refactor (#6)

Reviewed-on: #6

scripts/Events/StatisticsEventHandler.cs

@@ -0,0 +1,62 @@
+using Godot;
+using Mr.BrickAdventures;
+using Mr.BrickAdventures.Autoloads;
+
+namespace Mr.BrickAdventures.scripts.Events;
+
+/// <summary>
+/// Handles game events and updates statistics accordingly.
+/// Listens to EventBus signals and increments relevant stats.
+/// </summary>
+public partial class StatisticsEventHandler : Node
+{
+    private StatisticsManager _statisticsManager;
+
+    public override void _Ready()
+    {
+        _statisticsManager = GetNode<StatisticsManager>(Constants.StatisticsManagerPath);
+
+        // Subscribe to events
+        EventBus.Instance.CoinCollected += OnCoinCollected;
+        EventBus.Instance.EnemyDefeated += OnEnemyDefeated;
+        EventBus.Instance.PlayerDied += OnPlayerDied;
+        EventBus.Instance.LevelCompleted += OnLevelCompleted;
+        EventBus.Instance.ChildRescued += OnChildRescued;
+    }
+
+    public override void _ExitTree()
+    {
+        if (EventBus.Instance == null) return;
+
+        EventBus.Instance.CoinCollected -= OnCoinCollected;
+        EventBus.Instance.EnemyDefeated -= OnEnemyDefeated;
+        EventBus.Instance.PlayerDied -= OnPlayerDied;
+        EventBus.Instance.LevelCompleted -= OnLevelCompleted;
+        EventBus.Instance.ChildRescued -= OnChildRescued;
+    }
+
+    private void OnCoinCollected(int amount, Vector2 position)
+    {
+        _statisticsManager.IncrementStat("coins_collected", amount);
+    }
+
+    private void OnEnemyDefeated(Node enemy, Vector2 position)
+    {
+        _statisticsManager.IncrementStat("enemies_defeated");
+    }
+
+    private void OnPlayerDied(Vector2 position)
+    {
+        _statisticsManager.IncrementStat("deaths");
+    }
+
+    private void OnLevelCompleted(int levelIndex, Node currentScene, double completionTime)
+    {
+        _statisticsManager.IncrementStat("levels_completed");
+    }
+
+    private void OnChildRescued(Vector2 position)
+    {
+        _statisticsManager.IncrementStat("children_rescued");
+    }
+}