//
//  CustomStampWindowController.swift
//  PDF Reader Pro
//
//  Created by Niehaoyu on 2024/6/19.
//

import Cocoa

class CustomStampWindowController: NSWindowController, CPDFViewDelegate, CPDFListViewDelegate, NSWindowDelegate {

    @IBOutlet var contendView: NSView!
    @IBOutlet var leftContendView: NSView!
    @IBOutlet var pdfContendView: NSView!
    @IBOutlet var rightContendView: NSView!
    @IBOutlet var topContendView: NSView!
    
    @IBOutlet var cancelButton: NSButton!
    @IBOutlet var addStampButton: NSButton!
    
    var topToolbar: CustomStampTopToolbar!
    var leftToolbar: CustomStampLeftToolbar!
    var pdfView: CPDFListView!
    var rightToolbar: CustomStampRightToolbar!
    
    var eventMonitor: Any?
    
    static var currentWindowController: CustomStampWindowController!
    
    var stampListWC: CSStampListWindowController!
    
    var clickHandle: ((_ windowVC: CustomStampWindowController, _ actionType: Int, _ resultImage: NSImage?)->Void)?
    
    @objc static func currentWC() -> CustomStampWindowController {
        if currentWindowController != nil {
            return currentWindowController
        } else {
            let configWC: CustomStampWindowController = CustomStampWindowController.init(windowNibName: "CustomStampWindowController")
            currentWindowController = configWC;
            return currentWindowController
        }
    }
    
    deinit {
        NotificationCenter.default.removeObserver(self)
        print("\(self.className) deinit")
    }
    
    override func windowDidLoad() {
        super.windowDidLoad()

        // Implement this method to handle any initialization after your window controller's window has been loaded from its nib file.
        
        self.window?.delegate = self
        self.window?.title = NSLocalizedString("Create Custom Stamp", comment: "")
        
        self.addEventMonitor()
        
        self.configPDFContendView()
        
        self.configTopToolbar()
        self.configLeftToolbar()
        self.configRightToolbar()
        
        self.cancelButton.title = NSLocalizedString("Cancel", comment: "")
        self.addStampButton.title = NSLocalizedString("Add Stamp", comment: "")
        
        self.updateViewColor()
        
        self.window?.makeFirstResponder(self.pdfView)
    }
    
    func reloadData() {
        
        self.topToolbar.reloadData()
        self.leftToolbar.reloadData()
        self.rightToolbar.reloadData()
        
        self.updateRightToolBarInfo()
    }
    
    
    func configPDFContendView() {
        
        let pdfDocument = CPDFDocument()
        pdfDocument?.insertBlankPage(pageSize: NSSize(width: 250, height: 200), at: 0)
        
        self.pdfView = CPDFListView(frame: self.pdfContendView.bounds)
        self.pdfView.autoresizingMask = [.width, .height]
        self.pdfView.document = pdfDocument
        self.pdfView.delegate = self
        self.pdfView.pdfListViewDelegate = self
        self.pdfView.autoScales = false
        self.pdfView.scaleFactor = 1
        self.pdfView.isCustomStampType = "1"
        
        self.pdfContendView.wantsLayer = true
        self.pdfContendView.layer?.cornerRadius = 4
        self.pdfContendView.layer?.masksToBounds = true
        self.pdfContendView.layer?.borderWidth = 1
        self.pdfContendView.addSubview(self.pdfView)
  
        
        NotificationCenter.default.addObserver(self, selector: #selector(CPDFListViewActiveAnnotationsChangeNotification), name: NSNotification.Name.init(rawValue: "CPDFListViewActiveAnnotationsChangeNotification"), object: nil)
    }
    
    func configTopToolbar() {
        self.topToolbar = CustomStampTopToolbar.createFromNib()
        self.topToolbar.frame = self.topContendView.bounds
        self.topToolbar.autoresizingMask = [.width, .height]
        self.topToolbar.pdfView = self.pdfView
        
        self.topContendView.addSubview(self.topToolbar)
        
    }
    
    func configLeftToolbar() {
        self.leftToolbar = CustomStampLeftToolbar.createFromNib()
        self.leftToolbar.frame = self.leftContendView.bounds
        self.leftToolbar.autoresizingMask = [.width, .height]
        self.leftToolbar.clickHandle = {[weak self] view , toolbarType, string in
            
            self?.pdfView.customStampAnnotationType = String(toolbarType.rawValue)
            
            if toolbarType == .move {
                self?.pdfView.annotationType = .unkown
            }else if toolbarType == .text ||
                toolbarType == .dateText ||
                toolbarType == .idText {
                self?.pdfView.toolMode = .noteToolMode
                self?.pdfView.annotationType = .freeText
                if string.isEmpty == false {
                    self?.pdfView.customStampTextValue = string
                }
            } else if toolbarType == .image {
                self?.pdfView.toolMode = .noteToolMode
                self?.pdfView.annotationType = .stamp
                self?.chooseImage()
            } else if toolbarType == .stamp {
                self?.pdfView.toolMode = .noteToolMode
                self?.chooseStamp()
            }
             
