//
//  CustomAlertView.swift
//  PDF Master
//
//  Created by wanjun on 2023/10/7.
//

import Cocoa

enum KMCustomAlertStyle: Int {
    case black
    case blue
}

class CustomAlertView: NSView {

    override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)

        // Drawing code here.
    }
    
    static func alertView(message: String, fromView supverView: NSView, withStyle alertStyle: KMCustomAlertStyle, backgroundColor color: NSColor?) -> CustomAlertView? {
        if alertStyle != .black && alertStyle != .blue {
            return nil
        }
        
        let view = CustomAlertView()
        let style = NSMutableParagraphStyle()
        style.lineBreakMode = .byWordWrapping
        
        var fontSize: CGFloat = 0
        var offsetSize = CGSize.zero
        if alertStyle == .black {
            fontSize = 16
        } else {
            fontSize = 12
        }
        
        let attributes: [NSAttributedString.Key: Any] = [
            .font: NSFont.systemFont(ofSize: fontSize),
            .paragraphStyle: style
        ]
        
        let maxSize = CGSize(width: min(supverView.frame.size.width - 80, 500), height: supverView.frame.size.height - 40)
        let size = message.boundingRect(with: maxSize, options: [.truncatesLastVisibleLine, .usesLineFragmentOrigin, .usesFontLeading], attributes: attributes).size
        
        let ceilSize = NSSize(width: ceil(size.width), height: ceil(size.height))
        
        if alertStyle == .black {
            offsetSize = NSSize(width: ceilSize.width + 60, height: ceilSize.height + 30)
            view.frame = NSRect(x: (supverView.frame.size.width - offsetSize.width) / 2,
                                y: (supverView.frame.size.height - offsetSize.height) / 2,
                                width: offsetSize.width, height: offsetSize.height)
        } else {
            offsetSize = NSSize(width: ceilSize.width + ceilSize.height + 14 + 10, height: ceilSize.height + 14)
            view.frame = NSRect(x: (supverView.frame.size.width - offsetSize.width) / 2,
                                y: (supverView.frame.size.height - offsetSize.height) - 10,
                                width: offsetSize.width, height: offsetSize.height)
        }
        
        supverView.addSubview(view)
        view.wantsLayer = true
        
        let messageLabel: NSTextField
        if alertStyle == .black {
            view.layer?.cornerRadius = 8
            if let color1 = color {
                view.layer?.backgroundColor = color1.cgColor
            } else {
                view.layer?.backgroundColor = NSColor.black.withAlphaComponent(0.7).cgColor
            }
            messageLabel = NSTextField(frame: NSRect(x: 15, y: 15, width: ceilSize.width + 30, height: ceilSize.height))
        } else {
            view.layer?.cornerRadius = view.frame.size.height / 2
            if let color1 = color {
                view.layer?.backgroundColor = color1.cgColor
            } else {
                view.layer?.backgroundColor = NSColor(red: 78/255.0, green: 163/255.0, blue: 255/255.0, alpha: 1).cgColor
            }
            messageLabel = NSTextField(frame: NSRect(x: view.frame.size.height / 2, y: 7, width: ceilSize.width + 10, height: ceilSize.height))
        }
        
        messageLabel.font = NSFont.systemFont(ofSize: fontSize)
        messageLabel.textColor = NSColor.white
        messageLabel.backgroundColor = NSColor.clear
        messageLabel.isBordered = false
        messageLabel.isEditable = false
        if #available(OSX 10.11, *) {
            messageLabel.lineBreakMode = .byWordWrapping
        }
        
        messageLabel.alignment = .center
        messageLabel.stringValue = message
        view.addSubview(messageLabel)
        view.alphaAnimation(from: 0, to: 1, duration: 0.3) {
            DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
                view.alphaAnimation(from: 1.0, to: 0.0, duration: 0.3) {
                    view.removeFromSuperview()
                }
            }
        }
        
        return view
    }

    
    static func alertView(message: String, fromView supverView: NSView, withStyle alertStyle: KMCustomAlertStyle) -> CustomAlertView? {
        return CustomAlertView.alertView(message: message, fromView: supverView, withStyle: alertStyle, backgroundColor: nil)
    }
        
    func alphaAnimation(from fromValue: Float, to toValue: Float, duration: Float, finishedBlock block: @escaping () -> Void) {
        let flash = CABasicAnimation(keyPath: "opacity")
        flash.fromValue = NSNumber(value: fromValue)
        flash.toValue = NSNumber(value: toValue)
        flash.duration = 0.5
        self.layer?.add(flash, forKey: "flashAnimation")
        
        DispatchQueue.main.asyncAfter(deadline: .now() + TimeInterval(duration)) {
            block()
        }
    }

}