using UnityEngine;

namespace Misaki.AoVolume
{
    [ExecuteInEditMode]
    internal class AoVolume : MonoBehaviour
    {
        private VolumeEntity _entity = VolumeEntity.Invalid;

        public bool dynamicVolume;
        public VolumeData data;

        private void UpdateMatrixData()
        {
            data.worldMatrix = transform.localToWorldMatrix;
            data.inverseWorldMatrix = transform.worldToLocalMatrix;
        }

        private void OnEnable()
        {
            if (_entity.IsValid)
            {
                return;
            }

            UpdateMatrixData();
            _entity = VolumeDatabase.Instance.CreateEntity(data);
        }

        private void OnDisable()
        {
            VolumeDatabase.Instance.DestroyEntity(ref _entity);
        }

        private void Update()
        {
            if (dynamicVolume && transform.hasChanged)
            {
                UpdateMatrixData();
                ref var oldData = ref VolumeDatabase.Instance.GetDataRef(_entity);
                oldData = data;

                transform.hasChanged = false;
            }
        }

        private void OnDrawGizmos()
        {
            Gizmos.matrix = transform.localToWorldMatrix;
            Gizmos.color = Color.green;
            Gizmos.DrawWireCube(Vector3.zero, data.size);
        }
    }
}