Step 5 - Car racing(Refactoring)

src/main/kotlin/carracing/CarRace.kt

@@ -1,7 +1,8 @@
 package carracing
 
 import carracing.RandomNumberGenerator.getRandom
-import carracing.view.ResultView
+
+typealias RaceHistory = List<List<Car>>
 
 class CarRace(val cars: List<Car>, val numRounds: Int) {
 
@@ -10,15 +11,16 @@ class CarRace(val cars: List<Car>, val numRounds: Int) {
         require(numRounds > MIN_NUMBER_OF_ROUNDS) { "Select at least one round to start the race" }
     }
 
-    fun startRace() {
+    private val raceHistory = mutableListOf<List<Car>>()
+    fun startRace(): RaceHistory {
         repeat(numRounds) {
             cars.forEach { it.move(random = getRandom()) }
-            ResultView.showStatus(cars)
+            raceHistory.add(cars.map { Car(it.name, it.position) })
         }
-        ResultView.displayWinners(winners = getWinners())
+        return raceHistory
     }
 
-     fun getWinners(): List<Car> {
+    fun getWinners(): List<Car> {
         val maxPosition = cars.maxOf { it.position }
         return cars.filter { it.position == maxPosition }
     }

src/main/kotlin/carracing/Main.kt

@@ -2,6 +2,7 @@ package carracing
 
 import carracing.view.InputView.getCarNames
 import carracing.view.InputView.getRoundInput
+import carracing.view.ResultView
 
 fun main() {
     val carsInput =
@@ -10,6 +11,7 @@ fun main() {
 
     val cars = CarGenerator.generateCars(carsInput)
     val race = CarRace(cars = cars, numRounds = numRounds)
-
-    race.startRace()
+    val raceHistory: RaceHistory = race.startRace()
+    raceHistory.forEach { _ -> ResultView.showStatus(cars) }
+    ResultView.displayWinners(winners = race.getWinners())
 }