MyEvent.swift

//
//  MyEvent.swift
//  CalendarApp
//
//  Created by RareScrap on 22.10.2020.
//  Copyright © 2020 Richard Topchii. All rights reserved.
//

import Foundation
import CalendarKit

class MyEvent: EventDescriptor {
    public var myVar = "asdasd"
    public var startDate = Date()
    public var endDate = Date()
    public var isAllDay = false
    public var text = ""
    public var attributedText: NSAttributedString?
    public var color = SystemColors.systemBlue {
      didSet {
        updateColors()
      }
    }
    public var backgroundColor = SystemColors.systemBlue.withAlphaComponent(0.3)
    public var textColor = SystemColors.label
    public var font = UIFont.boldSystemFont(ofSize: 12)
    public var userInfo: Any?
    public weak var editedEvent: EventDescriptor? {
      didSet {
        updateColors()
      }
    }

    public init() {}

    func makeEditable() -> Self {
      let cloned = MyEvent()
      cloned.startDate = startDate
      cloned.endDate = endDate
      cloned.isAllDay = isAllDay
      cloned.text = text
      cloned.attributedText = attributedText
      cloned.color = color
      cloned.backgroundColor = backgroundColor
      cloned.textColor = textColor
      cloned.userInfo = userInfo
      cloned.editedEvent = self
      return cloned as! Self
    }

    public func commitEditing() {
      guard let edited = editedEvent else {return}
      edited.startDate = startDate
      edited.endDate = endDate
    }

    private func updateColors() {
      (editedEvent != nil) ? applyEditingColors() : applyStandardColors()
    }

    private func applyStandardColors() {
      backgroundColor = color.withAlphaComponent(0.3)
      var h: CGFloat = 0, s: CGFloat = 0, b: CGFloat = 0, a: CGFloat = 0
      color.getHue(&h, saturation: &s, brightness: &b, alpha: &a)
      textColor = UIColor(hue: h, saturation: s, brightness: b * 0.4, alpha: a)
    }

    private func applyEditingColors() {
      backgroundColor = color
      textColor = .white
    }
    
}