//--------------------------------------------------------
//    [Author]:           第二世界
//    [  Date ]:           Friday, September 15, 2017
//--------------------------------------------------------
using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using System;


namespace vnxbqy.UI
{

    public class NewItemGetBehaviour : MonoBehaviour
    {
        [SerializeField] ItemBehaviour m_ItemBehaviour;
        [SerializeField] UIAlphaTween m_AlphaTween;
        [SerializeField] ScaleTween m_ScaleTween;

        [SerializeField] float m_Duration = 1f;
        public float duration { get { return m_Duration; } }

        Vector3 targetPosition;
        Vector3 startPosition;
        Action endCallBack = null;

        float timer = 0f;
        float endTime = 0f;

        public void Begin(Item _item, Vector3 _from, Vector3 _to, Action _callBack)
        {
            startPosition = _from;
            targetPosition = _to;
            endTime = Time.time + duration;

            m_ItemBehaviour.SetItem(_item);

            this.SetActive(true);
            this.transform.localPosition = startPosition.SetZ(0);

            m_AlphaTween.Play();
            m_ScaleTween.Play();
            endCallBack = _callBack;
        }

        private void LateUpdate()
        {
            if (Time.time < endTime)
            {
                timer = duration - (endTime - Time.time);
                var t = timer / duration;
                this.transform.localPosition = Vector3.Lerp(startPosition, targetPosition, t);
            }
            else
            {
                this.SetActive(false);

                if (endCallBack != null)
                {
                    endCallBack();
                    endCallBack = null;
                }
            }

        }

    }

}