//**********************************************//
//作者:#AUTHOR#
//日期:#DATE#
//简述:#DESCRIPTION#
//*********************************************//
using UnityEngine;
using System.Collections;
using Thousandto.Core.Base;
using System;

namespace Thousandto.Plugins.Common
{
    /// <summary>
    /// 类ScrolMoveEffect说明
    /// </summary>
    public class ScrollMoveEffect
    {
        #region //私有变量
        private int _moveSpeed = 400;                                  //滚动默认速度
        private float _endScrolPos = 0.0f;                             //滑动列表滑动到目标点位置（上下滚动对应Y，左右滚动对应X）
        private float _originPos = 0.0f;                               //滑动列表初始位置（上下滚动对应Y，左右滚动对应X）
        private float _scrolOffset = 30.0f;                            //滑动列表偏移量
        private float _aginOffset = 10.0f;                             //二次反弹
        private float _cellLengh = 0.0f;                               //滚动一格的距离
        private float _cellDis = 0.0f;                                 //滚动格子的间距(一定要是SetScrol函数第二个参数的宽或者高)
        private float _initDis = 0.0f;                                 //滑动列表第一个元素初始的（高/宽）
        private bool _isBack = false;
        private bool _isDown = false;
        private bool _isAgin = false;
        private bool _isRight = false;
        private MoveType _type = MoveType.Ver;                         //默认垂直方向移动
        private Transform _scrolTrans = null;
        private Transform _disTrans = null;                            //滑动列表滚动是防止玩家操作
        private UIScrollView  _scrol = null;                           //需要移动的ScrolView
        #endregion   

        #region//公共属性
        public float EndScrolPos
        {
            set
            {
                _endScrolPos = value;
            }
        }
        #endregion

        #region//公共接口
        //设置滚动参数
        /// <summary>
        /// 
        /// </summary>
        /// <param scrollView="trans"></param>
        /// <param 遮罩自行添加不添加传（null）="disTrans"></param>
        /// <param 需要移动的单位图片="spr"></param>
        /// <param 单位图片之间的距离="dis"></param>
        /// <param 水平/垂直="type"></param>
        /// <param 第一个图片元素偏移="initDis"></param>
        public void SetScrol( Transform trans , Transform disTrans, UISprite spr, float dis, int type, float initDis = 0.0f )
        {
            if( trans != null )
            {
                _scrolTrans = trans;
                _scrol = UnityUtils.RequireComponent<UIScrollView>( _scrolTrans.gameObject );
                _cellDis = dis;
                _initDis = initDis;
            }
            if( spr != null )
            {
                if( type == ( int )MoveType.Ver )
                {
                    _cellLengh = spr.height;
                    _originPos = _scrolTrans.localPosition.y;
                }
                else
                {
                    _cellLengh = spr.width;
                    _originPos = _scrolTrans.localPosition.x;
                    _type = MoveType.Hor;
                }
            }
            _disTrans = disTrans;
        }
        //
        /// <summary>
        /// 开始滚动
        /// </summary>
        /// <param 移动几个单位="count"></param>
        /// <param 是否是第一次移动="isFirst"></param>
        public void StarMoveEffect( int count = 0, bool isFirst = false )
        {
            float pos = 0.0f;
            if( _type == MoveType.Hor )
            {
                pos = _scrolTrans.localPosition.x;
                SetHorEndPos( count, isFirst, pos );
            }
            else
            {
                pos = _scrolTrans.localPosition.y;
                SetVerEndPos( count, isFirst, pos );
            }
            if( isFirst )
            {
                _scrol.ResetPosition();
            }
            if( _disTrans )
            {
                _disTrans.gameObject.SetActive( true );
            }
        }
        public void Update()
        {
            //更新滑动列表位置
            if( _endScrolPos != 0.0f )
            {
                if( _type == MoveType.Ver )
                {
                    UpdateVer();
                }
                else
                {
                    UpdateHor();
                }
            }
        }
        #endregion    

