//
//  KMPDFInsertWindowController.swift
//  PDF Reader Pro
//
//  Created by tangchao on 2023/12/7.
//

import Cocoa

class KMPDFInsertWindowController: KMBaseWindowController {
    @IBOutlet weak var progress: NSProgressIndicator!
    @IBOutlet weak var pageCountLabel: NSTextField!
    @IBOutlet weak var insertTypeLabel: NSTextField!
    @IBOutlet weak var locationLabel: NSTextField!
    @IBOutlet weak var pageRangeLabel: NSTextField!
    
    @IBOutlet weak var pageLabel: NSTextField!
    @IBOutlet weak var pagesText: NSTextField!
    @IBOutlet weak var outputFolderText: NSTextField!
    @IBOutlet weak var blankButton: NSButton!
    @IBOutlet weak var outputFolderButton: NSButton!
    
    @IBOutlet weak var locationFirstButton: NSButton!
    @IBOutlet weak var locationLastButton: NSButton!
    @IBOutlet weak var rangeButton: NSButton!
    @IBOutlet weak var insertButton: NSButton!
    @IBOutlet weak var cancelButton: NSButton!
    
    @IBOutlet weak var selectedPathButton: NSButton!
    @IBOutlet weak var pageRangeBox: NSComboBox!
    @IBOutlet weak var byPageStepper: NSStepper!
    @IBOutlet weak var fromBackView: NSView!
    @IBOutlet weak var insertBox: NSBox!
    
    @IBOutlet weak var whereInsertBox: NSBox!
    @IBOutlet weak var insertLabel: NSTextField!
    @IBOutlet weak var whereInsertLabel: NSTextField!
    @IBOutlet weak var locationRangePopUpButton: NSPopUpButton!
    
    var insertLocation: Int = 0
    var currentPage: Int = 0
    
    private var _pdfDocument: CPDFDocument?
    private var _type: KMPDFEditInsertType = .management
    
    private var _insertPages: [CPDFPage] = []
    private var _fromFilePath: URL?
    private var _password: String?
    private var _fromFilePassword: String?
    
    private var _insertPageIndex = 0
    
    private var _fileAttri: KMFileAttribute?
    
    var callback: KMCommonClickBlock?
    
    convenience init(document: CPDFDocument) {
        self.init(windowNibName: "KMPDFInsertWindowController")
        
        self._type = .pageEdit
        self._pdfDocument = document
    }
    
    convenience init(fileURL documentPath: URL) {
        self.init(windowNibName: "KMPDFInsertWindowController")
        
        self._type = .management
        self.currentPage = 1
        self._pdfDocument = CPDFDocument(url: documentPath)
    }
    
    override func windowDidLoad() {
        super.windowDidLoad()
    
        self._insertPages = []
        self.fromBackView.wantsLayer = true
        self.fromBackView.layer?.borderWidth = 0.8
        self.fromBackView.layer?.cornerRadius = 2.0
        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.isDarkMode() {
            viewColor = NSColor(red: 101.0/255.0, green: 101.0/255.0, blue: 101.0/255.0, alpha: 1)
            viewborderColor = .clear
            textColor = .white
        }
        
        self.fromBackView.layer?.backgroundColor = viewColor.cgColor
        self.fromBackView.layer?.borderColor = viewborderColor.cgColor
        self.outputFolderText.textColor = textColor
        self.selectedPathButton.title = KMLocalizedString("Choose...")
        self.insertLabel.stringValue = KMLocalizedString("Insert")
        
        self.whereInsertLabel.stringValue = KMLocalizedString("Where to insert?")
        self.pageRangeLabel.stringValue = KMLocalizedString("Page Range:")
        self.pageLabel.stringValue = KMLocalizedString("Page")
        
        self.selectedPathButton.isEnabled = false
        self.progress.isHidden = true
        
        self.pageRangeBox.isEditable = false
        self.outputFolderText.isEditable = false
        self.pagesText.isEditable = false
        self.byPageStepper.isEnabled = false
        self.pageRangeLabel.isHidden = true
        self.pageRangeBox.isHidden = true
        
        self.blankButton.title = KMLocalizedString("Blank Page")
        self.locationFirstButton.title = KMLocalizedString("First")
        self.locationLastButton.title = KMLocalizedString("Last")
        self.outputFolderButton.title = KMLocalizedString("From PDF")
        