            
        }
        
        self.leftContendView.addSubview(self.leftToolbar)
        
    }
    
    func configRightToolbar() {
        self.rightToolbar = CustomStampRightToolbar.createFromNib()
        self.rightToolbar.frame = self.rightContendView.bounds
        self.rightToolbar.autoresizingMask = [.width, .height]
        self.rightToolbar.pdfView = self.pdfView
        self.rightToolbar.delegate = self
        
        self.rightContendView.addSubview(self.rightToolbar)
    }
    
    func updateViewColor() {
        
        if KMAppearance.isDarkMode() {
            self.window?.backgroundColor = NSColor(red: 38/255, green: 40/255, blue: 43/255, alpha: 1)
            self.pdfContendView.layer?.borderColor = NSColor.white.withAlphaComponent(0.05).cgColor
            self.pdfView.backgroundColor = NSColor(red: 47/255, green: 49/255, blue: 51/255, alpha: 1)
            
        } else {
            self.window?.backgroundColor = NSColor.white
            self.pdfContendView.layer?.borderColor = NSColor.black.withAlphaComponent(0.06).cgColor
            self.pdfView.backgroundColor = NSColor(red: 245/255, green: 245/255, blue: 245/255, alpha: 1)
            
        }
    }
    
    private func addEventMonitor() {
        if (self.eventMonitor != nil) {
            self.removeEventMonitor()
        }
        
        DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 0.3) {
            KMPrint("已添加事件监听")
            self.eventMonitor = NSEvent.addLocalMonitorForEvents(matching: [.scrollWheel, .leftMouseDown]) { [weak self] event in
                if (event.type == .scrollWheel && event.modifierFlags.contains(.option)) { // Alt + 鼠标滚轮
                    self?.pdfView.magnifyWheel(event)
                    return nil
                }
                return event
            }
        }
    }
    
    private func removeEventMonitor() {
        if (self.eventMonitor != nil) {
            KMPrint("已移除事件监听")
            
            NSEvent.removeMonitor(self.eventMonitor as Any)
            self.eventMonitor = nil
        }
    }
    
    func clear() {
        self.removeEventMonitor()
        CustomStampWindowController.currentWindowController = nil
        NotificationCenter.default.removeObserver(self)
    }
    
    //MARK: Private Method
    func chooseImage() {
        let accessoryCtr = KMImageAccessoryController()
        let openPanel = NSOpenPanel()
        openPanel.allowedFileTypes = KMImageAccessoryController.supportedImageTypes()
        openPanel.allowsMultipleSelection = false
        openPanel.accessoryView = accessoryCtr.view
        openPanel.canSelectHiddenExtension = true
        openPanel.beginSheetModal(for: self.window!) { [weak self] (result) in
            if result == .OK {
                guard let url = openPanel.url else {
                    return
                }
                let filePath = url.path
                if filePath.pathExtension.lowercased() == "pdf" {
                    if let pdf = PDFDocument(url: url), pdf.isEncrypted {
                        NSSound.beep()
                        return
                    }
                }
                
                let stamp = CStampObject(imageStampFilePath: filePath)
                stamp.nameString = ""
                self?.pdfView.setAddStamp(stamp, keepToolModel: true)
                self?.updateRightToolBarInfo()
            } else {
                self?.leftToolbar.toolbarType = .move
                self?.leftToolbar.reloadData()
            }
        }
    }
    
    func chooseStamp() {
        self.stampListWC = CSStampListWindowController.currentWC()
        self.stampListWC.clickHandle = {[weak self] view , actionType, filePath in
            if actionType == 0 {
                self?.leftToolbar.toolbarType = .move
                self?.leftToolbar.reloadData()
            } else if actionType == 1 {
                
                self?.pdfView.annotationType = .stamp
                let stamp = CStampObject(imageStampFilePath: filePath!)
                stamp.nameString = ""
                self?.pdfView.setAddStamp(stamp, keepToolModel: true)
                
                self?.updateRightToolBarInfo()
                
            }
            self?.window?.endSheet(view.window!)
        }
        
        self.window!.beginSheet(self.stampListWC.window!, completionHandler: {[weak self] response in
            self?.stampListWC.reloadData()
        })
         
    }
    
    func updateRightToolBarInfo() {
        if self.pdfView?.activeAnnotations.count == 0 {
            self.rightToolbar.currentAnnotation = nil
        } else {
            self.rightToolbar.currentAnnotation = self.pdfView.activeAnnotation
        }
        
        let page = self.pdfView?.document?.page(at: 0)
        if page?.annotations.isEmpty == false {
            self.addStampButton.isEnabled = true
            self.addStampButton.bezelColor = NSColor.controlAccentColor
        } else {
            self.addStampButton.isEnabled = false
            self.addStampButton.bezelColor = self.cancelButton.bezelColor
        }
        
