# Python Program
# Lucas, Ben Jeztan L.
# CC2 (Introdution to Computer Programming)
# CITCS 1J (Group B)


# Use import command to allow the loading function
import time as t

# User balance
user_balance = 100

# Greeting
print("Welcome to the app of Infinite Money Bank")

# Instruction
print("Please type in the command of your chosen transaction below [1-4]")

# Using loop for all data here
while (True):
    
    # Choices
    # Using \t program language to indent the choices
    # Use print() program language to provide line spaces
    print()
    print("\t\t[11. View Account Balance")
    print("\t\t[2]. Withdraw Cash")
    print("\t\t[3]. Deposit Cash")
    print("\t\t[4]. Exit Application")
    print()
    
    # Providing input for the command
    choice = int(input("Please enter the command to proceed: "))
    
    # Command 1 system          
    if choice == 1:
        print("Loading Account Balance...")
        
        # Using sleep command and importing time as t
        # Loading time: 1 seconds
        t.sleep(1)
        print("Your current balance is:", user_balance, "PHP")
    
    # Command 2 system
    elif choice == 2:
        print("Opening Cash Withdrawal...")
        t.sleep(1)
        
        while True:
            
            # Using try, except, else command
            try:
                withdraw_amt = float(input("Enter the amount you wish to withdraw: "))

            except ValueError:
                print("Error! Please enter a valid number.")
                continue
                
            else:
                
                if withdraw_amt > user_balance:
                    print("You can't withdraw! Withdrawal amount must not exceed to your current balance.")
                    print("Please enter a lower amount!")
                    continue

                else:
                    print("Withdrawing", withdraw_amt, "PHP...")
                    decision = input("Are you sure? Yes/No?: ")
                
                    if decision in ("Yes", "yes"):
                        user_balance -= withdraw_amt
                        print("Amount withdrawn!")
                        print("Your remaining balance is:", user_balance, "PHP")

                    elif decision in ("No", "no"):
                        print("Cancelling transaction...")
                        t.sleep(1)
                        print("Transaction Cancelled!")
                        continue
                    
                    else:
                        print("Invalid input! Please enter YES or NO only.")
                        continue
                    
            break
    
    # Command 3 system
    elif choice == 3:
        print("Loading Cash Deposit...")
        t.sleep(1)

        while True:
            
            try:
                deposit_amt = float(input("Please enter the amount you wish to deposit: "))
                
            except ValueError:
                print("Error! Please enter a valid number.")
                continue
                
            else:
                
                if deposit_amt > 1000:
                    print("Deposit amount should be less that 1000 PHP!")
                    continue
                
                else:
                    print("Depositing", deposit_amt, "PHP...")
                    confirm = input("Are you sure? Yes/No: ")
        
                    if confirm in ("Yes", "yes"): 
                        user_balance += deposit_amt
                        print("Amount deposited!")
                        print("Updated balance", user_balance, "PHP")
            
                    elif confirm in ("No", "no"):
                        print("Cancelling transaction...")
                        t.sleep(1)
                        print("Transaction Cancelled!")
                        continue
        
                    else:
                        print("Invalid input! You must choose YES or NO only.")
                        continue
            
            break
    
    # Command 4 system   
    elif choice == 4:
        print("Exiting...")
        t.sleep(1)
        print("Thank you for using our app. Have a nice day!")
        
        # Ending the whole loop and exits the app
        break
    
    # Provide warnings if entered a wrong command
    else:
        print("Invalid command! Please choose 1, 2, 3, 4 command only.")