using UnityEngine;

namespace BlueWater
{
    public class SeeThrough : MonoBehaviour
    {
        [SerializeField]
        private LayerMask _maskLayer;
        
        private Camera _mainCamera;
        private Renderer _previousRenderer;
        
        // Hashes
        private static readonly int _sizeHash = Shader.PropertyToID("_Size");

        private void Start()
        {
            _mainCamera = CombatCameraManager.Instance.MainCamera;
        }

        private void Update()
        {
            if (!_mainCamera) return;
            
            var direction = _mainCamera.transform.position - transform.position;
            var ray = new Ray(transform.position, direction.normalized);

            if (Physics.Raycast(ray, out var hit, 100f, _maskLayer))
            {
                var hitRenderer = hit.collider.GetComponentInChildren<Renderer>();
                if (!hitRenderer) return;

                if (!hitRenderer.material.HasProperty(_sizeHash)) return;
                
                if (_previousRenderer && _previousRenderer != hitRenderer && _previousRenderer.material.HasProperty(_sizeHash))
                {
                    _previousRenderer.material.SetFloat(_sizeHash, 0f);
                }

                hitRenderer.material.SetFloat(_sizeHash, 0.5f);
                _previousRenderer = hitRenderer;
            }
            else
            {
                if (!_previousRenderer) return;

                if (_previousRenderer.material.HasProperty(_sizeHash))
                {
                    _previousRenderer.material.SetFloat(_sizeHash, 0f);
                }
                _previousRenderer = null;
            }
        }
    }
}