        self.cancelButton.title = KMLocalizedString("Cancel")
        self.insertButton.title = KMLocalizedString("Insert")
        
        self.pagesText.formatter = TextFieldFormatter()
        self.pagesText.delegate = self
        
        self.pageRangeBox.addItem(withObjectValue: KMLocalizedString("All Pages"))
        self.pageRangeBox.addItem(withObjectValue: KMLocalizedString("Odd Pages Only"))
        self.pageRangeBox.addItem(withObjectValue: KMLocalizedString("Even Pages Only"))
        self.pageRangeBox.addItem(withObjectValue: KMLocalizedString("e.g. 1,3-5,10"))
        (self.pageRangeBox.cell as? NSComboBoxCell)?.placeholderString = KMLocalizedString("e.g. 1,3-5,10")
        self.pageRangeBox.selectItem(at: 0)
        
        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.pageRangeBox.isEnabled = false
        self.locationRangePopUpButton.isEnabled = false
        
        if let data = self._pdfDocument?.isLocked, data {
            Self.checkPassword(url: self._pdfDocument!.documentURL, type: .owner) { [weak self] success, resultPassword in
                if success {
                    self?._pdfDocument?.unlock(withPassword: resultPassword)
                    self?._password = resultPassword
                    
                    self?.pageCountLabel.stringValue = "\(self?._pdfDocument?.pageCount ?? 0)"
                    self?.byPageStepper.minValue = 1
                    self?.byPageStepper.maxValue = Double(self?.pdfDocument?.pageCount ?? 1)
                }
            }
        } 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 buttonItemClicked_Insert(_ sender: AnyObject?) {
        if let data = self._pdfDocument?.isLocked, data {
            self._pdfDocument?.unlock(withPassword: self._password ?? "")
        }
        
        let fromDocument = CPDFDocument(url: self._fromFilePath)
        if let data = fromDocument?.isLocked, data {
            fromDocument?.unlock(withPassword: self._fromFilePassword ?? "")
        }
        
        self.progress.isHidden = false
        self.cancelButton.isEnabled = false
        self.insertButton.isEnabled = false
        self.progress.startAnimation(nil)
        
        var pages: [CPDFPage] = []
        var indexs = IndexSet()
        if (self.blankButton.state == .on) {
            let page = CPDFPage()
            page.setBounds(NSMakeRect(0, 0, 588, 832), for: .cropBox)
            pages.append(page)
        } else {
            if (self.outputFolderText.stringValue.isEmpty) {
                KMAlertTool.runModelForMainThread(message: KMLocalizedString("Select a File"))
                
                self.progress.isHidden = true
                self.cancelButton.isEnabled = true
                self.insertButton.isEnabled = true
                self.progress.stopAnimation(nil)
                return
            }
            
            var fileAttribute = self._fileAttri
            if fileAttribute == nil {
                fileAttribute = KMFileAttribute()
                self._fileAttri = fileAttribute
                
                fileAttribute?.password = self._fromFilePassword ?? ""
                fileAttribute?.filePath =  self.outputFolderText.stringValue
            }

            let item = self.pageRangeBox.indexOfSelectedItem
            if (0 == item) {
                fileAttribute?.bAllPage = true
            } else if(1 == item){
                fileAttribute?.bAllPage = false
                fileAttribute?.pagesType = .odd
                let tDocument = CPDFDocument(url: URL(fileURLWithPath: fileAttribute?.filePath ?? ""))
                var tPagesString = ""
                for i in 0 ..< Int(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 == item){
                fileAttribute?.bAllPage = false
                fileAttribute?.pagesType = .even
                let tDocument = CPDFDocument(url: URL(fileURLWithPath: fileAttribute?.filePath ?? ""))
                var tPagesString = ""
                for i in 0 ..< Int(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.pageRangeBox.stringValue
            }
            if let data = fileAttribute?.fetchSelectPages().isEmpty, data {
                KMAlertTool.runModelForMainThread(message: String(format: "%@ %@", fileAttribute?.filePath.lastPathComponent ?? "", KMLocalizedString("Invalid page range or the page number is out of range. Please try again.")))
                
