using UnityEngine;

namespace SpellBoundAR.CustomTextures.UI
{
    public class TexturePreviewDeleteCascade : MonoBehaviour
    {
        [Header("Cache")]
        private TexturePreview _texturePreview;
        private ISavedCustomTexture _savedCustomTexture;

        private void Awake()
        {
            _texturePreview = GetComponentInParent<TexturePreview>();
        }

        private void OnEnable() => StartListeningToEverything();
        private void OnDisable() => StopListeningToEverything();
        private void OnDestroy() => StopListeningToEverything();
        
        private void StartListeningToEverything()
        {
            if (_texturePreview) _texturePreview.OnSavedTextureDataChanged += StartListeningForDelete;
            StartListeningForDelete();
        }
        
        private void StopListeningToEverything()
        {
            if (_texturePreview) _texturePreview.OnSavedTextureDataChanged -= StartListeningForDelete;
            StopListeningForDelete();
        }

        private void StartListeningForDelete()
        {
            if (_savedCustomTexture != null) _savedCustomTexture.OnDeleted -= OnSavedCustomTextureDeleted;
            _savedCustomTexture = _texturePreview ? _texturePreview.SavedCustomTexture : null;
            if (_savedCustomTexture != null) _savedCustomTexture.OnDeleted += OnSavedCustomTextureDeleted;
        }
        
        private void StopListeningForDelete()
        {
            if (_savedCustomTexture != null) _savedCustomTexture.OnDeleted -= OnSavedCustomTextureDeleted;
            _savedCustomTexture = null;
        }

        private void OnSavedCustomTextureDeleted()
        {
            Destroy(gameObject);
        }
    }
}