using System.Collections;
using UnityEngine;
using UnityEngine.Rendering;

namespace UnityEngine.Rendering
{
    [CurrentPipelineHelpURL("Volumes")]
    [ExecuteAlways]
    [AddComponentMenu("Miscellaneous/Volume Weight Animator")]
    public class VolumeWeightAnimator : MonoBehaviour
    {
        [SerializeField]
        private Volume m_Volume;

        [SerializeField]
        private float m_AnimationDuration = 5.0f;

        [SerializeField]
        private AnimationCurve m_WeightCurve = AnimationCurve.Linear(0, 0, 1, 1);

        [SerializeField]
        private float m_Speed = 1.0f;

        private bool wasEnabled = false;

        private void Start()
        {
            if (m_Volume != null)
            {
                m_Volume.weight = 0;
                wasEnabled = m_Volume.enabled;
            }
            else
            {
                Debug.LogWarning("Volume is not assigned.");
            }
        }

        private void Update()
        {
            if (m_Volume != null)
            {
                if (m_Volume.enabled && !wasEnabled)
                {
                    // Volume został włączony, uruchamiamy animację
                    StartCoroutine(AnimateWeight());
                }
                wasEnabled = m_Volume.enabled;
            }
        }

        private IEnumerator AnimateWeight()
        {
            float elapsedTime = 0f;
            m_Volume.weight = 1; // Ustawienie wagi na 1 przy włączaniu Volume

            while (elapsedTime < m_AnimationDuration)
            {
                float t = elapsedTime / m_AnimationDuration;
                float curveValue = m_WeightCurve.Evaluate(t);
                m_Volume.weight = curveValue; // Używamy bezpośrednio wartości z krzywej

                elapsedTime += Time.deltaTime * m_Speed;
                yield return null;
            }

            // Po zakończeniu animacji wyłączamy Volume
            m_Volume.enabled = false;
        }
    }
}