        #region//回调函数
        #endregion    

        #region//私有函数
        /// <summary>
        /// 
        /// </summary>
        /// <param 移动几个单位="count"></param>
        /// <param 是否是第一次移动="isFirst"></param>
        /// <param 滑动列表滚动绝对距离="pos"></param>
        private void SetVerEndPos( int count, bool isFirst, float pos )
        {
            float dis = 0.0f;
            if( isFirst )
            {
                _endScrolPos = count * ( _cellLengh + _cellDis - _initDis );
                //保证第一个动画
                if( _endScrolPos == 0.0f )
                {
                    _endScrolPos = 0.001f;
                }
            }
            else
            {
                if( _originPos > pos )
                {
                    dis = Math.Abs( pos - _originPos );
                    _endScrolPos = ( _cellLengh + _cellDis - _initDis ) + dis;
                }
                else if( _originPos == pos )
                {
                    _endScrolPos = _cellLengh - _initDis;
                }
                else if( _originPos < pos )
                {
                    _isDown = true;
                    dis = Math.Abs( pos - _originPos );
                    _endScrolPos = dis - ( _cellLengh + _cellDis - _initDis );
                }
            }
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param 移动几个单位="count"></param>
        /// <param 是否是第一次移动="isFirst"></param>
        /// <param 滑动列表滚动绝对距离="pos"></param>
        private void SetHorEndPos( int count, bool isFirst, float pos )
        {
            float dis = 0.0f;
            if( isFirst )
            {
                _endScrolPos = count * ( _cellLengh + _cellDis - _initDis );
                //保证第一个动画
                if( _endScrolPos == 0.0f )
                {
                    _endScrolPos = 0.001f;
                }
            }
            else
            {
                if( _originPos > pos )
                {
                    dis = Math.Abs( pos - _originPos );
                    _endScrolPos = dis - ( _cellLengh + _cellDis - _initDis );
                    _isRight = true;
                }
                else if( _originPos == pos )
                {
                    _endScrolPos = _cellLengh - _initDis;
                }
                else if( _originPos < pos )
                {
                    dis = Math.Abs( pos - _originPos );
                    _endScrolPos = dis + ( _cellLengh + _cellDis - _initDis );
                }
            }
        }
        //垂直更新
        private void UpdateVer()
        {
            if( _scrol )
            {
                if( !_isBack )
                {
                    if( !_isDown )
                    {
                        _scrol.MoveRelative( new Vector3( 0, Time.deltaTime * _moveSpeed, 0 ) );
                    }
                    else
                    {
                        _scrol.MoveRelative( new Vector3( 0, -Time.deltaTime * _moveSpeed, 0 ) );
                    }
                    _endScrolPos -= Time.deltaTime * _moveSpeed;
                    if( _moveSpeed < 600 )
                    {
                        _moveSpeed += 20;
                    }
                    if( _endScrolPos == 0.0f )
                    {
                        _endScrolPos = -0.0001f;
                    }
                    if( _endScrolPos < -_scrolOffset )
                    {
                        _isBack = true;
                        _moveSpeed = 200;
                    }
                }
                else
                {
                    //反弹
                    if( _endScrolPos >= 0 && !_isAgin )
                    {
                        _scrol.MoveRelative( new Vector3( 0, _endScrolPos, 0 ) );
                        _endScrolPos = _aginOffset;
                        _moveSpeed = 30;
                        _isAgin = true;
                    }
                    else if( _endScrolPos < 0 && !_isAgin )
                    {
                        if( _moveSpeed > 400 )
                        {
                            _moveSpeed -= 15;
                        }
                        if( _moveSpeed < 100 )
                        {
                            _moveSpeed = 100;
                        }
                        if( !_isDown )
                        {
                            _scrol.MoveRelative( new Vector3( 0, -Time.deltaTime * _moveSpeed, 0 ) );
                        }
                        else
                        {
                            _scrol.MoveRelative( new Vector3( 0, Time.deltaTime * _moveSpeed, 0 ) );
                        }
                        _endScrolPos += Time.deltaTime * _moveSpeed;
                    }
                    else
                    {
                        //二次反弹
                        if( _endScrolPos <= 0 )
                        {
                            _scrol.MoveRelative( new Vector3( 0, _endScrolPos, 0 ) );
                            _isAgin = false;
                            _isBack = false;
                            _endScrolPos = 0.0f;
                            _moveSpeed = 400;
                            if( _isDown )
                            {
                                _isDown = false;
                            }
                            if( _scrolTrans )
                            {
                                _originPos = _scrolTrans.localPosition.y;
