//
//  KMAIOpenPDFFilesVC.swift
//  PDF Reader Pro
//
//  Created by wanjun on 2023/5/22.
//

import Cocoa

class KMAIOpenPDFFilesVC: NSViewController {
    
    @IBOutlet weak var openPDFFilesLabel: NSTextField!
    @IBOutlet weak var openPDFFilesImageView: NSImageView!
    @IBOutlet weak var selectYourFilesBox: KMBox!
    @IBOutlet weak var selectYourFilesLabel: NSTextField!
    @IBOutlet weak var selectYourFilesImageView: NSImageView!
    @IBOutlet weak var orDropFilesHereToOpenLabel: NSTextField!

    @IBOutlet weak var creatPDFLabel: NSTextField!
    @IBOutlet weak var newFromFilesLabel: NSTextField!
    @IBOutlet weak var newFromFilesImageView: NSImageView!
    @IBOutlet weak var newBlankPageLabel: NSTextField!
    @IBOutlet weak var newBlankPageImageView: NSImageView!
    @IBOutlet weak var importFromScannerLabel: NSTextField!
    @IBOutlet weak var importFromScannerImageView: NSImageView!
    var deviceBrowserWC: KMDeviceBrowserWindowController?
    
    @IBOutlet weak var leftBox: NSBox!
    @IBOutlet weak var rightBox: NSBox!
    @IBOutlet weak var leftBoxRightConstraint: NSLayoutConstraint!
    @IBOutlet weak var rightBoxLeftConstraint: NSLayoutConstraint!
    @IBOutlet weak var rightBoxTopConstraint: NSLayoutConstraint!
    @IBOutlet weak var rightBoxHeightConstraint: NSLayoutConstraint!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do view setup here.
        
        self.initLocalization()
        self.initializeUI()
    }
    
    
    // MARK: initialize
    
    func initializeUI() -> Void {
        self.openPDFFilesLabel.textColor = NSColor.km_init(hex: "#252629")
        self.openPDFFilesLabel.font = NSFont.SFProTextSemiboldFont(20.0)
        self.openPDFFilesImageView.image = NSImage(named: "icon_empty_addFiles")
        self.selectYourFilesBox.cornerRadius = 4.0
        self.selectYourFilesBox.fillColor = NSColor.km_init(hex: "#1770F4")
        self.selectYourFilesLabel.textColor = NSColor.km_init(hex: "#FFFFFF")
        self.selectYourFilesLabel.font = NSFont.SFProTextRegularFont(16.0)
        self.selectYourFilesImageView.image = NSImage(named: "icon_SelectYourFiles")
        self.orDropFilesHereToOpenLabel.textColor = NSColor.km_init(hex: "#616469")
        self.orDropFilesHereToOpenLabel.font = NSFont.SFProTextRegularFont(14.0)
        
        self.creatPDFLabel.textColor = NSColor.km_init(hex: "#252629")
        self.creatPDFLabel.font = NSFont.SFProTextSemiboldFont(20.0)
        self.newFromFilesLabel.textColor = NSColor.km_init(hex: "#252629")
        self.newFromFilesLabel.font = NSFont.SFProTextRegularFont(16.0)
        self.newFromFilesImageView.image = NSImage(named: "icon_empty_NewFromFiles")
        self.newBlankPageLabel.textColor = NSColor.km_init(hex: "#252629")
        self.newBlankPageLabel.font = NSFont.SFProTextRegularFont(16.0)
        self.newBlankPageImageView.image = NSImage(named: "icon_empty_NewBlackPage")
        self.importFromScannerLabel.textColor = NSColor.km_init(hex: "#252629")
        self.importFromScannerLabel.font = NSFont.SFProTextRegularFont(16.0)
        self.importFromScannerImageView.image = NSImage(named: "icon_empty_ImportFromScanner")
        
        self.selectYourFilesBox.moveCallback = { [weak self](mouseEntered: Bool, mouseBox: KMBox) -> Void in
            if mouseEntered {
                self?.selectYourFilesBox.fillColor = NSColor.km_init(hex: "#3F8FF6")
            } else {
                self?.selectYourFilesBox.fillColor = NSColor.km_init(hex: "#1770F4")
            }
        }
        self.selectYourFilesBox.downCallback = { [weak self](downEntered: Bool, mouseBox: KMBox, event) -> Void in
            if downEntered {
                self?.openPDFButtonAction()
            }
        }

