Add SkillManager class and integrate with PlayerController and SkillUnlockerComponent (#10)

Autoloads/SkillManager.cs

@@ -0,0 +1,213 @@
+using System.Collections.Generic;
+using System.Linq;
+using Godot;
+using Godot.Collections;
+using Mr.BrickAdventures.scripts.components;
+using Mr.BrickAdventures.scripts.interfaces;
+using Mr.BrickAdventures.scripts.Resources;
+
+namespace Mr.BrickAdventures.Autoloads;
+
+public partial class SkillManager : Node
+{
+    private GameManager _gameManager;
+    private PlayerController _player;
+
+    [Export] public Array<SkillData> AvailableSkills { get; set; } = [];
+    
+    public Dictionary ActiveComponents { get; private set; } = new();
+
+    [Signal]
+    public delegate void ActiveThrowSkillChangedEventHandler(BrickThrowComponent throwComponent);
+    
+    public override void _Ready()
+    {
+        _gameManager = GetNode<GameManager>("/root/GameManager");
+    }
+    
+    /// <summary>
+    /// Called by the PlayerController from its _Ready method to register itself with the manager.
+    /// </summary>
+    public void RegisterPlayer(PlayerController player)
+    {
+        if (_player == player) return;
+
+        // If a player is already registered (e.g., from a previous scene), unregister it first.
+        if (_player != null && IsInstanceValid(_player))
+        {
+            UnregisterPlayer();
+        }
+        
+        _player = player;
+        if (_player != null)
+        {
+            // Automatically unregister when the player node is removed from the scene.
+            _player.TreeExiting += UnregisterPlayer;
+            ApplyUnlockedSkills();
+        }
+    }
+
+    /// <summary>
+    /// Cleans up skills and references related to the current player.
+    /// </summary>
+    private void UnregisterPlayer()
+    {
+        if (_player != null && IsInstanceValid(_player))
+        {
+            _player.TreeExiting -= UnregisterPlayer;
+            RemoveAllActiveSkills();
+        }
+        _player = null;
+    }
+    
+    public void AddSkill(SkillData skillData)
+    {
+        // Ensure a valid player is registered before adding a skill.
+        if (_player == null || !IsInstanceValid(_player))
+        {
+            GD.Print("SkillManager: Player not available to add skill.");
+            return;
+        }
+    
+        if (ActiveComponents.ContainsKey(skillData.Name))
+            return;
+
+        if (skillData.Type == SkillType.Throw)
+        {
+            var unlocked = _gameManager.GetUnlockedSkills();
+            foreach (var sd in unlocked)
+            {
+                SkillData data = null;
+                foreach (var s in AvailableSkills)
+                {
+                    if (s == sd)
+                    {
+                        data = s;
+                        break;
+                    }
+                }
+                // Remove other throw skills if a new one is added
+                if (data is { Type: SkillType.Throw })
+                    RemoveSkill(data.Name);
+            }
+        }
+
+        var instance = skillData.Node.Instantiate();
+        if (instance is ISkill skill)
+        {
+            // Initialize the skill with the registered player instance.
+            skill.Initialize(_player, skillData); 
+            skill.Activate();
+        } 
+        else
+        {
+            GD.PrintErr($"Skill scene for '{skillData.Name}' does not implement ISkill!");
+            instance.QueueFree();
+            return;
+        }
+
+        // Add the skill node as a child of the player.
+        _player.AddChild(instance);
+        ActiveComponents[skillData.Name] = instance;
+        
+        if (instance is BrickThrowComponent btc)
+        {
+           EmitSignalActiveThrowSkillChanged(btc);
+        }
+    }
+    
+    public void RemoveSkill(string skillName)
+    {
+        if (!ActiveComponents.TryGetValue(skillName, out var component))
+            return;
+        
+        if (component.AsGodotObject() is BrickThrowComponent)
+        {
+            EmitSignalActiveThrowSkillChanged(null);
+        }
+
+        var inst = (Node)component;
+        if (inst is ISkill skill)
+        {
+            skill.Deactivate();
+        }
+        
+        if (IsInstanceValid(inst))
+            inst.QueueFree();
+
+        var skills = _gameManager.GetUnlockedSkills();
+        foreach (var s in skills)
+        {
+            if (s.Name == skillName)
+            {
+                s.IsActive = false;
+                break;
+            }
+        }
+        ActiveComponents.Remove(skillName);
+    }
+    
+    private void RemoveAllActiveSkills()
+    {
+        // Create a copy of keys to avoid modification during iteration
+        var keys = ActiveComponents.Keys.ToArray();
+        var skillNames = keys.Select(key => key.ToString()).ToList();
+
+        foreach (var skillName in skillNames)
+        {
+            RemoveSkill(skillName);
+        }
+    }
+
+    public void ApplyUnlockedSkills()
+    {
+        if (_player == null || !IsInstanceValid(_player)) return;
+
+        foreach (var sd in AvailableSkills)
+        {
+            if (_gameManager.IsSkillUnlocked(sd))
+            {
+                CallDeferred(MethodName.AddSkill, sd);
+            }
+            else
+            {
+                RemoveSkill(sd.Name);
+            }
+        }
+    }
+
+    public SkillData GetSkillByName(string skillName)
+    {
+        foreach (var sd in AvailableSkills)
+            if (sd.Name == skillName) return sd;
+        return null;
+    }
+
+    public void ActivateSkill(SkillData skill)
+    {
+        if (!ActiveComponents.ContainsKey(skill.Name))
+        {
+            AddSkill(skill);
+            skill.IsActive = true;
+        }
+    }
+
+    public void DeactivateSkill(SkillData skill)
+    {
+        if (ActiveComponents.ContainsKey(skill.Name))
+        {
+            RemoveSkill(skill.Name);
+            skill.IsActive = false;
+        }
+    }
+
+    public void ToggleSkillActivation(SkillData skill)
+    {
+        if (skill == null) return;
+
+        if (ActiveComponents.ContainsKey(skill.Name))
+            DeactivateSkill(skill);
+        else
+            ActivateSkill(skill);
+    }
+}