main.py

import json
import subprocess as sp
from time import sleep, time
with open('accounts.json') as f:
    data = json.load(f)


def clear():
    tmp = sp.call('cls', shell=True)


def new_user():
    # Taking the new users name
    new_data = {}
    name = ""
    checker_name = 0
    while checker_name != 1:
        first_name = input("Enter your First name: ")
        middile_name = input("Enter your Middle name(Leave empty if none): ")
        last_name = input("Enter your Last name: ")
        if len(middile_name) == 0:
            name = first_name+" "+last_name
        else:
            name = first_name+" "+middile_name+" "+last_name
        name_checker = list(name)
        for i in range(len(name_checker)):
            asci_val = ord(name_checker[i])
            if (asci_val <= 90 and asci_val >= 65) or (asci_val <= 122 and asci_val >= 97) or asci_val == 32:
                checker_name = 1
            else:
                checker_name = 0
                print("Invalid Input!! Enter Your name again: \n")
                break
    if checker_name == 1:
        new_data['name'] = name
    print(f"Welcome {name} to the Bank of TBC\n")
    # taking the new users pin
    checker_PIN = 0
    account_PIN_enter = 0000
    while checker_PIN != 1:
        account_PIN_enter = int(input("Enter you 4 digit PIN: "))
        account_PIN_checker = int(input("Re-enter you 4 digit PIN: "))
        if account_PIN_enter == account_PIN_checker:
            if account_PIN_enter > 999 and account_PIN_enter < 10000:
                checker_PIN = 1
            else:
                checker_PIN = 0
                print(
                    "PIN must be 4 Digit and cannot start with 0! Enter the Pin again: \n")
        else:
            checker_PIN = 0
            print("Entered PIN does not match! Enter the Pin again: \n")
    if checker_PIN == 1:
        new_data['PIN'] = account_PIN_enter

    # creating the acc number
    account_number = len(data['people'])+1
    new_data['acc_number'] = account_number
    print(f"\nYour account number is: {account_number}")

    # setting the default accont balance at 0
    account_balance = 0
    new_data['acc_balance'] = account_balance
    print(f"\nYour account balance is: {account_balance}")
    sleep(5)
    # entering the data to the json file
    data['people'].append(new_data)
    with open('accounts.json', 'w') as f:
        json.dump(data, f, indent=2)


def existing_user():
    if len(data['people']) > 0:
        num = 0
        while True:
            check_acc_num = int(input("Please enter your Account Number: "))
            for i in range(len(data['people'])):
                if check_acc_num == data['people'][i]['acc_number']:
                    num = i
                    break
            if i == len(data['people']) and check_acc_num != data['people'][i-1]['acc_number']:
                print("Invalid Account Number!!")
            if check_acc_num == data['people'][num]['acc_number']:
                break

        accountdetails = data['people'][num]
        name = accountdetails['name']
        print(f"Welcome {name}\n")

        while True:
            check_PIN_1 = int(input("Enter Your PIN : "))
            if check_PIN_1 == accountdetails['PIN']:
                check_PIN_2 = int(input("Re-enter Your PIN : "))
                if check_PIN_2 == check_PIN_1:
                    print("PIN is correct!")
                    break
                else:
                    print("The PINs do not match!")
            else:
                print("Incorrect PIN!")

        while True:
            clear()
            print(f"Welcome {name} to the Bank of TBC\n")
            choice2 = int(input(
                "\n1. View Balance\n2. Deposit\n3. Withdraw\n4. Transfer\n5. Profile\n6. Logout\n"))
            if choice2 == 1:
                clear()
                balance = accountdetails['acc_balance']
                print(f"Your Account Balance is: {balance}")
                sleep(4)

            elif choice2 == 2:
                clear()
                enter_amount = int(
                    input("Enter the amount you want to deposit: "))
                new_balance = accountdetails['acc_balance']+enter_amount
                data['people'][num]['acc_balance'] = new_balance
                with open('accounts.json', 'w') as f:
                    json.dump(data, f, indent=2)
                print(
                    f"Amount of Rs. {enter_amount} has been credited to your account!")
                print(f"Your Balance is: {new_balance}")
                sleep(3)

            elif choice2 == 3:
                while True:
                    clear()
                    enter_amount = int(
                        input("Enter the amount you want to withdraw: "))
                    if enter_amount > accountdetails['acc_balance']:
                        print("You do not have this ammount of money!")
                    else:
                        new_balance = accountdetails['acc_balance'] - \
                            enter_amount
                        data['people'][num]['acc_balance'] = new_balance
                        with open('accounts.json', 'w') as f:
                            json.dump(data, f, indent=2)
                        print(
                            f"Amount of Rs. {enter_amount} has been debited from your account!")
                        print(f"Your Balance is: {new_balance}")
                        sleep(3)
                        break

