I know that FDR did much too withhold America from being involved in WWII but being a realist he also knew it was futile unless a miracle occurred.
The designs of the Axis would be too dominate the world.
I have found no evidence from my own research that FDR or any knew the specifics of such attack though information concerning the immanence of an attack was well circulated.
Many thought the philippines would be the source of a first attack, and, this was a more logical thought.
I know that there is much information presented about intercepts of Japanese messages but no information that would show any conspiracy on the part of FDR. It was like 9-11, there was enough information to raise concern but not specific as to location or timing.
I could be wrong, however; at this late date the barn door has been closed and the results of any information to the contrary is moot.
Blessings