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  """The Python implementation of the gRPC route guide client."""
  
  from __future__ import print_function
  
  import random
  import time
  
  import grpc
  
  import route_guide_pb2
  import route_guide_pb2_grpc
  import route_guide_resources
  
  
  def make_route_note(message, latitude, longitude):
    return route_guide_pb2.RouteNote(
        message=message,
        location=route_guide_pb2.Point(latitude=latitude, longitude=longitude))
  
  
  def guide_get_one_feature(stub, point):
    feature = stub.GetFeature(point)
    if not feature.location:
      print("Server returned incomplete feature")
      return
  
    if feature.name:
      print("Feature called %s at %s" % (feature.name, feature.location))
    else:
      print("Found no feature at %s" % feature.location)
  
  
  def guide_get_feature(stub):
    guide_get_one_feature(stub, route_guide_pb2.Point(latitude=409146138, longitude=-746188906))
    guide_get_one_feature(stub, route_guide_pb2.Point(latitude=0, longitude=0))
  
  
  def guide_list_features(stub):
    rectangle = route_guide_pb2.Rectangle(
        lo=route_guide_pb2.Point(latitude=400000000, longitude=-750000000),
        hi=route_guide_pb2.Point(latitude=420000000, longitude=-730000000))
    print("Looking for features between 40, -75 and 42, -73")
  
    features = stub.ListFeatures(rectangle)
  
    for feature in features:
      print("Feature called %s at %s" % (feature.name, feature.location))
  
  
  def generate_route(feature_list):
    for _ in range(0, 10):
      random_feature = feature_list[random.randint(0, len(feature_list) - 1)]
      print("Visiting point %s" % random_feature.location)
      yield random_feature.location
      time.sleep(random.uniform(0.5, 1.5))
  
  
  def guide_record_route(stub):
    feature_list = route_guide_resources.read_route_guide_database()
  
    route_iterator = generate_route(feature_list)
    route_summary = stub.RecordRoute(route_iterator)
    print("Finished trip with %s points " % route_summary.point_count)
    print("Passed %s features " % route_summary.feature_count)
    print("Travelled %s meters " % route_summary.distance)
    print("It took %s seconds " % route_summary.elapsed_time)
  
  
  def generate_messages():
    messages = [
        make_route_note("First message", 0, 0),
        make_route_note("Second message", 0, 1),
        make_route_note("Third message", 1, 0),
        make_route_note("Fourth message", 0, 0),
        make_route_note("Fifth message", 1, 0),
    ]
    for msg in messages:
      print("Sending %s at %s" % (msg.message, msg.location))
      yield msg
      time.sleep(random.uniform(0.5, 1.0))
  
  
  def guide_route_chat(stub):
    responses = stub.RouteChat(generate_messages())
    for response in responses:
      print("Received message %s at %s" % (response.message, response.location))
  
  
  def run():
    channel = grpc.insecure_channel('localhost:50051')
    stub = route_guide_pb2_grpc.RouteGuideStub(channel)
    print("-------------- GetFeature --------------")
    guide_get_feature(stub)
    print("-------------- ListFeatures --------------")
    guide_list_features(stub)
    print("-------------- RecordRoute --------------")
    guide_record_route(stub)
    print("-------------- RouteChat --------------")
    guide_route_chat(stub)
  
  
  if __name__ == '__main__':
    run()
  