                            }
                            if( _disTrans )
                            {
                                _disTrans.gameObject.SetActive( false );
                            }
                        }
                        else
                        {
                            if( _moveSpeed > 0 )
                            {
                                _moveSpeed -= 1;
                            }
                            if( _moveSpeed <= 15 )
                            {
                                _moveSpeed = 15;
                            }
                            if( !_isDown )
                            {
                                _scrol.MoveRelative( new Vector3( 0, Time.deltaTime * _moveSpeed, 0 ) );
                            }
                            else
                            {
                                _scrol.MoveRelative( new Vector3( 0, -Time.deltaTime * _moveSpeed, 0 ) );
                            }
                            _endScrolPos -= Time.deltaTime * _moveSpeed;
                        }
                    }
                }
            }
        }
        //水平更新
        private void UpdateHor()
        {
            if( _scrol )
            {
                if( !_isBack )
                {
                    if( !_isRight )
                    {
                        _scrol.MoveRelative( new Vector3( -Time.deltaTime * _moveSpeed, 0, 0 ) );
                    }
                    else
                    {
                        _scrol.MoveRelative( new Vector3( Time.deltaTime * _moveSpeed, 0, 0 ) );
                    }
                    _endScrolPos -= Time.deltaTime * _moveSpeed;
                    if( _moveSpeed < 600 )
                    {
                        _moveSpeed += 20;
                    }
                    if( _endScrolPos == 0.0f )
                    {
                        _endScrolPos = -0.0001f;
                    }
                    if( _endScrolPos < -_scrolOffset )
                    {
                        _isBack = true;
                        _moveSpeed = 200;
                    }
                }
                else
                {
                    //反弹
                    if( _endScrolPos >= 0 && !_isAgin )
                    {
                        _scrol.MoveRelative( new Vector3( _endScrolPos, 0, 0 ) );
                        _endScrolPos = _aginOffset;
                        _moveSpeed = 30;
                        _isAgin = true;
                    }
                    else if( _endScrolPos < 0 && !_isAgin )
                    {
                        if( _moveSpeed > 400 )
                        {
                            _moveSpeed -= 15;
                        }
                        if( _moveSpeed < 100 )
                        {
                            _moveSpeed = 100;
                        }
                        if( !_isRight )
                        {
                            _scrol.MoveRelative( new Vector3( Time.deltaTime * _moveSpeed, 0, 0 ) );
                        }
                        else
                        {
                            _scrol.MoveRelative( new Vector3( -Time.deltaTime * _moveSpeed, 0, 0 ) );
                        }
                        _endScrolPos += Time.deltaTime * _moveSpeed;
                    }
                    else
                    {
                        //二次反弹
                        if( _endScrolPos <= 0 )
                        {
                            _scrol.MoveRelative( new Vector3( _endScrolPos, 0, 0 ) );
                            _isAgin = false;
                            _isBack = false;
                            _endScrolPos = 0.0f;
                            _moveSpeed = 400;
                            if( _isRight )
                            {
                                _isRight = false;
                            }
                            if( _scrolTrans )
                            {
                                _originPos = _scrolTrans.localPosition.x;
                            }
                            if( _disTrans )
                            {
                                _disTrans.gameObject.SetActive( false );
                            }
                        }
                        else
                        {
                            if( _moveSpeed > 0 )
                            {
                                _moveSpeed -= 1;
                            }
                            if( _moveSpeed <= 15 )
                            {
                                _moveSpeed = 15;
                            }
                            if( !_isRight )
                            {
                                _scrol.MoveRelative( new Vector3( -Time.deltaTime * _moveSpeed, 0, 0 ) );
                            }
                            else
                            {
                                _scrol.MoveRelative( new Vector3( Time.deltaTime * _moveSpeed, 0, 0 ) );
                            }
                            _endScrolPos -= Time.deltaTime * _moveSpeed;
                        }
                    }
                }
            }
        }
        #endregion    
        private enum MoveType
        {
            Hor = 0,                 //水平方向移动
            Ver = 1,                 //垂直方向移动
        }
    }
}