//
//  BaseView.swift
//  PrivadoVPN
//
//  Created by Zhandos Bolatbekov on 04.06.2021.
//  Copyright © 2021 Privado LLC. All rights reserved.
//

import UIKit

class BaseView: UIView, ReactivelyConstrained {
    
    var portraitConstraints = [NSLayoutConstraint]()
    var landscapeConstraints = [NSLayoutConstraint]()
    var sharedConstraints = [NSLayoutConstraint]()
    
    let layoutEmitter = Emitter<EmitterLayoutChangeType>()
    
    init() {
        super.init(frame: .zero)
        
        self.layoutEmitter.addReaction { [weak self] isLandscape -> ShouldContinueReceiveNotifications in
            
            guard let self = self else { return false }
            
            if isLandscape {
                NSLayoutConstraint.deactivate(self.portraitConstraints)
                NSLayoutConstraint.activate(self.landscapeConstraints)
            } else {
                NSLayoutConstraint.deactivate(self.landscapeConstraints)
                NSLayoutConstraint.activate(self.portraitConstraints)
            }
            NSLayoutConstraint.activate(self.sharedConstraints)
            
            self.subviews.forEach { view in
                if let view = view as? BaseView {
                    view.layoutEmitter.invoke(isLandscape)
                }
            }
            
            self.layoutIfNeeded()
            
            return true
        }
    }
    
    @available(*, unavailable)
    required init?(coder: NSCoder) { nil }
}