Implement debug switching

Assets/Scripts/Services/GameBoardService.cs

@@ -155,6 +155,52 @@ namespace Services {
             this.currentState = GameState.Move;
             return true;
         }
+
+        public async UniTask<bool> TrySwitch(Vector2Int position) {
+            Gem gem = this.gameBoard.GetGemAt(position);
+            if(gem == null)
+                return false;
+            
+            GemType[] normalTypes = Enum.GetValues(typeof(GemType))
+                .Cast<GemType>()
+                .Where(t => t != GemType.Bomb)
+                .ToArray();
+
+            if (normalTypes.Length == 0)
+                return false;
+            
+            bool nextIsBomb;
+            GemType nextTypeOrMatchColor;
+
+            if (gem.Type != GemType.Bomb) {
+                int index = Array.IndexOf(normalTypes, gem.Type);
+                if (index < 0) index = 0;
+
+                if (index < normalTypes.Length - 1) {
+                    nextIsBomb = false;
+                    nextTypeOrMatchColor = normalTypes[index + 1];
+                } else {
+                    nextIsBomb = true;
+                    nextTypeOrMatchColor = normalTypes[0]; 
+                }
+            } else {
+                int idx = Array.IndexOf(normalTypes, gem.MatchColor);
+                if (idx < 0) idx = 0;
+
+                if (idx < normalTypes.Length - 1) {
+                    nextIsBomb = true;
+                    nextTypeOrMatchColor = normalTypes[idx + 1];
+                } else {
+                    nextIsBomb = false;
+                    nextTypeOrMatchColor = normalTypes[0];
+                }
+            }
+
+            // Replace both model+view by releasing current and respawning at same position.
+            ReleaseMatchedGems(position);
+            SpawnGemGameObject(SetGemAt(position, nextTypeOrMatchColor, nextIsBomb), nextIsBomb);
+            return true;
+        }
         
         private void ApplySwap(Vector2Int from, Vector2Int to) {
             Gem fromGem = this.gameBoard.GetGemAt(from);

Assets/Scripts/Services/InputService.cs

@@ -6,6 +6,7 @@ namespace Services {
     public class InputService : MonoBehaviour, IInputService
     {
         public event Action<Vector2Int, Vector2Int> OnSwapRequested;
+        public event Action<Vector2Int> OnSwitchRequested;
 
         private Camera inputCamera;
         private Vector2 pointerDownScreenPos;
@@ -21,14 +22,14 @@ namespace Services {
 
         private void Update()
         {
-            if (TryGetPrimaryPointerState(out var isDown, out var screenPos))
+            if (TryGetPrimaryPointerState(out bool isDown, out Vector2 screenPos))
             {
                 if (!this.isPointerDown && isDown) {
-                    pointerDownScreenPos = screenPos;
+                    this.pointerDownScreenPos = screenPos;
                 }
 
                 if (this.isPointerDown && !isDown) {
-                    TryEmitSwap(pointerDownScreenPos, screenPos);
+                    TryEmitSwap(this.pointerDownScreenPos, screenPos);
                 }
 
                 this.isPointerDown = isDown;
@@ -38,6 +39,12 @@ namespace Services {
                 // No pointer available this frame (rare). Ensure we don't get stuck.
                 this.isPointerDown = false;
             }
+            
+            #if UNITY_EDITOR
+            if (TryGetSecondaryPointerClick(out screenPos)) {
+                OnSwitchRequested?.Invoke(WorldToCell(this.inputCamera.ScreenToWorldPoint(screenPos)));
+            }
+            #endif
         }
 
         private void TryEmitSwap(Vector2 downScreen, Vector2 upScreen)
@@ -105,5 +112,15 @@ namespace Services {
             isDown = Input.GetMouseButton(0);
             return true;
         }
+
+        private static bool TryGetSecondaryPointerClick(out Vector2 screenPosition) {
+            if (Input.GetMouseButtonDown(1)) {
+                screenPosition = Input.mousePosition;
+                return true;
+            }
+
+            screenPosition = Input.mousePosition;
+            return false;
+        }
     }
 }

Assets/Scripts/Services/Interfaces/IGameBoardService.cs

@@ -6,5 +6,6 @@ namespace Services.Interfaces {
         void Setup();
         
         UniTask<bool> TrySwap(Vector2Int from, Vector2Int to);
+        UniTask<bool> TrySwitch(Vector2Int position);
     }
 }

Assets/Scripts/Services/Interfaces/IInputService.cs

@@ -4,5 +4,6 @@ using UnityEngine;
 namespace Services.Interfaces {
     public interface IInputService {
         event Action<Vector2Int, Vector2Int> OnSwapRequested;
+        event Action<Vector2Int> OnSwitchRequested;
     }
 }

Assets/Scripts/Services/LevelEntryPoint.cs

@@ -25,10 +25,15 @@ namespace Services
         {
             this.gameBoardService.Setup();
             this.inputService.OnSwapRequested += HandleSwapRequest;
+            this.inputService.OnSwitchRequested += HandleSwitchRequest;
         }
         
         private void HandleSwapRequest(Vector2Int from, Vector2Int to) {
             this.gameBoardService.TrySwap(from, to);   
         }
+
+        private void HandleSwitchRequest(Vector2Int position) {
+            this.gameBoardService.TrySwitch(position);
+        }
     }
 }