Add AI components and systems for enhanced enemy behavior and pathfinding

GameCore/AI/AIAimSystem.cs

@@ -0,0 +1,54 @@
+using GameCore.Combat;
+using GameCore.ECS;
+using GameCore.ECS.Interfaces;
+using GameCore.Input;
+using GameCore.Physics;
+using GameCore.Player;
+
+namespace GameCore.AI;
+
+public class AIAimSystem : ISystem
+{
+    private const float MinAimDistance = 0.5f;
+
+    public void Update(World world, float deltaTime)
+    {
+        var entities = world.GetEntitiesWith<AIComponent>();
+        foreach (var entity in entities)
+        {
+            if (world.GetComponent<PlayerComponent>(entity) != null)
+            {
+                world.Logger.Warn("AI entity has PlayerComponent; skipping AI aim processing.");
+                continue;
+            }
+
+            var ai = world.GetComponent<AIComponent>(entity);
+            var input = world.GetComponent<InputStateComponent>(entity);
+            var pos = world.GetComponent<PositionComponent>(entity);
+            var weapon = world.GetComponent<WeaponComponent>(entity);
+
+            if (ai == null || input == null || pos == null || weapon == null)
+            {
+                if (input != null) input.IsFiring = false;
+                continue;
+            }
+
+            input.IsFiring = false;
+
+            if (ai.CurrentState == AIState.Chase || ai.CurrentState == AIState.Attack)
+            {
+                var vectorToTarget = ai.LastKnownTargetPosition - input.MuzzlePosition;
+                var distanceToTarget = vectorToTarget.Length();
+
+                if (distanceToTarget > MinAimDistance)
+                {
+                    var directionToTarget = vectorToTarget.Normalize();
+                    input.MuzzleDirection = directionToTarget;
+                    input.LookDirection = directionToTarget;
+                }
+            }
+
+            if (ai.CurrentState == AIState.Attack) input.IsFiring = true;
+        }
+    }
+}