PDF_Office/PDF Office/PDF Master/Class/PDFTools/Background/New/View/KMAddBackgroundView.swift

//
//  KMAddBackgroundView.swift
//  PDF Master
//
//  Created by lizhe on 2023/11/14.
//

import Cocoa

enum KMBackgroundManagerType: Int {
    case add = 0
    case edit
    case use
}

typealias KMAddBackgroundViewOperateCallBack = (_ background: KMBackgroundModel, _ countType: Int) -> ()
typealias KMAddBackgroundViewBatchAction = (_ view: KMAddBackgroundView, _ files: [KMFileAttribute]) -> Void
typealias KMAddBackgroundViewCancelAction = (_ view: KMAddBackgroundView) -> Void

class KMAddBackgroundView: KMBaseXibView, NSComboBoxDelegate {
    
    @IBOutlet weak var pdfView: KMWatermarkPDFView!
    @IBOutlet weak var previousButton: NSButton!
    @IBOutlet weak var nextButton: NSButton!
    @IBOutlet weak var currentPageIndexTextField: NSTextField!
    @IBOutlet weak var totalPageCountlabel: NSTextField!
    
    @IBOutlet weak var typeBox: NSBox!
    @IBOutlet weak var colorButton: NSButton!
    @IBOutlet weak var colorWell: NSColorWell!
    @IBOutlet weak var fileButton: NSButton!
    
    @IBOutlet weak var filePathLabel: NSTextField!
    @IBOutlet weak var browseButton: NSButton!
    @IBOutlet weak var ratioLabel: NSTextField!
    @IBOutlet weak var ratioTextField: NSTextField!
    @IBOutlet weak var ratioStepper: NSStepper!
    
    @IBOutlet weak var appearanceBox: NSBox!
    @IBOutlet weak var angleLabel: NSTextField!
    @IBOutlet weak var angleTextField: NSTextField!
    @IBOutlet weak var angleStepper: NSStepper!
    @IBOutlet weak var left45IndicateView: KMAngleIndicateView!
    @IBOutlet weak var horizontalIndicateView: KMAngleIndicateView!
    @IBOutlet weak var right45IndicateView: KMAngleIndicateView!
    @IBOutlet weak var alphaLabel: NSTextField!
    @IBOutlet weak var alphaSlider: NSSlider!
    @IBOutlet weak var alphaTextField: NSTextField!
    @IBOutlet weak var alphaStepper: NSStepper!
    @IBOutlet weak var postionView: KMPostionIndicateView!
    @IBOutlet weak var verticalGapLabel: NSTextField!
    @IBOutlet weak var verticalGapTextField: NSTextField!
    @IBOutlet weak var verticalStepper: NSStepper!
    @IBOutlet weak var horizontalGapLabel: NSTextField!
    @IBOutlet weak var horizontalGapTextField: NSTextField!
    @IBOutlet weak var horizontalStepper: NSStepper!
    @IBOutlet weak var pageRangeComboBox: NSComboBox!
    @IBOutlet weak var pageRangeLabel: NSTextField!
    
    @IBOutlet weak var saveToTemplateButton: NSButton!
    @IBOutlet weak var templateNameLabel: NSTextField!
    @IBOutlet weak var templateNameTextField: NSTextField!
    
    @IBOutlet weak var doneButton: NSButton!
    @IBOutlet weak var cancelButton: NSButton!
    @IBOutlet weak var batchButton: NSButton!
    
    var isHiddenBatchBtn: Bool = false
    
    var background: KMBackgroundModel = KMBackgroundModel()
    var originalBackground: KMBackgroundModel = KMBackgroundModel()
    var filePath: String = Bundle.main.path(forResource: "Quick Start Guide", ofType: "pdf") ?? ""
    var password: String = ""
    var type: KMBackgroundManagerType = .use
    var pdfDocument: CPDFDocument? {
        didSet {
            self.pdfView.document = pdfDocument
            self.reloadData()
        }
    }
    var backgroundType: KMBackgroundType = .color
        
    var initialID: String!
    var currentType: Int = 0
    
    var cancelAction: KMAddBackgroundViewCancelAction?
    var batchAction: KMAddBackgroundViewCancelAction?
    var operateCallBack: KMAddBackgroundViewOperateCallBack?

