
                self?.fileListEndLoading()
            }
        }
    }
    
    private func fileListBeginLoading() {
        self.fileListTableView.enclosingScrollView?.superview!.beginLoading()
    }
    
    private func fileListEndLoading() {
        self.fileListTableView.enclosingScrollView?.superview?.endLoading()
    }
}

// MARK: - NSSplitViewDelegate

extension KMCloudDocumentsViewController: NSSplitViewDelegate {
    func splitView(_ splitView: NSSplitView, constrainMinCoordinate proposedMinimumPosition: CGFloat, ofSubviewAt dividerIndex: Int) -> CGFloat {
        return 170.0
    }
    
    func splitView(_ splitView: NSSplitView, constrainMaxCoordinate proposedMaximumPosition: CGFloat, ofSubviewAt dividerIndex: Int) -> CGFloat {
        return 170.0
    }
    
    func splitView(_ splitView: NSSplitView, shouldAdjustSizeOfSubview view: NSView) -> Bool {
        return false
    }
    
    func splitViewDidResizeSubviews(_ notification: Notification) {
        let rect = self.cloudSplitView.frame
        self.cloudLeftBox.setFrameSize(CGSize(width: 170, height: rect.size.height))
        
        self.cloudRightBox.frame = CGRect(origin: CGPoint(x: 171.0, y: 0), size: CGSize(width: rect.width - 171.0, height: rect.height))
    }
    
    func splitView(_ splitView: NSSplitView, constrainSplitPosition proposedPosition: CGFloat, ofSubviewAt dividerIndex: Int) -> CGFloat {
        return proposedPosition
    }
    
    func splitView(_ splitView: NSSplitView, canCollapseSubview subview: NSView) -> Bool {
        return false
    }
    
    func splitView(_ splitView: NSSplitView, shouldCollapseSubview subview: NSView, forDoubleClickOnDividerAt dividerIndex: Int) -> Bool {
        return false
    }
    
    func splitView(_ splitView: NSSplitView, shouldHideDividerAt dividerIndex: Int) -> Bool {
        return splitView.isEqual(to: self.cloudSplitView)
    }
    
    func splitView(_ splitView: NSSplitView, effectiveRect proposedEffectiveRect: NSRect, forDrawnRect drawnRect: NSRect, ofDividerAt dividerIndex: Int) -> NSRect {
        return proposedEffectiveRect
    }
    
    func splitView(_ splitView: NSSplitView, additionalEffectiveRectOfDividerAt dividerIndex: Int) -> NSRect {
        return NSMakeRect(0, 0, 0, 0)
    }
}

// MARK: - NSCollectionViewDataSource

extension KMCloudDocumentsViewController: NSCollectionViewDataSource {
    func collectionView(_ collectionView: NSCollectionView, numberOfItemsInSection section: Int) -> Int {
        if collectionView.isEqual(to: emptyCollectionView) {
            return self.cloudPlates.count
        }
        return 0
    }
    
    func collectionView(_ collectionView: NSCollectionView, itemForRepresentedObjectAt indexPath: IndexPath) -> NSCollectionViewItem {
        if collectionView.isEqual(to: emptyCollectionView) {
            let item: KMCloudEmptyCollectionViewItem = collectionView.makeItem(withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMCloudEmptyCollectionViewItem"), for: indexPath) as! KMCloudEmptyCollectionViewItem
            let state = self.cloudPlates[indexPath.item]
            item.refreshUI(item: state.rawValue)
            return item
        }
        return NSCollectionViewItem.init()
    }
}

// MARK: - NSCollectionViewDelegate

extension KMCloudDocumentsViewController: NSCollectionViewDelegate {
    func collectionView(_ collectionView: NSCollectionView, didSelectItemsAt indexPaths: Set<IndexPath>) {
        if collectionView.isEqual(to: emptyCollectionView) {
            let state = self.cloudPlates[indexPaths.first!.item]
            loginCloud(state: state)
        }
    }
}

// MARK: - NSCollectionViewDelegateFlowLayout

extension KMCloudDocumentsViewController: NSCollectionViewDelegateFlowLayout {
    func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> NSSize {
        if collectionView.isEqual(to: emptyCollectionView) {
            return self.emptyCollectionView.itemSize
        }
        return CGSize(width: 218, height: 224)
    }
    
    func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
        if collectionView.isEqual(to: emptyCollectionView) {
            return self.emptyCollectionView.minimumLineSpacing
        }
        return 14
    }
    
    
    func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
        if collectionView.isEqual(to: emptyCollectionView) {
            return self.emptyCollectionView.minimumInteritemSpacing
        }
        return 14
    }
    
    func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, insetForSectionAt section: Int) -> NSEdgeInsets {
        if (collectionView.isEqual(to: self.emptyCollectionView)) {
            let width: CGFloat = NSWidth(collectionView.superview!.frame)
            let height: CGFloat = NSHeight(collectionView.superview!.frame)
            
            let itemSize = self.emptyCollectionView.itemSize
            let itemCount: Int = self.emptyCollectionView.numberOfItems(inSection: 0)
            let itemHSpace = self.emptyCollectionView.minimumLineSpacing
            let itemVSpace = self.emptyCollectionView.minimumInteritemSpacing
            var left: CGFloat = (width - itemSize.width * CGFloat(itemCount) - itemHSpace * CGFloat(itemCount-1)) * 0.5
            if (left < 0) {
                left = 0
            }
            var top: CGFloat = (height - itemSize.height * CGFloat(itemCount) - itemVSpace * CGFloat(itemCount-1)) * 0.5
            if (top < 0) {
                top = 0
            }
            
            return NSEdgeInsetsMake(top, left, top, left)
        }
        return NSEdgeInsetsZero
    }
}

