import java.util.*;

public class BankService
{
	BankAccount account = null;
	
	public BankService(BankAccount theAccount)
	{
		account = theAccount; //setting the account
		 	
	}
	public String doService(String answer)
	{
		Bank bank = Bank.getInstance();
		
		 /*  when the user enters the command depsoit <accountnumber> <amount>
    	 *	this will deposit the specified <amount> into the accountnumber they
    	 *	want
    	 */
    	 
		if(answer.indexOf("deposit") >=0)
		{
			StringTokenizer token =  new StringTokenizer(answer);
			token.nextToken();
			String accNumber = token.nextToken();
			int num = Integer.parseInt( accNumber );
			check = bank.getAccountByNumber(num);
				if(check==null)
				{
					System.out.println("You have entered an invalid account number");
				}
				
				else
				{
					    String number = token.nextToken();
						int depNum = Integer.parseInt( number );
						check.deposit(depNum);				
				}
			answer = "" + num;
       		
    	}
    	
    	/*  when the user enters the command withdraw <accountnumber> <amount>
    	 *	this will withdraw the specified <amount> from the accountnumber they
    	 *	want
    	 */
    		
		else if (answer.indexOf("withdraw")>=0)
		{
			StringTokenizer token =  new StringTokenizer(answer);
			token.nextToken();
			String accNumber = token.nextToken();
			int num = Integer.parseInt( accNumber );
			check = bank.getAccountByNumber(num);
				if (check==null)
				{
					System.out.println("You have entered an invalid account number");
				}
				else 
				{
					String number = token.nextToken();
					int withNum = Integer.parseInt( number);
					check.withdraw(withNum);
				}
			answer = "" + num;	
		}
		else if (answer.indexOf("balance")>=0)
		{
			//is this actually returning the balance of the number the enter?
			
			StringTokenizer token =  new StringTokenizer(answer);
			token.nextToken();
			String accNumber = token.nextToken();
			int num = Integer.parseInt( accNumber );
			check = bank.getAccountByNumber(num);
				if (check==null)
				{
					System.out.println("You have entered an invalid account number");
				}
				else
				{
					String number = token.nextToken();
					int balNum = Integer.parseInt( number );
					System.out.println("Your balance is : " + check.getBalance());
				}
			
		}
		else //if the command entered is invalid return this
		{
			answer = "Sorry, I don't understand this request.";
		}
		return answer;
		
	}
	

}