//
//  KMPDFEditInsertPageWindow.swift
//  PDF Reader Pro
//
//  Created by tangchao on 2023/11/13.
//

import Cocoa

enum KMPDFEditInsertType: Int {
    case management = 1
    case pageEdit
}

class KMPDFEditInsertPageWindow: NSWindowController {
    var currentPage: Int = 1
    var insertLocation: Int = 0
    
    @IBOutlet var progress: NSProgressIndicator!
    @IBOutlet var pageCountLabel: NSTextField!
    @IBOutlet var pageLabel: NSTextField!
    @IBOutlet var pagesText: NSTextField!
    @IBOutlet var outputFolderText: NSTextField!
    
    @IBOutlet var locationFirstButton: NSButton!
    @IBOutlet var locationLastButton: NSButton!
    @IBOutlet var rangeButton: NSButton!
    @IBOutlet var insertButton: NSButton!
    @IBOutlet var cancelButton: NSButton!
    @IBOutlet var selectedPathButton: NSButton!
    
    @IBOutlet var byPageStepper: NSStepper!
    @IBOutlet var whereInsertBox: NSBox!
    @IBOutlet var insertLabel: NSTextField!
    @IBOutlet var whereInsertLabel: NSTextField!
    @IBOutlet var locationRangePopUpButton: NSPopUpButton!
    
    @IBOutlet var allPageButton: NSButton!
    @IBOutlet var singlePageButton: NSButton!
    @IBOutlet var doublePageButton: NSButton!
    @IBOutlet var customPageButton: NSButton!
    @IBOutlet var customTextField: NSTextField!
    @IBOutlet var rangeTextField: NSTextField!
    
    weak var pdfDocument: CPDFDocument?
    var insertDocument: CPDFDocument?
    var type: KMPDFEditInsertType = .management
    var fromFilePath: URL?
    
    private var _insertPages: [CPDFPage] = []
    private var _selectPagesIndex: Int = 0
    private var _password: String = ""
    private var _fromFilePassword: String = ""
    private var _insertPageIndex: Int = 0
    
    var callback: ((CPDFDocument?, NSString?, [CPDFPage]?, Int) -> Void)?
    
    var fileAttribute = KMFileAttribute()
    
    convenience init(document: CPDFDocument, path: URL, password: String? = nil) {
        self.init(windowNibName: "KMPDFEditInsertPageWindow")
        
        self.insertDocument = CPDFDocument(url: path)
        if let data = self.insertDocument?.isLocked, data {
            self.insertDocument?.unlock(withPassword: password ?? "")
        }
        
        self.fromFilePath = path
        self.type = .pageEdit
        self.pdfDocument = document
    }
    
    convenience init(documentPath: URL) {
        self.init(windowNibName: "KMPDFEditInsertPageWindow")
        
        self.type = .management
        self.currentPage = 1
        self.pdfDocument = CPDFDocument(url: documentPath)
        
    }

    override func windowDidLoad() {
        super.windowDidLoad()
    
        self._insertPages = []

        var viewColor = NSColor.white
        var viewborderColor = NSColor(red: 195.0/255.0, green: 195.0/255.0, blue: 195.0/255.0, alpha: 1)
        var textColor = NSColor(red: 51.0/255.0, green: 51.0/255.0, blue: 51.0/255.0, alpha: 1)

        if KMAppearance.isSupportNewColor() {
            if KMAppearance.isDarkMode() {
                viewColor = NSColor(red: 101.0/255.0, green: 101.0/255.0, blue: 101.0/255.0, alpha: 1)
                viewborderColor = NSColor.clear
                textColor = .white
            }
        }
        
        self.outputFolderText.textColor = textColor
        self.selectedPathButton.title = KMLocalizedString("Choose...")
        self.whereInsertLabel.stringValue = KMLocalizedString("Where to insert?")
        self.pageLabel.stringValue = KMLocalizedString("Page")
        
        self.progress.isHidden = true
        
        self.outputFolderText.isEditable = false
        self.pagesText.isEditable = false
        self.byPageStepper.isEnabled = false
        
