Implement L and T Shapes

Assets/Scripts/Services/GameBoardService.cs

@@ -183,10 +183,10 @@ namespace Services {
         private async UniTask DestroyMatchesAsync(List<Vector2Int> protectedPositions) {
             List<Vector2Int> matchPositions = new List<Vector2Int>(this.matchService.CurrentMatches.Count);
             for (int i = 0; i < this.matchService.CurrentMatches.Count; i++) {
-                var m = this.matchService.CurrentMatches[i];
-                if (m == null) continue;
+                Gem match = this.matchService.CurrentMatches[i];
+                if (match == null) continue;
 
-                Vector2Int pos = m.Position;
+                Vector2Int pos = match.Position;
                 if (protectedPositions != null && protectedPositions.Contains(pos))
                     continue;
 

Assets/Scripts/Services/MatchService.cs

@@ -88,12 +88,80 @@ namespace Services {
                     }
                 }
 
+            if (this.currentMatches.Count > 0)
+                this.currentMatches = this.currentMatches.Distinct().ToList();
+            
+            ExpandMatchesForLTShapes();
+            
             if (this.currentMatches.Count > 0)
                 this.currentMatches = this.currentMatches.Distinct().ToList();
 
             DetectBombSpawnFromLastSwap();
         }
         
+        private void ExpandMatchesForLTShapes() {
+            if (this.currentMatches.Count == 0)
+                return;
+
+            List<Gem> seeds = this.currentMatches.ToList();
+
+            foreach (Gem pivotGem in seeds) {
+                if (pivotGem == null)
+                    continue;
+
+                Vector2Int pivot = pivotGem.Position;
+
+                int left = CountLine(pivot, Vector2Int.left);
+                int right = CountLine(pivot, Vector2Int.right);
+                int up = CountLine(pivot, Vector2Int.up);
+                int down = CountLine(pivot, Vector2Int.down);
+
+                int horizontalLen = left + 1 + right;
+                int verticalLen = up + 1 + down;
+
+                bool hasHorizontalMatch = horizontalLen >= 3;
+                bool hasVerticalMatch = verticalLen >= 3;
+
+                // one more in the perpendicular direction = length = 2
+                bool hasHorizontalArm = horizontalLen >= 2;
+                bool hasVerticalArm = verticalLen >= 2;
+
+                // Main horizontal + vertical arm = include vertical run
+                if (hasHorizontalMatch && hasVerticalArm) {
+                    AddRun(pivot, Vector2Int.up);
+                    AddRun(pivot, Vector2Int.down);
+                    this.currentMatches.Add(pivotGem);
+                }
+
+                // Main vertical + horizontal arm = include horizontal run
+                if (hasVerticalMatch && hasHorizontalArm) {
+                    AddRun(pivot, Vector2Int.left);
+                    AddRun(pivot, Vector2Int.right);
+                    this.currentMatches.Add(pivotGem);
+                }
+            }
+        }
+        
+        private void AddRun(Vector2Int start, Vector2Int direction) {
+            Gem startGem = this.gameBoard.GetGemAt(start);
+            if (startGem == null)
+                return;
+
+            GemType color = startGem.MatchColor;
+
+            Vector2Int position = start + direction;
+            while (position.x >= 0 && position.x < this.gameBoard.Width &&
+                   position.y >= 0 && position.y < this.gameBoard.Height) {
+
+                Gem g = this.gameBoard.GetGemAt(position);
+                if (g == null || g.MatchColor != color)
+                    break;
+
+                this.currentMatches.Add(g);
+                position += direction;
+            }
+        }
+        
         private void DetectBombSpawnFromLastSwap() {
             Vector2Int from = this.lastSwapFrom;
             Vector2Int to = this.lastSwapTo;
@@ -114,20 +182,67 @@ namespace Services {
             if (this.currentMatches.All(g => g.Position != pivot))
                 return;
 
-            int horizontal = CountLine(pivot, Vector2Int.left) + 1 + CountLine(pivot, Vector2Int.right);
-            int vertical = CountLine(pivot, Vector2Int.up) + 1 + CountLine(pivot, Vector2Int.down);
-
-            int best = Mathf.Max(horizontal, vertical);
-            if (best < 4)
+            // NEW RULE:
+            // If the match group that includes this pivot (including L/T expansions) has 4+ gems, spawn a bomb.
+            int groupSize = GetMatchedGroupSizeIncludingLT(pivot);
+            if (groupSize < 4)
                 return;
 
-            // Spawn a bomb on the creating slot with the same color group.
             // Prevent duplicates for the same cell.
             if (this.pendingBombSpawns.Any(b => b.Position == pivot))
                 return;
 
             this.pendingBombSpawns.Add(new BombSpawnRequest(pivot, pivotGem.MatchColor));
         }
+
+        private int GetMatchedGroupSizeIncludingLT(Vector2Int pivot) {
+            Gem pivotGem = this.gameBoard.GetGemAt(pivot);
+            if (pivotGem == null)
+                return 0;
+
+            GemType color = pivotGem.MatchColor;
+
+            // Only count gems that are actually in currentMatches (which already includes L/T expansions).
+            HashSet<Vector2Int> matchedPositions = new HashSet<Vector2Int>(
+                this.currentMatches
+                    .Where(g => g != null && g.MatchColor == color)
+                    .Select(g => g.Position)
+            );
+
+            if (!matchedPositions.Contains(pivot))
+                return 0;
+
+            Queue<Vector2Int> queue = new Queue<Vector2Int>();
+            HashSet<Vector2Int> visited = new HashSet<Vector2Int>();
+
+            queue.Enqueue(pivot);
+            visited.Add(pivot);
+
+            Vector2Int[] directions = {
+                Vector2Int.left,
+                Vector2Int.right,
+                Vector2Int.up,
+                Vector2Int.down
+            };
+
+            while (queue.Count > 0) {
+                Vector2Int currentPivot = queue.Dequeue();
+
+                for (int i = 0; i < directions.Length; i++) {
+                    Vector2Int n = currentPivot + directions[i];
+                    if (visited.Contains(n))
+                        continue;
+
+                    if (!matchedPositions.Contains(n))
+                        continue;
+
+                    visited.Add(n);
+                    queue.Enqueue(n);
+                }
+            }
+
+            return visited.Count;
+        }
         
         private int CountLine(Vector2Int start, Vector2Int direction) {
             Gem startGem = this.gameBoard.GetGemAt(start);