Pattern Matching Simplify

  abstract class Dickmacher
  case class Beverage (name: String, cal: Int) extends Dickmacher
  case class Food (name: String, cal: Int) extends Dickmacher
  case class Meal (name: String, food: Food, drink: Beverage) extends Dickmacher
  case class Combo (starter: Dickmacher, main: Dickmacher) extends Dickmacher

  def simplify(d: Dickmacher) : Dickmacher = {
    d match {
      case Combo(Food(x,cal1), Food(y,cal2)) => simplify(Food(x + " mit " + y, cal1 + cal2))
      case Combo(Beverage(x,cal1), Beverage(y,cal2)) => simplify(Beverage(x + " mit " + y, cal1 + cal2))
      case Combo(a, b) => Combo(simplify(a), simplify(b))
      case _ => d 
    }
  }
  
  val coke = Beverage("Cola Light", 50)
  val burger = Food("Big Mac", 400)
  
  
  val cokeLight = Beverage("Cola", 100)
  val wannaBeBurger = Food("Veggie Mac", 50)
  

  val cokeCombo = Combo(coke, cokeLight)
  println(simplify(cokeCombo))
  
  
  val burgerCombo = Combo(burger, wannaBeBurger)
  println(simplify(burgerCombo))
  
  
  
  val monsterCombo = Combo(burgerCombo, cokeCombo);
  println(simplify(monsterCombo))