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#!/usr/bin/env ruby19

class Job
  def initialize(line)
    @f = line.split
  end

  def user
    @f[1]
  end

  def status
    @f[2]
  end

  def running?
    status == 'RUN'
  end
end

stats = Hash.new {|h,k| h[k] = {:running => 0, :other => 0} }
`bjobs -u all | grep -v JOBID`.each_line do |line|
  j = Job.new(line)
  if j.running?
    stats[j.user][:running] += 1
  else
    stats[j.user][:other] += 1
  end
end

total_run    = 0
total_others = 0

puts "-" * 80
stats.each do |user, jobs|
  printf "%8s"         % user
  printf ": R{%3s}"     % jobs[:running]
  printf ": O{%3s}" % jobs[:other]
  printf ": T{%3s}\n" % (jobs[:other] + jobs[:running])
  total_run    += jobs[:running]
  total_others += jobs[:other]
end

puts "-" * 80
puts "Total (R)  : #{total_run}"
puts "Total (O)  : #{total_others}"
puts "      (R+O): #{total_others + total_run}"

puts "-" * 80
a_hosts = `bjobs -u all | grep RUN | awk '{print $6}' | sort | uniq | wc -l`
puts "# Active hosts: " + a_hosts