using System.Collections;
using UnityEngine;

public class DissolveHelper : MonoBehaviour
{
	[SerializeField] ParticleSystem _dissolveParticlesPrefab = default;
	[SerializeField] float _dissolveDuration = 1f;

	private MeshRenderer _renderer;
	private ParticleSystem _particules;

	private MaterialPropertyBlock _materialPropertyBlock;

	[ContextMenu("Trigger Dissolve")]
	public void TriggerDissolve()
	{
		if (_materialPropertyBlock == null)
		{
			_materialPropertyBlock = new MaterialPropertyBlock();
		}
		InitParticleSystem();
		StartCoroutine(DissolveCoroutine());
	}

	[ContextMenu("Reset Dissolve")]
	private void ResetDissolve()
	{
		_materialPropertyBlock.SetFloat("_Dissolve", 0);
		_renderer.SetPropertyBlock(_materialPropertyBlock);
	}

	private void InitParticleSystem()
	{
		_particules = GameObject.Instantiate(_dissolveParticlesPrefab, transform);

		_renderer = GetComponent<MeshRenderer>();
		ParticleSystem.ShapeModule shapeModule = _particules.shape;
		shapeModule.meshRenderer = _renderer;
		shapeModule.enabled = true;

		ParticleSystem.MainModule mainModule = _particules.main;
		mainModule.duration = _dissolveDuration;
	}

	public IEnumerator DissolveCoroutine()
	{
		float normalizedDeltaTime = 0;

		_particules.Play();

		while (normalizedDeltaTime < _dissolveDuration)
		{
			normalizedDeltaTime += Time.deltaTime;
			float remappedValue = VFXUtil.RemapValue(normalizedDeltaTime, 0, _dissolveDuration, 0, 1);
			_materialPropertyBlock.SetFloat("_Dissolve", remappedValue);
			_renderer.SetPropertyBlock(_materialPropertyBlock);

			yield return null;
		}
		GameObject.Destroy(_particules.gameObject);
	}
}