    }
    
    func initLocalization() -> Void {
        self.openPDFFilesLabel.stringValue = NSLocalizedString("Open PDF Files", comment: "")
        self.selectYourFilesLabel.stringValue = NSLocalizedString("Select Your Files", comment: "")
        self.orDropFilesHereToOpenLabel.stringValue = NSLocalizedString("or drop files here to open", comment: "")
        self.creatPDFLabel.stringValue = NSLocalizedString("Create PDF", comment: "")
        self.newFromFilesLabel.stringValue = NSLocalizedString("New From Files", comment: "")
        self.newBlankPageLabel.stringValue = NSLocalizedString("New Blank Page", comment: "")
        self.importFromScannerLabel.stringValue = NSLocalizedString("Import From Scanner", comment: "")
    }
    
    // MARK: Private Methods
    
    func imageToJPG(filePath: String, savePath: String) -> String {
        if NSString(string: NSString(string: filePath).lastPathComponent).pathExtension == "png" ||
           NSString(string: NSString(string: filePath).lastPathComponent).pathExtension == "PNG" {
            let imageName = NSString(string: NSString(string: filePath).lastPathComponent).deletingPathExtension

            let jpgPath = self.fetchDifferentFilePath(filePath: savePath + "/" + imageName + ".jpg")
            if (!FileManager.default.fileExists(atPath: jpgPath as String)) {
                FileManager.default.createFile(atPath: jpgPath as String, contents: nil)
            }

            // 加载 PNG 图像
            guard let pngImage = NSImage(contentsOfFile: filePath) else {
                KMPrint("Failed to load PNG image")
                return filePath
            }

            // 创建 NSBitmapImageRep 对象，并将 PNG 图像绘制到其中
            let bitmap = NSBitmapImageRep(data: pngImage.tiffRepresentation!)
            let rect = NSRect(origin: .zero, size: bitmap!.size)
            bitmap?.draw(in: rect)

            // 将 PNG 图像数据转换为 JPG 图像数据
            guard let jpgData = bitmap?.representation(using: .jpeg, properties: [:]) else {
                KMPrint("Failed to convert PNG to JPG")
                return filePath
            }

            // 保存 JPG 图像数据到文件
            let fileURL = URL(fileURLWithPath: jpgPath)
            do {
                try jpgData.write(to: fileURL)
                KMPrint("JPG image saved successfully")
                return fileURL.path
            } catch {
                KMPrint("Failed to save JPG image: \(error.localizedDescription)")
                return filePath
            }
        }
        
        return filePath
    }
    
    func openImageFile(url: URL) -> Void {
        let filePath = url.path
        
        let fileName: NSString = url.lastPathComponent as NSString
        let savePath = fetchUniquePath(fileName.kUrlToPDFFolderPath() as String).deletingLastPathComponent

        let imageName = NSString(string: NSString(string: filePath).lastPathComponent).deletingPathExtension
        
        let path = self.fetchDifferentFilePath(filePath: savePath + "/" + imageName + ".pdf")
        
        if (!FileManager.default.fileExists(atPath: path.deletingLastPathComponent as String)) {
            try?FileManager.default.createDirectory(atPath: path.deletingLastPathComponent as String, withIntermediateDirectories: true, attributes: nil)
        }
        
        if (!FileManager.default.fileExists(atPath: path as String)) {
            FileManager.default.createFile(atPath: path as String, contents: nil)
        }

        let document = CPDFDocument.init()
        var success = false
        
        let jpgPath = self.imageToJPG(filePath: filePath, savePath: savePath)

