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# """

# Basic Object-Oriented Programming scenario of a bank

# """

import uuid

from dataclasses import dataclass, field

from time import sleep

from typing import Dict, Tuple, Callable, ClassVar

class Menu:

MENU: ClassVar[Tuple[Tuple[str, Callable[['Menu'], bool]], ...]]

"""

example = (('Exit', exit),

('Create an account', create_account),

('Log into an account', log_in),

)

"""

def screen(self):

prompt = '\n'.join(f'{i}. {name}' for i, (name, func) in enumerate(self.MENU)) + '\n'

while True:

choice = input(prompt)

try:

name, func = self.MENU[int(choice)]

except ValueError:

print('Invalid integer entered')

except IndexError:

print('Choice out of range')

else:

if func(self):

break

@dataclass(kw_only=True)

class Account(Menu):

email: str

pwd: str

@classmethod

def acct_details(cls):

# Needs to return tuple

cls.email = input('Email Address: ')

cls.pwd = input('Password: ')

@dataclass(kw_only=True)

class BankDetails(Account):

acct: str | None

card: str | None

pin: str | None

@staticmethod

def _generate_acct_number() -> str:

acct_number = str(uuid.uuid4().int)[:8]

return acct_number

@staticmethod

def _generate_card_number() -> str:

card_number = f'4000{str(uuid.uuid4().int)[:12]}'

return card_number

@staticmethod

def _generate_pin() -> str:

pin_number = str(uuid.uuid4().int)[:4]

return pin_number

@classmethod

def generate(cls) -> 'BankDetails':

return cls(

email=cls.email,

pwd=cls.pwd,

acct=cls._generate_acct_number(),

card=cls._generate_card_number(),

pin=cls._generate_pin()

)

def show_details(self):

print("\n"

f"Your username: {self.email}\n"

f"Your account number: {self.acct}\n"

f"Your card number: {self.card}\n"

f"Your PIN: {self.pin}\n",

)

@dataclass(kw_only=True)

class Balance(BankDetails):

balance: float = 0.00

def print_balance(self):

print(f'Balance: £{self.balance}')

def deposit(self):

amount = float(input('How much would you like to deposit? '))

if amount < 0:

print('Deposits can not be negative')

else:

self.balance += amount

print(f'Balance: ${self.balance}')

def withdraw(self):

amount = float(input('How much would you like to withdraw? '))

if amount > self.balance:

print("You do not have enough funds")

print(f'Balance: ${self.balance}')

else:

self.balance -= amount

print(f'Balance: £{self.balance}')

def logout(self) -> bool:

print('You have successfully logged out!')

return True

def exit(self):

print('Bye!')

exit()

MENU = (

('Exit', exit),

('Balance', print_balance),

('Deposit', deposit),

('Withdraw', withdraw),

('Log out', logout),

)

@dataclass(kw_only=True)

class BankingSystem(Menu):

# def __init__(self):

# self.accounts: Dict[str, Account] = dict()

accounts: Dict[str, Account] = field(default_factory=dict)

def create_account(self):

print('Please enter a valid email address and password')

Account.acct_details()

if Account.email:

account = Balance.generate()

print('Your account has been created')

account.show_details()

self.accounts[account.card] = account

def log_in(self):

for _ in range(3):

email = input('Enter your Email Address: ')

if email != Account.email:

print('Wrong email address')

break

pwd = input('Enter your Password: ')

if pwd != Account.pwd:

print('Wrong Password')

sleep(2)

break

else:

print('You have successfully logged in!')

bank = list(self.accounts.values())[0]

bank.screen()

break

def exit(self) -> bool:

print('Bye!')

return True

MENU = (

('Exit', exit),

('Create an account', create_account),

('Log into an account', log_in),

)

BankingSystem().screen()