class PingPool
  def initialize(count)
    @count = count
    DATA.each_line do |line|
      line = line.strip
      next if line.start_with? '#'
      next if line == ''
      if line.index("#(")
        self.batch /#(\(.*\))/, line
      elsif line.index("#[")
        self.batch /#(\[.*\])/, line
      else
        self.run line
      end
    end
  end

  def batch(reg, line)
    list = eval reg.match(line)[1]
    list.each do |idx|
      url = $` + idx.to_s + $'
      self.run url
    end
  end

  def run(url)
    puts "Pinging #{url} #{@count} times."
    res = `ping -c #{@count} #{url}`
    if res == ""
      puts "Unknown host\n"
      return
    end
    res = res.split("\n")
    self.pretty(res)
    puts ''
  end

  def pretty(res)
    puts res[-2].split(',')[2].strip
    puts ("avg=#{res[-1].split(' ')[3].split('/')[1]} ms")
  end
end

if $0 == __FILE__
  count = 10
  if ARGV[0]
    count = ARGV[0].to_i
    count = 10 if count == 0
  end

  PingPool.new(count)
end

__END__
# this is one line comment

# ping urls in file data, default 10 times, usage:
#   ./this_file [count]
# count is default set to 10, here is an example:
#   $ ruby this_file 4

# ping normal.com
# outs puts looks like:
#   Pinging normal.com 10 times.
#   10.0% packet loss
#   avg=36.251 ms
normal.com

# this equals ping
#   some1.url.com
#   some2.url.com
#   some3.url.com
some#(1..3).url.com

# this equals ping
#   other4.url.com
#   otherd.url.com
other#[4,'d'].url.com