OOP Playground

TheGunShoots.kt

fun main() {
    val shotGun = ShotGun("S12K", "Brown").apply {
        projectile = 3
    }

    val deagle = Deagle("Deagle", "Red").apply {
        projectile = 3
    }

    val snipper = Snipper().apply {
        selectedGun = shotGun
    }

    val info1 = snipper.selectedGun?.type.orEmpty()
    val info2 = snipper.selectedGun?.color.orEmpty()
    println(info1)
    println(info2)
    repeat(3) {
        snipper.shoot()
    }

    println("\n================================= next gun >>>>>\n")

    snipper.selectedGun = deagle
    val info3 = snipper.selectedGun?.type.orEmpty()
    val info4 = snipper.selectedGun?.color.orEmpty()
    println(info3)
    println(info4)
    repeat(3) {
        snipper.shoot()
    }

}

abstract class Gun(val type: String, val color: String) : TheGunListener {
    internal var projectile: Int = 0

    internal fun showStatusShot(projectileRemain: Int) {
        if (projectileRemain > 0) {
            println("Completed. The projectile was $projectileRemain")
        } else {
            println("Failed. Please reload")
        }
    }
}

class ShotGun(curType: String, curColor: String) : Gun(curType, curColor) {

    override fun onShotListener() {
        this.projectile--
        showStatusShot(this.projectile)
    }

}

class Deagle(curType: String, curColor: String) : Gun(curType, curColor) {

    override fun onShotListener() {
        this.projectile -= 2
        showStatusShot(this.projectile)
    }

}

class Snipper {
    var selectedGun: Gun? = null
    fun shoot() {
        this.selectedGun?.onShotListener()
    }
}

interface TheGunListener {
    fun onShotListener()
}