        self.locationFirstButton.title = KMLocalizedString("First")
        self.locationLastButton.title = KMLocalizedString("Last")
        self.cancelButton.title = KMLocalizedString("Cancel")
        self.insertButton.title = KMLocalizedString("Insert")
        
        self.pagesText.formatter = TextFieldFormatter()
        self.pagesText.delegate = self
            
        self.allPageButton.title = KMLocalizedString("All Pages")
        self.singlePageButton.title = KMLocalizedString("Odd Pages Only")
        self.doublePageButton.title = KMLocalizedString("Even Pages Only")
        self.rangeTextField.placeholderString = KMLocalizedString("e.g. 1,3-5,10")
        self.insertLabel.stringValue = KMLocalizedString("Page Range")
        
        if(self.type == .pageEdit) {
            self.customTextField.stringValue = String(format: "/ %ld", self.insertDocument?.pageCount ?? 0)
            self.outputFolderText.stringValue = self.fromFilePath?.path ?? ""
        }
        self._selectPagesIndex = 0
        self.rangeTextField.isEnabled = self.customPageButton.state == .on
        self.allPageButton.state = .on
        
        let menu = NSMenu()
        _ = menu.addItem(title: KMLocalizedString("After"), action: #selector(after_Action), target: self)
        _ = menu.addItem(title: KMLocalizedString("Before"), action: #selector(before_Action), target: self)
        self.locationRangePopUpButton.menu = menu
        
        self.outputFolderText.placeholderString = KMLocalizedString("Select a File")
        
        self.locationRangePopUpButton.isEnabled = false
        
        if let data = self.pdfDocument?.isLocked, data {
            DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
                KMBaseWindowController.checkPassword(url: self.pdfDocument!.documentURL, type: .owner) { success, resultPassword in
                    if (resultPassword.isEmpty == false) {
                        self.pdfDocument?.unlock(withPassword: resultPassword)
                        self._password = resultPassword

                        self.pageCountLabel.stringValue = String(format: "/%ld", self.pdfDocument?.pageCount ?? 0)
                        self.byPageStepper.minValue = 1.0
                        self.byPageStepper.maxValue = Double(self.pdfDocument?.pageCount ?? 0)
                    }
                }
            }
        } else {
            self.byPageStepper.minValue = 1.0
            self.byPageStepper.maxValue = Double(self.pdfDocument?.pageCount ?? 0)
            self.pageCountLabel.stringValue = String(format: "/%ld", self.pdfDocument?.pageCount ?? 0)
        }
        
        if (self.insertLocation == 2) {
            self.locationLastButton.state = .on
        } else if (self.insertLocation == 3) {
            self.rangeButton.state = .on
            self.locationRangePopUpButton.isEnabled = true
            self.pagesText.isEditable = true
            self.byPageStepper.isEnabled = true
        } else {
            self.locationFirstButton.state = .on
        }
        self.pagesText.stringValue = String(format: "%ld", self.currentPage)
        self.byPageStepper.integerValue = Int(self.pagesText.stringValue) ?? 0
    }
    
    @IBAction func byPageStepperAction(_ sender: AnyObject) {
        self.pagesText.stringValue = "\(self.byPageStepper.integerValue)"
    }
    
    @IBAction func buttonItemClicked_Location(_ sender: NSButton) {
        if (sender == self.rangeButton) {
            self.pagesText.isEditable = true
            self.locationRangePopUpButton.isEnabled = true
            self.byPageStepper.isEnabled = true
        } else {
            self.pagesText.isEditable = false
            self.locationRangePopUpButton.isEnabled = false
            self.byPageStepper.isEnabled = false
        }
    }
    
    @IBAction func buttonItemClicked_Cancel(_ sender: AnyObject) {
        self.pdfDocument = nil
        
        guard let block = self.callback else {
            return
        }
        block(nil, nil, nil, 0)
    }
    
