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

public enum CLIENT_MOVE_TYPE
{
    Loop,
    PingPong,
}

public class ClientMove : MonoBehaviour
{

    public float _Speed;
    public List<Vector3> _MovePoses;
    public CLIENT_MOVE_TYPE _MoveType;
    public bool _MoveInverval = false;
    public float _MotionRot = 0;

    public void Start()
    {
        _TargetPosIdx = 0;
        _Closic = true;
        if (_MovePoses.Count < 3)
        {
            _MoveType = CLIENT_MOVE_TYPE.Loop;
        }
        transform.position = _MovePoses[_TargetPosIdx];
        GetNextPos();
    }

    public void Update()
    {
        MoveUpdate();
    }

    #region move

    private int _TargetPosIdx = 0;
    private bool _Closic = true;

    public void SetSpeed(float speedValue)
    {
        _Speed = speedValue;
    }

    public void GetNextPos()
    {
        switch (_MoveType)
        {
            case CLIENT_MOVE_TYPE.Loop:
                ++_TargetPosIdx;
                if (_TargetPosIdx == _MovePoses.Count)
                    _TargetPosIdx = 0;
                break;
            case CLIENT_MOVE_TYPE.PingPong:
                if (_Closic)
                {
                    ++_TargetPosIdx;
                    if (_TargetPosIdx == _MovePoses.Count)
                    {
                        _TargetPosIdx = _MovePoses.Count - 2;
                        _Closic = false;
                    }
                }
                else
                {
                    --_TargetPosIdx;
                    if (_TargetPosIdx == -1)
                    {
                        _TargetPosIdx = 1;
                        _Closic = true;
                    }
                }
                break;
        }
    }

    public void MoveUpdate()
    {
        if (_Speed == 0)
            return;

        transform.LookAt(_MovePoses[_TargetPosIdx]);
        if (_MotionRot != 0)
        {
            transform.rotation = Quaternion.Euler(transform.eulerAngles + new Vector3(0, _MotionRot, 0));
        }
        var speed = (_MovePoses[_TargetPosIdx] - transform.position).normalized * _Speed;
        var distance = Vector3.Distance(_MovePoses[_TargetPosIdx], transform.position);
        var moveDistance = _Speed * Time.deltaTime;
        if (moveDistance > distance)
        {
            transform.position = _MovePoses[_TargetPosIdx];
            GetNextPos();
            if (_MoveInverval)
            {
                _Speed = 0;
            }
        }
        else
        {
            transform.position += speed * Time.deltaTime;
        }
    }

    #endregion

}