GameOfThrones

trait Wealth {
  val money: Int
  val armyStrength: Int
}

trait GreatHouse {
  val name: String
  val wealth: Wealth
}

trait MakeWildFire {
  this: GreatHouse =>
  def makeWildFire: Wealth => Wealth = Wealth(this.wealth.money, this.wealth.armyStrength + 1000)
}

trait BorrowMoney {
  this: GreatHouse =>
  def borrowMoney: Wealth => Wealth = Wealth(this.wealth.money + 100, this.wealth.armyStrength)
}

trait CallDragon {
  this: GreatHouse =>
  def callDragon: Wealth => Wealth = Wealth(this.wealth.money, this.wealth.armyStrength * 2)
}

class GameOfThrones(house1: GreatHouse, house2: GreatHouse) {
  def nextTurn(strategy1: Wealth => Wealth)(strategy2: Wealth => Wealth): GameOfThrones = {
    val newWealth1 = strategy1(house1.wealth)
    val newWealth2 = strategy2(house2.wealth)
    new GameOfThrones(house1.copy(wealth = newWealth1), house2.copy(wealth = newWealth2))
  }
}
case class Targaryen(override val name: String, override val wealth: Wealth)
  extends GreatHouse with CallDragon {
  override def equals(that: Any): Boolean = that match {
    case Targaryen(n:String, w:Wealth) => this.name == n && this.wealth == w
    case _ => false
  }
}

case class Lannisters(override val name: String, override val wealth: Wealth)
  extends GreatHouse with BorrowMoney with MakeWildFire {
  override def equals(that: Any): Boolean = that match {
    case Lannisters(n: String, w: Wealth) => this.name == n && this.wealth == w
    case _ => false
  }
}

object solution {
  val targaryen: Targaryen = Targaryen("Targaryen", Wealth(1000, 200))
  val lannisters: Lannisters = Lannisters("Lannisters", Wealth(800, 300))
  private val gameOfThrones = new GameOfThrones(targaryen, lannisters);
  gameOfThrones.nextTurn(targaryen.callDragon)(lannisters.borrowMoney)
  gameOfThrones.nextTurn(targaryen.callDragon)(lannisters.makeWildFire)
}