    @IBAction func buttonItemClicked_Insert(_ sender: AnyObject) {
        if (self.insertDocument == nil) {
            return
        }
        
        let fromDocument = CPDFDocument(url: self.fromFilePath)
        if let data = (fromDocument?.isLocked), data {
            fromDocument?.unlock(withPassword: self.insertDocument?.password ?? "")
        }
         
        self.progress.isHidden = false
        self.cancelButton.isEnabled = false
        self.insertButton.isEnabled = false
        self.progress.startAnimation(nil)
        
        var pages: [CPDFPage] = []
        
        if self.outputFolderText.stringValue == "" || self.outputFolderText.stringValue.isEmpty {
            let alert = NSAlert()
            alert.alertStyle = .critical
            alert.messageText = KMLocalizedString("Select a File")
            alert.runModal()

            self.progress.isHidden = true
            self.cancelButton.isEnabled = true
            self.insertButton.isEnabled = true
            self.progress.stopAnimation(nil)
            return
        }

        let fileAttribute = KMFileAttribute()
        self.fileAttribute = fileAttribute
        fileAttribute.password = self.insertDocument?.password ?? ""
        fileAttribute.filePath =  self.outputFolderText.stringValue
        

        if ((0 == self._selectPagesIndex)) {
            fileAttribute.bAllPage = true
            fileAttribute.pagesType = .all
        } else if(1 == self._selectPagesIndex){
            fileAttribute.bAllPage = false
            fileAttribute.pagesType = .odd
            let tDocument = CPDFDocument(url: URL(fileURLWithPath: fileAttribute.filePath))
            var tPagesString = ""
            for i in 0 ..< (tDocument?.pageCount ?? 0) {
                if (i%2 == 0) {
                    if (tPagesString.isEmpty) {
                        tPagesString.append("\(i+1)")
                    }else{
                        tPagesString.append(",\(i+1)")
                    }
                }
            }
            fileAttribute.pagesString = tPagesString
        } else if (2 == self._selectPagesIndex){
            fileAttribute.bAllPage = false
            fileAttribute.pagesType = .even
            let tDocument = CPDFDocument(url: URL(fileURLWithPath: fileAttribute.filePath))
            var tPagesString = ""
            for i in 0 ..< (tDocument?.pageCount ?? 0) {
                if (i%2 == 1) {
                    if (tPagesString.isEmpty) {
                        tPagesString.append("\(i+1)")
                    }else{
                        tPagesString.append(",\(i+1)")
                    }
                }
            }
            fileAttribute.pagesString = tPagesString
        } else {
            fileAttribute.bAllPage = false
            fileAttribute.pagesType = .custom
            fileAttribute.pagesString = self.rangeTextField.stringValue
        }
        if (fileAttribute.fetchSelectPages().isEmpty) {
            let alert = NSAlert()
            alert.alertStyle = .critical
            alert.messageText = String(format: "%@ %@", fileAttribute.filePath.lastPathComponent, KMLocalizedString("Invalid page range or the page number is out of range. Please try again."))
            alert.runModal()

            self.progress.isHidden = true
            self.cancelButton.isEnabled = true
            self.insertButton.isEnabled = true
            self.progress.stopAnimation(nil)
            return
        } else {
            for number in fileAttribute.fetchSelectPages() {
//                let page = self.insertDocument?.page(at: UInt(number.intValue-1)).copy()
//                pages.append(page as! CPDFPage)
            }
        }

        var index = 0
        if (self.locationFirstButton.state == .on) {
            index = 0
        } else if (self.locationLastButton.state == .on) {
            index =  Int(self.pdfDocument?.pageCount ?? 0)
        } else {
            index = Int(self.pagesText.stringValue) ?? 0
            if ((1 == self.locationRangePopUpButton.indexOfSelectedItem)) {
                index = index - 1
            }
        }

        for page in pages {
            self._insertPages.append(page)
        }
        self._insertPageIndex = index

        self.progress.isHidden = true
        self.cancelButton.isEnabled = true
        self.insertButton.isEnabled = true
        self.progress.stopAnimation(nil)
        
        guard let block = self.callback else {
            return
        }
        block(self.pdfDocument, self._password as NSString, self._insertPages, self._insertPageIndex)
    }
    