    var onlyManagerTemplate: Bool = true

    // MARK: - Dealloc

    deinit {
        NotificationCenter.default.removeObserver(self)
    }

    // MARK: - Init Methods

    convenience init?(baseFile filePath: String, background backgroundObject: KMBackgroundModel, password: String, type: KMBackgroundManagerType, fileType countType: Int) {
        self.init()
        self.filePath = filePath
        self.password = password
        self.background = backgroundObject
        self.originalBackground = backgroundObject
        self.initialID = backgroundObject.backgroundID
        self.type = type
        self.pdfDocument = CPDFDocument(url: URL(fileURLWithPath: self.filePath))

        if pdfDocument!.isLocked {
            pdfDocument!.unlock(withPassword: password)
        }

        if pdfDocument!.isLocked {
            return nil
        }
    }

    override func setup() {
//        pdfView.background = background
//        pdfView.document = pdfDocument
        pdfView.autoScales = true
//        pdfView.documentView?.enclosingScrollView?.hasVerticalScroller = false
//        pdfView.documentView?.enclosingScrollView?.hasHorizontalScroller = false

        for i in 0..<3 {
            for j in 0..<3 {
                if i == Int(background.horizontalMode) && j == Int(background.verticalMode) {
                    postionView.style = KMPositionIndicateViewStyle(rawValue: i + 3 * j)!
                }
            }
        }

        postionView.styleChangedCallBack = { [weak self] in
            guard let self = self else { return }
            self.background.horizontalMode = self.postionView.style.rawValue % 3
            self.background.verticalMode = self.postionView.style.rawValue / 3
            self.self.updatePDFView()
            if self.filePathLabel.stringValue.count > 0 {
                self.doneButton.isEnabled = true
            }
        }

        currentPageIndexTextField.stringValue = "1"
//        let numberFormatter = currentPageIndexTextField.formatter as! NumberFormatter
//        numberFormatter.maximum = NSNumber(value: pdfDocument.pageCount)
        

        left45IndicateView.style = .left45
        left45IndicateView.touchCallBack = { [weak self] in
            guard let self = self else { return }
            self.background.rotation = 45
            self.angleStepper.doubleValue = 45
            self.angleTextField.stringValue = "\(45)"
            self.checkAngle()
            if self.filePathLabel.stringValue.count > 0 {
                self.doneButton.isEnabled = true
            }
            self.updatePDFView()
        }

        horizontalIndicateView.style = .horizontal
        horizontalIndicateView.touchCallBack = { [weak self] in
            guard let self = self else { return }
            self.background.rotation = 0
            self.angleStepper.doubleValue = 0
            self.angleTextField.stringValue = "\(0)"
            self.checkAngle()
            if self.filePathLabel.stringValue.count > 0 {
                self.doneButton.isEnabled = true
            }
            self.updatePDFView()
        }

        right45IndicateView.style = .right45
        right45IndicateView.touchCallBack = { [weak self] in
            guard let self = self else { return }
            self.background.rotation = -45
            self.angleStepper.doubleValue = -45
            self.angleTextField.stringValue = "\(-45)"
            self.checkAngle()
            if self.filePathLabel.stringValue.count > 0 {
                self.doneButton.isEnabled = true
            }
            self.updatePDFView()
        }

        checkAngle()

        typeBox.titleFont = NSFont.systemFont(ofSize: 13)

        colorWell.color = background.color ?? NSColor.red
        templateNameTextField.stringValue = background.backgroundID

        appearanceBox.titleFont = NSFont.systemFont(ofSize: 13)

        saveToTemplateButton.isEnabled = onlyManagerTemplate

//        if type == .use {
//            saveToTemplateButton.isHidden = true
//            saveToTemplateButton.state = .off
//        } else {
//            saveToTemplateButton.isHidden = false
//            saveToTemplateButton.state = .on
//        }

        pageRangeComboBox.removeAllItems()
        pageRangeComboBox.addItems(withObjectValues: [
            NSLocalizedString("All Pages", comment: ""),
            NSLocalizedString("Odd Pages Only", comment: ""),
            NSLocalizedString("Even Pages Only", comment: ""),
            NSLocalizedString("e.g. 1,3-5,10", comment: "")
        ])
        pageRangeComboBox.placeholderString = NSLocalizedString("e.g. 1,3-5,10", comment: "")
        pageRangeComboBox.delegate = nil
        pageRangeComboBox.selectItem(at: 0)
        pageRangeComboBox.isEditable = false
        pageRangeComboBox.delegate = self
    }
    
