import java.io.*;
import java.util.Vector;
/*
    Program maintains a collection of bank account objects
    in the memory.
    The program accepts some commands to manipulate these accounts
    The vaid commands are:

    HELP
         display the list of commands the program accepts
    LIST
         displays a list of accounts with acct_no, owner and balance
    SHOW nnnn
         displays the owner and balance of the account "nnnn"
    OPEN nnnn,name surname
         opens a new account with owner "name surname" and balance=0
    DEPOSIT nnnn,aaaaaaaa
         deposits amount aaaaaaa to account nnnn
    DRAW nnnn,aaaaaaa
         draws amount aaaaaa from account "nnnn". Checks is balance allows the drawal
    CLOSE nnnn
         closes the account "nnnn" if balance is zero
    QUIT
         quits the program, all account info will be lost

*/

public class bank2 {

 public static  class account {

    // PROPERTIES
    public  String number;
    public  String owner;
    public  int    balance;

    // METHODS
    
    public int  draw(int amount) {
      balance = balance - amount;
      return balance;
    }
    
    public int  deposit(int amount) {
      balance = balance + amount;
      return balance;
    }
    
    // CONSTRUCTOR
    public account () {
      balance = 0;
      owner   = "";
      number = "";
    }
 }

 public static void main( String[] args ) throws IOException {
     
 BufferedReader input = new BufferedReader (new InputStreamReader (System.in));

     Vector accounts_vector = new Vector();

     System.out.println("Banking system ready. \nType a command or HELP to see commands");

     String command = "";
     account temp_acct;
     
     while ( ! command.startsWith("QUIT") ) {
          System.out.print("? ");
	  command = input.readLine();
	  
	  if (command.startsWith("QUIT")) {
	      System.out.println("\nSuccessful termination");
	      System.exit(0);
	  }
	  if (command.startsWith("HELP")) {
	      System.out.println("LIST lists all accounts and balances");
	      System.out.println("QUIT quits the program");
	      System.out.println("OPEN nnnnn,Owners Name");
	      System.out.println("CLOSE nnnnn");
	      System.out.println("DEPOSIT nnnnn,amount");
	      System.out.println("DRAW nnnnn,amount");
	      System.out.println("SHOW nnnnn");
	  
	  }
	  if (command.startsWith("OPEN")) {
	     String [] temp = null;
	     temp = split(command);
	     account a_new_account = new account();

	     // temp[0] is the "OPEN" command
             a_new_account.number = temp[1];
             a_new_account.owner  = temp[2];

	     accounts_vector.addElement(a_new_account);
	  }

	  if (command.startsWith("DEPOSIT")) {
	     String [] temp = null;
	     temp = split(command);

	     // temp[0] is the "DEPOSIT" command
             String number   = temp[1];
             int amount   = Integer.parseInt(temp[2]);

	     int index_of_account = findAccount(number, accounts_vector);
	     if (index_of_account == -1 ) {
	        System.out.println ("Account "+number+" not found!");
	     } else {
	        temp_acct = (account)accounts_vector.elementAt(index_of_account);
		int new_balance = temp_acct.deposit( amount );
	        System.out.println ("New balance for Account "+number+" is "+new_balance);
		accounts_vector.setElementAt(temp_acct, index_of_account);
	     }
	     
	  }

	  if (command.startsWith("LIST")) {
	     int number_of_accounts = accounts_vector.size();
	     System.out.println("Number of accounts="+number_of_accounts);
	     System.out.println("");
	     
	     for (int i=0 ; i < number_of_accounts ; i++) {
	         temp_acct =  (account)accounts_vector.elementAt( i );
	         System.out.print("Acct="+temp_acct.number);
	         System.out.print("\t"+temp_acct.owner);
	         System.out.println("\t"+temp_acct.balance);
	     }
	  }
	  
     }

 }

 public static String [] split ( String str) {
    //  Splits a BANK command into parts delimited by comma or spaces
    //  and returns in an array of strings
    //  e.g. : If argument is "OPEN 123,ABC DEF", then 
    //  the returned array will be
    //  arr[0] = "OPEN", arr[1] = "123", arr[2] = "ABC DEF"

    String [] results_array = new String[3];
    String   temp_str;
    int      array_index = 0;

    temp_str = str;

    // find the position of the first space
    int posit_space = temp_str.indexOf(' ');
    if (posit_space == -1) {   // if no spaces found, return whatever you have
       results_array[array_index] = temp_str;
       return (results_array);
    }
    results_array[array_index] = temp_str.substring(0, posit_space-1);
    array_index++;
    temp_str = temp_str.substring(posit_space+1);

    // find the position of the comma
    int posit_comma = temp_str.indexOf(',');
    if (posit_comma == -1) {
       results_array[array_index] = temp_str;
       return (results_array);
    }

    results_array[array_index] = temp_str.substring(0, posit_comma);
    array_index++;

    // get whatever is left over
    temp_str = temp_str.substring(posit_comma+1);
    results_array[array_index] = temp_str;
    return (results_array);

 }

 
 public static int findAccount ( String  acct_no, Vector accounts_vector) {
    account temp_acct;
    int n = accounts_vector.size();
    int i;
    String acct_id;
     
    for ( i=0 ; i < n ; i++) {
        temp_acct =  (account)accounts_vector.elementAt( i );
        
	acct_id = temp_acct.number;
	if ( acct_id.equals(acct_no)) {
	   // Account found, return its index in the vector
	   return i;
	}
    }
    //  Account not found
    return(-1);
 }

}