Rework sim status update to not need a thread.

Rather than polling at 60Hz (which may be faster than the tick rate,
wasting cycles; and also makes synchronization annoying), collect events
during the tick and emit them after (rate limited, pooling events until
it is time for another event to send).

This can be improved by paying attention to the aircraft update list,
which would allow us to avoid updating aircraft that don't have a status
change. To do that we need to be able to quickly lookup a FlightJs
matching a Flight through, and Flight isn't hashable.

We should also be removing dead events and de-duplicating. Currently
each flight has an update for every tick, but only the latest one
matters. Combat update events also don't matter if the same combat is
new in the update.

https://github.com/dcs-liberation/dcs_liberation/issues/1680

game/sim/missionsimulation.py

@@ -9,11 +9,11 @@ from game.debriefing import Debriefing
 from game.missiongenerator import MissionGenerator
 from game.unitmap import UnitMap
 from .aircraftsimulation import AircraftSimulation
-from .gameupdatecallbacks import GameUpdateCallbacks
 from .missionresultsprocessor import MissionResultsProcessor
 
 if TYPE_CHECKING:
     from game import Game
+    from .gameupdateevents import GameUpdateEvents
 
 
 TICK = timedelta(seconds=1)
@@ -25,10 +25,10 @@ class SimulationAlreadyCompletedError(RuntimeError):
 
 
 class MissionSimulation:
-    def __init__(self, game: Game, callbacks: GameUpdateCallbacks) -> None:
+    def __init__(self, game: Game) -> None:
         self.game = game
         self.unit_map: Optional[UnitMap] = None
-        self.aircraft_simulation = AircraftSimulation(self.game, callbacks)
+        self.aircraft_simulation = AircraftSimulation(self.game)
         self.completed = False
         self.time = self.game.conditions.start_time
 
@@ -36,12 +36,13 @@ class MissionSimulation:
         self.time = self.game.conditions.start_time
         self.aircraft_simulation.begin_simulation()
 
-    def tick(self) -> bool:
+    def tick(self, events: GameUpdateEvents) -> GameUpdateEvents:
         self.time += TICK
         if self.completed:
             raise RuntimeError("Simulation already completed")
-        self.completed = self.aircraft_simulation.on_game_tick(self.time, TICK)
-        return self.completed
+        self.aircraft_simulation.on_game_tick(events, self.time, TICK)
+        self.completed = events.simulation_complete
+        return events
 
     def generate_miz(self, output: Path) -> None:
         self.unit_map = MissionGenerator(self.game, self.time).generate_miz(output)