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

public class MissionitemEffectTween : MonoBehaviour {

    public Image _parentBG;
    private RectTransform _bgRect;
    private void OnEnable()
    {
        this.gameObject.transform.localPosition = Vector3.zero;

        if (_parentBG == null)
            _parentBG = GetComponentInParent<Image>();

        if (_bgRect == null)
            _bgRect = _parentBG.GetComponent<RectTransform>();


        _pathCountIndex = 0;
        StartMove();
    }

    private List<Vector3> pathList = new List<Vector3>();
    private int _pathCountIndex = 0;  //判断当前要取哪个点
    public void StartMove()
    {
        Hashtable args = new Hashtable();

        args.Add("looptype", "none");
        args.Add("easeType", iTween.EaseType.easeOutQuad);

        pathList.Clear();
        var pos1 = Vector3.zero;
        pathList.Add(pos1);
        var pos2 = new Vector3(_bgRect.sizeDelta.x, 0, 0);
        pathList.Add(pos2);
        var pos3 = new Vector3(_bgRect.sizeDelta.x, -_bgRect.sizeDelta.y, 0);
        pathList.Add(pos3);
        var pos4 = new Vector3(0, -_bgRect.sizeDelta.y, 0);
        pathList.Add(pos4);

        args.Add("islocal", true);
        args.Add("position", pathList[_pathCountIndex % 4]);
        _pathCountIndex %= 4;
        _pathCountIndex += 1;  //自加一次

        args.Add("speed", 100.0f);
        args.Add("oncomplete", "OnPathEnd"); //递归？
        iTween.MoveTo(gameObject, args);
    }

    //每个点结束的时候取下个点
    public void OnPathEnd()
    {
        iTween.Stop(this.gameObject);
        StartMove();
    }
}