You can't have an if inside a case

IfAndCase.scala

  object WagerGameAction extends GameAction {
    def execute(gameState: GameState): GameState = gameState match {
      case Wager(stake) => {
        println(wagers)
        print(increments25)
        print(increments25ForYou)
        val betVal = readLine()
        val realBet = confirm(scala.math.abs(betVal.toInt))
        if (!afford(realBet, stake)) {
          println("You don't have enough credits to back that bet. You have " + stake + " credits. ")
          Wager(stake)
        } else {
          val flip = r.nextInt(2)
          print(headsTails)
          println(freddyBet)
          val tails = readLine()
          val result = wager(realBet, call(tails), stake, flip)
          println(readOut(feedBack(result)))
          val (_, _, newTotal) = result
          print("Are you ready for another match of Outback CoinFlip? You can wager up to " + newTotal + " credits. ")
          val input = readLine()
          input.toLowerCase match {
            case "yes" => Wager(newTotal)
            case "no" => End
            case _ => StartAgain(newTotal)
          }
        }
      }
    }
  }