enum App {

    static func main(context: AppContext) -> Bool {

        func addOKAction(alert: UIAlertController) {
            (title: "OK", style: .default, handler: nil)
                |> UIAlertAction.init
                |> alert.addAction
        }

        let showAlert = UIAlertController.init(title:message:preferredStyle:)
            >>> tee(addOKAction)
            >>> curry(reverse(context.viewController.present))(nil)(true)

        func success<A>(_: A) {
            (title: "Initialized", message: nil, preferredStyle: .alert)
                |> showAlert
        }

        func failure(error: Error) {
            (title: "Failed", message: error.localizedDescription, preferredStyle: .alert)
                |> showAlert
        }

        func done() { print("Initialization complete") }
        
        func returnTrue<A>(_: A) -> Bool { return true }

        return ()
            |> context.initialize
            |> Promise.main
            ?> success
            !> failure
            *> done
            |> returnTrue
    }

}