//
//  KMReadModelView.swift
//  PDF Reader Pro
//
//  Created by lizhe on 2023/3/23.
//

import Cocoa

enum KMReadModelViewScaleType: String, CaseIterable {
    case fitWidth = "Fit"
    case actualSize = "Actual Size"
    case autoSize = "Auto"
    case _10 = "10%"
    case _25 = "25%"
    case _50 = "50%"
    case _100 = "100%"
    case _150 = "150%"
    case _200 = "200%"
    case _400 = "400%"
    case _800 = "800%"
    
    static func allValues() -> [String] {
        var array: [String] = []
        for key in KMReadModelViewScaleType.allCases {
            array.append(NSLocalizedString(key.rawValue, comment: ""))
        }
        return array
    }
    
    static func typeOfRawValue(value: String) -> KMReadModelViewScaleType {
        var type: KMReadModelViewScaleType
        switch value {
        case NSLocalizedString(KMReadModelViewScaleType.fitWidth.rawValue, comment: ""): type = .fitWidth
        case NSLocalizedString(KMReadModelViewScaleType.actualSize.rawValue, comment: ""): type = .actualSize
        case NSLocalizedString(KMReadModelViewScaleType.autoSize.rawValue, comment: ""): type = .autoSize
        case KMReadModelViewScaleType._10.rawValue: type = ._10
        case KMReadModelViewScaleType._25.rawValue: type = ._25
        case KMReadModelViewScaleType._50.rawValue: type = ._50
        case KMReadModelViewScaleType._100.rawValue: type = ._100
        case KMReadModelViewScaleType._150.rawValue: type = ._150
        case KMReadModelViewScaleType._200.rawValue: type = ._200
        case KMReadModelViewScaleType._400.rawValue: type = ._400
        case KMReadModelViewScaleType._800.rawValue: type = ._800
        default:
            type = .autoSize
        }
        return type
    }
}


protocol KMReadModelViewDelegate: NSObject {
    func firstPageButtonDidChange(view: KMReadModelView, sender: Any)
    func beforePageButtonDidChange(view: KMReadModelView, sender: Any)
    func afterPageButtonDidChange(view: KMReadModelView, sender: Any)
    func lastPageButtonDidChange(view: KMReadModelView, sender: Any)
    func currentPageButtonDidChange(view: KMReadModelView, sender: Any, pageIndex: Int)
    func scaleDidChange(view: KMReadModelView, sender: Any, type: KMReadModelViewScaleType)
    func cancelReadModel(view: KMReadModelView, sender: Any)
    
    func readModelViewWidthChange(view: KMReadModelView, width: CGFloat)
}

class KMReadModelView: KMBaseXibView {

    @IBOutlet weak var firstPageView: NSView!
    @IBOutlet weak var beforePageView: NSView!
    @IBOutlet weak var currentPageView: NSView!
    @IBOutlet weak var totalPageView: NSTextField!
    @IBOutlet weak var afterPageView: NSView!
    @IBOutlet weak var lastPageView: NSView!
    @IBOutlet weak var totalLable: NSTextField!
    @IBOutlet weak var zoomView: NSView!
    @IBOutlet weak var backgroundContentView: NSView!
    @IBOutlet weak var currentPageTextField: NSTextField!
    @IBOutlet weak var currentPageBackgroundView: NSView!
    @IBOutlet weak var contentBox: KMBox!
    
    @IBOutlet weak var contentViewWidthConstraint: NSLayoutConstraint!
    @IBOutlet weak var currentContentViewWidthConstraint: NSLayoutConstraint!
    @IBOutlet weak var totalPageCountWidthConstraint: NSLayoutConstraint!
    @IBOutlet weak var scaleWidthConstraint: NSLayoutConstraint!
    
    var firstPageButton: KMDesignButton!
    var beforePageButton: KMDesignButton!
    var afterPageButton: KMDesignButton!
    var lastPageButton: KMDesignButton!
    var zoomButton: KMDesignSelect!
    
    var timer: Timer?
    weak var delegate: KMReadModelViewDelegate?
    
    var currentPageIndex: Int? {
        didSet {
            self.currentPageTextField.stringValue = (currentPageIndex! + 1).description
            self.updateButtonState()
            self.updateUI()
        }
    }
    
    var totalPagesCount: Int? {
        didSet {
            self.totalLable.stringValue = totalPagesCount?.description ?? "1"
            self.updateButtonState()
            self.updateUI()
        }
    }
    
    
    var scaleType: KMReadModelViewScaleType? {
        didSet {
            self.zoomButton.selectItem(at: KMReadModelViewScaleType.allValues().firstIndex(of: scaleType!.rawValue)!)
        }
    }
    
    deinit {
        self.endTimer()
    }
    
    override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)

        // Drawing code here.

