Move generation calculation to Board

56_Life_for_Two/csharp/Board.cs

@@ -1,3 +1,5 @@
+using System.Collections.Immutable;
+
 namespace LifeforTwo;
 
 internal class Board
@@ -7,6 +9,12 @@ internal class Board
     private const int Player2 = 0x1000;
     private const int PieceMask = Player1 | Player2;
     private const int NeighbourValueOffset = 8;
+
+    private readonly ImmutableHashSet<int> _willBePlayer1 = 
+        new[] { 0x0003, 0x0102, 0x0103, 0x0120, 0x0130, 0x0121, 0x0112, 0x0111, 0x0012 }.ToImmutableHashSet();
+    private readonly ImmutableHashSet<int> _willBePlayer2 = 
+        new[] { 0x0021, 0x0030, 0x1020, 0x1030, 0x1011, 0x1021, 0x1003, 0x1002, 0x1012 }.ToImmutableHashSet();
+
     private readonly int[,] _cells = new int[7,7];
 
     public int this[Coordinates coordinates]
@@ -21,6 +29,30 @@ internal class Board
         set => _cells[x, y] = value;
     }
 
+    public (int Player1Count, int Player2Count) CalculateNextGeneration()
+    {
+        var _cellCounts = new Dictionary<int, int>() { [Empty] = 0, [Player1] = 0, [Player2] = 0 };
+
+        for (var x = 1; x <= 5; x++)
+        {
+            for (var y = 1; y <= 5; y++)
+            {
+                var currentValue = this[x, y];
+                var newValue = currentValue switch
+                {
+                    _ when _willBePlayer1.Contains(currentValue) => Player1,
+                    _ when _willBePlayer2.Contains(currentValue) => Player2,
+                    _ => Empty
+                };
+
+                this[x, y] = newValue;
+                _cellCounts[newValue]++;
+            }
+        }
+
+        return (_cellCounts[Player1], _cellCounts[Player2]);
+    }
+
     public void CalculateNeighbours()
     {
         for (var x = 1; x <= 5; x++)