//
//  PreferencesView.swift
//  PrivadoVPN
//
//  Created by Murad Shabanov on 08.02.2022.
//  Copyright © 2022 Privado LLC. All rights reserved.
//

final class PreferencesView: NSView {
    
    private enum Constants {
        
        enum Geometry {
            static let barEmptyHeight: CGFloat = 0
            static let barHeight: CGFloat = 36
        }
    }
    
    private var navigationBarHeightAnchor: NSLayoutConstraint?
    
    // MARK: - JSNavigationControllerViewDelegate
    
    let barView: NSView
    let contentView: NSView
    var leadingConstraint: NSLayoutConstraint?
    
    
    // MARK: - Initializers
    
    override init(frame frameRect: NSRect) {
        
        
        self.barView = NSView()
        self.contentView = NSView()
        
        super.init(frame: frameRect)
        
        self.createUI()
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    // MARK: - Private
    
    private func createUI() {
        
        self.translatesAutoresizingMaskIntoConstraints = false
        
        self.barView.translatesAutoresizingMaskIntoConstraints = false
        self.addSubview(self.barView)
        
        self.contentView.translatesAutoresizingMaskIntoConstraints = false
        self.addSubview(self.contentView)
        
        let heightLayout = self.barView.heightAnchor.constraint(equalToConstant: 0)
        self.navigationBarHeightAnchor = heightLayout
        
        NSLayoutConstraint.activate([
            heightLayout,
            self.barView.leadingAnchor.constraint(equalTo: self.leadingAnchor),
            self.barView.trailingAnchor.constraint(equalTo: self.trailingAnchor),
            self.barView.topAnchor.constraint(equalTo: self.topAnchor),
            //
            self.contentView.topAnchor.constraint(equalTo: self.barView.bottomAnchor),
            self.contentView.leadingAnchor.constraint(equalTo: self.leadingAnchor),
            self.contentView.trailingAnchor.constraint(equalTo: self.trailingAnchor),
            self.contentView.bottomAnchor.constraint(equalTo: self.bottomAnchor)
        ])
        
    }
    
}

// MARK: - JSNavigationControllerViewDelegate

extension PreferencesView: JSNavigationControllerViewDelegate {
    
    var navigationBarView: NSView? { self.barView }
    
    func hasNavigationBar(_ hasBar: Bool) {
        guard let heightLayout = self.navigationBarHeightAnchor else { return }
        heightLayout.constant = hasBar ? Constants.Geometry.barHeight : Constants.Geometry.barEmptyHeight
    }
}