// quick UIFontDescriptor test

class AvenirTestVC: UIViewController {
	
	override func viewDidLoad() {
		super.viewDidLoad()
		
		var avFamilyName: String = ""

		// let's make sure we have the Avenir Next font family
		for family in UIFont.familyNames {
			if family ==  "Avenir Next" {
				avFamilyName = family
				break
			}
		}
		
		if avFamilyName.isEmpty {
			fatalError("Avenir Next font family not found!!!")
		}
		
		let stackView = UIStackView()
		stackView.axis = .vertical
		stackView.spacing = 8
		
		stackView.translatesAutoresizingMaskIntoConstraints = false
		view.addSubview(stackView)
		
		let g = view.safeAreaLayoutGuide
		
		NSLayoutConstraint.activate([
			
			stackView.topAnchor.constraint(equalTo: g.topAnchor, constant: 40.0),
			stackView.leadingAnchor.constraint(equalTo: g.leadingAnchor, constant: 16.0),
			stackView.trailingAnchor.constraint(equalTo: g.trailingAnchor, constant: -16.0),
			
		])
		
		let weights: [UIFont.Weight] = [
			.light, .regular, .medium, .semibold, .bold, .heavy,
		]
		
		weights.forEach { w in
			let thisDescriptor = UIFontDescriptor(fontAttributes: [
				UIFontDescriptor.AttributeName.family: avFamilyName,
				UIFontDescriptor.AttributeName.traits: [
					UIFontDescriptor.TraitKey.weight: w
				]
			])
			let fnt: UIFont = UIFont(descriptor: thisDescriptor, size: 28)
			let label = UILabel()
			label.font = fnt
			label.text = fnt.fontName
			label.textAlignment = .center
			stackView.addArrangedSubview(label)
		}
		
	}
	
}