    }
    
    @objc func cropCurrentPage() {
        var rect = NSIntegralRect(self.pdfView.currentSelectionRect())
        var page: CPDFPage?
        if let data = self.pdfView.currentSelectionPage() {
            page = data
        } else {
            page = self.pdfView.currentPage()
        }

        if (NSIsEmptyRect(rect)) {
            rect = KMCropTools.getPageForegroundBox(page!)
        }
        
        let index: UInt = (page?.pageIndex()) ?? 0
        self._cropPage(at: index, in: rect)

    }
    
    @objc private func _cropPage(at index: UInt, in rect: NSRect) {
        let oldRect = self.pdfView?.document?.page(at: index)?.bounds(for: .cropBox) ?? .zero
        let undoManager = self.pdfView.undoManager
        (undoManager?.prepare(withInvocationTarget: self) as? AnyObject)?._cropPage(at: index, in: oldRect)
        
        let page = self.pdfView.document.page(at: index)
        let newRect = NSIntersectionRect(rect, (page?.bounds(for: .mediaBox)) ?? .zero)
        page?.setBounds(newRect, for: .cropBox)
        
        /// 刷新预览视图
        self.pdfView.layoutDocumentView()
        self.pdfView.displayBox = .cropBox
    }
    
    //MARK: IBAction
    @IBAction func cancelAction(_ sender: Any) {
        guard let callBack = self.clickHandle else {
            return
        }
        callBack(self, 0, nil)
    }
    
    @IBAction func addStampAction(_ sender: Any) {
        guard let page = self.pdfView.document.page(at: 0) else {
            return
        }
        for anno in page.annotations ?? [] {
            self.pdfView.setNeedsDisplay(anno)
        }
        
        self.cropCurrentPage()
        
        let image = page.thumbnail(of: CGSizeMake(page.size.width*4, page.size.height*4))

        guard let callBack = self.clickHandle else {
            return
        }
        callBack(self, 1, image)
    }
    
    //MARK: CPDFListViewDelegate & Notification
    
    func pdfViewScaleDidChanged(_ pdfView: CPDFView!) {
        
        self.topToolbar?.pdfViewScaleChanged()
        
    }
    
    @objc func CPDFListViewActiveAnnotationsChangeNotification(notification: NSNotification) {
        if notification.object is CPDFListView {
            let listView : CPDFListView = notification.object as! CPDFListView
            if listView.isEqual(self.pdfView) {
                self.updateRightToolBarInfo()
            }
        }
    }
    
    func pdfListViewAddAnnotations(_ pdfListView: CPDFListView!, forAdd annotations: [CPDFAnnotation]!, in pdfPage: CPDFPage!) {
        if self.leftToolbar.toolbarType != .move {
            self.leftToolbar.toolbarType = .move
            self.leftToolbar.reloadData()
        }
        
    }
    
    override func showWindow(_ sender: Any?) {
        super.showWindow(sender)
     
    }
    
    override func close() {
        super.close()
        
        self.removeEventMonitor()
        CustomStampWindowController.currentWindowController = nil
        NotificationCenter.default.removeObserver(self)
        
    }
    
    func windowShouldClose(_ sender: NSWindow) -> Bool {
        
        self.removeEventMonitor()
        CustomStampWindowController.currentWindowController = nil
        NotificationCenter.default.removeObserver(self)
        
        return true
    }
}


extension CustomStampWindowController: CSRightToolbarDelegate {
    func csRightToolbar(_ toolbar: CustomStampRightToolbar, didAnnotationUpdate annotation: CPDFAnnotation?) {
        
    }
    
    func csRightToolbar(_ toolbar: CustomStampRightToolbar, didDeleteAnnotation annotation: CPDFAnnotation?) {
        self.pdfView.remove(annotation)
        self.reloadData()
    }
    
    func csRightToolbar(_ toolbar: CustomStampRightToolbar, didAnnotationClear annotation: CPDFAnnotation?) {
        let page = self.pdfView?.document?.page(at: 0)
        page?.removeAllAnnotations()
        self.pdfView?.setNeedsDisplayForVisiblePages()
        
        self.reloadData()
    }
    
    func csRightToolbar(didPDFClip toolbar: CustomStampRightToolbar) {
        guard let page = self.pdfView.document.page(at: 0) else {
            return
        }
        for anno in page.annotations ?? [] {
            if anno is CPDFFreeTextAnnotation {
                let newAnnotation = (anno as! CPDFFreeTextAnnotation)
                if self.pdfView.isEdit(withCurrentFreeText: newAnnotation) {
                    self.pdfView.commitEditAnnotationFreeText(newAnnotation)
                    self.pdfView.annotationType = .unkown
                }
            }
            self.pdfView.setNeedsDisplay(anno)
        }
        
        self.cropCurrentPage()
        
    }
    
    
}