from random import randint
from abc import ABCMeta, abstractmethod

class Account(metaclass = ABCMeta):
    @abstractmethod
    def createAccount():
        return 0
    @abstractmethod
    def authenticate():
        return 0
    @abstractmethod
    def withdraw():
        return 0
    @abstractmethod
    def deposit():
        return 0
    @abstractmethod
    def displayBalance():
        return 0

class SavingsAccount(Account):
    def __init__(self):
        self.savingsAccounts= {}

    def createAccount(self, name,initialDeposit):
        print( )
        self.accountNumber = randint(10000, 99999)
        self.savingsAccounts[self.accountNumber]= [name, initialDeposit]
        print("Account creation has been succesful. Your account number is ", self.accountNumber)
        print( )
    def authenticate(self, name, accountNumber):

        if accountNumber in self.savingsAccounts.keys():
            if self.savingsAccounts[accountNumber][0] ==name:
                print("Authentication Successful")
                self.accountNumber = accountNumber
                return True
            else:
                print("Authentication Failed")
                return False
        else:
            print("Authentication Failed")
            return False
        print( )

    def withdraw(self,withdrawalAccount):
        print( )
        if withdrawalAmount > self.savingsAccounts[self.accountNumber][1]:
            print("Insufficient balance")
        else:
            self.savingsAccounts[self.accountNumber][1] -=withdrawalAmount
            print("Withdrawal was successful")
            self.displayBalance()
        print( )

    def deposit(self,depositAmount):
        self.savingsAccounts[self.accountNumber][1] +=depositAmount
        print("Deposit was successful")
        self.displayBalance()
        print( )

    def displayBalance(self):
        print("Available balance: ", self.savingsAccount[accountNumber][1])

savingsAccount = SavingsAccount()
while True:
    print( )
    print("Enter 1 to create a new account")
    print("Enter 2 to access an existing account")
    print("Enter 3 to exit")
    print( )
    userChoice = int(input())
    if userChoice == 1:
        print( )
        print("Enter your name: ")
        name = input( )
        print("Enter the initial deposit: ")
        deposit = float(input( ))
        savingsAccount.createAccount(name, deposit)
    elif userChoice ==2:
        print("Enter your name: ")
        name = input()
        print("Enter your account number: ")
        accountNumber = int(input())

        aunthentication = savingsAccount.authenticate(name, accountNumber)
        if authentication is True:
            while True:
                print("Enter 1 to withdraw")
                print("Enter 2 to deposit")
                print("Enter 3 to display available balance")
                print("Enter 4 to go back to the previous menu")
                userChoice = int(input())
                if userChoice == 1:
                    print("Enter a withdrawal amount")
                    withdrawalAmount = int(input())
                    savingsAccount.withdraw(withdrawalAmount)
                elif userChoice ==2:
                    print("Enter an amount to be deposited")
                    depositAmount = int(input())
                    savingsAccount.deposit(depositAmount)
                elif userChoice ==3:
                    savingsAccount.displayBalance( )
                elif userChoice ==4:
                    break
    elif userChoice ==3:
        quit()