    override func addNotification() {
        NotificationCenter.default.addObserver(self, selector: #selector(pageChangeNotification), name: NSNotification.Name("PDFViewPageChangedNotification"), object: self.pdfView)
    }
    override func updateLanguage() {
        typeBox.title = NSLocalizedString("Source", comment: "")

        batchButton.title = NSLocalizedString("Batch", comment: "");
        cancelButton.title = NSLocalizedString("Cancel", comment: "");
        
        colorButton.title = NSLocalizedString("Color", comment: "")
        fileButton.title = NSLocalizedString("File", comment: "")
        browseButton.title = NSLocalizedString("Choose...", comment: "")
        ratioLabel.stringValue = "\(NSLocalizedString("Ratio", comment: "")):"

        appearanceBox.title = NSLocalizedString("Appearance", comment: "")
        angleLabel.stringValue = "\(NSLocalizedString("Rotation", comment: "")):"
        alphaLabel.stringValue = "\(NSLocalizedString("Opacity", comment: "")):"
        pageRangeLabel.stringValue = "\(NSLocalizedString("Page Range", comment: "")):"
        horizontalGapLabel.stringValue = "X:"
        verticalGapLabel.stringValue = "Y:"
        
        saveToTemplateButton.title = NSLocalizedString("Add to Template", comment: "")
        
        if (self.type == .add) {
            self.doneButton.title = NSLocalizedString("Apply", comment: "");
            self.batchButton.isHidden = true
        } else if (self.type == .edit) {
            self.doneButton.title = NSLocalizedString("Apply", comment: "");
            self.batchButton.isHidden = true
        } else if (self.type == .use) {
            self.doneButton.title = NSLocalizedString("Save & Apply", comment: "");
        }
    }

    private func checkAngle() {
        left45IndicateView.isSelcted = false
        horizontalIndicateView.isSelcted = false
        right45IndicateView.isSelcted = false

        if background.rotation == -45 {
            right45IndicateView.isSelcted = true
        } else if background.rotation == 0 {
            horizontalIndicateView.isSelcted = true
        } else if background.rotation == 45 {
            left45IndicateView.isSelcted = true
        }
    }

    override func reloadData() {
        guard let pdfDocument = pdfDocument else { return }
        
        totalPageCountlabel.stringValue = "/ \(pdfDocument.pageCount)"
        
        filePathLabel.stringValue = background.imagePath
        filePathLabel.placeholderString = NSLocalizedString("Select a File", comment: "")
        angleStepper.doubleValue = Double(-background.rotation)
        angleTextField.stringValue = "\(angleStepper.doubleValue)"
        alphaSlider.doubleValue = background.opacity
        alphaStepper.doubleValue = background.opacity
        let opacity = round(background.opacity * 100) / 100
        alphaTextField.stringValue = "\(Int(opacity * 100))%"
        ratioStepper.doubleValue = background.scale
        ratioTextField.stringValue = "\(Int(background.scale * 100))%"
        if currentType == 0 {
            changeTypeBoxState(true)
        } else {
            changeTypeBoxState(false)
        }
        pageRangeComboBox.delegate = nil
        switch background.pageRangeType {
        case .all:
            pageRangeComboBox.isEditable = false
            pageRangeComboBox.selectItem(at: 0)
        case .odd:
            pageRangeComboBox.isEditable = false
            pageRangeComboBox.selectItem(at: 1)
        case .even:
            pageRangeComboBox.isEditable = false
            pageRangeComboBox.selectItem(at: 2)
        case .other:
            pageRangeComboBox.isEditable = true
            pageRangeComboBox.selectItem(at: 3)
            pageRangeComboBox.stringValue = background.pagesString 
            window?.makeFirstResponder(pageRangeComboBox)
        }
        pageRangeComboBox.delegate = self
        verticalStepper.doubleValue = background.verticalSpace
        verticalGapTextField.stringValue = "\(verticalStepper.doubleValue)"
        horizontalStepper.doubleValue = background.horizontalSpace
        horizontalGapTextField.stringValue = "\(horizontalStepper.doubleValue)"
        batchButton.isHidden = isHiddenBatchBtn
    }