            elif choice2 == 4:
                new_num = 0
                while True:
                    clear()
                    enter_acc_num = int(
                        input("Enter the Account number of the account you want to transfer: "))
                    if enter_amount > accountdetails['acc_balance']:
                        print("You do not have this ammount of money!")
                    for i in range(len(data['people'])):
                        if enter_acc_num == data['people'][i]['acc_number']:
                            new_num = i
                            break
                    if i == len(data['people']) and enter_acc_num != data['people'][i-1]['acc_number']:
                        print("Invalid Account Number!!")
                    if enter_acc_num == data['people'][new_num]['acc_number']:
                        newaccountdetails = data['people'][new_num]
                        new_name = newaccountdetails['name']
                        check_if_name_ok = input(
                            f"Do you want to transfer to {new_name}? (Y/N)")
                        while True:
                            if check_if_name_ok == 'Y' or check_if_name_ok == 'y':
                                amount = int(
                                    input("Enter the amount that you want to transfer: "))
                                other_person_new_balance = newaccountdetails['acc_balance']+amount
                                own_new_balance = accountdetails['acc_balance']-amount
                                data['people'][num]['acc_balance'] = own_new_balance
                                data['people'][new_num]['acc_balance'] = other_person_new_balance
                                with open('accounts.json', 'w') as f:
                                    json.dump(data, f, indent=2)
                                print("Transfer Complete")
                                sleep(3)
                                break
                            elif check_if_name_ok == 'N' or check_if_name_ok == 'n':
                                break
                            else:
                                print("Invalid Input Enter 'Y' or 'N'")
                        break
            elif choice2 == 6:
                break

            elif choice2 == 5:
                while True:
                    clear()
                    name = accountdetails['name']
                    pin = accountdetails['PIN']
                    balance = accountdetails['acc_balance']
                    acc_num = accountdetails['acc_number']
                    print(
                        f"Account Holder Name: {name}\nAccount Number: {acc_num}\nPIN: {pin}\nAccount Balance: {balance}\n")
                    choice3 = int(
                        input("\n\n1. Change PIN\n2. Go back to Account Menu\n3. Delete Account\n"))
                    if choice3 == 2:
                        break
                    elif choice3 == 1:
                        while True:
                            clear()
                            curr_PIN = int(input("Enter your Current PIN: "))
                            if curr_PIN == accountdetails['PIN']:
                                new_PIN = int(input("Enter your New PIN: "))
                                if new_PIN > 999 and new_PIN < 10000:
                                    data['people'][num]['PIN'] = new_PIN
                                    with open('accounts.json', 'w') as f:
                                        json.dump(data, f, indent=2)
                                    print(
                                        f"PIN changed Sucessfully!\nYour new PIN is: {new_PIN}")
                                    sleep(3)
                                    break
                                else:
                                    print(
                                        "PIN must be 4 Digit and cannot start with 0!\n")
                            else:
                                print("Incorrect PIN!")
                    elif choice3 == 3:
                        confirm = input(
                            "Are you sure you want to delete your account!!(Y/N)? ")
                        if confirm == 'Y' or confirm == 'y':
                            while True:
                                check_PIN_1 = int(input("Enter Your PIN : "))
                                if check_PIN_1 == accountdetails['PIN']:
                                    check_PIN_2 = int(
                                        input("Re-enter Your PIN : "))
                                    if check_PIN_2 == check_PIN_1:
                                        data['people'].pop(num)
                                        with open('accounts.json', 'w') as f:
                                            json.dump(data, f, indent=2)
                                        print(
                                            "Account Sucessfully Deleted! and your money is gone forever!!")
                                        sleep(3)
                                        break
                                    else:
                                        print("The PINs do not match!")
                                else:
                                    print("Incorrect PIN!")
                        break

    else:
        print("There are no accounts in this bank!")


def about():
    print('''\n==========ABOUT US==========
        This project has been created by Aman Khadka.
        It is a basic Python Project for my 1st Semester.''')


def developer_mode():
    print(data)
    sleep(10)


# main
while True:
    print("Welcome to the Bank of TBC\n")
    choice1 = int(input("1. Sign up\n2. Login\n3. About\n4. Exit\n"))
    if choice1 == 1:
        clear()
        new_user()
    elif choice1 == 2:
        clear()
        existing_user()
    elif choice1 == 3:
        about()
    elif choice1 == 5:
        clear()
        developer_mode()
    elif choice1 == 4:
        break