#######################################################################
# Programming challenge 2: Guess my number                            #
# To solve this challenge you need to know how to use a 'while' loop  #
# You need to know how to get user input from the command line        #
# Also how to normalize the input (removing trailing whitespaces)     #
# You should know about if-clauses and numeric comparisons, like '>'  #
# How to write methods                                                #
# And you should know what sequences are, e.g. 1..100                 #
#######################################################################
class Chooser
  def initialize(lower_bound, upper_bound)
    @number = rand(lower_bound..upper_bound)
    @steps = 0
  end

  def guess(number)
    @steps = @steps + 1

    if (@number == number)
      puts "Congratulations, the number is #{@number} and you needed #{@steps} steps!"
      return "correct"
    elsif @number > number
      return "greater"
    else
      return "smaller"
    end

  end
end

def ask_human(chooser, lower_bound, upper_bound)
  response = ""
  while response != "correct"

    # TODO: ask the user for input!
    # TODO: you can convert a string "42" to the number 42 by calling "42".to_i
  end
end

def computer_search(chooser, lower_bound, upper_bound)
  # TODO: implement a smarter solution than just guessing randomly
  response = ""
  while response != "correct"
    # 'rand' generates a random number in a sequence
    # you don't need to know how it works
    # because you can replace it with sth. better
    a_number = rand(lower_bound..upper_bound)
    response = chooser.guess(a_number)
  end
end

lower_bound = 1
upper_bound = 100
chooser = Chooser.new(lower_bound, upper_bound)

# TODO: implement and call 'ask_human'
#ask_human(chooser, lower_bound, upper_bound)
computer_search(chooser, lower_bound, upper_bound)