Damage calculation including elemental buff/resistance

src/enemy/Enemy.cs

@@ -1,7 +1,9 @@
 using Chickensoft.AutoInject;
+using Chickensoft.Collections;
 using Chickensoft.GodotNodeInterfaces;
 using Chickensoft.Introspection;
 using Godot;
+using System;
 using System.Linq;
 
 namespace GameJamDungeon;
@@ -10,9 +12,9 @@ public interface IEnemy : ICharacterBody3D
 {
   public IEnemyLogic EnemyLogic { get; }
 
-  public int CurrentHP { get; set; }
+  public AutoProp<double> CurrentHP { get; set; }
 
-  public Resource EnemyStats { get; set; }
+  public EnemyStatInfo EnemyStatInfo { get; set; }
 
   public NavigationAgent3D NavAgent { get; set; }
 }
@@ -31,28 +33,28 @@ public partial class Enemy : CharacterBody3D, IEnemy, IProvide<IEnemyLogic>
   [Dependency] IGameRepo GameRepo => this.DependOn<IGameRepo>();
 
   [Export]
-  public Resource EnemyStats { get; set; } = new();
+  public EnemyStatInfo EnemyStatInfo { get; set; } = new();
 
   public static PackedScene CollisionDetectorScene => GD.Load<PackedScene>("res://src/enemy/CollisionDetector.tscn");
 
   public static Area3D CollisionDetector { get; set; } = default!;
 
-  public int CurrentHP { get; set; }
+  public AutoProp<double> CurrentHP { get; set; }
 
   [Node] public NavigationAgent3D NavAgent { get; set; } = default!;
 
   public void Setup()
   {
     EnemyLogic = new EnemyLogic();
-    EnemyLogic.Set(EnemyStats);
+    EnemyLogic.Set(EnemyStatInfo);
     EnemyLogic.Set(this as IEnemy);
     EnemyLogic.Set(GameRepo);
   }
 
   public void Initialize()
   {
-    var enemyResource = EnemyStats as EnemyStats;
-    CurrentHP = enemyResource.MaximumHP;
+    CurrentHP = new AutoProp<double>(EnemyStatInfo.MaximumHP);
+    CurrentHP.Sync += OnHPChanged;
   }
 
   public void OnResolved()
@@ -71,7 +73,6 @@ public partial class Enemy : CharacterBody3D, IEnemy, IProvide<IEnemyLogic>
       })
       .Handle((in EnemyLogic.Output.Die output) =>
       {
-        CollisionDetector.Dispose();
         QueueFree();
       })
       .Handle((in EnemyLogic.Output.HitByPlayer output) =>
@@ -112,14 +113,21 @@ public partial class Enemy : CharacterBody3D, IEnemy, IProvide<IEnemyLogic>
   {
     if (body is IHitbox hitBox)
     {
-      if (CurrentHP > 0)
+      if (CurrentHP.Value > 0)
       {
-        GD.Print("Enemy Hit");
-        EnemyLogic.Input(new EnemyLogic.Input.HitByPlayer(hitBox.Damage));
+        var damage = DamageCalculator.CalculatePlayerDamage(hitBox.Damage, hitBox.GetParent<IPlayer>().PlayerStatInfo, EnemyStatInfo);
+        GD.Print($"Enemy Hit for {damage} damage.");
+        EnemyLogic.Input(new EnemyLogic.Input.HitByPlayer(damage));
       }
     }
   }
 
+  private void OnHPChanged(double newHP)
+  {
+    if (newHP <= 0)
+      EnemyLogic.Input(new EnemyLogic.Input.Killed());
+  }
+
   public void OnReady()
   {
     SetPhysicsProcess(true);