from random import randrange, seed

from datetime import datetime

from abc import ABC, abstractmethod

class Person(ABC):

def __init__(self, full_name, salary):

self.full_name = full_name

self.salary = salary

self.served_cnt = 0

def report(self):

print(self.full_name + " served " + str(self.served_cnt) + " customers.")

class Waiter(Person):

def __init__(self, full_name, salary):

Person.__init__(self, full_name, salary)

def serve(self, customers, barista):

self.served_cnt += customers

print("Waiter " + self.full_name + " served " + str(customers) + " customers")

barista.prepare(customers)

class Barista(Person):

def __init__(self, full_name, salary):

Person.__init__(self, full_name, salary)

def prepare(self, customers):

print("Barista " + self.full_name + " served " + str(customers) + " customers")

self.served_cnt += customers

class Owner(Waiter, Barista):

def __init__(self, full_name, salary):

Person.__init__(self, full_name, salary)

def main():

seed(datetime.now())

o = Owner("owner", 100000)

w1 = Waiter("waiter-1", 200000)

w2 = Waiter("waiter-1", 200000)

b = Barista("barista", 300000)

waiters = [o, w1, w2]

baristas = [o, b]

for _ in range(10):

waiters[randrange(3)].serve(randrange(1,5+1), baristas[randrange(2)])

print("")

o.report()

w1.report()

w2.report()

b.report()

main()