using BlueWater.Interfaces;
using UnityEngine;

namespace BlueWater
{
    public class SeeThrough : MonoBehaviour
    {
        [SerializeField]
        private LayerMask _maskLayer;

        [SerializeField]
        private float _size = 0.5f;
        
        private Camera _mainCamera;
        private Material _hitMaterialInstance;
        private Material _previousMaterialInstance;
        
        // 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))
            {
                _hitMaterialInstance = hit.collider.GetComponent<IMaterialInstance>()?.MaterialInstance;
                if (!_hitMaterialInstance) return;

                if (!_hitMaterialInstance.HasProperty(_sizeHash)) return;
                
                if (_previousMaterialInstance && _previousMaterialInstance != _hitMaterialInstance && _previousMaterialInstance.HasProperty(_sizeHash))
                {
                    _previousMaterialInstance.SetFloat(_sizeHash, 0f);
                }

                _hitMaterialInstance.SetFloat(_sizeHash, _size);
                _previousMaterialInstance = _hitMaterialInstance;
            }
            else
            {
                if (!_previousMaterialInstance) return;

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