import pickle
import sys
from random import randrange

from shared import daf
from shared.TrafficLightColor import Color
from shared.message_broker_wrapper import MBWrapper

sys.modules['daf'] = daf


class Orchestrator:
    vins = []
    tls = {}

    _daf_mbs = {}
    _velocity_mbs = {}

    def __init__(self):
        # TODO fetch available car VINs from Entity Ident
        self.vins.append('SB164ABN1PE082000')
        self.vins.append('SB999ABN1PE082111')
        self.vins.append('SB555ABN1PE082555')
        print('vins', self.vins)

        # TODO fetch available TLs from Entity Ident
        self.tls['traffic-light-1'] = {'color': Color.RED, 'switching_time': 120}
        self.tls['traffic-light-2'] = {'color': Color.GREEN, 'switching_time': 240}
        self.tls['traffic-light-3'] = {'color': Color.RED, 'switching_time': 360}
        print('tls', self.tls)

    def setup_msg_queues(self):
        for vin in self.vins:
            daf_channel = MBWrapper(exchange_name='vehicle_daf_{}'.format(vin), callback=self.handle_daf_receive)
            daf_channel.setup_receiver()
            self._daf_mbs[vin] = daf_channel

            velocity_channel = MBWrapper(exchange_name='vehicle_velocity_{}'.format(vin))
            velocity_channel.setup_sender()
            self._velocity_mbs[vin] = velocity_channel

        for tl in self.tls:
            tl_channel = MBWrapper(exchange_name='traffic_light_state_{}'.format(tl), callback=self.handle_tl_state_receive)
            tl_channel.setup_receiver()

    def handle_daf_receive(self, msg):
        received_daf_object = pickle.loads(msg)
        print(received_daf_object)

        # TODO use the data from the traffic lights (self.tls)
        #  to transmit a new target velocity for this vehicle to achieve a green wave
        response_channel = self._velocity_mbs[received_daf_object.vehicle_identification_number]
        response_channel.send(randrange(0, 130))

    def handle_tl_state_receive(self, msg):
        tl_state = pickle.loads(msg)
        self.tls[tl_state['tlid']]['color'] = tl_state['color']
        print(tl_state)