// Arup Guha
// Edited on 7/17/06 to use the Scanner.
import java.util.*;
public class TestBank {

    public static void main(String args[]) {

		Scanner stdin = new Scanner(System.in);

		// Initializes BankAccount reference variable.
		BankAccount b1 = null;
		menu();
		int menu_choice = stdin.nextInt();

		// Loops till user wants to quit application
		while (menu_choice != 7) {
	    
	    	// Processes user choice, note that by checking if the b1 refernce
	    	// variable is null, the user is only allowed to do options 2
	    	// through 7 if they have created a BankAccount object.
	    	if (menu_choice == 1) {
	    
				if (b1 == null)
		    		b1 = createAccount();
				else
		    		System.out.println("Sorry you have already created an account.");
	    	}
	    	else if (b1 == null)
				System.out.println("You can not attempt any operations without creating an account first.");
	    	else if (menu_choice == 2)
				deposit(b1);
	    	else if (menu_choice == 3)
				withdraw(b1);
	    	else if (menu_choice == 4)
				changeRate(b1);
	    	else if (menu_choice == 5)
				b1.matureAccount();
	    	else if (menu_choice == 6)
				b1.printInfo();
	    	else if (menu_choice != 7)
				System.out.println("Invalid choice.");

	    	menu();
	    	menu_choice = stdin.nextInt();
		}
		System.out.println("Thank you for using the banking program.");
    }

    // Prints menu of possible choices to user.
    public static void menu() {

		System.out.println("Welcome to the Banking Program.");
		System.out.println("Enter your choice, remember you can only create an account once.");
		System.out.println("1. Create an Account.");
		System.out.println("2. Deposit money.");
		System.out.println("3. Write a check.");
		System.out.println("4. Change your account interestrate.");
		System.out.println("5. Mature account one year.");
		System.out.println("6. Print out account information.");
		System.out.println("7. Quit");
    }

    // Creates a BankAccount object based on information user enters, and
    // returns a reference to this object.
    public static BankAccount createAccount() {

		Scanner stdin = new Scanner(System.in);


		System.out.println("Enter your name.");
		String name = stdin.next();
		System.out.println("Enter your initial savings deposit.");
		double save = stdin.nextDouble();
		System.out.println("Enter your initial checking deposit.");
		double check = stdin.nextDouble();
	
		// Does not create account if information is invalid.
		if (save < 0 || check < 0)
	    	System.out.println("Sorry no account created, need non-negative values in savings and checking accounts.");
		else {
	    	System.out.println("You have a new account with a 5% interest rate.");
	    	BankAccount b = new BankAccount(name,save,check,0.05);
	    	return b;
		}
		return null;
    }

    // Asks user for deposit information and executes transaction if values
    // entered are valid.
    public static void deposit(BankAccount b) {
    	
    	Scanner stdin = new Scanner(System.in);
	
		System.out.println("Enter how much you would like to deposit.");
		double money = stdin.nextDouble();
		
		if (money > 0) {
	    	System.out.println("Which account, (S)avings or (C)hecking?");
	    	char ans = stdin.next().toUpperCase().charAt(0);
	    	
	    	if (ans == 'S')
				b.deposit_sav(money);
	    	else if (ans == 'C')
				b.deposit_chk(money);
	    	else
				System.out.println("Sorry, invalid choice.");
		}
		else
	    	System.out.println("Can not deposit negative money.");
		 	    
    }

    // Asks user for withdraw amount and withdraws if sufficient funds are
    // in their Bank Account. Proper error message is printed if withdrawl is
    // not executed.
    public static void withdraw(BankAccount b) {
    	
    	Scanner stdin = new Scanner(System.in);
	
		System.out.println("Enter the amount to withdraw.");
		double money = stdin.nextDouble();
	
		if (money > 0) {
	    	if (b.noBounce(money))
				b.withdraw_chk(money);
	    	else
				System.out.println("Sorry, you do not have enough money in your checking account.");
		}
		else
	    	System.out.println("Sorry, you can not withdraw negative money.");

    }

    // Changes the interest rate of the Bank Account passed in as a parameter
    // as long as the user has sufficient funds to pay for the increased rate.
    public static void changeRate(BankAccount b) {
    	
    	Scanner stdin = new Scanner(System.in);
	
		System.out.println("Enter new interest rate.");
		System.out.println("Keep in mind that you will be charged $500 for each percentage point you raise your interest rate.");
		double rate =  stdin.nextDouble();
	
		if (rate <= b.getIrate())
	    	System.out.println("You can not decrease your interest rate.");
		else {
	    	double charge = 500 * (100 * (rate - b.getIrate()));
	    	if (b.noBounce(charge)) {
				b.changeRate(rate);
				b.withdraw_chk(charge);
	    	}
	    	else 
				System.out.println("You do not have sufficient funds to raise your rate that much.");
		}

    }
}