#!/usr/bin/env python2.7

from __future__ import print_function
import sys
import time
import optparse
from collections import defaultdict
import os
import subprocess

states = {
    0: "OK",
    1: "WARNING",
    2: "CRITICAL",
    3: "UNKNOWN"
}

if 'USER' in os.environ and not os.environ['USER'] in ['root', 'rabbitmq']:
    print("This script must be run as the root or rabbitmq user")


usage = """Usage: check-rabbitmq-consumers --queue=[queue-name] --min-threshold=[min-threshold]"""

parser = optparse.OptionParser(usage=usage)
parser.add_option('--queue',
                  dest='queue_name',
                  default="notify_tornado",
                  action='store')
parser.add_option('--min-threshold',
                  dest='min_count',
                  type="int",
                  default=1,
                  action='store')

(options, args) = parser.parse_args()

output = subprocess.check_output(['/usr/sbin/rabbitmqctl', 'list_consumers'], shell=False)

consumers = defaultdict(int)

for line in output.split('\n'):
    parts = line.split('\t')
    if len(parts) and parts[0] == options.queue_name:
        consumers[parts[0]] += 1


now = int(time.time())

if consumers[options.queue_name] < options.min_count:
    status = 2
else:
    status = 0

print("%s|%s|%s|queue %s has %s consumers, needs %s" % (
            now, status, states[status], options.queue_name,
            consumers[options.queue_name], options.min_count))