//
//  KMToolbarItemView.swift
//  PDF Master
//
//  Created by tangchao on 2023/10/24.
//

import Cocoa

class KMToolbarClickButton: NSButton {
    weak var clickObject: AnyObject?
}

extension NSControl.ImagePosition {
    static let imageExpandLeft: NSControl.ImagePosition = .init(rawValue: 100)!
}

private let KMPopOverClosedByWindowNotificationName = "KMPopOverClosedByWindowNotification"
extension KMToolbarItemView {
    public static let popOverClosedNotificationName = Notification.Name(KMPopOverClosedByWindowNotificationName)
}

@objcMembers class KMToolbarItemView: NSView {
    
    var menuFormRepresentation: NSMenuItem?
    
    private var _itemIdentifier: String?
    var itemIdentifier: String? {
        get {
            return self._itemIdentifier
        }
    }
    
    lazy var clickButton: KMToolbarClickButton = {
        let _clickButton = KMToolbarClickButton()
        _clickButton.bezelStyle = .regularSquare
        _clickButton.isBordered = false
        _clickButton.imagePosition = .imageOnly
        _clickButton.clickObject = self
        return _clickButton
    }()
    
    var isSelected = false {
        didSet {
            if self.itemIdentifier != KMToolbarDividerItemIdentifier {
                if (isSelected) {
                    if (isMainTool) {
//                        self.layer?.backgroundColor = self.normalBackgroundColor.cgColor
                        self.imageViewBox.fillColor = self.normalBackgroundColor
                        self.nameBtn.setTitleColor(color: KMAppearance.titleColor(), font: .SFProTextSemiboldFont(14))
                        self.linView.isHidden = false
                        return
                    }
//                    self.layer?.backgroundColor = self.selectedBackgroundColor.cgColor
                    self.imageViewBox.fillColor = self.selectedBackgroundColor
                    if(self.image != nil && self.alternateImage != nil) {
                        if (self.selectedImage != nil) {
                            self.imageViewBtn.image = self.selectedImage!
                        } else {
                            self.imageViewBtn.image = self.alternateImage!
                        }
                    }
                    if (self.nameBtn.superview != nil) {
                        self.nameBtn.setTitleColor(color: KMAppearance.titleColor())
                    }
                    if(self.needExpandAction) {
                        self.needExpandButton.image = NSImage(named: "KMImageNameUXIconBtnTriDownSel")
                    }
                } else {
                    if (isMainTool) {
//                        self.layer?.backgroundColor = self.normalBackgroundColor.cgColor
                        self.imageViewBox.fillColor = self.normalBackgroundColor
                        self.nameBtn.setTitleColor(color: NSColor(red: 97.0/255.0, green: 100.0/255.0, blue: 105.0/255.0, alpha: 1.0),font: .SFProTextRegularFont(14))
                        self.linView.isHidden = true
                        return
                    }
//                    self.layer?.backgroundColor = self.normalBackgroundColor.cgColor
                    self.imageViewBox.fillColor = self.normalBackgroundColor
                    if (self.needExpandAction) {
                        self.needExpandButton.image = NSImage(named: "KMImageNameUXIconBtnTriDownNor")
                    }
                    if (self.image != nil) {
                        self.imageViewBtn.image = self.image!
                    }
                    if (self.nameBtn.superview != nil) {
                        self.nameBtn.setTitleColor(color: KMAppearance.titleColor())
                    }
                }
            }
        }
    }
    var unEnabled = false {
        didSet {
            self.clickButton.isEnabled = !self.unEnabled
            self.nameBtn.isEnabled = !self.unEnabled
            self.imageViewBtn.isEnabled = !self.unEnabled
            self.needExpandButton.isEnabled = !self.unEnabled
        }
    }
    var isShowCustomToolTip = false {
        didSet {
            if (self.isShowCustomToolTip) {
                self.clickButton.toolTip = ""
            }
        }
    }
    var boxImagePosition: NSControl.ImagePosition = .imageLeft {
        didSet {
            self._layoutView()
        }
    }
    
    var image: NSImage? {
        didSet {
            self.imageViewBtn.image = self.image
        }
    }
    var selectedImage: NSImage?
    var alternateImage: NSImage?
    
