...

ET/Web/Services/GameSimulationService.cs

@@ -33,11 +33,16 @@ public class RegionState
     }
 }
 
+public class TerrainActivation
+{
+    public string MeepleType { get; set; } = "";
+    public string RegionType { get; set; } = "";
+}
+
 public class TurnEvent
 {
     public int TurnNumber { get; set; }
-    public string MeepleType { get; set; } = "";
-    public List<string> RegionTypes { get; set; } = new();
+    public List<TerrainActivation> Activations { get; set; } = new();
     public List<string> Details { get; set; } = new();
 }
 
@@ -86,7 +91,24 @@ public class GameSimulationService
 
     public TurnEvent? GetCurrentEvent()
     {
-        return Data.Events.ElementAtOrDefault(Data.CurrentTurn - 1);
+        return Data.CurrentTurn > 0
+            ? Data.Events.ElementAtOrDefault(Data.CurrentTurn - 1)
+            : null;
+    }
+
+    public List<RegionState> GetPreviousState()
+    {
+        var prev = Data.CurrentTurn > 0 ? Data.CurrentTurn - 1 : 0;
+        return Data.Timeline[prev].Select(r => r.Clone()).ToList();
+    }
+
+    public (int predators, int prey, int flora)[] GetPopulationHistory()
+    {
+        return Data.Timeline.Select(t => (
+            t.Sum(r => r.PredatorMeeples),
+            t.Sum(r => r.PreyMeeples),
+            t.Sum(r => r.FloraMeeples)
+        )).ToArray();
     }
 
     private void GenerateAndApplyEvents()
@@ -101,23 +123,26 @@ public class GameSimulationService
             Data.Timeline.Add(Data.Regions.Select(r => r.Clone()).ToList());
         }
 
-        Data.CurrentTurn = 1;
+        Data.CurrentTurn = 0;
     }
 
     private TurnEvent GenerateTurnEvent(int turnNumber)
     {
         string[] meepleTypes = { "Predator", "Prey", "Flora" };
-        var meepleType = meepleTypes[_rng.Next(3)];
-
         string[] regionTypes = { "Grass", "Forest", "Mountain", "Water", "Wasteland" };
         var numTypes = _rng.Next(1, 4);
         var selectedTypes = regionTypes.OrderBy(_ => _rng.Next()).Take(numTypes).ToList();
 
+        var activations = selectedTypes.Select(rt => new TerrainActivation
+        {
+            RegionType = rt,
+            MeepleType = meepleTypes[_rng.Next(3)]
+        }).ToList();
+
         return new TurnEvent
         {
             TurnNumber = turnNumber,
-            MeepleType = meepleType,
-            RegionTypes = selectedTypes,
+            Activations = activations,
             Details = new List<string>()
         };
     }
@@ -126,25 +151,25 @@ public class GameSimulationService
     {
         var details = new List<string>();
 
-        foreach (var region in Data.Regions)
+        foreach (var activation in turnEvent.Activations)
         {
-            if (!turnEvent.RegionTypes.Contains(region.Terrain))
-                continue;
-
-            switch (turnEvent.MeepleType)
+            foreach (var region in Data.Regions.Where(r => r.Terrain == activation.RegionType))
             {
-                case "Flora":
-                    region.FloraMeeples++;
-                    details.Add($"{region.Name}: +1 Flora");
-                    break;
+                switch (activation.MeepleType)
+                {
+                    case "Flora":
+                        region.FloraMeeples++;
+                        details.Add($"{region.Name}: +1 Flora");
+                        break;
 
-                case "Predator":
-                    ApplyPredatorActivation(region, details);
-                    break;
+                    case "Predator":
+                        ApplyPredatorActivation(region, details);
+                        break;
 
-                case "Prey":
-                    ApplyPreyActivation(region, details);
-                    break;
+                    case "Prey":
+                        ApplyPreyActivation(region, details);
+                        break;
+                }
             }
         }