    @IBAction func buttonItemClicked_OutputFolder(_ sender: AnyObject) {
        let openPanel = NSOpenPanel()
        openPanel.allowedFileTypes = ["pdf"]
        openPanel.beginSheetModal(for: self.window!) { result in
            if (result == .OK) {
                for fileURL in openPanel.urls {
                    let pdfDoc = CPDFDocument(url: fileURL)
                    if let data = pdfDoc?.isLocked, data {
                        DispatchQueue.main.asyncAfter(deadline: .now()+0.5) {
                            KMBaseWindowController.checkPassword(url: fileURL, type: .owner) { result, pwd in
                                if (pwd.isEmpty == false) {
                                    self._password = pwd
                                    self.fromFilePath = fileURL
                                    self.insertDocument = CPDFDocument(url: fileURL)
                                    if let data = self.insertDocument?.isLocked, data {
                                        self.insertDocument?.unlock(withPassword: pwd)
                                    }
                                    self.customTextField.stringValue = String(format: "/ %ld", self.insertDocument?.pageCount ?? 0)
                                    self.outputFolderText.stringValue = self.fromFilePath?.path ?? ""

                                    self.window?.makeFirstResponder(self)
                                    self.pagesText.stringValue = "1"
                                    self.insertButton.isEnabled = true
                                }
                            }
                        }
                    } else {
                        self.fromFilePath = fileURL
                        self.outputFolderText.stringValue = self.fromFilePath?.path ?? ""
                        self.insertDocument = CPDFDocument(url: fileURL)
                        self.customTextField.stringValue = String(format: "/ %ld", self.insertDocument?.pageCount ?? 0)
                        self.window?.makeFirstResponder(self)
                    
                        self.pagesText.stringValue = "1"
                        self.insertButton.isEnabled = true
                    }
                }
            }
        }
    }
    
    @IBAction func customPageButton_Action(_ sender: NSButton) {
        self.allPageButton.state = .off
        self.singlePageButton.state = .off
        self.doublePageButton.state = .off
        self.customPageButton.state  = .off
        
        sender.state = .on
        self.rangeTextField.isEnabled = false
        self.customTextField.textColor = NSColor.disabledControlTextColor
        self._selectPagesIndex = sender.tag
        if (sender.tag == 3) {
            self.rangeTextField.isEnabled = true
            self.customTextField.textColor = NSColor.labelColor
            self.window?.makeFirstResponder(self.rangeTextField)
            
            if(self.rangeTextField.stringValue.isEmpty) {
                return
            }
        }
    }
    
    override func keyDown(with event: NSEvent) {
        super.keyDown(with: event)
        
        self.window?.makeFirstResponder(nil)
    }
    
    @IBAction func after_Action(_ sender: AnyObject?) {
        
    }

    @IBAction func before_Action(_ sender: AnyObject?) {
        
    }
}

extension KMPDFEditInsertPageWindow: NSTextFieldDelegate {
    func controlTextDidChange(_ obj: Notification) {
        let textField = obj.object as? NSTextField
        if (self.pagesText.isEqual(to: textField)) {
            if let data = Int(textField!.stringValue), data <= 0 {
                self.pagesText.stringValue = "1"
                self.byPageStepper.integerValue = 1
            } else if let data = textField?.stringValue.stringToCGFloat(), data > self.byPageStepper.maxValue {
                self.pagesText.stringValue = String(format: "%.0f", self.byPageStepper.maxValue)
                self.byPageStepper.integerValue = Int(self.byPageStepper.maxValue)
            } else {
                self.byPageStepper.integerValue = Int(self.pagesText.stringValue) ?? 0
            }
        }
    }
}

// MARK: - Private Methods

extension KMPDFEditInsertPageWindow {
    /*
     #pragma mark Private methor
     - (void)viewFileAtFinder:(NSString *)filePath
     {
         NSWorkspace *workspace = [NSWorkspace sharedWorkspace];
         NSURL *url = [NSURL fileURLWithPath:filePath];
         [workspace activateFileViewerSelectingURLs:[NSArray arrayWithObject:url]];
     }
     */
}