    var titleName: String? {
        didSet {
            self.nameBtn.title = self.titleName ?? " "
            self.nameBtn.setTitleColor(color: KMAppearance.titleColor())
        }
    }
    
    weak var target: AnyObject? {
        didSet {
            self.clickButton.target = self.target
        }
    }
    var btnAction: Selector? {
        didSet {
            self.clickButton.action = self.btnAction
        }
    }
    
    var needExpandAction = false
    var btnTag = 0 {
        didSet {
            self.clickButton.tag = self.btnTag
        }
    }
    
    var customizeView: NSView? {
        didSet {
            self._layoutView()
        }
    }
    var isMainTool = false {
        didSet {
            if (isMainTool) {
                self.nameBtn.setTitleColor(color: NSColor(red: 97.0/255.0, green: 100.0/255.0, blue: 105.0/255.0, alpha: 1), font: .SFProTextRegularFont(14))
            } else {
                self.nameBtn.setTitleColor(color: KMAppearance.titleColor())
            }
            self._layoutView()
        }
    }
    
    var linView: NSView = {
        let _linView = NSView()
        _linView.wantsLayer = true
        _linView.layer?.backgroundColor = NSColor(red: 23/255.0, green: 112/255.0, blue: 244/255.0, alpha: 1).cgColor
        _linView.layer?.cornerRadius = 2
        return _linView
    }()
  
    var normalBackgroundColor: NSColor = .clear
    var selectedBackgroundColor: NSColor = KMAppearance.Status.selColor()
    
    var imageViewBox: NSBox = {
        let _imageViewBox = NSBox()
        _imageViewBox.borderWidth = 0
        _imageViewBox.contentViewMargins = NSZeroSize
        _imageViewBox.boxType = .custom
        return _imageViewBox
    }()
    private lazy var imageViewBtn: NSButton = {
        let _imageViewBtn = NSButton()
        _imageViewBtn.bezelStyle = .regularSquare
        _imageViewBtn.isBordered = false
        _imageViewBtn.imagePosition = .imageOnly
        return _imageViewBtn
    }()
    private var nameBtn: NSButton = {
        let _nameBtn = NSButton()
        _nameBtn.bezelStyle = .regularSquare
        _nameBtn.isBordered = false
        _nameBtn.imagePosition = .imageOnly
        _nameBtn.font = .systemFont(ofSize: 12)
        _nameBtn.title = ""
        return _nameBtn
    }()
    private var needExpandButton: NSButton = {
        let _needExpandButton = NSButton()
        _needExpandButton.bezelStyle = .regularSquare
        _needExpandButton.isBordered = false
        _needExpandButton.imagePosition = .imageOnly
        _needExpandButton.image = NSImage(named: "KMImageNameUXIconBtnTriDownNor")
        return _needExpandButton
    }()
    private var _popOver: NSPopover?
    var popOver: NSPopover? {
        get {
            return self._popOver
        }
        set {
            if self._popOver?.isEqual(to: newValue) == false {
                self._popOver = newValue
                if (newValue != nil) {
                    self.layer?.backgroundColor = self.selectedBackgroundColor.cgColor
                } else {
                    if (self.isSelected) {
                        self.layer?.backgroundColor = self.selectedBackgroundColor.cgColor
                    }else {
                        self.layer?.backgroundColor = self.normalBackgroundColor.cgColor
                    }
                }
            }
        }
    }
    
    private var _menuViewController: KMCustomButtonPopMenuViewController?
    private var _kNormalImage: NSImage?
    private var _originalHelpTip: String?
    
    deinit {
        Swift.debugPrint("KMToolbarItemView deinit")
        NotificationCenter.default.removeObserver(self)
    }
    
    convenience init(itemIdentifier: String) {
        self.init()
        
        self._itemIdentifier = itemIdentifier
        self.boxImagePosition = .imageLeft
        self.wantsLayer = true
        self.layer?.cornerRadius = 5
        self.layer?.masksToBounds = true
        
//        self.normalBackgroundColor = .clear
//        self.selectedBackgroundColor = NSColor(red: 223.0/255.0, green: 225.0/255.0, blue: 229.0/255.0, alpha: 1)
        
        self._addTrackingArea()
        NotificationCenter.default.addObserver(self, selector: #selector(_windowClosedPop), name: KMToolbarItemView.popOverClosedNotificationName, object: nil)
    }
    
    convenience init(itemIdentifier: String, postition imagePositionImagePosition: NSControl.ImagePosition, withPopMenu popMenuViewController: KMCustomButtonPopMenuViewController?) {
        self.init()
        
        self.boxImagePosition = imagePositionImagePosition
        self._menuViewController = popMenuViewController
        self._itemIdentifier = itemIdentifier
        self.wantsLayer = true
        self.layer?.cornerRadius = 4
        self.layer?.masksToBounds = true
        
