using System;
using UnityEngine;
using UnityEngine.EventSystems;

public class MouseSelection : MonoBehaviour
{
    [SerializeField]
    private LayerMask _selectableLayerMask;
    private Transform _selection;
    private RaycastHit _raycastHit;
    public event EventHandler<OnSelectedObjectChangedEventArgs> OnSelectedObjectChanged;
    public class OnSelectedObjectChangedEventArgs : EventArgs
    {
        public Transform SelectedObject;
    }

    public static MouseSelection Instance { get; private set; }

    private void Awake()
    {
        if (Instance != null)
        {
            Debug.Log("There's more than one player instance");
        }
        Instance = this;
    }
    void Update()
    {
        var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        if (!EventSystem.current.IsPointerOverGameObject() && Physics.Raycast(ray, out _raycastHit, 100f, _selectableLayerMask))
        {
            OnSelectedObjectChanged?.Invoke(this, new OnSelectedObjectChangedEventArgs() { SelectedObject = _raycastHit.transform });
            //  _hightlight = _raycastHit.transform;
            // if (_hightlight.CompareTag("Selectable") && _hightlight != _selection)
            //    {
            //        if (_hightlight.gameObject.GetComponent<Outline>() != null)
            //        {
            //            _hightlight.gameObject.GetComponent<Outline>().enabled = true;
            //        }
            //        else
            //        {
            //            var outline = _hightlight.gameObject.AddComponent<Outline>();
            //            outline.enabled = true;
            //            _hightlight.gameObject.GetComponent<Outline>().OutlineColor = Color.yellow;
            //            _hightlight.gameObject.GetComponent<Outline>().OutlineWidth = 7f;
            //        }
            //    }
            //    else
            //    {
            //        _hightlight = null;
            //    }

        }
        else
        {
            OnSelectedObjectChanged?.Invoke(this, new OnSelectedObjectChangedEventArgs() { SelectedObject = null });
        }
    }
}