My homework is done

src/main/kotlin/ru/otus/cars/Car.kt

@@ -19,6 +19,10 @@ interface Car : CarInput {
      */
     val carOutput: CarOutput
 
+    val tank: Tank
+    val tankMouth: TankMouth
+
+
     /**
      * Получить оборудование
      */

src/main/kotlin/ru/otus/cars/CarOutput.kt

@@ -8,4 +8,6 @@ interface CarOutput {
      * Скажи текущую скорость
      */
     fun getCurrentSpeed(): Int
+
+    fun getFuelContents(): Int
 }

src/main/kotlin/ru/otus/cars/FuelStation.kt

@@ -0,0 +1,22 @@
+package ru.otus.cars
+
+class FuelStation {
+    fun carRefuel(car: Car, liters: Int){
+        val tankMouth = car.tankMouth
+        try {
+            if (tankMouth is TankMouth.PetrolMouth){
+                (tankMouth as TankMouth.PetrolMouth).fuelPetrol(liters)
+            } else {
+                (tankMouth as TankMouth.LpgMouth).fuelLpg(liters)
+            }
+        } catch (e: Exception){
+            println(e.toString())
+        }
+    }
+
+    fun carsRefuel(cars: List<Car>){
+        cars.forEach({ it.tank.getContents() })
+        cars.forEach({ carRefuel(it, 50) })
+        cars.forEach({ it.tank.getContents() })
+    }
+}

src/main/kotlin/ru/otus/cars/FuelType.kt

@@ -0,0 +1,6 @@
+package ru.otus.cars
+
+enum class FuelType () {
+    PETROL,
+    LPG
+}

src/main/kotlin/ru/otus/cars/Tank.kt

@@ -0,0 +1,15 @@
+package ru.otus.cars
+
+class Tank() {
+
+    lateinit var mouth: TankMouth
+
+    private var currentFuelLevel: Int = 0
+
+    fun getContents(): Int{
+        return currentFuelLevel
+    }
+    fun receiveFuel(liters: Int){
+        currentFuelLevel += liters
+    }
+}

src/main/kotlin/ru/otus/cars/TankMouth.kt

@@ -0,0 +1,39 @@
+package ru.otus.cars
+
+sealed class TankMouth {
+
+    abstract fun open()
+    abstract fun close()
+
+    class LpgMouth(val tank: Tank): TankMouth(){
+        fun fuelLpg(liters: Int){
+            open()
+            tank.receiveFuel(liters)
+            close()
+        }
+
+        override fun open() {
+            println("Горловина бака открыта")
+        }
+
+        override fun close() {
+            println("Горловина бака закрыта")
+        }
+    }
+
+    class PetrolMouth(val tank: Tank): TankMouth() {
+        fun fuelPetrol(liters: Int){
+            open()
+            tank.receiveFuel(liters)
+            close()
+        }
+
+        override fun open() {
+            println("Горловина баллона открыта")
+        }
+
+        override fun close() {
+            println("Горловина баллона закрыта")
+        }
+    }
+}

src/main/kotlin/ru/otus/cars/Taz.kt

@@ -7,6 +7,11 @@ object Taz: Car {
     override val plates: Car.Plates
         get() = throw NotImplementedError("Номера сняты")
 
+    override val tankMouth: TankMouth
+        get() = throw Exception("Взрыв")
+
+    override val tank: Tank = Tank()
+
     /**
      * Цвет машины
      */

src/main/kotlin/ru/otus/cars/Vaz2107.kt

@@ -20,8 +20,9 @@ class Vaz2107 private constructor(color: String) : VazPlatform(color) {
         override fun build(plates: Car.Plates): Vaz2107 = Vaz2107("Зеленый").apply {
             this.engine = getRandomEngine()
             this.plates = plates
+            this.tank = getTank()
+            this.tankMouth = tank.mouth
         }
-
         /**
          * Проверь, ездит или нет
          */
@@ -48,7 +49,21 @@ class Vaz2107 private constructor(color: String) : VazPlatform(color) {
         println("Др-др-др-др....")
     }
 
-    private var currentSpeed: Int = 0 // Скока жмёт
+    private var currentSpeed: Int = 0// Скока жмёт
+    private var fuelType = FuelType.LPG
+    private fun getTank(): Tank {
+        val tank = Tank()
+        val mouth = if (fuelType == FuelType.PETROL){
+            TankMouth.PetrolMouth(tank)
+        } else {
+            TankMouth.LpgMouth(tank)
+        }
+        tank.mouth = mouth
+        return tank
+    }
+
+    override lateinit var tank: Tank
+    override lateinit var tankMouth: TankMouth
 
     /**
      * Доступно сборщику
@@ -74,5 +89,11 @@ class Vaz2107 private constructor(color: String) : VazPlatform(color) {
         override fun getCurrentSpeed(): Int {
             return [email protected]
         }
+
+        override fun getFuelContents(): Int {
+            return [email protected]().getContents()
+        }
     }
+
+
 }

src/main/kotlin/ru/otus/cars/Vaz2108.kt

@@ -21,6 +21,8 @@ class Vaz2108 private constructor(color: String) : VazPlatform(color) {
         override fun build(plates: Car.Plates): Vaz2108 = Vaz2108("Красный").apply {
             this.engine = getRandomEngine()
             this.plates = plates
+            this.tank = getTank()
+            this.tankMouth = tank.mouth
         }
 
         fun alignWheels(vaz2108: Vaz2108) {
@@ -53,6 +55,20 @@ class Vaz2108 private constructor(color: String) : VazPlatform(color) {
     }
 
     private var currentSpeed: Int = 0 // Скока жмёт
+    private var fuelType = FuelType.PETROL
+    private fun getTank(): Tank {
+        val tank = Tank()
+        val mouth = if (fuelType == FuelType.PETROL){
+            TankMouth.PetrolMouth(tank)
+        } else {
+            TankMouth.LpgMouth(tank)
+        }
+        tank.mouth = mouth
+        return tank
+    }
+
+    override lateinit var tank: Tank
+    override lateinit var tankMouth: TankMouth
 
     /**
      * Доступно сборщику
@@ -78,5 +94,9 @@ class Vaz2108 private constructor(color: String) : VazPlatform(color) {
         override fun getCurrentSpeed(): Int {
             return [email protected]
         }
+
+        override fun getFuelContents(): Int {
+            return [email protected]().getContents()
+        }
     }
 }