awful play by villian. first, he doesnt raise pre with the ace. not a fan of the flop call neither, you bet full pot in a limped pot, which doesnt make a lot of sense in general, but espacially not with air or a draw, villian doesnt need to get involved with A high in a limped pot with 50bb. but he calls, so he put you on air or a draw, or if he is feeling adventerous he might try to get you off a 5 or a 3. in all these cases, raising the turn makes absolutly 0 sense. i can only imagine he put you on a draw, hoped it was not the 2 4, which wouldve hit the straight and tried to make you pay to see the river, but the chances you have exactly 4 6 or 6 7 are obviously too low to even think about that move.