    private func changeTypeBoxState(_ isColor: Bool) {
        if isColor {
            currentType = 0
            colorButton.state = .on
            colorWell.isEnabled = true
            fileButton.state = .off
            browseButton.isEnabled = false
            ratioTextField.isEnabled = false
            ratioStepper.isEnabled = false
            background.color = colorWell.color
            background.type = .color
            background.scale = 1
            doneButton.isEnabled = true
        } else {
            currentType = 1
            colorButton.state = .off
            colorWell.isEnabled = false
            fileButton.state = .on
            browseButton.isEnabled = true
            ratioTextField.isEnabled = true
            ratioStepper.isEnabled = true
            background.color = nil
            background.type = .file
            background.scale = ratioStepper.doubleValue
            doneButton.isEnabled = filePathLabel.stringValue.count > 0
        }
        self.updatePDFView()
    }
    
    func updatePDFView() {
//        pdfView.needsDisplay = true
//        pdfView.layoutDocumentView()
//        pdfView.setNeedsDisplayForVisiblePages()
        let document = CPDFDocument(url: self.pdfDocument?.documentURL)
        guard let document = document else { return }
        document.unlock(withPassword: self.pdfDocument?.password)
    
        let tBackground: CPDFBackground = document.background()
        tBackground.opacity = background.opacity
        tBackground.scale = background.scale
        tBackground.rotation = CGFloat(-background.rotation)
        tBackground.horizontalAlignment = UInt(background.horizontalMode)
        tBackground.verticalAlignment = UInt(background.verticalMode)
        tBackground.xOffset = background.horizontalSpace
        tBackground.yOffset = background.verticalSpace

        if let color = background.color {
            tBackground.color = color
            tBackground.type = .color
        } else if background.imagePath.count != 0 {
            let image = NSImage(contentsOfFile: background.imagePath)!
            tBackground.setImage(image)
            tBackground.type = .image
        }

        if background.pagesString.count != 0 {
            tBackground.pageString = background.pagesString
        } else {
            let pageString = "0-\(document.pageCount - 1)"
            tBackground.pageString = pageString
        }

        tBackground.update()
        self.pdfView.document = document

//        // Save to temporary path
//        let documentPath = NSTemporaryDirectory()
//        let tempPath = (documentPath as NSString).appendingPathComponent((path as NSString).lastPathComponent)
//        try? FileManager.default.removeItem(atPath: tempPath)
//
//        let result = document.write(to: URL(fileURLWithPath: tempPath))
//        if result {
//            if FileManager.default.fileExists(atPath: path) {
//                try? FileManager.default.removeItem(atPath: path)
//            }
//            try? FileManager.default.moveItem(atPath: tempPath, toPath: path)
//        } else {
//            try? FileManager.default.removeItem(atPath: tempPath)
//        }
    }

    // Other methods...
    
    @objc func controlTextDidEndEditing(_ notification: Notification) {
        guard let textField = notification.object as? NSTextField else { return }

        switch textField {
        case ratioTextField:
            let formatter = textField.formatter as? NumberFormatter
            if let floatValue = formatter?.number(from: textField.stringValue)?.floatValue {
                ratioStepper.doubleValue = Double(floatValue)
                background.scale = Double(floatValue)
                self.updatePDFView()
            }
        case angleTextField:
            if let integerValue = Int(textField.stringValue) {
                background.rotation = CGFloat(-integerValue)
                angleStepper.doubleValue = Double(-background.rotation)
                checkAngle()
                self.updatePDFView()
            }
        case alphaTextField:
            let formatter = textField.formatter as? NumberFormatter
            if let floatValue = formatter?.number(from: textField.stringValue)?.floatValue {
                alphaSlider.doubleValue = Double(floatValue)
                alphaStepper.doubleValue = Double(floatValue)
                background.opacity = Double(floatValue)
                self.updatePDFView()
            }
        case pageRangeComboBox:
            if pageRangeComboBox.indexOfSelectedItem == -1 {
                if !checkPageRangeValidate(pageRangeComboBox.stringValue) {
                    let alert = NSAlert()
                    alert.alertStyle = .critical
                    alert.messageText = "\(pdfDocument!.documentURL.lastPathComponent) \(NSLocalizedString("Invalid page range or the page number is out of range. Please try again.", comment: ""))"
                    alert.runModal()
                    window?.makeFirstResponder(pageRangeComboBox)
                    return
                } else {
                    background.pagesString = pageRangeComboBox.stringValue
                    self.updatePDFView()
                }
            }
        case verticalGapTextField:
            if let integerValue = Int(verticalGapTextField.stringValue) {
                background.verticalSpace = CGFloat(integerValue)
                verticalStepper.doubleValue = background.verticalSpace
                self.updatePDFView()
            }
        case horizontalGapTextField:
            if let integerValue = Int(horizontalGapTextField.stringValue) {
                background.horizontalSpace = CGFloat(integerValue)
                horizontalStepper.doubleValue = background.horizontalSpace
                self.updatePDFView()
            }
        case currentPageIndexTextField:
            if let pageIndex = Int(currentPageIndexTextField.stringValue), let page = pdfDocument!.page(at: UInt(pageIndex - 1)) {
                pdfView.go(to: page)
            }
        default:
            break
        }

