Attempt to reset the simulation on abort.

This is optional because I really don't know if I trust it. I don't see
much wrong with it (aside from the warning about not using it with auto-
resolve, because it won't restore lost aircraft), but it's really not
something I'd built for since it's not going to be possible as the RTS
features grow.

Fixes https://github.com/dcs-liberation/dcs_liberation/issues/2735.

game/settings/settings.py

@@ -324,6 +324,19 @@ class Settings:
             "modifications."
         ),
     )
+    reset_simulation_on_abort: bool = boolean_option(
+        "Reset mission to pre-take off conditions on abort (experimental)",
+        page=MISSION_GENERATOR_PAGE,
+        section=GAMEPLAY_SECTION,
+        default=False,
+        detail=(
+            "If enabled, the fast-forward effects will be rewound when aborting take "
+            "off. <strong>DO NOT USE THIS WITH AUTO-RESOLVE ENABLED.</strong> Lost "
+            "aircraft will not be recovered. This option is experimental and may not "
+            "work. It is always safer to reload your save after abort when using fast-"
+            "forward."
+        ),
+    )
     player_mission_interrupts_sim_at: Optional[StartType] = choices_option(
         "Player missions interrupt fast forward",
         page=MISSION_GENERATOR_PAGE,

game/sim/aircraftsimulation.py

@@ -11,12 +11,12 @@ from game.ato.flightstate import (
     Uninitialized,
 )
 from .combat import CombatInitiator, FrozenCombat
+from .gameupdateevents import GameUpdateEvents
 from .simulationresults import SimulationResults
 
 if TYPE_CHECKING:
     from game import Game
     from game.ato import Flight
-    from .gameupdateevents import GameUpdateEvents
 
 
 class AircraftSimulation:
@@ -69,9 +69,13 @@ class AircraftSimulation:
         for flight in self.iter_flights():
             flight.state.reinitialize(now)
 
-    def reset(self) -> None:
+    def reset(self, events: GameUpdateEvents | None = None) -> None:
+        if events is None:
+            events = GameUpdateEvents()
         for flight in self.iter_flights():
             flight.set_state(Uninitialized(flight, self.game.settings))
+            events.update_flight(flight)
+        self.combats = []
 
     def iter_flights(self) -> Iterator[Flight]:
         packages = itertools.chain(

game/sim/gameloop.py

@@ -36,6 +36,14 @@ class GameLoop:
     def elapsed_time(self) -> timedelta:
         return self.sim.time - self.game.conditions.start_time
 
+    def reset(self) -> None:
+        self.pause()
+        self.events = GameUpdateEvents()
+        self.sim.reset(self.events)
+        self.send_update(rate_limit=False)
+        self.started = False
+        self.completed = False
+
     def start(self) -> None:
         if self.started:
             raise RuntimeError("Cannot start game loop because it has already started")

game/sim/missionsimulation.py

@@ -33,6 +33,11 @@ class MissionSimulation:
         self.completed = False
         self.time = self.game.conditions.start_time
 
+    def reset(self, events: GameUpdateEvents) -> None:
+        self.completed = False
+        self.time = self.game.conditions.start_time
+        self.aircraft_simulation.reset(events)
+
     def begin_simulation(self) -> None:
         self.time = self.game.conditions.start_time
         self.aircraft_simulation.begin_simulation()