using PrimeTween;
using TMPro;
using UnityEngine;

public class DamageNumberParticles : MonoBehaviour
{
	public TextMeshProUGUI TextMesh;
	public Camera TextCamera;
	private CanvasRenderer _textRenderer;
	private ParticleSystem _damageParticles;
	private RenderTexture _renderTexture;
	private MaterialPropertyBlock _particleMaterialProps;
	private ParticleSystemRenderer _particleRenderer;
	private int _lastDamageNumber = -1;

	void Awake()
	{
		_damageParticles = gameObject.GetComponent<ParticleSystem>();
		_particleRenderer = gameObject.GetComponent<ParticleSystemRenderer>();
		_textRenderer = TextMesh.canvasRenderer;
		_particleMaterialProps = new();
		_particleRenderer.GetPropertyBlock(_particleMaterialProps, 0);
		_renderTexture = new RenderTexture(256, 256, 24);
		TextCamera.targetTexture = _renderTexture;
	}

	void Start()
	{
		WaitForScene();
	}

	async void WaitForScene()
	{
		await Tween.Delay(1f);
		SetDamageNumber(100);
	}

	public void SpawnDamageNumber(int damageValue, Vector3 direction)
	{
		SetDamageNumber(damageValue);
		var particleVelocity = _damageParticles.velocityOverLifetime;
		particleVelocity.x = direction.x;
		particleVelocity.y = direction.y;
		particleVelocity.z = direction.z;
		_damageParticles.Emit(1);
	}

	void SetDamageNumber(int number)
	{
		if (_lastDamageNumber == number) return;
		TextMesh.text = number.ToString();

		TextCamera.enabled = true;
		TextCamera.Render();

		Texture2D texture2D = new(_renderTexture.width, _renderTexture.height);
		RenderTexture.active = _renderTexture;
		texture2D.ReadPixels(new Rect(0, 0, _renderTexture.width, _renderTexture.height), 0, 0);
		texture2D.Apply();

		_particleMaterialProps.SetTexture("_MainTex", texture2D);
		_particleRenderer.SetPropertyBlock(_particleMaterialProps);

		TextCamera.enabled = false;
		_lastDamageNumber = number;
	}




}