//        self.normalBackgroundColor = .clear
//        self.selectedBackgroundColor = NSColor(red: 223.0/255.0, green: 225.0/255.0, blue: 229.0/255.0, alpha: 1)
        
        self._addTrackingArea()
        self._layoutView()
        if (popMenuViewController != nil) {
            NotificationCenter.default.addObserver(self, selector: #selector(_windowClosedPop), name: KMToolbarItemView.popOverClosedNotificationName, object: nil)
        }
    }
    
    override func draw(_ dirtyRect: NSRect) {
        if (self.itemIdentifier == KMToolbarDividerItemIdentifier) {
            let context = NSGraphicsContext.current?.cgContext
            KMContextSaveGState(context)
            KMContextTranslateCTM(context, CGRectGetWidth(dirtyRect)/2.0, CGRectGetHeight(dirtyRect)/2.0-10)
            KMContextMoveToPoint(context, 0, 0)
            KMContextAddLineToPoint(context, 0, 20)
            KMContextSetStrokeColorWithColor(context, NSColor(red: 0, green: 0, blue: 0, alpha: 0.1).cgColor)
            KMContextStrokePath(context)
            KMContextRestoreGState(context)
        }
    }
    
    override var toolTip: String? {
        get {
            return self._originalHelpTip
        }
        set {
            self.clickButton.toolTip = newValue ?? ""
            self._originalHelpTip = self.clickButton.toolTip
            if(self.isShowCustomToolTip) {
                self.clickButton.toolTip = ""
            }
        }
    }
    
    // MARK: - Private Methods
    
    private func _addTrackingArea() {
        let trackingArea = NSTrackingArea(rect: self.bounds, options: [.mouseEnteredAndExited, .inVisibleRect, .activeInKeyWindow], owner: self)
        self.addTrackingArea(trackingArea)
    }
    
    override func mouseEntered(with event: NSEvent) {
        super.mouseEntered(with: event)
        
        guard let _window = self.window else {
            return
        }
        
        if (!_window.isKeyWindow) {
            return
        }
        if (self.itemIdentifier == KMToolbarDividerItemIdentifier || self.customizeView != nil || self.image == nil) {
            return
        }
        if (!self.isSelected) {
//            self.layer?.backgroundColor = self.selectedBackgroundColor.cgColor
            self.imageViewBox.fillColor = self.selectedBackgroundColor
            if(self.image != nil && self.alternateImage != nil) {
                self._kNormalImage = self.image
                self.imageViewBtn.image = self.alternateImage
                if(self.nameBtn.superview != nil) {
                    self.nameBtn.setTitleColor(color: KMAppearance.titleColor())
                }
            }
        }
        if (self.needExpandAction) {
            self.needExpandButton.image = NSImage(named: "KMImageNameUXIconBtnTriDownSel")
//            [self showPop:self];
        }else if (self.isShowCustomToolTip) {
            self.perform(#selector(_showHUDHint), with: nil, afterDelay: 0.1)
        }
    }
    
    override func mouseExited(with event: NSEvent) {
        super.mouseExited(with: event)
        
        if (!self.isSelected && !self.needExpandAction) {
//            self.layer?.backgroundColor = self.normalBackgroundColor.cgColor
            self.imageViewBox.fillColor = self.normalBackgroundColor
            if(self.image != nil && self.alternateImage != nil) {
                self.imageViewBtn.image = self._kNormalImage ?? self.image!
            }
        }

        if(self.needExpandAction && !self.isSelected) {
            self.layer?.backgroundColor = self.normalBackgroundColor.cgColor
            if(self.image != nil && self.alternateImage != nil) {
                self.imageViewBtn.image = self._kNormalImage ?? self.image!
            }
            
            self.needExpandButton.image = NSImage(named: "KMImageNameUXIconBtnTriDownNor")
        }
        
        guard let _window = self.window else {
            return
        }
        if (!_window.isKeyWindow) {
            return
        }
        
        if(self.nameBtn.superview != nil && !self.isSelected && !self.isMainTool) {
            self.nameBtn.setTitleColor(color: KMAppearance.titleColor())
        }
        
        if (self.isShowCustomToolTip && !self.needExpandAction) {
            NSObject.cancelPreviousPerformRequests(withTarget: self, selector: #selector(_showHUDHint), object: nil)
            self._closePop()
        }
    }
    
