package bank;

public class AccountImpl extends bank.AccountPOA
{
  private String _accNum;

  public AccountImpl(String accNum)
  {
    this._accNum = accNum;
  }

  public float balance()
  {
    try
    {
      return DBUtils.getBalance(_accNum);
    }
    catch(Exception e)
    {
      return (float)-1.0;
    }
  }

  public String accountNumber()
  {
    return _accNum;
  }

  public bank.AccountType accountType ()
  {
    try
    {
      return DBUtils.getAccountType(_accNum);
    }
    catch(Exception e)
    {
      return AccountType.NIL;
    }
  }

  public void deposit (float amt) throws bank.InvalidOperationException, bank.UnknownException
  {
    if(amt <= (float)0.0)
     throw new InvalidOperationException("Invalid deposit amount of " + amt + " dollars.");


    float balance = balance();
    if(balance < 0)
      throw new bank.UnknownException("Could not retrieve balance for Account " + _accNum);

    balance += amt;
    try
    {
      DBUtils.setBalance(_accNum,balance);
    }
    catch(Exception e)
    {
      throw new bank.UnknownException(e.getMessage());
    }
  }

  public void withdraw (float amt) throws bank.InvalidOperationException, bank.UnknownException
  {
    if(amt <= (float)0.0)
     throw new InvalidOperationException("Invalid withdrawal amount of " + amt + " dollars.");

    float balance = balance();
    if(balance < 0)
      throw new bank.UnknownException("Could not retrieve balance for Account " + _accNum);
    if(amt > balance)
      throw new InvalidOperationException("Cannot withdraw more than account balance.");

    balance = balance() - amt;

    // update the balance.
    try
    {
      DBUtils.setBalance(_accNum,balance);
    }
    catch(Exception e)
    {
      throw new bank.UnknownException(e.getMessage());
    }
  }
}