//
//  KMRedactTopToolBar.swift
//  PDF Reader Pro
//
//  Created by tangchao on 2023/1/16.
//

import Cocoa
typealias KMRedactTopToolBarItemViewItemClick = (_ index: Int) -> ()
private class KMRedactTopToolBarItemView: NSView {
    var imageView = NSImageView()
    var titleLabel = NSTextField(labelWithString: "")
    var bottomLine = NSView()
    var button = NSButton()
    
    var itemID: Int = 0
    
    private var myIsSelected: Bool = false
    var isSelected: Bool {
        get {
            return myIsSelected
        }
        set {
            myIsSelected = newValue
            
            if (myIsSelected) {
                self.bottomLine.isHidden = false
            } else {
                self.bottomLine.isHidden = true
            }
        }
    }
    
    var itemClick: KMRedactTopToolBarItemViewItemClick!
    
    override init(frame frameRect: NSRect) {
        super.init(frame: frameRect)
        
        initSubViews()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        
        initSubViews()
    }
    
    func initSubViews() {
        self.addSubview(self.imageView)
        self.addSubview(self.titleLabel)
        self.addSubview(self.bottomLine)
        
        self.bottomLine.wantsLayer = true
        self.bottomLine.layer?.backgroundColor = NSColor.black.cgColor
        
        self.addSubview(self.button)
        self.button.isBordered = false
        self.button.title = ""
        self.button.target = self
        self.button.action = #selector(buttonAction)
    }
    
    override func layout() {
        super.layout()
        
        let width: CGFloat = NSWidth(self.bounds)
        let heigth: CGFloat = NSHeight(self.bounds)
        
        let imageSize: NSSize = NSSize(width: 14, height: 15)
        let imageY: CGFloat = (heigth-imageSize.height)*0.5
        self.imageView.frame = NSMakeRect(0, imageY, imageSize.width, imageSize.height)
        
        let titleH: CGFloat = 20
        let titleY: CGFloat = (heigth-titleH)*0.5
        let titleX: CGFloat = self.imageView.frame.maxX+8
        self.titleLabel.frame = NSMakeRect(titleX, titleY, width-titleX, titleH)
        
        self.bottomLine.frame = NSMakeRect(0, 0, width, 1)
        
        self.button.frame = self.bounds
    }
    
    @objc func buttonAction() {
        guard let callback = self.itemClick else {
            return
        }
        
        callback(self.itemID)
    }
}

typealias KMRedactTopToolBarItemClick = (_ index: Int) -> ()
class KMRedactTopToolBar: NSView {
    private var textAndImageItemView = KMRedactTopToolBarItemView()
    private var pageItemView = KMRedactTopToolBarItemView()
    
    private var applyButton = NSButton()
    private var clearButton = NSButton()
    private var closeButton = NSButton()
    
    var itemClick: KMRedactTopToolBarItemClick!
    
    override init(frame frameRect: NSRect) {
        super.init(frame: frameRect)
        
        initSubViews()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        
        initSubViews()
    }
    
    public func initSubViews() {
        self.addSubview(self.textAndImageItemView)
        self.addSubview(self.pageItemView)
        self.addSubview(self.applyButton)
        self.addSubview(self.clearButton)
        self.addSubview(self.closeButton)
        
        self.textAndImageItemView.titleLabel.stringValue = NSLocalizedString("Redact Text & Image", comment: "")
        self.textAndImageItemView.itemClick = { [weak self] index in
            self!.selectItem(0)
            
            guard let callback = self!.itemClick else {
                return
            }
            
            callback(4)
        }
        self.pageItemView.titleLabel.stringValue = NSLocalizedString("Redact Page", comment: "")
        self.pageItemView.itemClick = { [weak self] index in
            self!.selectItem(1)
            
            guard let callback = self!.itemClick else {
                return
            }
            
            callback(5)
        }
        
        self.applyButton.isBordered = false
        self.applyButton.title = NSLocalizedString("Redact", comment: "")
        self.applyButton.wantsLayer = true
        self.applyButton.layer?.backgroundColor = NSColor.black.cgColor
        self.applyButton.attributedTitle = NSAttributedString(string: self.applyButton.title, attributes: [NSAttributedString.Key.foregroundColor : NSColor.white])
        self.applyButton.layer?.cornerRadius = 4
        self.applyButton.target = self
        self.applyButton.action = #selector(applyButtonAction)
        
        self.clearButton.isBordered = false
        self.clearButton.title = NSLocalizedString("Erase", comment: "")
        self.clearButton.wantsLayer = true
        self.clearButton.layer?.backgroundColor = NSColor.black.cgColor
        self.clearButton.attributedTitle = NSAttributedString(string: self.clearButton.title, attributes: [NSAttributedString.Key.foregroundColor : NSColor.white])
        self.clearButton.layer?.cornerRadius = 4
        self.clearButton.target = self
        self.clearButton.action = #selector(clearButtonAction)
        
        self.closeButton.isBordered = false
        self.closeButton.title = NSLocalizedString("Exit", comment: "") 
        self.closeButton.wantsLayer = true
        self.closeButton.layer?.cornerRadius = 4
        self.closeButton.layer?.borderWidth = 1
        self.closeButton.layer?.borderColor = NSColor.black.cgColor
        self.closeButton.target = self
        self.closeButton.action = #selector(closeButtonAction)
    }
    
    override func layout() {
        super.layout()
        
        let width: CGFloat = NSWidth(self.bounds)
        let height: CGFloat = NSHeight(self.bounds)
        
        let itemX: CGFloat = (width-280)*0.5
        self.textAndImageItemView.frame = NSMakeRect(itemX, 0, 140, height)
        self.pageItemView.frame = NSMakeRect(self.textAndImageItemView.frame.maxX, 0, 140, height)
        
        let buttonH: CGFloat = 24
        let buttonY: CGFloat = (height-buttonH)*0.5
        
        let closeW: CGFloat = 44
        let closeX: CGFloat = width-12-closeW
        let closeY: CGFloat = (height-buttonH)*0.5
        self.closeButton.frame = NSMakeRect(closeX, closeY, closeW, buttonH)
        
        let clearW: CGFloat = 68
        let clearX: CGFloat = self.closeButton.frame.minX-8-clearW
        self.clearButton.frame = NSMakeRect(clearX, buttonY, clearW, buttonH)
        
        let applyW: CGFloat = 68
        let applyX: CGFloat = self.clearButton.frame.minX-8-applyW
        self.applyButton.frame = NSMakeRect(applyX, buttonY, applyW, buttonH)
    }
    
    @objc private func applyButtonAction() {
        guard let callback = self.itemClick else {
            return
        }
        
        callback(3)
    }
    
    @objc private func clearButtonAction() {
        guard let callback = self.itemClick else {
            return
        }
        
        callback(2)
    }
    
    @objc private func closeButtonAction() {
        guard let callback = self.itemClick else {
            return
        }
        
        callback(1)
    }
    
    public func selectItem(_ index: Int) {
        var count: Int = 0
        for item in [self.textAndImageItemView,
                     self.pageItemView] {
            if (index == count) {
                item.isSelected = true
            } else {
                item.isSelected = false
            }
            count += 1
        }
    }
    
}