Stagger package start times.

Avoids crowding the taxiways, and adds some life to the end of the
mission.

Later on, this will happen more naturally because we can delay
takeoffs to align with the package's DTOT.

gen/ato.py

@@ -40,6 +40,8 @@ class Package:
     #: The set of flights in the package.
     flights: List[Flight] = field(default_factory=list)
 
+    delay: int = field(default=0)
+
     join_point: Optional[Point] = field(default=None, init=False, hash=False)
     split_point: Optional[Point] = field(default=None, init=False, hash=False)
     ingress_point: Optional[Point] = field(default=None, init=False, hash=False)

gen/flights/ai_flight_planner.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import logging
+import random
 import operator
 from dataclasses import dataclass
 from typing import Iterator, List, Optional, Set, TYPE_CHECKING, Tuple, Type
@@ -384,6 +385,9 @@ class CoalitionMissionPlanner:
     MAX_SEAD_RANGE = nm_to_meter(150)
     MAX_STRIKE_RANGE = nm_to_meter(150)
 
+    NON_CAP_MIN_DELAY = 1
+    NON_CAP_MAX_DELAY = 5
+
     def __init__(self, game: Game, is_player: bool) -> None:
         self.game = game
         self.is_player = is_player
@@ -430,6 +434,8 @@ class CoalitionMissionPlanner:
         for proposed_mission in self.propose_missions():
             self.plan_mission(proposed_mission)
 
+        self.stagger_missions()
+
         for cp in self.objective_finder.friendly_control_points():
             inventory = self.game.aircraft_inventory.for_control_point(cp)
             for aircraft, available in inventory.all_aircraft:
@@ -467,6 +473,34 @@ class CoalitionMissionPlanner:
             flight_plan_builder.populate_flight_plan(flight)
         self.ato.add_package(package)
 
+    def stagger_missions(self) -> None:
+        def start_time_generator(count: int, earliest: int, latest: int,
+                                 margin: int) -> Iterator[int]:
+            interval = latest // count
+            for time in range(earliest, latest, interval):
+                error = random.randint(-margin, margin)
+                yield max(0, time + error)
+
+        dca_types = (
+            FlightType.BARCAP,
+            FlightType.CAP,
+            FlightType.INTERCEPTION,
+        )
+
+        non_dca_packages = [p for p in self.ato.packages if
+                            p.primary_task not in dca_types]
+
+        start_time = start_time_generator(
+            count=len(non_dca_packages),
+            earliest=5,
+            latest=90,
+            margin=5
+        )
+        for package in non_dca_packages:
+            package.delay = next(start_time)
+            for flight in package.flights:
+                flight.scheduled_in = package.delay
+
     def message(self, title, text) -> None:
         """Emits a planning message to the player.
 

qt_ui/windows/mission/flight/QFlightCreator.py

@@ -27,6 +27,7 @@ class QFlightCreator(QDialog):
         super().__init__()
 
         self.game = game
+        self.package = package
 
         self.setWindowTitle("Create flight")
         self.setWindowIcon(EVENT_ICONS["strike"])
@@ -90,6 +91,7 @@ class QFlightCreator(QDialog):
         size = self.flight_size_spinner.value()
 
         flight = Flight(aircraft, size, origin, task)
+        flight.scheduled_in = self.package.delay
 
         # noinspection PyUnresolvedReferences
         self.created.emit(flight)