import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.activity.enableEdgeToEdge
import androidx.compose.foundation.layout.*
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.dp
import kotlin.math.PI

// Base class: Dwelling
open class Dwelling(val resident: Int) {
    open val buildingMaterial: String = "Generic Material"
    open val capacity: Int = 0

    fun hasRoom(): Boolean {
        return resident < capacity
    }

    open fun description(): String {
        return "This dwelling is made of $buildingMaterial and has space for $capacity residents."
    }
}

// RoundHut subclass
class RoundHut(resident: Int) : Dwelling(resident) {
    override val buildingMaterial: String = "Straw"
    override val capacity: Int = 4

    fun floorArea(radius: Double): Double {
        return PI * radius * radius
    }

    override fun description(): String {
        return "This round hut is made of $buildingMaterial and has space for $capacity residents."
    }
}

// SquareCabin subclass
class SquareCabin(resident: Int) : Dwelling(resident) {
    override val buildingMaterial: String = "Wood"
    override val capacity: Int = 6

    fun floorArea(length: Double): Double {
        return length * length
    }

    override fun description(): String {
        return "This square cabin is made of $buildingMaterial and has space for $capacity residents."
    }
}

// RoundTower subclass
class RoundTower(resident: Int, val floors: Int) : Dwelling(resident) {
    override val buildingMaterial: String = "Wood"
    override val capacity: Int = 4 * floors

    fun floorArea(radius: Double): Double {
        return PI * radius * radius * floors
    }

    override fun description(): String {
        return "This round tower is made of $buildingMaterial and has space for $capacity residents."
    }
}

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContent {
            DwellingApp()
        }
    }
}

@Composable
fun DwellingApp() {
    val hut = RoundHut(3)
    val cabin = SquareCabin(5)
    val tower = RoundTower(4, 3)

    Column(
        modifier = Modifier
            .fillMaxSize()
            .padding(16.dp),
        horizontalAlignment = Alignment.CenterHorizontally,
        verticalArrangement = Arrangement.Center
    ) {
        Text(text = hut.description())
        Spacer(modifier = Modifier.height(8.dp))
        Text(text = "Floor Area: ${hut.floorArea(4.5)}")
        Spacer(modifier = Modifier.height(8.dp))
        Text(text = cabin.description())
        Spacer(modifier = Modifier.height(8.dp))
        Text(text = "Floor Area: ${cabin.floorArea(4.5)}")
        Spacer(modifier = Modifier.height(8.dp))
        Text(text = tower.description())
        Spacer(modifier = Modifier.height(8.dp))
        Text(text = "Floor Area: ${tower.floorArea(4.5)}")
    }
}