#! /usr/bin/python3
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from __future__ import absolute_import, division, print_function
import zmq
import uuid
import sys
from optparse import OptionParser
import otestpoint.interface.discovery_pb2

usage = "%prog [OPTION]... ENDPOINT"

usage = """%prog [OPTION]... ENDPOINT

  ENDPOINT     TestPoint publisher
               <hostname>:port | <IPv4>:port | [<IPv6>]:port"""

description="""Query an OpenTestPoint publisher to get the list of test probes it
publishes."""

optionParser = OptionParser(usage=usage,
                            description=description)

(options, args) = optionParser.parse_args()

if len(args) < 1:
  print("missing endpoint")
  exit(1)


context = zmq.Context()

client = context.socket(zmq.REQ)

client.setsockopt(zmq.IPV4ONLY,0)

client.connect("tcp://%s" % args[0])

request = otestpoint.interface.discovery_pb2.DiscoveryRequest()
request.type =  otestpoint.interface.discovery_pb2.DiscoveryRequest.TYPE_DISCOVERY
client.send(request.SerializeToString())

msg = client.recv()

response =  otestpoint.interface.discovery_pb2.DiscoveryResponse()

response.ParseFromString(msg)

if response.type == \
   otestpoint.interface.discovery_pb2.DiscoveryResponse.TYPE_DISCOVERY:
  print(response.discovery.publish)
  for probe in response.discovery.names:
    print(probe)

elif response.type == \
     otestpoint.interface.discovery_pb2.DiscoveryResponse.TYPE_ERROR:
  print(response.error.what, file=sys.stderr)
  exit(1)

else:
  print("unknown discovery response", file=sys.stderr)
  exit(1)
