#!/usr/bin/env ruby

require "English"
require "rexml/document"

def passenger_status
  @passenger_status ||= REXML::Document.new(`/usr/sbin/passenger-status --show=xml`)
end

def output_config
  puts <<~CONFIG
    graph_args --lower-limit 0
    graph_category passenger
    graph_title Passenger processes
    graph_order active inactive
    graph_vlabel processes
    graph_total total

    active.label busy servers
    active.draw AREA
    inactive.label idle servers
    inactive.draw STACK
  CONFIG
  exit 0
end

def output_values
  active = 0
  inactive = 0

  passenger_status.get_elements("//process").each do |process|
    if process.text("sessions").to_i.positive?
      active += 1
    else
      inactive += 1
    end
  end

  puts "active.value #{active}"
  puts "inactive.value #{inactive}"
end

if ARGV[0] == "config"
  output_config
else
  output_values
end