#!/usr/bin/python3
import json
from urllib.request import urlopen
from pprint import pprint
import sys

JSON_URL = "https://netinfo.freifunk-stuttgart.de/json/alfred-json-159.json"

if len(sys.argv) != 2:
    print("UNKNOWN: Invalid arguments "+sys.argv[0]+" <node mac>")
    exit(3)
node_mac = sys.argv[1]

response = urlopen(JSON_URL)
data = json.loads(response.read().decode("utf-8"))

node = {}
try:
    node = data[node_mac]
except KeyError as e:
    print("CRITICAL: Node not found: "+str(e))
    exit(2)

performance_data = ""

for key,value in node['clients'].items():
    performance_data += "|"+str(key)+"="+str(value)+"\n"

print("OK - %d Clients"%node['clients']['total']+performance_data)
exit(0)