using UnityEngine;

namespace OnlyScove.Scripts
{
    [System.Serializable]
    public class CameraOcclusionTransparency
    {
        [Header("Occlusion Transparency")]
        [SerializeField] private bool useTransparency = true;
        [SerializeField] private LayerMask transparencyLayers;
        [SerializeField] private float fadeAlpha = 0.3f;

        private Renderer _lastFadedRenderer;
        private Color _originalColor;

        public void HandleTransparency(Transform cameraTransform, Vector3 focusPosition)
        {
            if (!useTransparency)
            {
                ResetLastRenderer();
                return;
            }

            Vector3 direction = focusPosition - cameraTransform.position;
            float distanceToPlayer = direction.magnitude;
            RaycastHit hit;

            if (Physics.Raycast(cameraTransform.position, direction.normalized, out hit, distanceToPlayer, transparencyLayers))
            {
                Renderer renderer = hit.collider.GetComponent<Renderer>();
                if (renderer != null && renderer != _lastFadedRenderer)
                {
                    ResetLastRenderer();

                    _lastFadedRenderer = renderer;
                    _originalColor = renderer.material.color;
                    Color fadedColor = _originalColor;
                    fadedColor.a = fadeAlpha;
                    
                    renderer.material.color = fadedColor;
                }
            }
            else
            {
                ResetLastRenderer();
            }
        }

        private void ResetLastRenderer()
        {
            if (_lastFadedRenderer != null)
            {
                _lastFadedRenderer.material.color = _originalColor;
                _lastFadedRenderer = null;
            }
        }
    }
}