#!/usr/bin/env python3
import json
import random
import unittest
import time
import capnp

import cereal.messaging as messaging
from cereal.services import service_list
from common.params import Params

from selfdrive.manager.process_config import managed_processes


class TestLocationdProc(unittest.TestCase):
  MAX_WAITS = 1000
  LLD_MSGS = ['gpsLocationExternal', 'cameraOdometry', 'carState', 'sensorEvents', 'liveCalibration']

  def setUp(self):
    random.seed(123489234)

    self.pm = messaging.PubMaster(self.LLD_MSGS)

    managed_processes['locationd'].prepare()
    managed_processes['locationd'].start()

    time.sleep(1)

  def tearDown(self):
    managed_processes['locationd'].stop()

  def send_msg(self, msg):
    self.pm.send(msg.which(), msg)
    waits_left = self.MAX_WAITS
    while waits_left and not self.pm.all_readers_updated(msg.which()):
      time.sleep(0)
      waits_left -= 1
    time.sleep(0.0001)

  def get_fake_msg(self, name, t):
    try:
      msg = messaging.new_message(name)
    except capnp.lib.capnp.KjException:
      msg = messaging.new_message(name, 0)

    if name == "gpsLocationExternal":
      msg.gpsLocationExternal.flags = 1
      msg.gpsLocationExternal.verticalAccuracy = 1.0
      msg.gpsLocationExternal.speedAccuracy = 1.0
      msg.gpsLocationExternal.bearingAccuracyDeg = 1.0
      msg.gpsLocationExternal.vNED = [0.0, 0.0, 0.0]
      msg.gpsLocationExternal.latitude = self.lat
      msg.gpsLocationExternal.longitude = self.lon
      msg.gpsLocationExternal.altitude = self.alt
    elif name == 'cameraOdometry':
      msg.cameraOdometry.rot = [0.0, 0.0, 0.0]
      msg.cameraOdometry.rotStd = [0.0, 0.0, 0.0]
      msg.cameraOdometry.trans = [0.0, 0.0, 0.0]
      msg.cameraOdometry.transStd = [0.0, 0.0, 0.0]
    msg.logMonoTime = t
    return msg

  def test_params_gps(self):
    # first reset params
    Params().delete('LastGPSPosition')

    self.lat = 30 + (random.random() * 10.0)
    self.lon = -70 + (random.random() * 10.0)
    self.alt = 5 + (random.random() * 10.0)
    self.fake_duration = 90  # secs
    # get fake messages at the correct frequency, listed in services.py
    fake_msgs = []
    for sec in range(self.fake_duration):
      for name in self.LLD_MSGS:
        for j in range(int(service_list[name].frequency)):
          fake_msgs.append(self.get_fake_msg(name, int((sec + j / service_list[name].frequency) * 1e9)))

    for fake_msg in sorted(fake_msgs, key=lambda x: x.logMonoTime):
      self.send_msg(fake_msg)
    time.sleep(1)  # wait for async params write

    lastGPS = json.loads(Params().get('LastGPSPosition'))

    self.assertAlmostEqual(lastGPS['latitude'], self.lat, places=3)
    self.assertAlmostEqual(lastGPS['longitude'], self.lon, places=3)
    self.assertAlmostEqual(lastGPS['altitude'], self.alt, places=3)


if __name__ == "__main__":
  unittest.main()