//
//  NotificationsBellModuleView.swift
//  PrivadoVPN
//
//  Created by Zhandos Bolatbekov on 12.01.2021.
//  Copyright © 2021 Privado LLC. All rights reserved.
//

import Foundation
import UIKit

class NotificationsBellModuleView: UIButton, NotificationsBellViewInput {
    
    private enum Constants {
        static let bellImage = "notifications_button"
        
        enum Color {
            static let badgeBorderColor = UIColor(red: 25, green: 33, blue: 70)
            static let badgeFillColor = UIColor(red: 228, green: 59, blue: 105)
        }
        enum Geometry {
            static let imageSize = CGSize(width: 14, height: 18)
            static let badgeSize: CGFloat = 9.3
            static let badgeBorderWidth: CGFloat = 1.7
            static let badgeTop: CGFloat = 1
            static let badgeRight: CGFloat = 2
        }
    }
    
    var output: NotificationsBellModuleOutput
    private let badgeView: UIView = {
        let badge = UIView()
        badge.translatesAutoresizingMaskIntoConstraints = false
        badge.layer.cornerRadius = Constants.Geometry.badgeSize / 2
        badge.layer.borderWidth = Constants.Geometry.badgeBorderWidth
        badge.layer.backgroundColor = Constants.Color.badgeFillColor.cgColor
        badge.layer.borderColor = Constants.Color.badgeBorderColor.cgColor
        badge.clipsToBounds = true
        badge.isHidden = true
        return badge
    }()
    
    // MARK: - Init
    
    init(output: NotificationsBellModuleOutput) {
        self.output = output
        super.init(frame: .zero)
        
        let bellImage = UIImage(named: Constants.bellImage)
        let bellImageView = UIImageView(image: bellImage)
        bellImageView.translatesAutoresizingMaskIntoConstraints = false
        addSubview(bellImageView)
        NSLayoutConstraint.activate([
            bellImageView.heightAnchor.constraint(equalToConstant: Constants.Geometry.imageSize.height),
            bellImageView.widthAnchor.constraint(equalToConstant: Constants.Geometry.imageSize.width),
            bellImageView.centerXAnchor.constraint(equalTo: self.centerXAnchor),
            bellImageView.centerYAnchor.constraint(equalTo: self.centerYAnchor)
        ])
        
        addSubview(badgeView)
        NSLayoutConstraint.activate([
            badgeView.topAnchor.constraint(equalTo: bellImageView.topAnchor, constant: Constants.Geometry.badgeTop),
            badgeView.rightAnchor.constraint(equalTo: bellImageView.rightAnchor, constant: Constants.Geometry.badgeRight),
            badgeView.heightAnchor.constraint(equalToConstant: Constants.Geometry.badgeSize),
            badgeView.widthAnchor.constraint(equalToConstant: Constants.Geometry.badgeSize)
        ])
        
        addTarget(self, action: #selector(notificationsButtonClick), for: .touchUpInside)
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    // MARK: - Interface
    
    func showBadge(_ show: Bool) {
        badgeView.isHidden = !show
    }
    
    func set(highlighted: Bool) { }
    
    // MARK: - Methods
    
    @objc
    private func notificationsButtonClick() {
        output.openNotificationsList()
    }
}