#!/usr/bin/env python

from electrum import Interface, DEFAULT_SERVERS
import time, Queue

servers = DEFAULT_SERVERS
interfaces = map ( lambda server: Interface({'server':server} ), servers )
results = []

for i in interfaces:
    if i.is_connected:
        i.start()
        i.send([('blockchain.numblocks.subscribe',[])])
    else:
        servers.remove(i.server)

for i in interfaces:
    while True:
        try:
            r = i.responses.get(True,1)
        except Queue.Empty:
            break

        if r.get('method') == 'blockchain.numblocks.subscribe':
            results.append((i.host, r.get('result')))
            servers.remove(i.server)
            break

for s in servers:
    print "%30s    "%s, "timed out"

from collections import defaultdict
d = defaultdict(int)
for e in results:
    d[e[1]] += 1
v = d.values()
numblocks = d.keys()[v.index(max(v))]

for s,n in results:
    print "%30s   %d   "%(s, n), "ok" if abs(n-numblocks)<2 else "lagging"