init

actionBlocks_server/src/ActionBlocks.Game/Targeting/GarbageTargeter.cs

@@ -0,0 +1,34 @@
+namespace ActionBlocks.Game.Targeting;
+
+public interface IGarbageTargeter
+{
+    /// <summary>Picks who receives the next garbage attack from <paramref name="sender"/>, or null if nobody can.</summary>
+    PlayerGame? NextTarget(PlayerGame sender, IReadOnlyList<PlayerGame> players);
+}
+
+/// <summary>Cycles through the living opponents of each sender in turn.</summary>
+public sealed class CyclingGarbageTargeter : IGarbageTargeter
+{
+    private readonly Dictionary<string, int> _cursor = new();
+
+    public PlayerGame? NextTarget(PlayerGame sender, IReadOnlyList<PlayerGame> players)
+    {
+        var opponents = players.Where(p => p != sender).ToList();
+        if (opponents.Count == 0)
+        {
+            return null;
+        }
+
+        var start = _cursor.GetValueOrDefault(sender.PlayerId);
+        for (var i = 0; i < opponents.Count; i++)
+        {
+            var index = (start + i) % opponents.Count;
+            if (opponents[index].IsAlive)
+            {
+                _cursor[sender.PlayerId] = index + 1;
+                return opponents[index];
+            }
+        }
+        return null;
+    }
+}