More than enough time...and a text at 12 midnight with the flight details is a good representation of your future career - except in real life it'll probably be for a 9am departure.
Agree completely with Big Pistons Forever.
Like Big Piston's student I too used to go into the nth degree with planning, and I got bogged down with detail. My salvation was a small book called "Diversion Planning" by Martyn Smith, it is about flying with a map, a pencil and a stopwatch. And it works
so well. And when you see how well it works, you have the confidence in pre-flight planning to put down the CRP-5 for a wind calculation which is going to be wrong anyway - and concentrate on what matters.
For CPL test, you dont need to prepare for everything on the ground, you just need to know you can handle anything in the air, you'll be flung off on a diversion at some point anyway so you may be spending an hour planning for part of a route you'll never reach.
Go back to basics for a while - map, pencil, stopwatch.
Good luck