Grok Scala - Dallas - Thor

import math._
import scala.util._

object Player {

    case class Coordinate(x: Int, y: Int)
    case class Universe(lightOfPower: Coordinate, thorsPosition: Coordinate) {
        def getDirection: (Universe, String) = {
    val (we, x2) =
      if (thorsPosition.x < lightOfPower.x)
        ("E", thorsPosition.x + 1)
      else
        if (thorsPosition.x > lightOfPower.x)
          ("W", thorsPosition.x - 1)
        else
          ("", thorsPosition.x)
    val (ns, y2) =
      if (thorsPosition.y < lightOfPower.y)
        ("S", thorsPosition.y + 1)
      else
        if (thorsPosition.y > lightOfPower.y)
          ("N", thorsPosition.y - 1)
        else
          ("", thorsPosition.y)
    (copy(thorsPosition = Coordinate(x2, y2)), ns + we)
        }
    }

    def readInputInitial: Universe = {
        val coordinates: Array[Int] =
          for(i <- readLine split " ")
            yield i.toInt
        val result =
          Universe(
                Coordinate(coordinates(0), coordinates(1))
              , Coordinate(coordinates(2), coordinates(3))
          )
        Console.err.println("readInputInitial.result=" + result)
        result
    }

    def readInputLoop: Int = {
        val result =
          readInt
        Console.err.println("readInputLoop.result=" + result)
        result
    }

    //def response(universe: Universe): (Coordinate, String) = {
    //    //TODO: fill in the logic to figure out the actual logic to produce both the coordinate and the command
    //    (Coordinate(universe.thor.x + 1, universe.thor.y + 1), "SE")
    //}

    def main(args: Array[String]) {
        var universe: Universe =
          readInputInitial
        // game loop
        while(readInputLoop > 0) {
            val (universeNew, command): (Universe, String) =
              universe.getDirection
            universe =
              universeNew
            Console.err.println(s"universe=$universe, command=$command")
            println(command) // A single line providing the move to be made: N NE E SE S SW W or NW
        }
    }
}