class Spaceship {
  let name: String
  var health: Int
  var position: Int

  init(name: String, health : Int, position: Int) {
  self.name = name
  self.health = health
  self.position = position
  }

    func moveLeft() {
        position -= 1
    }

    func moveRight() {
        position += 1
    }


    func wasHit() {
        health -= 5
        if health <= 0 {
            print("Sorry, your ship was hit one too many times. Do you want to play again?")

        }
    }

}

class Fighter: Spaceship{
  let weapon: String
  var remainingFirePower: Int

  init(weapon: String, remainingFirePower: Int,name: String, health: Int, position: Int) {

    self.weapon = weapon
    self.remainingFirePower = remainingFirePower
    super.init(name: name, health: health, position: position)

  }

  func fire() {
    if remainingFirePower > 0 {
      remainingFirePower -= 1
    } else {
      print("You have no more power.")
    }
  }
}
xx
//let destroyer = Fighter()
//destroyer.weapon = "Laser"
//destroyer.remainingFirePower = 10
//print(destroyer.position)
//destroyer.moveRight()
//print(destroyer.position)

//let falcon = Spaceship()
//falcon.weapon = "Twin Gun"
//print(falcon.weapon)

//destroyer.fire()
//print(destroyer.remainingFirePower)
//destroyer.fire()
//print(destroyer.remainingFirePower)
//destroyer.fire()
//print(destroyer.remainingFirePower)

class ShieldedShip: Fighter {
  var shieldStrength: Int

  init(shieldStrength: Int, weapon: String, remainingFirePower: Int, name: String,health:Int,position:Int)

  {
    self.shieldStrength = shieldStrength
    super.init(weapon: weapon, remainingFirePower: remainingFirePower, name: name, health: health, position: position)
  }

  override func wasHit() {
    if shieldStrength > 0 {
      shieldStrength -= 5
    } else {
      super.wasHit()
    }
  }
}

//let defender = ShieldedShip()
//defender.name = "Defender"
//defender.weapon = "Cannon"
//defender.moveRight()
//print(defender.position)
//defender.fire()
//print(defender.remainingFirePower)

//defender.wasHit()
//print(defender.shieldStrength)
//print(defender.health)

let falcon = Spaceship(name: "Falcon", health:100, position:0)

let destroyer = Fighter(weapon: "Laser", remainingFirePower:10, name: "Destroyer", health:60, position:0)

let defender = ShieldedShip(shieldStrength: 20, weapon: "Cannon", remainingFirePower:8, name: "Defender",health:80, position:0)

let sameShip = falcon
print(falcon.position)
print(sameShip.position)
sameShip.moveLeft()
print(falcon.position)
print(sameShip.position)