//
//  KMNConvertPDFManager.swift
//  PDF Reader Pro
//
//  Created by 丁林圭 on 2024/10/23.
//

import Cocoa

class KMNConvertTool: NSObject {
    
    static let imageExtensions = ["jpg","cur","bmp","jpeg","gif","png","tiff","tif",/*@"pic",*/"ico","icns","tga","psd","eps","hdr","jp2","jpc","pict","sgi","heic"]
    static let pdfExtensions = ["pdf"]
    static let officeExtensions = ["doc", "docx", "xls", "xlsx", "ppt", "pptx"]
    
    class func supportImageFileType() -> [String] {
        return imageExtensions
    }
    
    class func supportPDFFileType() -> [String] {
        return pdfExtensions
    }
    
    @objc class func isImageType(_ exn: String) -> Bool {
        return KMNConvertTool.imageExtensions.contains(exn.lowercased())
    }
    
    @objc class func isPDFType(_ exn: String) -> Bool {
        return KMNConvertTool.pdfExtensions.contains(exn.lowercased())
    }
    
    @objc class func isOfficeType(_ exn: String) -> Bool {
        return KMNConvertTool.officeExtensions.contains(exn.lowercased())
    }
    
    class func convertOffice(filePath: String, completionBlock:@escaping (String?)->Void) -> Void {
        let today = Date()
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
        let dateString = dateFormatter.string(from: today)
        
        let folderPath = "convertToPDF_office_" + dateString + "." + "pdf"
        
        let savePath: String? = folderPath.kUrlToPDFFolderPath() as String
        
        KMConvertPDFManager.convertFile(filePath, savePath: savePath!) { success, errorDic in
            if errorDic != nil || !success || !FileManager.default.fileExists(atPath: savePath!) {
                
                if FileManager.default.fileExists(atPath: savePath!) {
                    try?FileManager.default.removeItem(atPath: savePath!)
                }
                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()
                completionBlock(nil)
                return
            }
            
            if !savePath!.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()
                completionBlock(nil)
                return
            }
            completionBlock(savePath)
        }
        
    }
    
    class func openDocumentWithImageFromPasteboard(_ pboard: NSPasteboard, error outError: AutoreleasingUnsafeMutablePointer<NSError?>?) -> CPDFDocument? {
        var document: CPDFDocument? = nil
        var data: Data? = nil
        
        if pboard.canReadItem(withDataConformingToTypes: [NSPasteboard.PasteboardType.pdf.rawValue]) {
            data = pboard.data(forType: NSPasteboard.PasteboardType.pdf)
        } else if pboard.canReadItem(withDataConformingToTypes: [NSPasteboard.PasteboardType.postScript.rawValue]) {
            data = pboard.data(forType: NSPasteboard.PasteboardType.postScript)
        } else if pboard.canReadItem(withDataConformingToTypes: [NSPasteboard.PasteboardType.tiff.rawValue]) {
            data = KMNConvertTool.convertTIFFDataToPDF(pboard.data(forType: NSPasteboard.PasteboardType.tiff) ?? Data())
        } else {
            let images = pboard.readObjects(forClasses: [NSImage.self], options: [:])
            let strings = pboard.readObjects(forClasses: [NSAttributedString.self], options: [:])
            if images?.count ?? 0 > 0 {
                data = KMNConvertTool.convertTIFFDataToPDF((images![0] as AnyObject).tiffRepresentation!)
            } else if strings?.count ?? 0 > 0 {
                data = KMOCTool.convertStringsToPDF(withString: strings ?? [""]) // convertStringsToPDF(strings!)
            }
        }
        
        if let data = data {
            document = CPDFDocument(data: data)
            
        } else if let outError = outError {
            outError.pointee = NSError(domain: "SKDocumentErrorDomain", code: 3, userInfo: [NSLocalizedDescriptionKey: NSLocalizedString("Unable to load data from clipboard", comment: "Error description")])
        }
        
        return document
    }
    
    class func convertTIFFDataToPDF(_ tiffData: Data) -> Data? {
        guard let imsrc = CGImageSourceCreateWithData(tiffData as CFData, [kCGImageSourceTypeIdentifierHint: kUTTypeTIFF] as CFDictionary), CGImageSourceGetCount(imsrc) > 0, let cgImage = CGImageSourceCreateImageAtIndex(imsrc, 0, nil) else { return nil }
        let pdfData = NSMutableData(capacity: tiffData.count)
        let consumer = CGDataConsumer(data: pdfData! as CFMutableData)!
        
        var rect = CGRect(x: 0, y: 0, width: CGFloat(cgImage.width), height: CGFloat(cgImage.height))
        let ctxt = CGContext(consumer: consumer, mediaBox: &rect, nil)
        ctxt!.beginPDFPage(nil)
        ctxt!.draw(cgImage, in: rect)
        ctxt!.endPDFPage()
        ctxt!.closePDF()
        
        return pdfData as? Data
    }

}