        //FIXME: 无法插入图片
        let image = NSImage(contentsOfFile: jpgPath)
        let insertPageSuccess = document?.insertPage(image!.size, withImage: jpgPath, at: document!.pageCount)
        if insertPageSuccess != nil {
            //信号量控制异步
            let semaphore = DispatchSemaphore(value: 0)
            DispatchQueue.global().async {
                success = ((document?.write(toFile: path)) != nil)
                semaphore.signal()
            }
            semaphore.wait()
        } else {
        }
        if success {
            if !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: URL(fileURLWithPath: path), display: true) { document, documentWasAlreadyOpen, error in
                if error != nil {
                    NSApp.presentError(error!)
                    return
                }
            }
        }
    }
    
    func openOfficeFile(url: URL) -> Void {
        let filePath = url.path
        let folderPath = "convertToPDF.pdf"
        let savePath = folderPath.kUrlToPDFFolderPath()
        
        if (!FileManager.default.fileExists(atPath: savePath.deletingLastPathComponent as String)) {
            try?FileManager.default.createDirectory(atPath: savePath.deletingLastPathComponent as String, withIntermediateDirectories: true, attributes: nil)
        }
        
        if (!FileManager.default.fileExists(atPath: savePath as String)) {
            FileManager.default.createFile(atPath: savePath as String, contents: nil)
        }

        if savePath == nil {
            return
        }
        KMConvertPDFManager.convertFile(filePath, savePath: savePath as String) { success, errorDic in
            if errorDic != nil || !success || !FileManager.default.fileExists(atPath: savePath as String) {
                if FileManager.default.fileExists(atPath: savePath as String) {
                    try?FileManager.default.removeItem(atPath: savePath as String)
                }
                let alert = NSAlert.init()
                alert.alertStyle = .critical
                var infoString = ""
                if errorDic != nil {
                    for key in (errorDic! as Dictionary).keys {
                        infoString = infoString.appendingFormat("%@\n", errorDic![key] as! CVarArg)
                    }
                }
                alert.informativeText = NSLocalizedString("Please install Microsoft Office to create PDFs from Office files", comment: "")
                alert.messageText = NSLocalizedString("Failed to Create PDF", comment: "")
                alert.addButton(withTitle: NSLocalizedString("OK", comment: ""))
                alert.runModal()
                return
            }
            
            if !(savePath as String).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: URL(fileURLWithPath: savePath as String), display: true) { document, documentWasAlreadyOpen, error in
                if error != nil {
                    NSApp.presentError(error!)
                    return
                }
            }
        }
    }
    
    func fetchUniquePath(_ originalPath: String) -> String {
        var path = originalPath
        let dManager = FileManager.default
        if !dManager.fileExists(atPath: path) {
            if path.extension.count < 1 {
                path = path.stringByAppendingPathExtension("pdf")
            }
            return path
        } else {
            let originalFullFileName = path.lastPathComponent
            let originalFileName = path.lastPathComponent.deletingPathExtension.lastPathComponent
            let originalExtension = path.extension

            let startIndex: Int = 0
            let endIndex: Int = startIndex + originalPath.count - originalFullFileName.count - 1
            let fileLocatePath = originalPath.substring(to: endIndex)
            var i = 1
            while (1 != 0) {
                var newName = String(format: "%@%ld", originalFileName, i)
                newName = String(format: "%@%@", newName, originalExtension)
                let newPath = fileLocatePath.stringByAppendingPathComponent(newName)
                if !dManager.fileExists(atPath: newPath) {
                    return newPath
                } else {
                    i+=1
                    continue
                }
            }
        }
    }
    
    func fetchDifferentFilePath(filePath: String) -> String {
        var resultFilePath = filePath
        var index: Int = 0
        while (FileManager.default.fileExists(atPath: resultFilePath)) {
            index += 1
            let path = NSString(string: filePath).deletingPathExtension + "(" + String(index) + ")"
            resultFilePath = NSString(string: path).appendingPathExtension(NSString(string: filePath).pathExtension)!
        }
        
