from random import randint

class Singleton :
  Instance = None
  __isInstanced = False

  def __init__(self) :
    if Singleton.__isInstanced :
      raise Exception("Instance already exists")

    Singleton.Instance = self
    Singleton.__isInstanced = True

  def __del__(self) :
    Singleton.Instance = None
    Singleton.__isInstanced = False

class Math :
  def clamp(num, min_value, max_value):
    return max(min(num, max_value), min_value)



class Car :
  def __init__(self, name, max_speed, drag_coef, time_to_max) :
    self.name = name
    self.max_speed = max(0, max_speed)
    self.drag_coef = Math.clamp(drag_coef, float(0), float(1))
    self.time_to_max = max(0, time_to_max)


  def printInfo(self) :
    print("Name : " + self.name, end = ", ")
    print("Max Speed : " + str(self.max_speed), end = ", ")
    print("Drag Coef : " + str(self.drag_coef), end = ", ")
    print("Time To Max : " + str(self.time_to_max))

class Weather :

  def __init__(self, wind_speed) :
    self.wind_speed = max(0, wind_speed)

class Competition (Singleton) :

  def __init__(self, distance, weather) :
    super().__init__()
    self.updateData(distance, weather)

  def updateData(self, distance, weather) :
    self.distance = distance
    self.weather = weather

  def start(self, *competitors) :
    for car in competitors:

        competitor_time = 0
        competitor_speed = 0

        for distance in range(self.distance):
            _wind_speed = randint(0, self.weather.wind_speed)

            if competitor_time == 0 :
                competitor_speed = 1
            else :
                competitor_speed = (competitor_time / car.time_to_max) * car.max_speed
                if competitor_speed > self.weather.wind_speed:
                    competitor_speed -= (car.drag_coef * _wind_speed)

            competitor_time += float(1) / competitor_speed

        print("Car <%s> result: %f" % (car.name, competitor_time))

  def __del__(self) :
    super().__del__()

ferrary = Car('ferrary', 340, 0.324,26)
bugatti = Car('bugatti', 407, 0.39, 32)
toyota = Car('toyota', 180, 0.25, 40)
lada = Car('lada', 180, 0.32, 56)
sx4 = Car('sx4', 180, 0.33, 44)

weather = Weather(20)
comp = Competition(10000, weather)

comp.start(ferrary, bugatti, toyota, lada, sx4)