    @objc private func _showHUDHint() {
        //    KMToolbarItemPopViewController *popViewController = [[[KMToolbarItemPopViewController alloc] init] autorelease];
        //    self.popOver = [[[NSPopover alloc] init] autorelease];
        //    self.popOver.contentViewController = popViewController;
        //    self.popOver.animates = NO;
        //    self.popOver.behavior = NSPopoverBehaviorSemitransient;
        //    self.popOver.backgroundColor = [KMAppearance KMBluegrey01Color];
        //
        //    self.popOver.contentSize = popViewController.view.frame.size;
        //    [popViewController updateWithHelpTip:self.originalHelpTip];
        //    [self.popOver showRelativeToRect:self.bounds ofView:self preferredEdge:NSRectEdgeMinY];
    }
    
    @objc private func _windowClosedPop(sender: Notification) {
        if let data = self._popOver?.isEqual(to: sender.object), data {
            self.popOver = nil
        }
    }
    
    private func _closePop() {
        self.popOver?.close()
        self.popOver = nil
    }
    
    private func _layoutView() {
        let offset = 4.0
        let offsetY = 2.0
        let offsetX = 4.0
        if self.nameBtn.superview != nil {
            self.nameBtn.removeFromSuperview()
        }
        if self.linView.superview != nil {
            self.linView.removeFromSuperview()
        }
        
        if self.imageViewBox.superview != nil {
            self.imageViewBox.removeFromSuperview()
        }
        if self.imageViewBtn.superview != nil {
            self.imageViewBtn.removeFromSuperview()
        }
        
        if self.customizeView != nil {
            if self.customizeView?.superview != nil {
                self.customizeView?.removeFromSuperview()
            }
            self.addSubview(self.customizeView!)
            
            self.customizeView?.mas_makeConstraints({ make in
                make?.left.right().equalTo()(0)
                make?.centerY.equalTo()(0)
                make?.width.offset()(self.customizeView!.frame.size.width)
                make?.height.offset()(self.customizeView!.frame.size.height)
            })
            return
        }
        if self.boxImagePosition == .imageOnly && self.itemIdentifier != KMToolbarDividerItemIdentifier {
            self.addSubview(self.imageViewBox)
            self.imageViewBox.mas_makeConstraints { make in
                make?.left.right().top().bottom().equalTo()(0)
            }
            
            self.imageViewBox.contentView?.addSubview(self.imageViewBtn)
            self.imageViewBtn.mas_makeConstraints { make in
                make?.left.equalTo()(self.imageViewBox.mas_left)?.offset()(offsetX)
                make?.top.equalTo()(self.imageViewBox.mas_top)?.offset()(offsetY)
                make?.bottom.equalTo()(self.imageViewBox.mas_bottom)?.offset()(-offsetY)
                make?.right.equalTo()(self.imageViewBox.mas_right)?.offset()(-offsetX)
            }
        } else if (self.boxImagePosition == .imageLeft) {
            self.addSubview(self.imageViewBox)
            self.imageViewBox.mas_makeConstraints { make in
                make?.left.top().bottom().equalTo()(0)
            }
            
            self.imageViewBox.contentView?.addSubview(self.imageViewBtn)
            self.imageViewBtn.mas_makeConstraints { make in
                make?.left.equalTo()(self.imageViewBox.mas_left)?.offset()(2 * offsetX)
                make?.top.equalTo()(self.imageViewBox.mas_top)?.offset()(offsetY)
                make?.bottom.equalTo()(self.imageViewBox.mas_bottom)?.offset()(-offsetY)
                make?.right.equalTo()(0)
            }
            
            self.addSubview(self.nameBtn)
            self.nameBtn.mas_makeConstraints { make in
                make?.centerY.equalTo()(0)
                make?.left.equalTo()(self.imageViewBox.mas_right)?.offset()(0)
                if (self.needExpandAction) {
                    make?.right.equalTo()(self.mas_right)?.offset()(-2*offsetX-8)
                } else {
                    make?.right.equalTo()(self.mas_right)?.offset()(-2*offsetX)
                }
            }
            
