//
//  KMBox.swift
//  PDF Master
//
//  Created by wanjun on 2022/10/13.
//

import Cocoa

typealias mouseMoveCallback = (_ mouseEntered: Bool, _ mouseBox: KMBox) -> Void
typealias mouseDownCallback = (_ downEntered: Bool, _ mouseBox: KMBox, _ event: NSEvent) -> Void
typealias doubleClickCallback = (_ downEntered: Bool, _ mouseBox: KMBox) -> Void
typealias mouseRightDownCallback = (_ downEntered: Bool, _ mouseBox: KMBox, _ event: NSEvent) -> Void

@objcMembers class KMBox: NSBox {
    var moveCallback: mouseMoveCallback?
    var downCallback: mouseDownCallback?
    var doubleCallback: doubleClickCallback?
    var rightDownCallback: mouseRightDownCallback?
    var hoverColor : NSColor? // 悬浮颜色
    var clickColor : NSColor? // 点击颜色
    var defaultColor : NSColor? // 默认颜色
    var canHover : Bool! = true // 是否允许悬浮
    var canClick : Bool! = true // 是否允许点击
    var canRightClick : Bool! = true // 是否允许右击
    var canAutoHidden : Bool = false //是否需要自动隐藏
    var isDottedLine: Bool = false
    var lineDash: [CGFloat] = [3, 3, 3]
    var dottedLineRadius = 8.0
    var dottedLineWidth = 1.0
    var dottedLineColor: NSColor = NSColor(hex: "#68ACF8")
    
    var area: NSTrackingArea?
    
    deinit {
        if (self.area != nil) {
            self.removeTrackingArea(self.area!)
            self.area = nil
        }
    }
    
    override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)
        if isDottedLine {
            let path = NSBezierPath(roundedRect: self.bounds, xRadius: dottedLineRadius, yRadius: dottedLineRadius)
            path.setLineDash(lineDash, count: 3, phase: 0)
            path.lineWidth = dottedLineWidth
            dottedLineColor.setStroke()
            path.stroke()
        }
    }
    
    override func updateTrackingAreas() {
        super.updateTrackingAreas()

        if let _area = self.area, _area.rect.isEmpty == false {
            if (_area.rect.equalTo(self.bounds)) {
                return
            }
        }
        
        if (self.area != nil) {
            self.removeTrackingArea(self.area!)
            self.area = nil
        }
        
        self.area = NSTrackingArea(rect: self.bounds, options: [.mouseEnteredAndExited, .mouseMoved, .activeAlways], owner: self)
        self.addTrackingArea(self.area!)
//        self.addTrackingRect(self.bounds, owner: self, userData: nil, assumeInside: false)
    }
    
    override func mouseEntered(with event: NSEvent) {
        if canHover {
            if hoverColor != nil {
                fillColor = hoverColor!
            }
            
            if let callback = moveCallback {
                callback(true, self)
            }
        }
    }
    
    override func mouseExited(with event: NSEvent) {
        if canHover {
            if defaultColor != nil {
                fillColor = defaultColor!
            }
            
            if let callback = moveCallback {
                callback(false, self)
            }
        }
    }
    
    override func mouseDown(with event: NSEvent) {
        super.mouseDown(with: event)
        if canClick {
            if clickColor != nil {
                fillColor = clickColor!
            }
            
            if (event.clickCount == 1) {
                if let callback = downCallback {
                    callback(true, self, event)
                }
            } else if (event.clickCount > 1) {
                if let callback = doubleCallback {
                    callback(true, self)
                }
            }
        }
    }
    
    override func mouseUp(with event: NSEvent) {
        super.mouseUp(with: event)
        if canClick {
            if clickColor != nil {
                fillColor = defaultColor!
            }
            
            if let callback = downCallback {
                callback(false, self, event)
            }
        }
    }
    
    override func rightMouseDown(with event: NSEvent) {
        super.rightMouseDown(with: event)
        if canRightClick {
            if let callback = rightDownCallback {
                callback(true, self, event)
            }
        }
    }
}