#!/usr/bin/env python

import os
from time import time
from urllib2 import urlopen, Request

from vendor.munin import MuninPlugin

class MuninRequestTimePlugin(MuninPlugin):
    title = "Request Time"
    args = "--base 1000"
    vlabel = "seconds"
    info = "Time for a request to complete"

    def __init__(self):
        super(MuninRequestTimePlugin, self).__init__()
        self.bound_time = float(os.environ['RT_BOUND_TIME']) if 'RT_BOUND_TIME' in os.environ else None
        self.urls = []
        for k, v in os.environ.iteritems():
            if k.startswith('RT_URL'):
                name, url = tuple(v.split('=', 1))
                url = url.split('|')
                headers = {}
                if len(url) > 1:
                    headers = dict(x.split('=') for x in url[1:])
                url = url[0]
                self.urls.append((name, url, headers))
        self.urls.sort()

    @property
    def fields(self):
        return [
            (name, dict(
                label = name,
                type = "GAUGE",
                min = "0",
            )) for name, url, headers in self.urls
        ]

    def execute(self):
        values = {}
        for name, url, headers in self.urls:
            t = time()
            req = Request(url, headers=headers)
            urlopen(req).read()
            dt = time() - t
            if self.bound_time:
                dt = min(dt, self.bound_time)
            values[name] = "%.2f" % dt
        return values

if __name__ == "__main__":
    MuninRequestTimePlugin().run()