// ***********************************************************************
// Assembly         : Game
// Author           : Kimch
// Created          : 2021-11-19
// Description      :
// Last Modified By : 
// Last Modified On : 
// ***********************************************************************
// <copyright file= "ScreenTapFX" company="Kunpo"></copyright>
// <summary></summary>
// ***********************************************************************

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace G
{
	/// <summary>
	/// 类功能描述
	/// </summary>
	public class ScreenTapFX : MonoBehaviour
	{
		/// <summary>
		/// 屏幕特效原始资源
		/// </summary>
		public GameObject fxSample;

		/// <summary>
		/// 屏幕特效的生命时长，超过后会进行缓存
		/// </summary>
		public float fxLifeTime = 1.0f;

		/// <summary>
		/// 屏幕特效的容器（父对象）
		/// </summary>
		public RectTransform fxContainer;

		/// <summary>
		/// 屏幕特效渲染使用的相机
		/// </summary>
		public Camera fxRenderCamera;

		private Queue<GameObject> _fxPool = new Queue<GameObject>(10);
		private List<GameObject> _activatedFXList = new List<GameObject>();

		private void Awake()
		{
			if (fxSample == null)
			{
				//Debug.LogErrorFormat("没有找到屏幕特效");
				this.enabled = false;
			}
			else
			{
				fxSample.SetActive(false);
				_fxPool.Enqueue(fxSample);
			}
			fxRenderCamera = KUIRoot.RootCamera;
		}

		private void Update()
		{
			for (int i = _activatedFXList.Count - 1; i >= 0; --i)
			{
				GameObject fx = _activatedFXList[i];
				float fxTime = float.Parse(fx.name);
				if (Time.time - fxTime > fxLifeTime)
				{
					RecycleFX(fx);
					_activatedFXList.RemoveAt(i);
				}
			}

			if (Application.isMobilePlatform)
			{
				for (int i = 0; i < Input.touchCount; ++i)
				{
					Touch touch = Input.GetTouch(i);
					if (touch.phase == TouchPhase.Began)
					{
						PlayFX(touch.position);
					}
				}
			}
			else
			{
				if (Input.GetMouseButtonDown(0))
				{
					PlayFX(Input.mousePosition);
				}
			}
		}

		private void PlayFX(Vector2 tapPos)
		{
			GameObject fx = CreateFX();
			fx.name = Time.time.ToString();
			_activatedFXList.Add(fx);

			RectTransform fxRectTrans = fx.GetComponent<RectTransform>();
			Vector2 fxLocalPos;
			RectTransformUtility.ScreenPointToLocalPointInRectangle(fxContainer, tapPos, fxRenderCamera, out fxLocalPos);
			//fxRectTrans.SetParent(fxContainer, false);
			fxRectTrans.anchoredPosition3D = fxLocalPos;
			fx.SetActive(true);
		}

		private GameObject CreateFX()
		{
			GameObject newFX = null;
			if (_fxPool.Count > 0)
			{
				newFX = _fxPool.Dequeue();
			}
			else
			{
				newFX = Instantiate(fxSample, fxContainer);
			}
			return newFX;
		}

		private void RecycleFX(GameObject fx)
		{
			fx.SetActive(false);
			_fxPool.Enqueue(fx);
		}
	}
}