import UIKit

extension UIColor {
    
    convenience init(hex: Int) {
        self.init(hex: hex, a: 1.0)
    }
    
    convenience init(hex: Int, a: CGFloat) {
        self.init(r: (hex >> 16) & 0xff, g: (hex >> 8) & 0xff, b: hex & 0xff, a: a)
    }
    
    convenience init(r: Int, g: Int, b: Int) {
        self.init(r: r, g: g, b: b, a: 1.0)
    }
    
    convenience init(r: Int, g: Int, b: Int, a: CGFloat) {
        self.init(red: CGFloat(r) / 255.0, green: CGFloat(g) / 255.0, blue: CGFloat(b) / 255.0, alpha: a)
    }
    
    convenience init?(hexString: String) {
        let hex = hexString.trimmingCharacters(in: CharacterSet.alphanumerics.inverted)
        var int = UInt64()
        Scanner(string: hex).scanHexInt64(&int)
        let a, r, g, b: UInt64
        switch hex.count {
        case 3: // RGB (12-bit)
            (a, r, g, b) = (255, (int >> 8) * 17, (int >> 4 & 0xF) * 17, (int & 0xF) * 17)
        case 6: // RGB (24-bit)
            (a, r, g, b) = (255, int >> 16, int >> 8 & 0xFF, int & 0xFF)
        case 8: // ARGB (32-bit)
            (a, r, g, b) = (int >> 24, int >> 16 & 0xFF, int >> 8 & 0xFF, int & 0xFF)
        default:
            (a, r, g, b) = (255, 0, 0, 0)
        }
        self.init(red: CGFloat(r) / 255, green: CGFloat(g) / 255, blue: CGFloat(b) / 255, alpha: CGFloat(a) / 255)
    }
    
    static func fromHex(_ hexString: String) -> UIColor {
        return UIColor(hexString: hexString) ?? .clear
    }
}

@IBDesignable
class InsetLabel: UILabel {
    @IBInspectable var verticalInset: CGFloat = 4
    @IBInspectable var horizontalInset: CGFloat = 7
    
    override func draw(_ rect: CGRect) {
        let insets = UIEdgeInsets(top: verticalInset, left: horizontalInset, bottom: verticalInset, right: horizontalInset)
        super.drawText(in: rect.inset(by: insets))
        self.layoutSubviews()
    }

    override var intrinsicContentSize: CGSize {
        var size = super.intrinsicContentSize
        size.width = horizontalInset * 2 + size.width
        size.height = verticalInset * 2 + size.height
        return size
    }
}
