gistfile1.scala

import javax.sound.sampled.ReverbType

import Cell.Percent
import scala.util.Random

trait Revealable {
  var caster: Option[Cell] = None
  def reveal()(implicit isBomb : Boolean, bombCount : Int)
  def subscribe(caster:Cell): Unit ={
    this.caster.map { _.onClick() }
  }
  def click(){ caster.onClick()}
}
class Cell(val revealable : Revealable, _top : => Option[Cell], _bot : => Option[Cell],
                     _right : => Option[Cell], _left : => Option[Cell])(implicit bombChance: Percent)
{

  revealable.subscribe(this);

  lazy val top :Option[Cell] = _top
  lazy val bot :Option[Cell] = _bot
  lazy val right :Option[Cell] = _right
  lazy val left :Option[Cell] = _left
   
  val neighbours = List[Option[Cell]](
    top,  bot, right, left,
    top flatMap {_.left} orElse None,
    top flatMap {_.right} orElse None,
    bot flatMap {_.left} orElse None,
    bot flatMap {_.right} orElse None
  )
  implicit lazy val isBomb = Random.nextDouble() < bombChance.value
  implicit lazy val bombCount = neighbours count { _ exists { _.isBomb }}

  def onClick() = {
    revealable.reveal()
    if(!isBomb && bombCount == 0) neighbours map { _ map { _.isBomb }}
  }
  def check() : Unit = {
    if(bombCount == 0)
    {
      revealable.reveal()
      neighbours.flatten.map {_.check()}
    }
  }

}
object Cell {
  case class Percent(value: Int) {
    require( value <= 100 && value >= 0, "Must be 0..100")
  }
  def produceMatrix(width: Int, height : Int)(fillWith : => Revealable)(implicit bombChance: Percent)  = {
    var arr: Array[Array[Cell]] = Array(Array())
    def get(x:Int, y: Int) = arr lift x flatMap { _ lift y }
    arr = Array.tabulate(height, width) {
      (x, y) => new Cell(fillWith,
        get(x, y-1),
        get(x, y+1),
        get(x+1, y),
        get(x-1, y)
      )
    }
    arr
  }
}