Quelques trucs pour structuer

Assets/Scripts.meta

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Assets/Scripts/AttackHandler.cs

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+using System;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class AttackHandler : MonoBehaviour
+{
+    [SerializeField] private float damage;
+    [SerializeField] private float cooldown;
+    [SerializeField] private Collider attackShape;
+
+    private float _timer;
+
+    void Start()
+    {
+        _timer = cooldown;
+    }
+
+    void Update()
+    {
+        _timer = Mathf.Max(_timer - Time.deltaTime, 0f);
+    }
+
+    public bool Attack()
+    {
+        if (_timer >= 0) return false;
+        Collider[] targets = DetectTargets();
+        foreach (Collider target in targets)
+        {
+            if (!target.CompareTag("Unit")) continue;
+            // GetComponent is expensive in performance, optimize here if it's slow
+            Unit unit = target.GetComponent<Unit>();
+            unit.healthHandler.TakeDamage(damage);
+
+        }
+        return true;
+    }
+
+    private Collider[] DetectTargets()
+    {
+        // Make sure to manager layers for better performance
+        
+        List<Unit> targets = new List<Unit>();
+        Collider[] hitColliders;
+
+        switch (attackShape)
+        {
+            case SphereCollider sphere:
+                hitColliders = Physics.OverlapSphere(sphere.transform.position, sphere.radius, sphere.includeLayers);
+                break;
+            case BoxCollider box:
+                hitColliders = Physics.OverlapBox(box.bounds.center, box.bounds.extents, box.transform.rotation, box.includeLayers);
+                break;
+            default:
+                throw new ArgumentException("Only sphere or box are supported");
+        }
+
+        return hitColliders;
+        
+    }
+    
+     
+}

Assets/Scripts/AttackHandler.cs.meta

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Assets/Scripts/HealthHandler.cs

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+using UnityEngine;
+
+public class HealthHandler : MonoBehaviour
+{
+    [SerializeField] private float maxHealth;
+    [SerializeField] private float currentHealth;
+    [SerializeField] private float armor;
+
+    public void TakeDamage(float damage)
+    {
+        Debug.Assert(damage >= 0, "Damage cannot be negative, use Heal if you want to heal");
+        currentHealth -= Mathf.Max(0, damage-armor);
+    }
+
+    public void Heal(float value)
+    {
+        Debug.Assert(value >= 0, "value can't be less than zero");
+        currentHealth = Mathf.Min(currentHealth + value, maxHealth);
+    }
+
+    public float GetArmor()
+    {
+        return armor;
+    }
+
+    public void EquipArmor(float armorBoost)
+    {
+        Debug.Assert(armorBoost >= 0, "armorBoost can't be less than zero, use UnEquipArmor instead");
+        armor += armorBoost;
+    }
+
+    public void UnEquipArmor(float armorBoost)
+    {
+        Debug.Assert(armorBoost >= 0, "armorBoost can't be less than zero, use EquipArmor instead");
+        armor -= armorBoost;
+    }
+    
+}

Assets/Scripts/HealthHandler.cs.meta

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Assets/Scripts/Unit.cs

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+using Unity.VisualScripting;
+using UnityEngine;
+
+
+public class Unit : MonoBehaviour
+{
+    [SerializeField] public HealthHandler healthHandler;
+    [SerializeField] public AttackHandler attackHandler;
+    
+
+    void Start()
+    {
+        // Null safety enjoyers things 
+        Debug.Assert(healthHandler != null);
+        Debug.Assert(attackHandler != null);
+
+    }
+    
+    
+}

Assets/Scripts/Unit.cs.meta

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