        return resultFilePath;
    }
    
    func openFile(withFilePath path: URL) -> Void {
        let type = path.pathExtension.lowercased()
        if (type == "pdf") {
            if !path.path.isPDFValid() {
                let alert = NSAlert()
                alert.alertStyle = .critical
                alert.messageText = NSLocalizedString("This file format is not supported, please drag in PDF, picture, Office format files", comment: "")
                alert.runModal()
                return
            }
            NSDocumentController.shared.openDocument(withContentsOf: path, display: true) { document, documentWasAlreadyOpen, error in
                if error != nil {
                    NSApp.presentError(error!)
                    return
                }
            }
        } else if (type == "jpg") ||
                  (type == "cur") ||
                  (type == "bmp") ||
                  (type == "jpeg") ||
                  (type == "gif") ||
                  (type == "png") ||
                  (type == "tiff") ||
                  (type == "tif") ||
                  (type == "ico") ||
                  (type == "icns") ||
                  (type == "tga") ||
                  (type == "psd") ||
                  (type == "eps") ||
                  (type == "hdr") ||
                  (type == "jp2") ||
                  (type == "jpc") ||
                  (type == "pict") ||
                  (type == "sgi") ||
                  (type == "heic") {
            openImageFile(url: path)
        } else if (type == "doc") ||
                  (type == "docx") ||
                  (type == "xls") ||
                  (type == "xlsx") ||
                  (type == "ppt") ||
                  (type == "pptx") ||
                  (type == "pptx") {
            let fileName: NSString = String(format: "%@.pdf", NSLocalizedString("Untitled", comment: "")) as NSString
            let savePath = fetchUniquePath(fileName.kUrlToPDFFolderPath() as String)
            openOfficeFile(url: path)
        }
    }
    
    func refreshLayout(isLimit limit: Bool) -> Void {
        if limit {
            if self.rightBoxTopConstraint != nil {
                self.rightBoxTopConstraint.constant = 348 + 40
            }
            if self.leftBoxRightConstraint != nil {
                self.leftBoxRightConstraint.constant = 32
            }
            if self.rightBoxLeftConstraint != nil {
                self.rightBoxLeftConstraint.constant = 32
            }
            if self.rightBoxHeightConstraint != nil {
                self.rightBoxHeightConstraint.constant = leftBox.frame.width
            }
        } else {
            if self.rightBoxTopConstraint != nil {
                self.rightBoxTopConstraint.constant = 40
            }
            if self.leftBoxRightConstraint != nil {
                self.leftBoxRightConstraint.constant = 380
            }
            if self.rightBoxLeftConstraint != nil {
                self.rightBoxLeftConstraint.constant = 32 + leftBox.frame.width + 20
            }
            if self.rightBoxHeightConstraint != nil {
                self.rightBoxHeightConstraint.constant = 328
            }
        }
    }
    
    // MARK: Action
    
    @IBAction func createPDFAction(_ sender: NSButton) {
        let tag = sender.tag;
        if tag == 0 {
            // New From Files
            self.trackEvent_create(eventName: "New From File")
            
            self.openSupportPDFButtonAction()
        } else if tag == 1 {
            // New Blank Page
            self.trackEvent_create(eventName: "New Blank Page")
            
            self.openBlankPage("")
        } else if tag == 2 {
            // Import From Scanner
            self.trackEvent_create(eventName: "Import From Scanner")
            
            self.importFromScanner("")
        }
    }
    
    func openPDFButtonAction() {
        NSOpenPanel.km_open_pdf_multi_success(self.view.window!, panel: nil) { urls in
            for url in urls {
                if !url.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()
                } else {
                    NSDocumentController.shared.openDocument(withContentsOf: url, display: true) { document, documentWasAlreadyOpen, error in
                        if error != nil {
                            NSApp.presentError(error!)
                        } else {
                            
