import com.sun.org.apache.xpath.internal.operations.Bool

/**
 * You can edit, run, and share this code.
 * play.kotlinlang.org
 */
fun String.isPalindrome(): Boolean {
    var treatedString: String = String()
    this.forEach { char ->
        if (char.isLetterOrDigit()) treatedString += char.uppercase()
    }

    return treatedString == treatedString.reversed()
}

fun calculateVolumeOfSphere(radius: Double): Double {
    return (4.0 / 3.0) * Math.PI * (radius * radius * radius)
}

fun ageMessage(age: Int) {
    when (age) {
        in Int.MIN_VALUE..<0 -> println("Unborn")
        in 0..11 -> println("Young Kid")
        in 12..17 -> println("Teenager")
        18 -> println("18 Year Old")
        in 19..21 -> println("Young Adult")
        in 22..64 -> println("Adult")
        in 65..Int.MAX_VALUE -> println("Elderly")
    }
}

fun powerCalculator(base: Int, exponent: Int): Float {
    var result: Float = base.toFloat()

    if (base == 0) return 0f
    else if (exponent == 0) return 1f

    if (exponent < 0) {
        for (loop in exponent..<-1) {
            result *= base
        }
        result = 1 / result
    } else {
        for (loop in 1..<exponent) {
            result *= base
        }
    }
    return result
}

fun Int.isPrime(): Boolean {
    if (this == 0) return false
    var tmpVar: Int = this
    if (this < 0) tmpVar *= -1

    for (loop in 2..tmpVar / 2) {
        if (tmpVar % loop == 0) return false
    }

    return true
}

fun splitList(list: List<Int>): Array<List<Int>> {
    val newList1: MutableList<Int> = mutableListOf<Int>()
    val newList2: MutableList<Int> = mutableListOf<Int>()

    for (loop in 0..<list.size) {
        if (loop % 2 == 0) newList1.add(list[loop])
        else newList2.add(list[loop])
    }

    return arrayOf(newList1, newList2)
}

class Rectangle(var width: Double, var height: Double) {
    init {
        println("Created new Rectangle with a width of $width and a height of $height")
    }

    fun area(): Double {
        return width * height
    }

    fun perimeter(): Double {
        return width * 2 + height * 2
    }

    fun isSquare(): Boolean {
        return width == height
    }
}

fun main() {
    // 1
    //println("Hello, world!!!")

    // 2
    //var myFloat: Float = 10f
    //myFloat *= 5
    //println(myFloat)

    // 3
    //val myInt1: Int = (1..10).random()
    //val myInt2: Int = (1..10).random()
    //val myInt3: Int = myInt1 / myInt2
    //println(myInt1.toString() + " / " + myInt2.toString() + " = " + myInt3.toString())

    // 4
    //val myString: String = "My String"
    //println(myString.uppercase().reversed())

    // 5
    //val myInt1: Int = 2
    //val myInt2: Int = 2
    //val myInt3: Int = 4
    //val myInt4: Int = 4
    //if ((myInt1 == myInt2 || myInt3 == myInt4) && myInt3 > myInt2) println("Either the first two integers or the last two integers are equal, and the 3rd integer is larger that the 2nd.")

    // 6
    //val myPalindrome: String = "Satan, oscillate my metallic sonatas."
    //println(myPalindrome.isPalindrome())

    // 7
    //println(calculateVolumeOfSphere(2.0))

    // 8
    //val myIntArray: Array<Int> = arrayOf(1, 2, 3, 4, 5)
    //val myStringArray: Array<String> = arrayOf("One", "Two", "Three", "Four", "Five")
    //myIntArray.forEach { println(it) }
    //myStringArray.forEach { println(it) }

    // 9
    //val myString: String = "Hello"
    //val loopAmount: Int = 5
    //var currentLoop: Int = 0
    //while (currentLoop < loopAmount) {
    //	println(myString)
    //	currentLoop++
    //}

    // 10
    //for (number in 1..42) println(number)

    // 11
    //(65..90).forEach { println(it.toChar()) }

    // 12
    //val myArray: Array<Int> = arrayOf(5, 10, 5)
    //var myResult: Int = 0
    //myArray.forEach { myResult += it }
    //println(myResult)

    // 13
    //val myArray: Array<Int> = arrayOf(5, 10, 2)
    //val myMutableList: MutableList<Int> = mutableListOf()
    //for (entry in myArray.reversed()) myMutableList += entry
    //myMutableList.forEach { println(it) }

    // 14
    //ageMessage(14)

    // 15
    //println(powerCalculator(-2, 3))

    // 16
    //println(887.isPrime())

    // 17
    //val myRectangle: Rectangle = Rectangle(5.0, 10.0)
    //println(myRectangle.area())
    //println(myRectangle.perimeter())
    //println(myRectangle.isSquare())

    // 18
    //val myList: List<Int> = listOf<Int>(1, 4, 6, 7, 8)
    //val myArray: Array<List<Int>> = splitList(myList)
    //for (item in myArray) {
    //    for (subItem in item) println(subItem)
    //}
}