Adam and Eve for that matter would have had no concept of a thousand years being one day ,so they would have in all probability believed what we understand a day meaning.
A thousand years being a day in Gods sight wasn`t brought out till thousands of years later .
So as far as Adam and Eve were concerned God deceived them and the snake satan told the truth.
Simply because they didn`t die in what they would have understood a day to be.
Also Satan / snake told the truth when he said their eyes would be opened knowing good and bad and in that sense being like God.
I think Jehovah god is the bad guy here and Satan has been given a raw deal.