            if(self.needExpandAction) {
                self.needExpandButton.image = NSImage(named: "KMImageNameUXIconBtnTriDownNor")
                self.addSubview(self.needExpandButton)
                self.needExpandButton.mas_makeConstraints { make in
                    make?.centerY.equalTo()(0)
                    make?.width.height().equalTo()(8)
                    make?.right.equalTo()(self.mas_right)?.offset()(-offset)
                }
            }
            
            self.layer?.cornerRadius = 6
        } else if (self.boxImagePosition == .imageExpandLeft) {
            self.addSubview(self.imageViewBox)
            self.imageViewBox.mas_makeConstraints { make in
                make?.left.top().bottom().equalTo()(0)
            }

            self.imageViewBox.contentView?.addSubview(self.imageViewBtn)
            self.imageViewBtn.mas_makeConstraints { make in
                make?.left.equalTo()(self.imageViewBox.mas_left)?.offset()(offsetX)
                make?.top.equalTo()(self.imageViewBox.mas_top)?.offset()(offsetY)
                make?.bottom.equalTo()(self.imageViewBox.mas_bottom)?.offset()(-offsetY)
                make?.right.equalTo()(0)
            }

            self.needExpandButton.image = NSImage(named: "KMImageNameUXIconBtnTriDownNor")
            self.addSubview(self.needExpandButton)
            self.needExpandButton.mas_makeConstraints { make in
                make?.centerY.equalTo()(0)
                make?.width.height().equalTo()(8)
                make?.right.equalTo()(self.mas_right)?.offset()(-offset)
            }

            self.addSubview(self.nameBtn)
            self.nameBtn.mas_makeConstraints { make in
                make?.centerY.equalTo()(0)
                make?.left.equalTo()(self.imageViewBox.mas_right)?.offset()(0)
                make?.right.equalTo()(self.needExpandButton.mas_left)?.offset()(0)
            }
        } else if (self.boxImagePosition == .imageAbove) {
            self.addSubview(self.nameBtn)
            self.nameBtn.alignment = .center
            self.nameBtn.mas_makeConstraints { make in
                make?.left.right().equalTo()(0)
                make?.width.greaterThanOrEqualTo()(32)
                make?.bottom.equalTo()(self.mas_bottom)?.offset()(0)
            }
            
            self.addSubview(self.imageViewBox)
            self.imageViewBox.mas_makeConstraints { make in
                make?.top.equalTo()(0)
                make?.width.equalTo()(32)
                make?.centerX.equalTo()(0)
                make?.bottom.equalTo()(nameBtn.mas_top)?.offset()(0)
            }
        
            self.imageViewBox.contentView?.addSubview(self.imageViewBtn)
            self.imageViewBtn.mas_makeConstraints { make in
                make?.left.equalTo()(offset)
                make?.right.equalTo()(-offset)
                make?.top.equalTo()(0)
                make?.bottom.equalTo()(0)
            }
        } else {
            if (self.itemIdentifier == KMToolbarDividerItemIdentifier) {
                self.addSubview(self.imageViewBox)
                self.imageViewBox.mas_makeConstraints { make in
                    make?.top.equalTo()(0)
                    make?.width.equalTo()(8)
                    make?.left.equalTo()(0)
                    make?.right.equalTo()(0)
                    make?.bottom.equalTo()(self.mas_bottom)?.offset()(0)
                }
            }

        }

        if self.nameBtn.superview != nil && self.isMainTool {
            self.addSubview(self.linView)
            self.linView.mas_makeConstraints { make in
                make?.width.offset()(32)
                make?.height.offset()(3)
                make?.centerX.equalTo()(self.mas_centerX)
                make?.bottom.equalTo()(self.mas_bottom)?.offset()(0)
            }
            
            self.nameBtn.font = .systemFont(ofSize: 14)
            self.linView.isHidden = true
        } else {
            self.nameBtn.font = .systemFont(ofSize: 12)
        }
        
        if self.itemIdentifier != KMToolbarDividerItemIdentifier {
            self.imageViewBox.borderColor = .clear
            self.imageViewBox.borderWidth = 1.0
            self.imageViewBox.cornerRadius = 7.0
            
            self.addSubview(self.clickButton)
            self.clickButton.mas_makeConstraints { make in
                make?.left.right().top().bottom().equalTo()(0)
            }
        }
    }
}