poppin_bottles.rb

def bottles_purchased
  money_redeemed = @money - (@money % 2)
  empties_redeemed = @empties - (@empties % 2)
  caps_redeemed = @caps - (@caps % 4)
  
  @money -= money_redeemed
  @total_money_redeemed += money_redeemed

  @empties -= empties_redeemed
  @total_empties_redeemed += empties_redeemed

  @caps -= caps_redeemed
  @total_caps_redeemed += caps_redeemed

  new_bottles = money_redeemed/2 + empties_redeemed/2 + caps_redeemed/4

  increment_resources(new_bottles)

  if new_bottles == 0
    return @total_bottles
  else
    bottles_purchased
  end
end

def reset_variables
  @empties = 0
  @caps = 0
  @total_money_redeemed = 0
  @total_empties_redeemed = 0
  @total_caps_redeemed = 0
  @total_bottles = 0
end

def increment_resources(n)
  @empties += n
  @caps += n
  @total_bottles += n
end


def ask_for_money
    reset_variables
    puts "How much money do you have?"
    print  "> "
    @money = gets.chomp.to_i
    bottles_purchased
    puts "You turned in #{@total_money_redeemed} dollars, #{@total_empties_redeemed} empties, #{@total_caps_redeemed} caps, and got back #{@total_bottles} bottles in all. You have #{@empties} empties and #{@caps} caps left."
    puts "NEXT CUSTOMER!"
    ask_for_money
end

ask_for_money