print("Connecting to pi")

import grpc
from concurrent import futures
from .MotorServer import MotorServicer
from . import motorService_pb2_grpc
import random
from threading import Timer

throttle = 0
timer = None

class ThrottleIterator:
    '''
    Class to get the current throttle for the car.
    Will return a random throttle between 
    '''
    def __iter__(self):
       return self

    def __next__(self):
        if throttle > 1 or throttle < -1:
            raise StopIteration
        return throttle


def serve():
  server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
  motorService_pb2_grpc.add_CarControlServicer_to_server(
      MotorServicer(), server)
  server.add_insecure_port('[::]:50051')
  server.start()

def resetThrottle():
    global throttle
    throttle = random.random() * 2 - 1
    global timer
    if timer is not None:
        timer.cancel()
    timer = Timer(10, resetThrottle)

serve()

timer = Timer(10, resetThrottle)

channel = grpc.insecure_channel('localhost:50051')
stub = motorService_pb2_grpc.CarControlStub(channel)

stub.SetThrottle(ThrottleIterator())