    }

    override func setup() {
        self.backgroundColor(NSColor.km_init(hex: "#FFFFFF"))
        self.shadow = NSShadow()
        self.wantsLayer = true
        self.layer?.shadowColor = NSColor.km_init(hex: "#000000", alpha: 0.16).cgColor
        self.layer?.shadowOffset = CGSize(width: 0, height: -2)
        self.layer?.shadowRadius = 8
        self.layer?.shadowOpacity = 1
        self.layer?.cornerRadius = 4
        
        firstPageButton = KMDesignButton(withType: .Image)
        self.firstPageView.addSubview(firstPageButton.view)
        firstPageButton.view.frame = CGRect(x: 0, y: 0, width: 24, height: 24)
        firstPageButton.target = self
        firstPageButton.image = NSImage(named: "icon_btn_readModel_first")!
        firstPageButton.image_disabled = NSImage(named: "icon_btn_readModel_first_dis")!
        firstPageButton.action = #selector(firstPageButtonAction)
        firstPageButton.pagination()
        firstPageButton.borderWidth = 1
        firstPageButton.borderColor = NSColor.km_init(hex: "#DFE1E5")
        firstPageButton.updateUI()
        
        beforePageButton = KMDesignButton(withType: .Image)
        self.beforePageView.addSubview(beforePageButton.view)
        beforePageButton.view.frame = CGRect(x: 0, y: 0, width: 24, height: 24)
        beforePageButton.target = self
        beforePageButton.image = NSImage(named: "icon_btn_readModel_before")!
        beforePageButton.image_disabled = NSImage(named: "icon_btn_readModel_before_dis")!
        beforePageButton.action = #selector(beforePageButtonAction)
        beforePageButton.pagination()
        beforePageButton.borderWidth = 1
        beforePageButton.borderColor = NSColor.km_init(hex: "#DFE1E5")
        beforePageButton.updateUI()
        
        afterPageButton = KMDesignButton(withType: .Image)
        self.afterPageView.addSubview(afterPageButton.view)
        afterPageButton.view.frame = CGRect(x: 0, y: 0, width: 24, height: 24)
        afterPageButton.target = self
        afterPageButton.image = NSImage(named: "icon_btn_readModel_after")!
        afterPageButton.image_disabled = NSImage(named: "icon_btn_readModel_after_dis")!
        afterPageButton.action = #selector(afterPageButtonAction)
        afterPageButton.pagination()
        afterPageButton.borderWidth = 1
        afterPageButton.borderColor = NSColor.km_init(hex: "#DFE1E5")
        afterPageButton.updateUI()
        
        lastPageButton = KMDesignButton(withType: .Image)
        self.lastPageView.addSubview(lastPageButton.view)
        lastPageButton.view.frame = CGRect(x: 0, y: 0, width: 24, height: 24)
        lastPageButton.target = self
        lastPageButton.image = NSImage(named: "icon_btn_readModel_last")!
        lastPageButton.image_disabled = NSImage(named: "icon_btn_readModel_last_dis")!
        lastPageButton.action = #selector(lastPageButtonAction)
        lastPageButton.pagination()
        lastPageButton.borderWidth = 1
        lastPageButton.borderColor = NSColor.km_init(hex: "#DFE1E5")
        lastPageButton.updateUI()
        
        zoomButton = KMDesignSelect(withType: .PopButton)
        self.zoomView.addSubview(zoomButton.view)
        zoomButton.view.frame = CGRect(x: 0, y: 0, width: 65, height: 24)
        zoomButton.selectItem(at: 0)
        zoomButton.delete = self
        zoomButton.font = NSFont.SFProTextRegularFont(12.0)
        zoomButton.font_hov = NSFont.SFProTextRegularFont(12.0)
        zoomButton.font_focus = NSFont.SFProTextRegularFont(12.0)
        zoomButton.font_disabled = NSFont.SFProTextRegularFont(12.0)
        zoomButton.borderWidth = 0
        zoomButton.updateUI()
        
