#!/usr/bin/env python

# This is a munin plugin which pulls data from the server in
# misc/operations_helpers/spacetime/diskwatcher.tac . It produces a graph of how much time is
# left before the grid fills up. The plugin should be configured with
# env_url= pointing at the diskwatcher.tac webport.

import os, sys, urllib, json

if len(sys.argv) > 1 and sys.argv[1] == "config":
    print """\
graph_title Tahoe Remaining Time Predictor
graph_vlabel days remaining
graph_category tahoe
graph_info This graph shows the estimated number of days left until storage space is exhausted
days_1hr.label days left (one hour sample)
days_1hr.draw LINE1
days_1day.label days left (one day sample)
days_1day.draw LINE1
days_2wk.label days left (two week sample)
days_2wk.draw LINE2
days_4wk.label days left (four week sample)
days_4wk.draw LINE2"""
    sys.exit(0)

url = os.environ["url"]
timespans = json.load(urllib.urlopen(url))["rates"]

data = dict([(name, timeleft)
             for (name, timespan, growth, timeleft) in timespans
             if timeleft])
# timeleft is in seconds
DAY = 24*60*60
if "1hr" in data:
    print "days_1hr.value", data["1hr"]/DAY
if "1day" in data:
    print "days_1day.value", data["1day"]/DAY
if "2wk" in data:
    print "days_2wk.value", data["2wk"]/DAY
if "4wk" in data:
    print "days_4wk.value", data["4wk"]/DAY