//
//  DSignatureFileListViewController.swift
//  PDF Reader Pro Edition
//
//  Created by Niehaoyu on 2023/9/27.
//

import Cocoa

@objcMembers class DSignatureFileListViewController: NSViewController, NSTableViewDelegate, NSTableViewDataSource, NSMenuDelegate {
    
    @IBOutlet weak var contendView: NSView!
    @IBOutlet weak var titleLabel: NSTextField!
    @IBOutlet weak var subTitleLabel: NSTextField!
    @IBOutlet weak var tableView: NSTableView!
    @IBOutlet weak var updateButton: NSButton!
    @IBOutlet weak var closeButton: NSButton!
    @IBOutlet weak var createButton: NSButton!
    @IBOutlet weak var cancelButton: NSButton!
    @IBOutlet weak var continueButton: NSButton!
    
    @IBOutlet weak var progressMaskView: NSView!
    @IBOutlet weak var progressIndicator: NSProgressIndicator!
    
    var _isFileList: Bool = false
    var currentModel: KMDSignatureModel?
    
    private var signatureArrays: NSArray?
    
    var actionBlock: ((_ fileListVC: DSignatureFileListViewController, _ type: DSignatureActionType)->Void)?
    var viewCertDetailBlock: ((_ fileListVC: DSignatureFileListViewController, _ certificate: CPDFSignatureCertificate, _ isDigitalFile: Bool)->Void)?

    deinit {
        NotificationCenter.default.removeObserver(self)
    }
    
    override func viewWillAppear() {
        super.viewWillAppear()
        
        self.reloadData()
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do view setup here.
        
        self.tableView.delegate = self
        self.tableView.dataSource = self
        self.tableView.backgroundColor = NSColor.clear
        self.tableView.allowsEmptySelection = false

        self.localizedLanguage()
        
        self.progressMaskView.isHidden = true
        
        let menu = NSMenu.init()
        menu.delegate = self;
        self.tableView.menu = menu
        
        NotificationCenter.default.addObserver(self, selector: #selector(signatureDidStartLoadNoti), name: NSNotification.Name(rawValue: DSignatureDidStartLoadNotification), object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(signatureDidFinishLoadNoti), name: NSNotification.Name(rawValue: DSignatureDidFinishLoadNotification), object: nil)
        
    }
    
    //MARK: Setter
    var isFileList: Bool {
        set {
            _isFileList = newValue;
            if(_isFileList) {
                self.titleLabel.stringValue = NSLocalizedString("Add digital IDs from a file:", comment: "")
                self.subTitleLabel.stringValue = NSLocalizedString("The following digital ID will be added to your list of digital ID that you can use for digitally signing:", comment: "")
                self.cancelButton.title = NSLocalizedString("Previous Step", comment: "")
                self.createButton.isHidden = true
                self.updateButton.isHidden = true
            }else {
                self.titleLabel.stringValue = NSLocalizedString("Sign with a Digital ID", comment: "")
                self.subTitleLabel.stringValue = NSLocalizedString("Choose the digital ID that you want to use for signing:", comment: "")
                self.cancelButton.title = NSLocalizedString("Cancel", comment: "")
                self.createButton.isHidden = false
                self.updateButton.isHidden = false
            }
            self.reloadData()
        }
        get {
            return _isFileList;
        }
    }
    
    //MARK: Public Method
    func localizedLanguage() {
        
        self.titleLabel.stringValue = NSLocalizedString("Sign with a Digital ID", comment: "")
        self.subTitleLabel.stringValue = NSLocalizedString("Choose the digital ID that you want to use for signing:", comment: "")
        self.createButton.title = NSLocalizedString("Configure New Digital ID", comment: "")
        self.cancelButton.title = NSLocalizedString("Cancel", comment: "")
        self.updateButton.isHidden = false
        
        self.titleLabel.textColor = NSColor.labelColor
        self.subTitleLabel.textColor = NSColor.labelColor
        
        self.continueButton.title = NSLocalizedString("Continue", comment: "")
        self.updateButton.title = NSLocalizedString("Refresh", comment: "")
    }
    
    func reloadData() {
        self.signatureArrays = KMDSignatureManager.default().signatures
        self.tableView.reloadData()
        if let cnt = self.signatureArrays?.count, cnt > 0 {
            self.tableView.selectRowIndexes([0], byExtendingSelection: true)
            self.currentModel = self.signatureArrays?.firstObject as? KMDSignatureModel
            self.continueButton.isEnabled = true
        } else {
            self.continueButton.isEnabled = false
        }
    }
    
    func refreshSelectedState() {
        let selectRow = self.tableView.selectedRow
        
        for index in 0...self.tableView.numberOfRows-1 {
            let rowView = self.tableView.rowView(atRow: index, makeIfNecessary: true)
            let cellView = rowView?.view(atColumn: 0) as? DSignatureFileListCellView
            if (index == selectRow) {
                cellView?.radioBtn.state = .on
            } else {
                cellView?.radioBtn.state = .off
            }
        }
    }
    
    func menuItemClick_Delete() {
        let row = self.tableView.clickedRow
        
        let cnt = self.signatureArrays?.count ?? 0
        if row > -1 && row < cnt {
            let model = self.signatureArrays?[row] as? KMDSignatureModel
            let isFormKeyChain = model?.isFormKeyChain ?? true
            if self.isFileList == false && isFormKeyChain == false {
                KMDSignatureManager.default().removeSignatureCertPath(model?.filePath ?? "")
            }
            self.reloadData()
        }
    }
    
