AoC 2022 Day 2

day2.kt

package day2

import java.io.File

fun main() {
    val list = day1.readFileLineByLine("src/main/kotlin/day2/input.txt");
    var totalScore = 0;
    list.forEach{
        val tokens = it.split(" ");
        totalScore += getWinScore(tokens[0],tokens[1]);
        totalScore += getShapeScore(tokens[1]);
    }
    println("Part 1:$totalScore");


    var totalScorePart2 = 0;
    list.forEach{
        val tokens = it.split(" ");
        totalScorePart2 += getDesiredScore(tokens[0],tokens[1]);
    }
    println("Part 1:$totalScorePart2");
}

fun getDesiredScore(other:String, desired:String): Int{
    when(other){
        "A" -> return when(desired){
            "X" -> 0 + 3;
            "Y" -> 3 + 1;
            "Z" -> 6 + 2;
            else -> {
                throw IllegalArgumentException("invalid args me=$desired")
            }
        }
        "B" -> return when(desired) {
            "X" -> 0 + 1;
            "Y" -> 3 + 2;
            "Z" -> 6 + 3;
            else -> {
                throw IllegalArgumentException("invalid args me=$desired")
            }
        }
        "C" -> return when(desired) {
            "X" -> 0 + 2;
            "Y" -> 3 + 3;
            "Z" -> 6 + 1;
            else -> {
                throw IllegalArgumentException("invalid args me=$desired")
            }
        }
        else -> {
            throw IllegalArgumentException("invalid args other=$other")
        }
    }
}

fun getWinScore(other: String, me: String): Int {
    when (other) {
        "A" -> return when (me) {
            "X" -> 3;
            "Y" -> 6;
            "Z" -> 0;
            else -> {
                throw IllegalArgumentException("invalid args me=$me")
            }
        }

        "B" -> return when (me) {
            "X" -> 0;
            "Y" -> 3
            "Z" -> 6;
            else -> {
                throw IllegalArgumentException("invalid args me=$me")
            }
        }

        "C" -> return when (me) {
            "X" -> 6;
            "Y" -> 0;
            "Z" -> 3
            else -> {
                throw IllegalArgumentException("invalid args me=$me")
            }
        }

        else -> {
            throw IllegalArgumentException("invalid args other=$other")
        }
    }
}

fun getShapeScore(myShape: String):Int {
    return when (myShape) {
        "X" -> 1;
        "Y" -> 2;
        "Z" -> 3;
        else -> {
            throw IllegalArgumentException("invalid args myShape=$myShape")
        }
    }
}


fun readFileLineByLine(fileName: String): MutableList<String> {
    val result = mutableListOf<String>();
    File(fileName).forEachLine { result.add(it) }
    return result;
}