main.py

import json

import datetime

# load account if exists

def load_account():

 try:

 with open("account.json", "r") as f:

 account = json.load(f)

 return account

 except FileNotFoundError:

 return -1

# create new account

def create_account():

 account = {

 "balance": 0.0,

 "transactions": []

 }

 with open("account.json", "w") as f:

 json.dump(account, f)

 return account

# save account state

def save_account(account):

 with open("account.json", "w") as f:

 json.dump(account, f)

# deposit function

def deposit(account, amount):

 account["balance"] += amount

 account["transactions"].append({

 "transaction_id": transaction_id_generator(len(account["transactions"])+1),

 "type": "deposit",

 "amount": amount,

 "date": str(datetime.datetime.now()),

 "balance_after": account["balance"]

 })

 save_account(account)

# Generate a unique 10-digit transaction ID

def transaction_id_generator(number):

 return str(number).zfill(10)

# withdraw function

def withdraw(account, amount):

 account["balance"] -= amount

 account["transactions"].append({

 "transaction_id": transaction_id_generator(len(account["transactions"])+1),

 "type": "withdraw",

 "amount": amount,

 "date": str(datetime.datetime.now()),

 "balance_after": account["balance"]

 })

 save_account(account)

# check balance function

def check_balance(account):

 return account["balance"]

# view transactions function

def view_transactions(account):

 if len(account["transactions"]) == 0:

 return -1

 else:

 return account["transactions"]

# search transaction by ID function

def search_transaction_by_id(account, transaction_id):

 for i in account["transactions"]:

 if i["transaction_id"] == transaction_id:

 return i

 return -1

# search transaction by amount function

def search_transaction_by_amount(account, amount):

 results = []

 for i in account["transactions"]:

 if i["amount"] == amount:

 results.append(i)

 if len(results) == 0:

 return -1

 else:

 return results

# search transaction by date function

def search_transaction_by_date(account, date):

 results = []

 for i in account["transactions"]:

 if date in i["date"]:

 results.append(i)

 if len(results) == 0:

 return -1

 else:

 return results

# main program

def main():

 # load or create account

 account = load_account()

 if account == -1:

 account = create_account()

 

 program_state = True

 while program_state:

 # main menu input

 while True:

 try:

 print("\nInput option:\n1. Deposit\n2. Withdraw\n3. Check Balance\n4. View Transactions\n5. Search Transaction\n6. Exit")

 choice = int(input("Enter choice (1-6): "))

 if choice >= 1 and choice <= 6:

 break

 else:

 print("Invalid choice. Please enter a number between 1 and 6.")

 except ValueError:

 print("Invalid input. Please enter a number between 1 and 6.")

 # carry out the chosen operations with:

 # 1. input with exception handling

 # 2. perform operation

 # 3. display result with formatting

 # options:

 # 1. deposit

 if choice == 1:

 while True:

 try:

 amount = float(input("Enter amount to deposit: "))

 if amount > 0:

 deposit(account, amount)

 print(f"Deposited: ${amount:.2f}")

 break

 else:

 print("Amount must be positive.")

 except ValueError:

 print("Invalid input. Please enter a valid amount.")

 

 # 2. withdraw

 elif choice == 2:

 if account["balance"] <= 0:

 print("Insufficient balance to withdraw.")

 else:

 while True:

 try:

 amount = float(input("Enter amount to withdraw: "))

 if amount > 0 and amount <= account["balance"]:

 withdraw(account, amount)

 print(f"Withdrew: ${amount:.2f}")

 break

 else:

 print("Invalid amount. Please enter a positive amount not exceeding your balance.")

 except ValueError:

 print("Invalid input. Please enter a valid amount.")

 

 # 3. check balance

 elif choice == 3:

 balance = check_balance(account)

 print(f"Current Balance: ${balance:.2f}")

 

 # 4. view transactions

 elif choice == 4:

 transactions = view_transactions(account)

 if transactions == -1:

 print("Record is empty.")

 else:

 print("Transaction History:")

 for i in transactions:

 print(f"ID: {i['transaction_id']} | Type: {i['type']} | Amount: ${i['amount']:.2f} | Date: {i['date']} | Balance After: ${i['balance_after']:.2f}")

 elif choice == 5:

 # search transaction submenu

 while True:

 try:

 print("Search options:\n1. By Transaction ID\n2. By Amount\n3. By Date\n4. Back to Main Menu")

 search_choice = int(input("Enter choice (1-4): "))

 if search_choice >= 1 and search_choice <= 4:

 break

 else:

 print("Invalid choice. Please enter a number between 1 and 4.")

 except ValueError:

 print("Invalid input. Please enter a number between 1 and 4.")

 

 # 1. search by transaction ID

 if search_choice == 1:

 # validate id input

 while True:

 try:

 search_id = input("Enter Transaction ID to search: ")

 if len(search_id) == 10 and search_id.isdigit():

 break

 else:

 print("Invalid Transaction ID. It must be a 10-digit number.") 

 except ValueError:

 print("Invalid Transaction ID. It must be a 10-digit number.")

 # perform search

 result = search_transaction_by_id(account, search_id)

 if result == -1:

 print("Transaction not found.")

 else:

 print("Transaction Found:")

 print(f"ID: {result['transaction_id']} | Type: {result['type']} | Amount: ${result['amount']:.2f} | Date: {result['date']} | Balance After: ${result['balance_after']:.2f}")

 

 # 2. search by amount

 elif search_choice == 2:

 # validate amount input

 while True:

 try:

 search_amount = float(input("Enter Amount to search: "))

 if search_amount > 0:

 break

 else:

 print("Amount must be positive.")

 except ValueError:

 print("Invalid input. Please enter a valid amount.")

 # perform search

 results = search_transaction_by_amount(account, search_amount)

 if results == -1:

 print("No transactions found with specified amount.")

 else:

 print("Transactions Found:")

 for i in results:

 print(f"ID: {i['transaction_id']} | Type: {i['type']} | Amount: ${i['amount']:.2f} | Date: {i['date']} | Balance After: ${i['balance_after']:.2f}")

 

 # 3. search by date

 elif search_choice == 3:

 # validate date input

 while True:

 try:

 search_year = input("Enter Year (YYYY) to search: ")

 search_month = input("Enter Month (MM) to search: ")

 search_day = input("Enter Day (DD) to search: ")

 if (len(search_year) == 4 and search_year.isdigit() and

 len(search_month) == 2 and search_month.isdigit() and

 len(search_day) == 2 and search_day.isdigit()):

 search_date = f"{search_year}-{search_month}-{search_day}"

 break

 else:

 print("Invalid date format. Please enter valid year, month, and day.")

 except ValueError:

 print("Invalid date format. Please enter valid year, month, and day.")

 

 # perform search

 results = search_transaction_by_date(account, search_date)

 if results == -1:

 print("No transactions found on the specified date.")

 else:

 print("Transactions Found:")

 for i in results:

 print(f"ID: {i['transaction_id']} | Type: {i['type']} | Amount: ${i['amount']:.2f} | Date: {i['date']} | Balance After: ${i['balance_after']:.2f}")

 

 # 4. back to main menu

 elif search_choice == 4:

 main()

 

 # 6. exit

 elif choice == 6:

 program_state = False

# run main program

main()

exit()