    //MARK: IBAction
    @IBAction func closeAction(_ sender: Any) {
        guard let callBack = self.actionBlock else {
            return
        }
        callBack(self, .cancel)
    }
    
    @IBAction func refreshAction(_ sender: Any) {
        DispatchQueue.main.async {
            self.progressIndicator.startAnimation(nil)
            self.progressMaskView.isHidden = false
            DispatchQueue.global().async {
                KMDSignatureManager.default().loadAllKeyChainCertificates()
                DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 1) {
                    self.progressIndicator.stopAnimation(nil)
                    self.progressMaskView.isHidden = true
                }
            }
        }
    }
    
    @IBAction func configNewAction(_ sender: Any) {
        guard let callBack = self.actionBlock else {
            return
        }
        callBack(self, .createNewDsign)
    }
    
    @IBAction func cancelAction(_ sender: Any) {
        guard let callBack = self.actionBlock else {
            return
        }
        callBack(self, .cancel)
    }
    
    @IBAction func continueAction(_ sender: Any) {
        guard let callBack = self.actionBlock else {
            return
        }
        callBack(self, .confirm)
    }
    
    //MARK: NSTableViewDelegate
    func numberOfRows(in tableView: NSTableView) -> Int {
        if self.isFileList {
            return 1
        }
        return self.signatureArrays?.count ?? 0
    }
    
    func tableView(_ tableView: NSTableView, heightOfRow row: Int) -> CGFloat {
        return 66.0
    }
    
    func tableView(_ tableView: NSTableView, rowViewForRow row: Int) -> NSTableRowView? {
        let row = KMCustomTableRowView.init()
        
        return row
    }
    
    func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView? {
        let cellView = DSignatureFileListCellView()
        cellView.itemIndex = row
        let cnt = self.signatureArrays?.count ?? 0
        if (cnt > row) {
            let model = self.signatureArrays?[row] as? KMDSignatureModel
            cellView.signModel = model
        }
        if (cellView.signModel == self.currentModel) {
            cellView.radioBtn.state = .on
        } else {
            cellView.radioBtn.state = .off
        }
        
        weak var weakSelf = self
        cellView.radioActionHandle = {_ in
            if weakSelf!.tableView.numberOfRows > cellView.itemIndex {
                weakSelf?.tableView.selectRowIndexes([cellView.itemIndex], byExtendingSelection: false)
            }
            weakSelf?.currentModel = weakSelf!.signatureArrays?[weakSelf!.tableView.selectedRow] as? KMDSignatureModel
            weakSelf?.refreshSelectedState()
        }
        cellView.viewDetailBlock = {cellView in
            var filePath: NSString?
            var save: Bool = true
            var password: String = ""
            
            if cellView.signModel?.isFormKeyChain == true {
                let folderPath = kDSignatureFolderPath
                if FileManager.default.fileExists(atPath: folderPath) == false {
                    let success: ()? = try?FileManager.default.createDirectory(atPath: folderPath, withIntermediateDirectories: false)
                    if success == nil {
                        save = false
                    }
                }
                filePath = kDSignatureFolderPath.appending("/KMDSignatures.p12") as NSString
                save = KMDSignatureManager.exportKeyChain(withP12FilePath: filePath as String?, signatureModel: cellView.signModel, passWord: password as String?)
                cellView.signModel?.filePath = filePath as? String
            } else {
                if cellView.signModel?.password != nil {
                    password = (cellView.signModel?.password) ?? ""
                }
                if cellView.signModel?.filePath != nil {
                    filePath = cellView.signModel?.filePath as? NSString
                }
            }
            
            if save {
                var certificate: CPDFSignatureCertificate?
                certificate = CPDFSignatureCertificate(pkcs12Path: filePath as String?, password: password as String?)
                if certificate != nil {
                    guard let callBack = self.viewCertDetailBlock else {
                        return
                    }
                    callBack(self, certificate!, !(cellView.signModel?.isFormKeyChain ?? false))
                }
            } else {
                let alert = NSAlert.init()
                alert.messageText = NSLocalizedString("Failed to get certificate details!", comment: "")
                alert.addButton(withTitle: NSLocalizedString("OK", comment: ""))
                alert.runModal()
            }
        }
        return cellView
    }
    
    func tableViewSelectionDidChange(_ notification: Notification) {
        let cnt = self.signatureArrays?.count ?? 0
        if (cnt > self.tableView.selectedRow) {
            self.currentModel = self.signatureArrays?[self.tableView.selectedRow] as? KMDSignatureModel
            
            self.refreshSelectedState()
        }
    }
    
    //MARK: NSMenuDelegate
    func menuNeedsUpdate(_ menu: NSMenu) {
        menu.removeAllItems()
        
        let row = self.tableView.clickedRow
        let cnt = self.signatureArrays?.count ?? 0
        if row > -1 && row < cnt {
            let model = self.signatureArrays?[row] as? KMDSignatureModel
            let isFormKeyChain = model?.isFormKeyChain ?? true
            if self.isFileList == false && isFormKeyChain == false {
                menu.addItem(withTitle: NSLocalizedString("Delete", comment: ""), action: #selector(menuItemClick_Delete), keyEquivalent: "")
            }
        }
    }
    
    //MARK: Noti
    func signatureDidStartLoadNoti() {
        DispatchQueue.main.async {
            self.progressIndicator.startAnimation(nil)
            self.progressMaskView.isHidden = false
        }
    }
    
    func signatureDidFinishLoadNoti() {
        DispatchQueue.main.async {
            self.progressIndicator.stopAnimation(nil)
            self.progressMaskView.isHidden = true
            
            self.reloadData()
        }
    }
}