        if filePathLabel.stringValue.count > 0 {
            doneButton.isEnabled = true
        }
    }

    @objc func comboBoxSelectionDidChange(_ notification: Notification) {
        guard notification.object as? NSComboBox == pageRangeComboBox else { return }

        pageRangeComboBox.isEditable = false
        switch pageRangeComboBox.indexOfSelectedItem {
        case 0:
            background.pageRangeType = .all
        case 1:
            background.pageRangeType = .odd
        case 2:
            background.pageRangeType = .even
        default:
            background.pageRangeType = .other
            pageRangeComboBox.stringValue = ""
            pageRangeComboBox.isEditable = true
            window?.makeFirstResponder(pageRangeComboBox)
        }

        if filePathLabel.stringValue.count > 0 {
            doneButton.isEnabled = true
        }
    }

    func checkPageRangeValidate(_ pageRangeString: String) -> Bool {
        let fileAttribute = KMFileAttribute()
        fileAttribute.filePath = pdfDocument!.documentURL.path
        fileAttribute.bAllPage = false
        fileAttribute.pagesString = pageRangeComboBox.stringValue

        return fileAttribute.fetchSelectPages().count != 0
    }

    func saveAsPDF(with background: KMBackgroundModel, to path: String, autoOpen: Bool) {
        DispatchQueue.global(qos: .default).async { [unowned self] in
            var filePath = self.pdfDocument!.documentURL?.path
            let password = self.password
            if filePath == nil {
                let writeSuccess = self.pdfDocument!.write(to: URL(fileURLWithPath: kNewDocumentTempSavePath(NSLocalizedString("Untitled", comment: ""))))
                if writeSuccess {
                    self.pdfDocument = CPDFDocument(url: URL(fileURLWithPath: kNewDocumentTempSavePath(NSLocalizedString("Untitled", comment: ""))))!
                    filePath = self.pdfDocument!.documentURL?.path
                }
            }

            let document = CPDFDocument(url: URL(fileURLWithPath: filePath!))!
            document.unlock(withPassword: password)
            

            let tBackground: CPDFBackground = document.background()
            tBackground.opacity = background.opacity
            tBackground.scale = background.scale
            tBackground.rotation = CGFloat(-background.rotation)
            tBackground.horizontalAlignment = UInt(background.horizontalMode)
            tBackground.verticalAlignment = UInt(background.verticalMode)
            tBackground.xOffset = background.horizontalSpace
            tBackground.yOffset = background.verticalSpace

            if let color = background.color {
                tBackground.color = color
                tBackground.type = .color
            } else if background.imagePath.count != 0 {
                let image = NSImage(contentsOfFile: background.imagePath)!
                tBackground.setImage(image)
                tBackground.type = .image
            }

            if background.pagesString.count != 0 {
                tBackground.pageString = background.pagesString
            } else {
                let pageString = "0-\(document.pageCount - 1)"
                tBackground.pageString = pageString
            }

            tBackground.update()

