Damage check triggers also pause for target selection

Damage check now places the card, then pauses on a trigger with PendingTrigger(DamageCheck) and the remaining damage count. Resolving applies the same +5000 and secondary effect as drive check, then continues the remaining damage or closes the battle. 34 tests.

server/src/Vanguard.Rules/Engine/GameEngine.cs

@@ -9,10 +9,9 @@ namespace Vanguard.Rules.Engine;
 /// Упрощения первого среза (карты со способностями подключаются следующим шагом):
 ///   * Sentinel добавляет 0 щита и не оплачивает стоимость — Perfect Guard пока не работает;
 ///   * Boost не реализован;
-///   * триггер на drive check требует выбора целей через ResolveTriggerCommand:
+///   * триггер требует выбора целей через ResolveTriggerCommand:
 ///     +5000 любой карте в кругах Авангарда или Арьергарда, затем второй эффект;
-///   * триггер на damage check пока применяет только второй эффект,
-///     Stand поднимает первый повёрнутый Арьергард.
+///     правило одинаково для drive check и damage check.
 /// </summary>
 public sealed class GameEngine
 {
@@ -485,8 +484,12 @@ public sealed class GameEngine
         {
             State.Step = Step.Drive;
             ContinueDriveChecks(battle);
+            return CommandResult.Ok();
         }
 
+        if (pending.Context == TriggerContext.DamageCheck)
+            FinishDamage(pending);
+
         return CommandResult.Ok();
     }
 
@@ -532,6 +535,9 @@ public sealed class GameEngine
             }
         }
 
+        if (State.PendingTrigger is not null)
+            return;
+
         ClearBattle(battle);
     }
 
@@ -567,17 +573,28 @@ public sealed class GameEngine
             if (card is null)
                 return;
 
+            card.FaceUp = false;
+            State.Players[player].Damage.Add(card);
+            _events.Add(new DamageTakenEvent(player, 1, State.Players[player].Damage.Count));
+
             var def = State.Catalog.CardOf(card.PrintingId);
             if (def.Trigger != TriggerType.None)
             {
                 _events.Add(new TriggerResolvedEvent(player, card.PrintingId, def.Trigger));
-                ApplyDamageTrigger(player, def.Trigger);
+                State.PendingTrigger = new PendingTrigger
+                {
+                    Player = player,
+                    PrintingId = card.PrintingId,
+                    Trigger = def.Trigger,
+                    Context = TriggerContext.DamageCheck,
+                    GrantsPower = true,
+                    RemainingDamage = amount - i - 1,
+                };
+                State.Step = Step.Trigger;
+                State.ActivePlayer = player;
+                return;
             }
 
-            card.FaceUp = false;
-            State.Players[player].Damage.Add(card);
-            _events.Add(new DamageTakenEvent(player, 1, State.Players[player].Damage.Count));
-
             if (State.Players[player].Damage.Count >= MaxDamage)
             {
                 Defeat(player);
@@ -586,33 +603,30 @@ public sealed class GameEngine
         }
     }
 
-    private void ApplyDamageTrigger(int player, TriggerType trigger)
+    /// <summary>Продолжает урон после разрешения триггера damage check.</summary>
+    private void FinishDamage(PendingTrigger pending)
     {
-        switch (trigger)
-        {
-            case TriggerType.Draw:
-                Draw(player, 1);
-                break;
-            case TriggerType.Stand:
-                StandFirstRested(player);
-                break;
-            case TriggerType.Heal:
-                Heal(player);
-                break;
-        }
-    }
+        if (State.IsFinished)
+            return;
 
-    private void StandFirstRested(int player)
-    {
-        var p = State.Players[player];
-        for (var i = 0; i < p.RearGuards.Length; i++)
+        var player = pending.Player;
+
+        if (State.Players[player].Damage.Count >= MaxDamage)
         {
-            if (p.RearGuards[i] is { Rested: true } unit)
-            {
-                unit.Rested = false;
-                return;
-            }
+            Defeat(player);
+            return;
         }
+
+        if (pending.RemainingDamage > 0)
+            DealDamage(player, pending.RemainingDamage);
+
+        if (State.PendingTrigger is not null)
+            return;
+
+        State.Step = Step.None;
+
+        if (State.Battle is { } battle)
+            ClearBattle(battle);
     }
 
     private void Heal(int player)

server/src/Vanguard.Rules/Engine/GameModels.cs

@@ -37,6 +37,9 @@ public sealed class PendingTrigger
 
     /// <summary>На drive check триггер сначала даёт +5000 силы, на damage check — нет.</summary>
     public required bool GrantsPower { get; init; }
+
+    /// <summary>Сколько урона осталось раздать после этого триггера (контекст damage check).</summary>
+    public int RemainingDamage { get; init; }
 }
 
 /// <summary>Экземпляр карты в партии. Один принт может встречаться много раз.</summary>

server/tests/Vanguard.Rules.Tests/GameEngineTests.cs

@@ -153,6 +153,30 @@ public class GameEngineTests
         Assert.False(rearGuard.Rested);
     }
 
+    [Fact]
+    public void Damage_Trigger_Also_Asks_For_Targets_And_Applies_Effect()
+    {
+        var engine = ReadyToAttack();
+        StackDeck(engine.State.Players[0], Gallatin, Gallatin);
+        StackDeck(engine.State.Players[1], Nike);
+
+        Assert.True(engine.Execute(new AttackCommand(-1, -1)).Accepted);
+        Assert.True(engine.Execute(new PassGuardCommand()).Accepted);
+
+        var pending = engine.State.PendingTrigger;
+        Assert.NotNull(pending);
+        Assert.Equal(TriggerContext.DamageCheck, pending!.Context);
+        Assert.Single(engine.State.Players[1].Damage);
+
+        Assert.True(engine.Execute(new ResolveTriggerCommand(-1, -1)).Accepted);
+
+        Assert.Null(engine.State.PendingTrigger);
+        Assert.Null(engine.State.Battle);
+        Assert.Single(engine.State.Players[1].Damage);
+        Assert.Contains(engine.State.Players[1].Damage, c => c.PrintingId == Nike);
+        Assert.Contains(engine.Events, e => e is TriggerAppliedEvent { Player: 1 });
+    }
+
     [Fact]
     public void ResolveTrigger_Rejects_When_Nothing_Is_Pending()
     {