                self.progress.isHidden = true
                self.cancelButton.isEnabled = true
                self.insertButton.isEnabled = true
                self.progress.stopAnimation(nil)
                return
            } else {
                let insertPDF = CPDFDocument(url: URL(fileURLWithPath: self.outputFolderText.stringValue))
                if let data = insertPDF?.isLocked, data {
                    insertPDF?.unlock(withPassword: self._fromFilePassword ?? "")
                }

                for number in fileAttribute?.fetchSelectPages() ?? [] {
                    if let page = insertPDF?.page(at: UInt(number-1)).copy() as? CPDFPage {
                        pages.append(page)
                        
                        indexs.insert(number-1)
                    }
                }
            }
        }
        
        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)
        
        if (self.blankButton.state == .on) { // 插入空白页
            _ = self._pdfDocument?.insertBlankPage(pageSize: NSMakeSize(588, 832), at: index)
        } else { // 插入文件
            let insertPDF = CPDFDocument(url: URL(fileURLWithPath: self.outputFolderText.stringValue))
//            let result = self._pdfDocument?.importPages(indexs, from: insertPDF, at: UInt(index))
            if let data = insertPDF?.isLocked, data {
                insertPDF?.unlock(withPassword: self._fromFilePassword ?? "")
            }
            let cnt = insertPDF?.pageCount ?? 0
            for i in indexs {
                if i < cnt {
                    let page = insertPDF?.page(at: UInt(i))
                    self._pdfDocument?.insertPageObject(page, at: UInt(index+i))
                }
            }
        }
        
        guard let block = self.callback else {
            return
        }
        block(1, self._pdfDocument, self._password, self._insertPages, self._insertPageIndex)
    }
    
    @IBAction func byPageStepperAction(_ sender: AnyObject?) {
        self.pagesText.stringValue = "\(self.byPageStepper.integerValue)"
    }
    
    @IBAction func buttonItemClicked_InsertType(_ sender: AnyObject?) {
        if self.blankButton.isEqual(to: sender) {
            self.selectedPathButton.isEnabled = false
            self.pageRangeBox.isEnabled = false
            self.pageRangeLabel.isHidden = true
            self.pageRangeBox.isHidden = true
        } else {
            self.pageRangeBox.isEnabled = true
            self.selectedPathButton.isEnabled = true
            self.pageRangeLabel.isHidden = false
            self.pageRangeBox.isHidden = false
        }
    }
    
    @IBAction func buttonItemClicked_Location(_ sender: AnyObject?) {
        if self.rangeButton.isEqual(to: sender) {
            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

        self.km_quick_endSheet()
    }
    
    @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 {
                    guard let pdfDoc = CPDFDocument(url: fileURL) else {
                        continue
                    }
                    
                    if (pdfDoc.isLocked) {
                        Self.checkPassword(url: fileURL, type: .owner) { [weak self] success, resultPassword in
                            if success {
                                self?._fromFilePassword = resultPassword
                                self?._fromFilePath = fileURL
                                self?.outputFolderText.stringValue = self?._fromFilePath?.path ?? ""
                                
                                self?.pageRangeBox.selectItem(at: 0)
                                self?.window?.makeFirstResponder(self)
                                self?.pageRangeBox.isEditable = false
                                self?.pagesText.stringValue = "1"
                                self?.insertButton.isEnabled = true
                            }
                        }
                    } else {
                        self._fromFilePath = fileURL
                        self.outputFolderText.stringValue = self._fromFilePath?.path ?? ""
                        
                        self.pageRangeBox.selectItem(at: 0)
                        self.window?.makeFirstResponder(self)
                        self.pageRangeBox.isEditable = false
                        self.pagesText.stringValue = "1"
                        self.insertButton.isEnabled = true
                    }
                }
            }
        }
    }
   
    @IBAction func after_Action(_ sender: AnyObject?) {
        
    }
    
    @IBAction func before_Action(_ sender: AnyObject?) {
        
    }
    
    @IBAction func comboxClicked_PageRange(_ sender: AnyObject?) {
        if (0 == self.pageRangeBox.indexOfSelectedItem ||
            1 == self.pageRangeBox.indexOfSelectedItem ||
            2 == self.pageRangeBox.indexOfSelectedItem) {
            self.window?.makeFirstResponder(self)
            self.pageRangeBox.isEditable = false
        }else{
            self.pageRangeBox.stringValue = self.pageRangeBox.stringValue
            self.pageRangeBox.isEditable = true
            self.window?.makeFirstResponder(self.pageRangeBox)
        }
    }
}

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