            // Save to temporary path
            let documentPath = NSTemporaryDirectory()
            let tempPath = (documentPath as NSString).appendingPathComponent((path as NSString).lastPathComponent)
            try? FileManager.default.removeItem(atPath: tempPath)

            let result = document.write(to: URL(fileURLWithPath: tempPath))
            if result {
                if FileManager.default.fileExists(atPath: path) {
                    try? FileManager.default.removeItem(atPath: path)
                }
                try? FileManager.default.moveItem(atPath: tempPath, toPath: path)
            } else {
                try? FileManager.default.removeItem(atPath: tempPath)
            }

            if result {
                DispatchQueue.main.async {
                    let needSave = self.saveToTemplateButton.state == .on
                    if needSave {
                        if self.checkPageRangeValidate(self.pageRangeComboBox.stringValue) && self.pageRangeComboBox.indexOfSelectedItem == -1 {
                            self.background.pagesString = self.pageRangeComboBox.stringValue
                        }
                        KMBackgroundManager.defaultManager.addTemplate(model: self.background)
                        NotificationCenter.default.post(name: NSNotification.Name("KMBatchOperateWatermarksNotification"), object: self)
                    }
                    self.cancelAction?(self)
                    if autoOpen {
                        NSDocumentController.shared.openDocument(withContentsOf: URL(fileURLWithPath: path), display: true) { _, _, _ in }
                    } else {
                        NSWorkspace.shared.selectFile(path, inFileViewerRootedAtPath: "")
                    }
                }
            }
        }
    }
    
    static func saveAsPDFRemoveAllBackground(PDFDocument: CPDFDocument, password: String?, toPath path: String, completionHandler handler: ((Int) -> Void)?) {
        DispatchQueue.global(qos: .default).async {
            guard let filePath = PDFDocument.documentURL?.path else {
                return
            }

            let document = CPDFDocument(url: URL(fileURLWithPath: filePath))
            if let password = password {
                document?.unlock(withPassword: password)
            }

            let tBackground: CPDFBackground = document!.background()
            tBackground.clear()


            // Save to a temporary path
            let documentPath = NSTemporaryDirectory()
            let tempPath = (documentPath as NSString).appendingPathComponent((path as NSString).lastPathComponent)

            if FileManager.default.fileExists(atPath: tempPath) {
                try? FileManager.default.removeItem(atPath: tempPath)
            }

            if let result = document?.write(to: URL(fileURLWithPath: tempPath)) {
                if FileManager.default.fileExists(atPath: path) {
                    try? FileManager.default.removeItem(atPath: path)
                }

                try? FileManager.default.moveItem(atPath: tempPath, toPath: path)

                DispatchQueue.main.async {
                    handler?(1)
                }
            } else {
                try? FileManager.default.removeItem(atPath: tempPath)

                DispatchQueue.main.async {
                    handler?(0)
                }
            }
        }
    }

    
    func kNewDocumentTempSavePath(_ fileName: String) -> String {
        let searchPath = NSSearchPathForDirectoriesInDomains(.applicationSupportDirectory, .userDomainMask, true).last
        let append1 = searchPath?.stringByAppendingPathComponent(Bundle.main.bundleIdentifier!)
        let append2 = append1!.stringByAppendingPathComponent(String(format: "%@", fileName))
        return append2
    }

    func isDamageImage(_ image: NSImage, imagePath path: String) -> Bool {
        let addImageAnnotation = (NSSearchPathForDirectoriesInDomains(.applicationSupportDirectory, .userDomainMask, true).last! as NSString).appendingPathComponent(Bundle.main.bundleIdentifier!).stringByAppendingPathComponent("addImageAnnotation")
        if !FileManager.default.fileExists(atPath: addImageAnnotation) {
            try? FileManager.default.createDirectory(atPath: addImageAnnotation, withIntermediateDirectories: false, attributes: nil)
        }

        let data = image.tiffRepresentation!
        let imageRep = NSBitmapImageRep(data: data)!
        imageRep.size = image.size
        var imageData: Data?

        if path.lowercased() == "png" {
            imageData = imageRep.representation(using: .png, properties: [:])
        } else {
            imageData = imageRep.representation(using: .jpeg, properties: [:])
        }

        let rPath = (addImageAnnotation as NSString).appendingPathComponent(tagString() + ".png")
        return ((try? imageData?.write(to: URL(fileURLWithPath: rPath), options: .atomic)) == nil)
    }

    func tagString() -> String {
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "yyMMddHHmmss"
        return String(format: "%@%04d", dateFormatter.string(from: Date()), arc4random() % 10000)
    }

