Fashion is your helper to share and reuse UI styles in a Swifty way.

enum Style: String, StringConvertible {
  case customButton

  var string: String {
    return rawValue
  }
}

final class MainStylesheet: Stylesheet {
  func define() {
    share { (label: UILabel) in
      label.textColor = .blue
      label.numberOfLines = 2
      label.adjustsFontSizeToFitWidth = true
    }

    // register("custom-button") { (button: UIButton) in
    register(Style.customButton) { (button: UIButton) in
      button.backgroundColor = .red
      button.setTitleColor(.white, for: .normal)
    }
  }
}

Fashion.register([MainStylesheet()])

let button = UIButton() // let button = UIButton(styles: "custom-button")
button.apply(styles: Style.customButton) // backgroundColor => .red

let label = UILabel()
addSubview(label) // textColor => .blue

// Registers stylization closure with the specified name.
register("card-view") { (view: UIView) in
  view.backgroundColor = .white
  view.layer.masksToBounds = false
  view.layer.shadowColor = UIColor.black.cgColor
  view.layer.shadowOffset = CGSize(width: 0, height: 0.5)
  view.layer.shadowOpacity = 0.2
  view.layer.cornerRadius = 8
}

// Unregisters stylization closure with the specified name.
unregister("card-view")

// All views will have red background color.
share { (view: UIView) in
  view.backgroundColor = .red
}

// All table views will have white background color, it overrides the red
// background registered above.
share { (tableView: UITableView) in
  tableView.backgroundColor = .white
  tableView.tableFooterView = UIView(frame: CGRect.zero)
  tableView.separatorStyle = .none
  tableView.separatorInset = .zero
}

// Unregisters shared stylization closure for the specified type.
unshare(UITableView.self)

shareAppearance { (barButtonItem: UIBarButtonItem) in
  barButtonItem.setTitleTextAttributes([
    NSFontAttributeName : UIFont(name: "HelveticaNeue-Light", size: 12)!,
    NSForegroundColorAttributeName : UIColor.red],
    for: .normal)
}

let stylist = Stylist()

stylist.register("card-view") { (view: UIView) in
  view.backgroundColor = .white
  view.layer.cornerRadius = 8
}

stylist.unregister("card-view")

stylist.share { (tableView: UITableView) in
  tableView.backgroundColor = .white
  tableView.tableFooterView = UIView(frame: .zero)
}

stylist.unshare(UITableView.self)

let label = UILabel()
let style = Style<UILabel> { label in
  label.backgroundColor = UIColor.black
  label.textColor = UIColor.white
  label.numberOfLines = 10
}

// The same as style.apply(to: label)
label.apply(style: style)

let label = UILabel()
let style1 = Style<UILabel> { label in
  label.backgroundColor = UIColor.black
}
let style2 = Style<UILabel>{ label in
  label.textColor = UIColor.white
}

let composedStyle = Style.compose(style1, style2)

// The same as composedStyle.apply(to: label)
label.apply(style: composedStyle)

// A single style
let button = UIButton(styles: "custom-button")

// Multiple styles should be separated by a space
let label = UILabel(styles: "content-view cool-label")

// The initialized also accepts StringConvertible, so something other
// than magic String could also be used

enum Style: String, StringConvertible {
  case customButton
  case contentView
  case coolLabel

  var string: String {
    return rawValue
  }
}

// A single style
let button = UIButton(styles: Style.customButton)

// Multiple styles
let label = UILabel(styles: [Style.contentView, Style.coolLabel])

let label = UILabel()

// StringConvertible
label.apply(styles: Style.contentView, Style.coolLabel)

// String
label.apply(styles: "content-view", "cool-label")

// Style structs
let style = Style<UILabel> { label in
  label.backgroundColor = UIColor.black
}
label.apply(style: style)

let button = UIButton()

// A single style
button.styles = "custom-button"

// Multiple styles
button.styles = "content-view custom-button"