        currentPageBackgroundView.border(NSColor.km_init(hex: "#DFE1E5"), 1, 4)
        currentPageTextField.textColor = NSColor.km_init(hex: "#252629")
        currentPageTextField.font = NSFont.SFProTextRegularFont(12.0)
        currentPageTextField.delegate = self
        
        totalLable.textColor = NSColor.km_init(hex: "#252629")
        totalLable.font = NSFont.SFProTextRegularFont(12.0)
        
        
        contentBox.moveCallback = { [unowned self] (enter, box) in
            if enter {
                self.inReadModelView()
            } else {
                self.beginTimer()
            }
        }
    }
    
    //刷新界面UI 和 数据
    override func reloadData() {
        
    }
    
    override func updateLanguage() {
        zoomButton.removeAllItems()
        zoomButton.addItems(withObjectValues: KMReadModelViewScaleType.allValues())
    }
    
    override func updateUI() {
        let width = self.fetchWidth()
//        if self.contentViewWidthConstraint.constant != width {
            self.delegate?.readModelViewWidthChange(view: self, width: width)
//        }
        self.contentViewWidthConstraint.constant = width
        self.currentContentViewWidthConstraint.constant = self.fetchCurrentPageIndexWidth(string: self.currentPageTextField.stringValue as NSString)
        self.totalPageCountWidthConstraint.constant = self.fetchTotalPageIndexWidth(string: self.totalPageView.stringValue as NSString)
        self.scaleWidthConstraint.constant = self.fetchScaleWidth(string: self.zoomButton.stringValue as NSString)
        zoomButton.view.frame = self.zoomView.bounds
    }
    
    override func resetData() {
        
    }
    
    override func addNotification() {
        
    }
    
    override func removeNotification() {
        
    }
}

//MARK: data
extension KMReadModelView {
    func fetchWidth() -> CGFloat {
        var width = 16.0
        width += self.firstPageView.frame.size.width
        width += 8.0
        width += self.beforePageView.frame.size.width
        width += 8.0
        width += self.fetchCurrentPageIndexWidth(string: self.currentPageTextField.stringValue as NSString)
        width += 8.0
        width += 4.0
        width += 8.0
        width += self.fetchTotalPageIndexWidth(string: self.totalLable.stringValue as NSString)
        width += 8.0
        width += self.afterPageView.frame.size.width
        width += 8.0
        width += self.lastPageView.frame.size.width
        width += 16.0
        width += self.fetchScaleWidth(string: self.zoomButton.stringValue as NSString)
        width += 16.0
        return width
    }
    
    func fetchCurrentPageIndexWidth(string: NSString) -> CGFloat {
        var width = 28.0
        let attributes = [NSAttributedString.Key.font : NSFont.SFProTextRegularFont(12.0)]
        width += string.boundingRect(with: CGSize(width: 100, height: 24), attributes: attributes).size.width
        width = max(width, 48)
        return width
    }
    
    func fetchTotalPageIndexWidth(string: NSString) -> CGFloat {
        var width = 0.0
        let attributes = [NSAttributedString.Key.font : NSFont.SFProTextRegularFont(12.0)]
        width += string.boundingRect(with: CGSize(width: 100, height: 24), attributes: attributes).size.width
        width = max(width, 30)
        return width
    }
    
    func fetchScaleWidth(string: NSString) -> CGFloat {
        var width = 40.0
        let attributes = [NSAttributedString.Key.font : NSFont.SFProTextRegularFont(12.0)]
        width += string.boundingRect(with: CGSize(width: 100, height: 24), attributes: attributes).size.width
        width = max(width, 80)
        return width
    }
}
//MARK: Mouse
extension KMReadModelView {
    override func mouseDown(with event: NSEvent) {
        KMPrint("mouseDown")
    }
    
    override func mouseUp(with event: NSEvent) {
        KMPrint("mouseUp")
    }
    
    override func mouseMoved(with event: NSEvent) {
        KMPrint("mouseMoved")
    }
    
    override func mouseEntered(with event: NSEvent) {
        KMPrint("mouseEntered")
    }

    override func mouseExited(with event: NSEvent) {
        KMPrint("mouseExited")
    }
}

