brute-fast.scala

import java.time.{Duration, ZonedDateTime}

object BruteFast extends App {
  val startTime = ZonedDateTime.now

  val theCorrectPassword = "ordaindrooppodlovelyemberlogic"
//  val theCorrectPassword = "horsebutt"

//   val dictionary = scala.io.Source.fromFile("/usr/share/dict/words").getLines.toVector
  val dictionary = Vector("ordain","droop","pod","lovely","ember","logic")

  var guesses = 0L
  // single word
  def oneWordPassphrase = dictionary.iterator

  def twoWordPassphrase = for {
    w1 <- dictionary.iterator
    w2 <- dictionary.iterator
  } yield w1+w2

  def threeWordPassphrase = for {
    w1 <- dictionary.iterator
    w2 <- dictionary.iterator
    w3 <- dictionary.iterator
  } yield w1+w2+w3

  def fourWordPassphrase = for {
    w1 <- dictionary.iterator
    w2 <- dictionary.iterator
    w3 <- dictionary.iterator
    w4 <- dictionary.iterator
  } yield w1+w2+w3+w4

  def fiveWordPassphrase = for {
    w1 <- dictionary.iterator
    w2 <- dictionary.iterator
    w3 <- dictionary.iterator
    w4 <- dictionary.iterator
    w5 <- dictionary.iterator
  } yield w1+w2+w3+w4+w5

  def sixWordPassphrase = for {
    w1 <- dictionary.iterator
    w2 <- dictionary.iterator
    w3 <- dictionary.iterator
    w4 <- dictionary.iterator
    w5 <- dictionary.iterator
    w6 <- dictionary.iterator
  } yield w1+w2+w3+w4+w5+w6

  (oneWordPassphrase ++ twoWordPassphrase ++ threeWordPassphrase ++ fourWordPassphrase ++ fiveWordPassphrase ++ sixWordPassphrase)
    .find { w =>
      guesses = guesses + 1
      theCorrectPassword == w
    }
    .foreach { pp =>
      val s = Duration.between(startTime, ZonedDateTime.now).getSeconds
      println(s"Took $s seconds to guess $pp correctly ($guesses guesses)")
    }

}