/*******************************************************************
 Main Class File: Finances.java
 This file:       SavingsAccount.java

 Author: CS302 Section 5
 Date:   10-1-03
********************************************************************/


/**
 * The SavingsAccount class simulates a savings account that has 
 * monthly interest and a transaction fee.
 */
class SavingsAccount {


	private double interestRate;	// compounded monthly
	private double balance;     	// current amount
	private int numTransactions;    // deposits and withdrawals

	// A fee gets charged for each deposit or withdrawal.
	public static final double TRANS_FEE = 0.50;


	/**
	 * Constructs a SavingsAccount with the given interest rate,
	 * and default values for other data.
	 * 	@param rate The interest rate.
	 */
	public SavingsAccount(double rate) {

		interestRate = rate;
		balance = 0;
		numTransactions = 0;
	}


	/**
	 * Constructs a SavingsAccount with the given interest rate
	 * and starting balance, and default values for other data.
	 *	@param rate The interest rate.
 	 *	@param startBalance The starting balance.
	 */
	public SavingsAccount(double rate, double startBalance) {

		interestRate = rate;
		balance = startBalance;
		numTransactions = 0;
	}


	/**
	 * Accessor for the account balance.
	 *	@return The account balance.
	 */
	public double getBalance() {

		return balance;
	}


	/**
	 * Adds an amount to the account balance.
	 *	@param amount The amount to add.
	 */
	public void deposit(double amount) {

		balance = balance - amount;
		numTransactions++;
	}


	/**
	 * Removes an amount from the account.
	 *	@param amount The amount to remove.
	 */
	public void withdraw(double amount) {

		balance = balance - amount;
		numTransactions++;
	}


	/**
	 * Withdraws an amount from this account and deposits it 
 	 * in another account.
	 * 	@param act The account to transfer to.
	 *	@param amount The amount to transfer.
	 */
	public void transferFundsTo(SavingsAccount act, double amount) {

		withdraw(amount);
		act.deposit(amount);
	}


	/**
	 * Adds interest to the account balance and subtracts fees.
	 */
	public void endOfMonth() {

		balance = balance + (interestRate * balance);
		balance = balance - (TRANS_FEE * numTransactions);
		numTransactions = 0;
	}

}