// Bank.java

/**
 * Bank represents a single Bank containing a number of BankAccounts.
 */
public class Bank {

	// Member variables:
	
	/** The array of BankAccount objects contained in this bank. */
	private BankAccount[] myAccounts = new BankAccount[ 2000];
	
	/** The number of BankAccount objects stored in the array in this bank. */
	private int numberOfAccounts = 0;
	
	
	// Constructors:
	
	/**
	 * Creates a Bank.
	 */
	public Bank() {}
	
	
	// Methods:
	
	/** 
	 * Creates an account with the name and balance, and adds it to 
	 * the bank's list of accounts.
	 * If the name already exists, no account will be created.
	 * @param aName The name for the new account.
	 * @param aBalance The initial balance for the new account.
	 */
	public void createAccount( String aName, double aBalance) {
		BankAccount existing = this.findAccount( aName);
		if( existing != null) return;
		BankAccount anAccount = new BankAccount( aName, aBalance);
		this.myAccounts[ numberOfAccounts] = anAccount;
		this.numberOfAccounts++;
	}
	
	/** 
	 * Finds an account in the bank's list of accounts by name.
	 * If no account is found, this method returns null.
	 * @param aName The name of the BankAccount to search for.
	 * @return The BankAccount bearing the given name, if found.
	 */
	public BankAccount findAccount( String aName) {
		if( aName == null) return( null);
		for( int index = 0; index < numberOfAccounts; index++) {
			BankAccount anAccount = this.myAccounts[ index];
			if( aName.equals( anAccount.getName())) {
				return( anAccount);
			}
		}
		return( null);
	}
	
	/**
	 * Gives a total of all the BankAccounts in the bank.
	 * @return The sum of all the deposits in the Bank's BankAccounts
	 */
	public double totalInBank() {
	    double total = 0.0;
	    for( int index = 0; index < numberOfAccounts; index++) {
			BankAccount anAccount = this.myAccounts[ index];
			total += anAccount.getBalance();
		}
	    return( total);
	}
	        
	/** 
	 * Returns a String which represents a short summary of 
	 * all the accounts in the bank.
	 */
	public String getSummaryString() {
		String answer = "";
		for( int index = 0; index < numberOfAccounts; index++) {
			BankAccount anAccount = this.myAccounts[ index];
			answer += anAccount.getName() + "  " + anAccount.getBalance() + "\n";
		}
		return( answer);
	}

}