using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;

public class DragItem : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IDragHandler
{


    [Header("鼠标按下事件")]
    public UnityEvent _Downevent;

    [Header("鼠标松开事件")]
    public UnityEvent _UpEvent;

    [Header("鼠标拖拽事件")]
    public UnityEvent _DragEvent;

    public float checkDistance = 60;


    private bool canDrag = false;
    private Vector3 tempPos;
    private Vector3 resetPos;

    private void OnEnable()
    {
        resetPos = transform.localPosition;

       // _UpEvent.AddListener(CheckDragAear);
    }

    public void OnDrag(PointerEventData eventData)
    {
        if (canDrag)
        {
            _DragEvent.Invoke();
            this.transform.position = Input.mousePosition;
        }
    }

    public void OnPointerDown(PointerEventData eventData)
    {
        canDrag = true;
        _Downevent.Invoke();
    }

    public void OnPointerUp(PointerEventData eventData)
    {
        canDrag = false;
        tempPos = transform.position;
        transform.localPosition = resetPos;
        CheckDragAear();
        _UpEvent.Invoke();
        //GameManagerForZhuanWan.Instance.StartTimeAction(0.25f, () => { });
        
    }


    private void CheckDragAear()
    {
        DragCheck[] checks = GameObject.FindObjectsOfType<DragCheck>();
        for (int i = 0; i < checks.Length; i++)
        {

            if (Vector2.Distance(this.tempPos, checks[i].transform.position) <= checkDistance)
            {

                if (checks[i].isMainAear)
                {
                    //检测是否已经放置过设备
                    if (!GameManagerForZhuanWan.Instance.CheckAearHaveItem(checks[i].gameObject.name))
                    {
                        string value = GameManagerForZhuanWan.Instance.mainAearTxt.text.ToString();
                        int num = int.Parse(value);
                        num++;
                        GameManagerForZhuanWan.Instance.mainAearTxt.text = num.ToString();

                        GameManagerForZhuanWan.Instance.ShowTip("已放置一处主要区域");
                    }

                    
                }
                else
                {
                    GameManagerForZhuanWan.Instance.ShowTip("已放置一处次要区域");
                }

                //放置
                checks[i].ShowItem();
            }

        }
    }

}