//MARK: PopButton
extension KMReadModelView: KMSelectPopButtonDelegate {
    func km_comboBoxSelectionDidChange(_ obj: KMDesignSelect) {
        KMPrint("km_comboBoxSelectionDidChange")
        self.updateUI()
        self.delegate?.scaleDidChange(view: self, sender: obj, type: KMReadModelViewScaleType(rawValue: KMReadModelViewScaleType.allValues()[obj.indexOfSelectedItem]) ?? .autoSize)
    }
}

//MARK:
extension KMReadModelView: NSTextFieldDelegate {
    func controlTextDidEndEditing(_ obj: Notification) {
        let string = Int(self.currentPageTextField.stringValue)?.description ?? "1"
        currentPageTextField.stringValue = string
        self.delegate?.currentPageButtonDidChange(view: self, sender: obj, pageIndex: Int(string) ?? 1)
    }
}

//MARK: In out
extension KMReadModelView {
    @objc fileprivate func inReadModelView() {
        self.endTimer()
        self.updateUI()
        NSAnimationContext.runAnimationGroup { NSAnimationContext in
            self.animator().alphaValue = 1
        }
    }
    
    @objc fileprivate func outReadModelView() {
        NSAnimationContext.runAnimationGroup { NSAnimationContext in
            self.animator().alphaValue = 0
            self.endTimer()
        }
    }
    
    func resetTimer() {
        self.endTimer()
        self.beginTimer()
    }
    
    func beginTimer() {
        if self.timer != nil {
            self.endTimer()
        }
        self.inReadModelView()
        self.timer = Timer.scheduledTimer(timeInterval: 3.0, target: self, selector: #selector(outReadModelView), userInfo: nil, repeats: true)
    }
    
    func endTimer() {
        self.timer?.invalidate()
        self.timer = nil
    }
}

//MARK: Action
extension KMReadModelView {
    @IBAction func escButtonAction(_ sender: Any) {
        KMPrint("read model escButtonAction")
        self.delegate?.cancelReadModel(view: self, sender: sender)
    }
    
    @objc func firstPageButtonAction(sender: Any) {
        KMPrint("firstPageButtonAction")
        if self.canFirstPageButtonAction() {
            self.delegate?.firstPageButtonDidChange(view: self, sender: sender)
        }
        self.updateButtonState()
    }
    
    @objc func beforePageButtonAction(sender: Any) {
        KMPrint("beforePageButtonAction")
        if self.canBeforePageButtonAction() {
            self.delegate?.beforePageButtonDidChange(view: self, sender: sender)
        }
        self.updateButtonState()
    }
    
    @objc func afterPageButtonAction(sender: Any) {
        KMPrint("afterPageButtonAction")
        if self.canAfterPageButtonAction() {
            self.delegate?.afterPageButtonDidChange(view: self, sender: sender)
        }
        self.updateButtonState()
    }
    
    @objc func lastPageButtonAction(sender: Any) {
        KMPrint("lastPageButtonAction")
        if self.canLastPageButtonAction() {
            self.delegate?.lastPageButtonDidChange(view: self, sender: sender)
        }
        self.updateButtonState()
    }
    
    func canFirstPageButtonAction() -> Bool {
        guard let pageIndex = self.currentPageIndex else { return false }
        
        if pageIndex != 0 {
            return true
        } else {
            return false
        }
    }
    
    func canBeforePageButtonAction() -> Bool {
        guard let pageIndex = self.currentPageIndex else { return false }
        
        if pageIndex != 0 {
            return true
        } else {
            return false
        }
    }
    
    func canAfterPageButtonAction() -> Bool {
        guard let totalCount = self.totalPagesCount else { return false }
        guard let pageIndex = self.currentPageIndex else { return false }
        
        if pageIndex < totalCount - 1 {
            return true
        } else {
            return false
        }
    }
    
    func canLastPageButtonAction() -> Bool {
        guard let totalCount = self.totalPagesCount else { return false }
        guard let pageIndex = self.currentPageIndex else { return false }
        
        if pageIndex != totalCount - 1 {
            return true
        } else {
            return false
        }
    }
    
    func updateButtonState() {
        self.firstPageButton.enabled = self.canFirstPageButtonAction()
        self.beforePageButton.enabled = self.canBeforePageButtonAction()
        self.afterPageButton.enabled = self.canAfterPageButtonAction()
        self.lastPageButton.enabled = self.canLastPageButtonAction()
    }
}