#!/usr/bin/env python

from electrum import interface, Interface, DEFAULT_SERVERS
import time, Queue

servers = interface.filter_protocol(DEFAULT_SERVERS,'s')
interfaces = map ( lambda server: Interface({'server':server} ), servers )
for i in interfaces: i.start()

for i in interfaces:
    if i.is_connected:
        i.send([('blockchain.numblocks.subscribe',[])])
        i.status = "timed out"
    else:
        servers.remove(i.server)
        i.status = "unreachable"

for i in interfaces:
    while True:
        try:
            r = i.get_response(timeout=1)
        except Queue.Empty:
            break

        if r.get('method') == 'blockchain.numblocks.subscribe':
            servers.remove(i.server)
            i.status = "ok"
            i.blocks = r.get('result')
            break


from collections import defaultdict
d = defaultdict(int)
for i in interfaces:
    if i.status == 'ok':
        d[i.blocks] += 1
v = d.values()
numblocks = d.keys()[v.index(max(v))]

for i in interfaces:
    if i.status == 'ok':
        if abs(i.blocks-numblocks)>1: i.status = "lagging" 
    else:
        i.blocks = 0
    print "%30s   %d   %s   "%(i.host, i.blocks, i.status)