    // ... (remaining methods)
    @objc func pageChangeNotification(notification: NSNotification) {
        self.currentPageIndexTextField.stringValue = self.pdfView.currentPage().label;
    }
}

extension KMAddBackgroundView {
    @IBAction func cancelButtonAction(_ sender: Any) {
        guard let callBack = cancelAction else { return }
        
        callBack(self)
    }
    
    @IBAction func buttonClicked_SwitchBackgroundType(_ sender: Any) {
        changeTypeBoxState(sender as? NSObject == colorButton)
    }

    @IBAction func colorWellChanged(_ sender: NSColorWell) {
        background.color = sender.color
        self.updatePDFView()
    }

    @IBAction func radioStepperAction(_ sender: NSStepper) {
        ratioTextField.stringValue = "\(Int(sender.doubleValue * 100))%"
        background.scale = sender.doubleValue
        self.updatePDFView()

        if filePathLabel.stringValue.count > 0 {
            doneButton.isEnabled = true
        }
    }

    @IBAction func angleStepperAction(_ sender: NSStepper) {
        angleTextField.stringValue = "\(sender.doubleValue)"
        background.rotation = CGFloat(Int(sender.doubleValue))
        checkAngle()
        self.updatePDFView()

        if filePathLabel.stringValue.count > 0 {
            doneButton.isEnabled = true
        }
    }

    @IBAction func alphaSliderAction(_ sender: NSSlider) {
        background.opacity = sender.doubleValue
        alphaStepper.doubleValue = sender.doubleValue
        alphaTextField.stringValue = "\(Int(sender.doubleValue * 100))%"

        if filePathLabel.stringValue.count > 0 {
            doneButton.isEnabled = true
        }
        self.updatePDFView()
    }

    @IBAction func verticalStepperAction(_ sender: NSStepper) {
        verticalGapTextField.stringValue = "\(sender.doubleValue)"
        background.verticalSpace = sender.doubleValue
        self.updatePDFView()

        if filePathLabel.stringValue.count > 0 {
            doneButton.isEnabled = true
        }
    }

    @IBAction func horizentalStepperAction(_ sender: NSStepper) {
        horizontalGapTextField.stringValue = "\(sender.doubleValue)"
        background.horizontalSpace = sender.doubleValue
        self.updatePDFView()

        if filePathLabel.stringValue.count > 0 {
            doneButton.isEnabled = true
        }
    }

    @IBAction func alphaSteperAction(_ sender: NSStepper) {
        alphaTextField.stringValue = "\(Int(sender.doubleValue * 100))%"
        background.opacity = sender.doubleValue
        alphaStepper.doubleValue = sender.doubleValue
        self.updatePDFView()

        if filePathLabel.stringValue.count > 0 {
            doneButton.isEnabled = true
        }
    }

    @IBAction func goPrevious(_ sender: Any) {
        if pdfView.canGoToPreviousPage() {
            pdfView.goToPreviousPage(nil)
        }
        let index = pdfDocument!.index(for: pdfView.currentPage())
        currentPageIndexTextField.stringValue = "\(index + 1)"
    }

    @IBAction func goNext(_ sender: Any) {
        if pdfView.canGoToNextPage() {
            pdfView.goToNextPage(nil)
        }

        let index = pdfDocument!.index(for: pdfView.currentPage())
        currentPageIndexTextField.stringValue = "\(index + 1)"
    }

    @IBAction func buttonClicked_BrowserFile(_ sender: Any) {
        let openPanel = NSOpenPanel()
        openPanel.canChooseDirectories = false
        openPanel.canChooseFiles = true
        openPanel.allowsMultipleSelection = false
        openPanel.allowedFileTypes = ["jpg", "cur", "bmp", "jpeg", "gif", "png", "tiff", "tif", "ico", "icns", "tga", "psd", "eps", "hdr", "jp2", "jpc", "pict", "sgi", "pdf"]

        openPanel.beginSheetModal(for: window!) { (result) in
            if result == .OK {
                guard let url = openPanel.url else { return }
                let filePath: NSString = url.path as NSString

                if filePath.pathExtension.lowercased() == "pdf" {
                    let pdf = CPDFDocument(url: url)
                    if pdf?.isEncrypted == true {
                        return
                    }
                }

                if let image = NSImage(contentsOfFile: url.path), !self.isDamageImage(image, imagePath: url.path) {
                    self.filePathLabel.stringValue = url.path
                    self.doneButton.isEnabled = true
                    self.background.imagePath = url.path
                    self.background.image = image
                    self.background.backgroundID = url.path.lastPathComponent.deletingPathExtension
                    self.templateNameTextField.stringValue = url.path.lastPathComponent.deletingPathExtension
                    self.self.updatePDFView()
                }
            }
        }
    }

