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;
        
    }
    
     
}