import UIKit

public class ShadowContainerView: UIView {
    public let contentView = UIView()

    public override var cornerRadius: CGFloat {
        didSet {
            contentView.cornerRadius = cornerRadius
        }
    }

    public override var frameWithoutTransform: CGRect {
        didSet {
            recalculateShadowPath()
        }
    }

    public override init(frame: CGRect) {
        super.init(frame: frame)
        addSubview(contentView)
        cornerCurve = .continuous
        contentView.cornerCurve = .continuous
        contentView.autoresizingMask = []
        contentView.autoresizesSubviews = false
        contentView.clipsToBounds = true
        shadowColor = UIColor(dark: .black, light: .black.withAlphaComponent(0.6))
        shadowRadius = 48
        shadowOpacity = 1.0
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    public override func layoutSubviews() {
        super.layoutSubviews()
        contentView.frame = bounds
    }

    func recalculateShadowPath() {
        shadowPath = UIBezierPath(roundedRect: bounds, cornerRadius: cornerRadius)
    }
}