    // ... (remaining IBActions)

    @IBAction func buttonClicked_Batch(_ sender: Any) {
        if background.type == .color {
            background.imagePath = ""
        } else {
            background.color = nil
            if background.image == nil {
                return
            }
        }

        if templateNameTextField.stringValue.count < 1 {
            background.backgroundID = initialID
        } else {
            background.backgroundID = templateNameTextField.stringValue
        }

        let needSave = saveToTemplateButton.state == .on
        if needSave {
            KMBackgroundManager.defaultManager.addTemplate(model: background)
        }

        operateCallBack?(background, currentType)
    }

    @IBAction func buttonClicked_Done(_ sender: Any) {
        guard let pdfDocument = pdfDocument else { return }
        if background.type == .color {
            background.imagePath = ""
        } else {
            background.color = nil
            if background.image == nil {
                return
            }
        }

        if templateNameTextField.stringValue.isEmpty {
            background.backgroundID = initialID
        } else {
            background.backgroundID = templateNameTextField.stringValue
        }

        // Avoid showing the page range alert twice
        if checkPageRangeValidate(pageRangeComboBox.stringValue) {
            background.pagesString = pageRangeComboBox.stringValue
            self.updatePDFView()
            window?.makeFirstResponder(self)
        }

        let needSave = saveToTemplateButton.state == .on
        var pages = [Int]()

        switch pageRangeComboBox.indexOfSelectedItem {
        case 0:
            pages = Array(0..<Int(pdfDocument.pageCount))
        case 1:
            pages = Array(stride(from: 0, to: Int(pdfDocument.pageCount), by: 2))
        case 2:
            pages = Array(stride(from: 1, to: Int(pdfDocument.pageCount), by: 2))
        default:
            let fileAttribute = KMFileAttribute()
            fileAttribute.filePath = pdfDocument.documentURL?.path ?? ""
            fileAttribute.bAllPage = false
            fileAttribute.pagesString = pageRangeComboBox.stringValue

            let selectPages = fileAttribute.fetchSelectPages()
            if selectPages.count != 0 {
                pages = selectPages.map { $0.intValue - 1 }
            } else {
                let alert = NSAlert()
                alert.alertStyle = .critical
                alert.messageText = "\(fileAttribute.filePath.lastPathComponent) \(NSLocalizedString("Invalid page range or the page number is out of range. Please try again.", comment: ""))"
                alert.runModal()
                return
            }
        }

        background.pagesString = pages.isEmpty ? "" : pages.map { "\($0)" }.joined(separator: ",")

        switch type {
        case .add:
            if needSave {
                if checkPageRangeValidate(pageRangeComboBox.stringValue) && pageRangeComboBox.indexOfSelectedItem == -1 {
                    background.pagesString = pageRangeComboBox.stringValue
                }
                KMBackgroundManager.defaultManager.addTemplate(model: background)
            }
            operateCallBack?(background, currentType)
        case .edit:
            if needSave {
                if checkPageRangeValidate(pageRangeComboBox.stringValue) && pageRangeComboBox.indexOfSelectedItem == -1 {
                    background.pagesString = pageRangeComboBox.stringValue
                }
                originalBackground = (background.copy() as? KMBackgroundModel)!
//                KMBackgroundManager.defaultManager.store()
            }
            operateCallBack?(originalBackground, currentType)
        case .use:
            let fileName = "\(pdfDocument.documentURL?.lastPathComponent ?? NSLocalizedString("Untitled", comment: ""))_Background"
            let savePanelAccessoryViewController = KMSavePanelAccessoryController()
            let savePanel = NSSavePanel()
            savePanel.nameFieldStringValue = fileName
            savePanel.allowedFileTypes = ["pdf"]
            savePanel.accessoryView = savePanelAccessoryViewController.view
            savePanel.beginSheetModal(for: window!) { result in
                if result == .OK {
                    self.saveAsPDF(with: self.background, to: savePanel.url?.path ?? "", autoOpen: savePanelAccessoryViewController.openAutomaticButton.state == .on ? true : false)
                }
            }
        }
    }
}