#!/usr/bin/env ruby

require 'calc24'

begin
  # validate user input
  digits = ARGV.to_i
  
  raise "need 4 digits, such as: 5 9 5 9" unless digits.size == 4
  
  t0 = Time.now 
  player = Calc24::TwentyFourGamePlayer.new(digits)

  if player.solutions.empty?
    puts "no solutions"
  else
    puts "found #{player.solutions.size} solutions:"
    #STDIN.gets
    puts player.solutions.values.join("\n").to_p
    puts "#{Time.now - t0}s"
  end
rescue Exception => e
  print "#{e.class}: " unless e.class == RuntimeError
  puts "#{e.message}"
  exit 1
end