import urllib2
import sys
import os
import yaml

def __run__(params):
    try:
        thresholds = yaml.load(params.get('thresholds'))
        noproxy = params.get("noproxy", False)
        if noproxy: 
            urllib2.getproxies = lambda: {}
            os.environ['no_proxy'] = '127.0.0.1,localhost'
        url = params.get("url", "http://localhost/server-status?auto")
        
    except Exception, e:
        return [2, "CRITICAL - Error: %s" % repr(e)]

    try:
        busy = idle = free = 0
        for line in [ line.split() for line in urllib2.urlopen(url).read().split("\n") if line ]:
            if line[0] == "Scoreboard:":
                idle = line[1].count("_")
                free = line[1].count(".")
                busy = len(line[1]) - (idle + free)

        perfdata = []
        perfdata.append(("workers_busy", str(busy)))
        perfdata.append(("workers_idle", str(idle)))
        perfdata.append(("workers_free", str(free)))
        perfdata = "|".join([ "=".join(x) for x in perfdata])

        total = busy + idle + free
        use = (float(busy) / float(total)) * 100
        if use > thresholds['critical']:
            return [2, "CRITICAL - %d (%.2f%%) busy apache workers (%d max)" % (busy, use, total), perfdata]
        elif use > thresholds['warning']:
            return [1, "WARNING - %d (%.2f%%) busy apache workers (%d max)" % (busy, use, total), perfdata]
        else:
            return [0, "OK - %d (%.2f%%) busy apache workers (%d max)" % (busy, use, total), perfdata]
    except Exception, e:
        return [2, "CRITICAL - Error: %s" % repr(e)]