// MARK: NSTableViewDelegate

extension KMCloudDocumentsViewController: NSTableViewDelegate {
    func tableView(_ tableView: NSTableView, heightOfRow row: Int) -> CGFloat {
        if tableView.isEqual(to: accountListTableView) {
            return 57
        } else if tableView.isEqual(to: fileListTableView) {
            return 75
        }
        return 0;
    }
    
    func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView? {
        let identifier = tableColumn?.identifier
        if tableView.isEqual(to: accountListTableView) {
            let server: KMCloudServer = self.accounts[row] as! KMCloudServer
            let cellView: KMCloudAccountListTableviewCell = tableView.makeView(withIdentifier:identifier!, owner: self) as! KMCloudAccountListTableviewCell
            cellView.accountLabel.stringValue = server.userEmail ?? ""
            cellView.toolTip = server.userEmail
            return cellView
        } else if tableView.isEqual(to: fileListTableView) {
            let file: KMServicesCloudFile = self.cloudFiles[row] as! KMServicesCloudFile
            if identifier == NSUserInterfaceItemIdentifier("name") {
                let cellView: KMCloudFileNameListTableviewCell = tableView.makeView(withIdentifier:identifier!, owner: self) as! KMCloudFileNameListTableviewCell
                if (file.filetype == .file) {
                    let fileType = KMCloudDocumentTools.getFileType(self.currentAccount!, file)
                    
                    let image = NSWorkspace.shared.icon(forFileType: fileType)
                    cellView.fileImageView.image = image
                    cellView.subtitleLabel.stringValue = fileType
                } else {
                    cellView.fileImageView.image = NSImage(named: NSImage.folderName)
                    cellView.subtitleLabel.stringValue = "Folders"
                }
                cellView.titleLabel.stringValue = file.fileName
                
                return cellView
            } else if identifier == NSUserInterfaceItemIdentifier("modifyTime") {
                let cellView: KMCloudFileModifyTimeListTableviewCell = tableView.makeView(withIdentifier:identifier!, owner: self) as! KMCloudFileModifyTimeListTableviewCell
                if (file.fileModiDateString != nil) {
                    cellView.modifyTimeLabel.stringValue = KMCloudDocumentTools.parseDate(file.fileModiDate)
                } else {
                    cellView.modifyTimeLabel.stringValue = ""
                }
                
                return cellView
            } else if identifier == NSUserInterfaceItemIdentifier("size") {
                let cellView: KMCloudFileSizeListTableviewCell = tableView.makeView(withIdentifier:identifier!, owner: self) as! KMCloudFileSizeListTableviewCell
                if (file.filetype == .file) {
                    cellView.sizeLabel.stringValue = file.fileSizeString
                } else {
                    cellView.sizeLabel.stringValue = ""
                }
                
                return cellView
            } else {
                let cellView: KMCloudFileNameListTableviewCell = tableView.makeView(withIdentifier:identifier!, owner: self) as! KMCloudFileNameListTableviewCell
                return cellView
            }
        } else {
            let cellView: KMCloudAccountListTableviewCell = tableView.makeView(withIdentifier:identifier!, owner: self) as! KMCloudAccountListTableviewCell
            return cellView
        }
    }
    
    func tableViewSelectionDidChange(_ notification: Notification) {
        let tableView = notification.object as! NSTableView
        if tableView.isEqual(to: accountListTableView) {
            let server: KMCloudServer = self.accounts[self.accountListTableView.selectedRow] as! KMCloudServer
            self.updateFilesList(server, nil)
            self.pathString = NSLocalizedString("Cloud Documents", comment: "")
            self.myPathControl.urlString = self.pathString
        } else if tableView.isEqual(to: fileListTableView) {}

    }
}

// MARK: NSTableViewDataSource

extension KMCloudDocumentsViewController: NSTableViewDataSource {
    func numberOfRows(in tableView: NSTableView) -> Int {
        if tableView.isEqual(to: accountListTableView) {
            return self.accounts.count
        } else if tableView.isEqual(to: fileListTableView) {
            return self.cloudFiles.count
        }
        return 0
    }
}

extension KMCloudDocumentsViewController: KMLoadingProtocol {
    func beginLoading() {
        self.view.beginLoading()
    }
    
    func endLoading() {
        self.view.endLoading()
    }
}

extension KMCloudDocumentsViewController: KMMenuTableViewDelegate {
    func km_menu(for event: NSEvent) -> NSMenu? {
        let point = self.fileListTableView.convert(event.locationInWindow, from: nil)
        let index = self.fileListTableView.row(at: point)
        if (index < 0) { /// 空白处
            return nil
        }
        
        
        let file: KMServicesCloudFile = self.cloudFiles[index] as! KMServicesCloudFile
        if (file.filetype == .folder) {
            let menu = NSMenu(title: "")
            let editItem = NSMenuItem(title: NSLocalizedString("Open Folder", comment: ""), action: #selector(openFolderMenuClick), keyEquivalent: "")
            editItem.target = self
            editItem.tag = index
            menu.addItem(editItem)
            return menu
        }
        if (file.filetype == .file) {
            let fileExtension: String = file.fileName.components(separatedBy: ".").last!
            if (fileExtension.lowercased() != "pdf") {
                return nil
            }
            
            let menu = NSMenu(title: "")
            let editItem = NSMenuItem(title: NSLocalizedString("Open File", comment: ""), action: #selector(openFileMenuClick), keyEquivalent: "")
            editItem.target = self
            editItem.tag = index
            menu.addItem(editItem)
            return menu
        }

        return nil
    }
}