struct SubscriptionButtonViewModel {
    let pediodText: String
    let priceText: String
    let backgroundColor: UIColor
    let textColor: UIColor
    let borderColor: UIColor?
}

class SubscriptionButtonView: UIButton {

    private enum Constants {
        static let basicFont: UIFont = UIFont.fontRobotoBoldOf(size: 20)
        static let cornerRadius: CGFloat = 4.0
        static let defaultBordedWidth: CGFloat = 1.5
    }

    enum ViewConstants {
        static let defaultButtonHeight: CGFloat = 60.0
    }

    private weak var pediodLabel: UILabel!
    private weak var priceLabel: UILabel!

    class func create(with model: SubscriptionButtonViewModel) -> SubscriptionButtonView {

        let view = SubscriptionButtonView()
        view.configure(with: model)

        return view
    }
}

private extension SubscriptionButtonView {

    func createPeriodLabel(with model: SubscriptionButtonViewModel) -> UILabel {
        let label = UILabel()
        label.textColor = model.textColor
        label.font = Constants.basicFont
        label.text = model.pediodText
        label.textAlignment = .left

        label.translatesAutoresizingMaskIntoConstraints = false
        addSubview(label)
        label.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 20).isActive = true
        label.centerYAnchor.constraint(equalTo: centerYAnchor).isActive = true

        return label
    }

    func createPriceLabel(with model: SubscriptionButtonViewModel) -> UILabel {
        let label = UILabel()
        label.textColor = model.textColor
        label.font = Constants.basicFont
        label.text = model.priceText
        label.textAlignment = .right

        label.translatesAutoresizingMaskIntoConstraints = false
        addSubview(label)
        label.trailingAnchor.constraint(equalTo: trailingAnchor, constant: -20).isActive = true
        label.centerYAnchor.constraint(equalTo: centerYAnchor).isActive = true

        return label
    }

    func createViews(with model: SubscriptionButtonViewModel) {
        pediodLabel = createPeriodLabel(with: model)
        priceLabel = createPriceLabel(with: model)
        backgroundColor = model.backgroundColor
        layer.cornerRadius = Constants.cornerRadius
        clipsToBounds = true
        if let borderColor = model.borderColor {
            layer.borderColor = borderColor.cgColor
            layer.borderWidth = Constants.defaultBordedWidth
        }
        translatesAutoresizingMaskIntoConstraints = false
    }

    func configure(with model: SubscriptionButtonViewModel) {
        createViews(with: model)
    }
}