Using current Git master and want to send all coins from a wallet to another one.

• try to send 0.0128772 BTC
• message that a Tx fee of 0.001 BTC is needed, so I can't send
• try to send 0.0113772 BTC (All coins - Tx fee of 0.001 BTC)
• message that Tx is over size and I need a Tx fee of 0.0005

Is there a way to get the final Tx fee sum in one info message?