//
//  SegmentCell.swift.swift
//  PrivadoVPN
//
//  Created by Murad Shabanov on 03.02.2022.
//  Copyright © 2022 Privado LLC. All rights reserved.
//

import Foundation
import AppKit

final class SegmentCell: View {
    
    // swiftlint:disable nesting
    private enum Constants {
        
        enum Color {
            static let title = NSColor.white
            static let date = NSColor.white
            static let line = NSColor(red: 21, green: 25, blue: 53)
        }
        
        enum Font {
            enum Name {
                static let title = PrivadoConstants.Font.semiBold
                static let date = PrivadoConstants.Font.semiBold
            }
            
            enum Size {
                static let title: CGFloat = 13.5
                static let date: CGFloat = 12
            }
        }
        
        enum Geometry {
            static let titleTop: CGFloat = 15
            static let titleBottom: CGFloat = 15
            static let titleLeading: CGFloat = 20
            static let lineHeight: CGFloat = 1
        }
        
    }
    
    // swiftlint:enable nesting
    
    private let titleField = NSTextField(frame: .zero)
    private let line = View()
    private var isSelected: Bool?
    
    // MARK: - Interface
    
    func update(with title: String) {
        self.titleField.stringValue = title
    }
    
    func cellIsSelected(_ selected: Bool) {
        self.isSelected = selected
        self.titleField.textColor = selected ? .white : NSColor(red: 124, green: 134, blue: 186)
    }
    
    // MARK: - Lifecycle View
    
    override func addSubviews() {
        
        self.addSubview(self.titleField)
        self.addSubview(self.line)
        self.viewBackgroundColor = .clear
        self.isHoverEnabled = true
        // titleField
        self.titleField.translatesAutoresizingMaskIntoConstraints = false
        self.titleField.setContentCompressionResistancePriority(.defaultHigh, for: .horizontal)
        self.titleField.isEditable = false
        self.titleField.isSelectable = false
        self.titleField.usesSingleLineMode = true
        self.titleField.isBezeled = false
        self.titleField.drawsBackground = false
        self.titleField.focusRingType = .none
        self.titleField.alignment = .left
        
        self.titleField.textColor = Constants.Color.title
        self.titleField.textColor = NSColor(red: 124, green: 134, blue: 186)
        self.titleField.font = NSFont(name: Constants.Font.Name.title, size: Constants.Font.Size.title)
        
        // line
        self.line.translatesAutoresizingMaskIntoConstraints = false
        self.line.viewBackgroundColor = Constants.Color.line
        
    }
    
    override func addConstraints() {
        NSLayoutConstraint.activate([
            //
            self.titleField.topAnchor.constraint(equalTo: self.topAnchor, constant: Constants.Geometry.titleTop),
            self.titleField.leadingAnchor.constraint(equalTo: self.leadingAnchor, constant: Constants.Geometry.titleLeading),
            self.titleField.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -5),
            self.titleField.bottomAnchor.constraint(equalTo: self.line.topAnchor, constant: -Constants.Geometry.titleBottom),
            //
            self.line.leadingAnchor.constraint(equalTo: self.leadingAnchor, constant: Constants.Geometry.titleLeading),
            self.line.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -Constants.Geometry.titleLeading),
            self.line.heightAnchor.constraint(equalToConstant: Constants.Geometry.lineHeight),
            self.line.bottomAnchor.constraint(equalTo: self.bottomAnchor)
        ])
    }
    
    override func updateTrackingAreas() {
        super.updateTrackingAreas()

        for trackingArea in self.trackingAreas {
            self.removeTrackingArea(trackingArea)
        }
        
        let options: NSTrackingArea.Options = [.mouseEnteredAndExited, .activeAlways]
        let trackingArea = NSTrackingArea(rect: NSRect(x: 0, y: 0, width: 160, height: 55), options: options, owner: self, userInfo: nil)
        self.addTrackingArea(trackingArea)
    }
    
    override func onMouseHover(_ hover: Bool) {
        guard let isSelected = self.isSelected, !isSelected else { return }
        self.titleField.textColor = hover ? .white : NSColor(red: 124, green: 134, blue: 186)
    }
}