                        }
                    }
                }
            }
        }
    }
    
    func openSupportPDFButtonAction() {
        var window = self.view.window
        if (window == nil) {
            window = NSApp.mainWindow
        }
        NSPanel.km_open_multi_success(window!) { panel in
            var array: [String] = []
            for fileType in KMConvertPDFManager.supportFileType() {
                if let string = fileType as? String {
                    array.append(string)
                }
            }
            panel.allowedFileTypes = KMTools.pdfExtensions + array
        } completion: { urls in
            for url in urls {
                let type = url.pathExtension.lowercased()
                if (type == "pdf" || type == "PDF") {
                    NSDocumentController.shared.km_safe_openDocument(withContentsOf: url, display: true) { _, _, _ in
                        
                    }
                } else if (type == "jpg") ||
                            (type == "cur") ||
                            (type == "bmp") ||
                            (type == "jpeg") ||
                            (type == "gif") ||
                            (type == "png") ||
                            (type == "tiff") ||
                            (type == "tif") ||
                            (type == "ico") ||
                            (type == "icns") ||
                            (type == "tga") ||
                            (type == "psd") ||
                            (type == "eps") ||
                            (type == "hdr") ||
                            (type == "jp2") ||
                            (type == "jpc") ||
                            (type == "pict") ||
                            (type == "sgi") ||
                            (type == "heic") {
                    self.openImageFile(url: url)
                } else if (type == "doc") ||
                            (type == "docx") ||
                            (type == "xls") ||
                            (type == "xlsx") ||
                            (type == "ppt") ||
                            (type == "pptx") ||
                            (type == "pptx") {
                    self.openOfficeFile(url: url)
                }
            }
        }
    }
    
    @IBAction func openBlankPage(_ sender: Any) {
        let fileName: NSString = String(format: "%@.pdf", NSLocalizedString("Untitled", comment: "")) as NSString
        let savePath = fetchUniquePath(fileName.kUrlToPDFFolderPath() as String)
        if (!FileManager.default.fileExists(atPath: savePath.deletingLastPathComponent as String)) {
            try?FileManager.default.createDirectory(atPath: savePath.deletingLastPathComponent as String, withIntermediateDirectories: true, attributes: nil)
        }
        
        if (!FileManager.default.fileExists(atPath: savePath as String)) {
            FileManager.default.createFile(atPath: savePath as String, contents: nil)
        }
        let pdfDocument = CPDFDocument()
        pdfDocument?.insertPage(CGSize(width: 595, height: 842), at: 0)
        pdfDocument?.write(to: URL(fileURLWithPath: savePath))
        NSDocumentController.shared.openDocument(withContentsOf: URL(fileURLWithPath: savePath), display: true) { document, documentWasAlreadyOpen, error in
            if error != nil {
                NSApp.presentError(error!)
            } else {
                if document is KMMainDocument {
                    let newDocument = document
                    (newDocument as! KMMainDocument).isNewCreated = true
                }
            }
        }
    }
    
    @IBAction func importFromScanner(_ sender: Any) {
        deviceBrowserWC = KMDeviceBrowserWindowController.shared
        deviceBrowserWC!.type = .scanner
        deviceBrowserWC!.importScannerFileCallback = { [weak self](url: NSURL) -> Void in
            self?.openFile(withFilePath: url as URL)
        }
        deviceBrowserWC!.showWindow(NSApp.mainWindow)
    }

}

// MARK: - Analytics (埋点)

extension KMAIOpenPDFFilesVC {
    func trackEvent_create(eventName: String) -> Void {
        KMAnalytics.trackEvent(eventName: eventName, parameters: [
            KMAnalytics.Parameter.categoryKey : KMAnalytics.Category.home,
            KMAnalytics.Parameter.labelKey : KMAnalytics.Label.create_Btn], platform: .AppCenter, appTarget: .all)
    }
}