using UnityEngine;

namespace Thousandto.Launcher.ExternalLibs
{
    /// <summary>
    /// 子节点网格的脚本
    /// 此脚本只保存了,RuntimeMesh的一个对象
    /// 可以被其他脚本用于来进行顶点修改
    /// </summary>
    public class VertexAnimateBaseScript : MonoBehaviour
    {
        #region //私有变量
        [SerializeField]
        private ChildMeshDataScript _script = null;

        //记录回调函数
        private SetNewVertexDelegate _setNewVertexHandler = null;

        //记录当前帧增加的顶点值分量
        private Vector3 _datV = Vector3.zero;

        //开始进行动画
        private bool _playing = false;
        #endregion

        #region//属性

        //顶点的增加分量
        public Vector3 DatVectex
        {
            get { return _datV; }
            set { _datV = value; }
        }

        //是否正在播放
        public bool Playing
        {
            get { return _playing; }            
        }
        #endregion

        #region//公共函数
        public void SetRunTimeScript(ChildMeshDataScript script)
        {
            _script = script;
        }
        #endregion

        #region //重写继承MonoBehaviour方法
        //开始
        private void Start()
        {
            OnStart();
        }
        //更新
        private void Update()
        {
            if (_playing )
            {  
                RefreshVertex();
            }
 
        }

        private void OnDestroy()
        {
        }

        //刷新顶点
        private void RefreshVertex()
        {
            if (_setNewVertexHandler != null && _script.ChildMeshInfo != null && _script.enabled)
            {
                if (OnRefreshVertexBefore(ref _datV))
                {
                    _script.ChildMeshInfo.RefreshVertex(_setNewVertexHandler);
                    OnRefreshVertexAfter(ref _datV);
                }
            }
        }
        #endregion

        #region//虚函数,有子类进行调用

        protected virtual void OnStart()
        {
            _setNewVertexHandler = OnSetNewVertexHandler;    
        }

        //刷新顶点之前这里对顶点的每个分量做增量结算
        protected virtual bool OnRefreshVertexBefore(ref Vector3 datVertex)
        {
            datVertex.Set(0, 0, 0);
            return false;             
        }

        //刷新顶点完成后做其他处理
        protected virtual void OnRefreshVertexAfter(ref Vector3 datVertex)
        {
            
        }

        //设置新顶点的Handler处理
        protected virtual void OnSetNewVertexHandler(ref Vector3 newV, ref Vector3 oldV, ref Color vcolor)
        {
            newV.x = oldV.x + _datV.x * vcolor.a;
            newV.y = oldV.y + _datV.y * vcolor.a;
            newV.z = oldV.z + _datV.z * vcolor.a;
        }

        //播放
        protected virtual void Play()
        {
            _playing = true;
        }

        //停止
        protected virtual void Stop() 
        {            
            _playing = false;
            _datV.Set(0, 0, 0);
            if(_script.ChildMeshInfo != null && _script.enabled)
                _script.ChildMeshInfo.RefreshVertex(_setNewVertexHandler);
        }

        #endregion
    }
}