package lab5;

import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.Scanner;

/**
   This program demonstrates random access. You can access existing
   accounts and deposit money, or create new accounts. The
   accounts are saved in a random access file.
*/
public class BankSimulator
{
   public static void main(String[] args) throws IOException
   {
      Scanner in = new Scanner(System.in);
      BankData data = new BankData();
      try
      {
         data.open("bank.dat");

         boolean done = false;
         while (!done)
         {
            System.out.print("Account number (negative number to delete account): ");
            int accountNumber = in.nextInt();
            int position = data.find(Math.abs(accountNumber));
            BankAccount account = null;
            double amount = 0;
            if (accountNumber > 0)
            {
               System.out.print("Amount to deposit: ");
               amount = in.nextDouble();
            }
            if (accountNumber != 0 && position >= 0)
            {
               if (accountNumber > 0)
               {
                  account = data.read(position);
                  account.deposit(amount);
                  data.write(position, account);
                  System.out.println("New balance: "
                     + account.getBalance());
               }
               else
               {
                  data.delete(position);
                  System.out.println("Account deleted.");
               }
            }
            else if (accountNumber > 0) // Add account
            {
               account = new BankAccount(accountNumber,
                     amount);
               position = data.size();
               data.write(position, account);
               System.out.println("Adding new account.");
            }
            else
               System.out.println("No such account.");

            System.out.print("Done? (Y/N) ");
            String input = in.next();
            if (input.equalsIgnoreCase("Y")) done = true;
         }
      }
      finally
      {
         data.close();
      }
   }
}