using JetBrains.Annotations;
using System.Collections;
using System.Collections.Generic;
using Unity.VisualScripting;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;
using ZXKFramework;
namespace DongWuYiXue.DaoNiaoShu
{
    public class Drag : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler,IPointerEnterHandler,IPointerExitHandler
    {
        public enum Group
        {
            group1,
            group2,
            group3,
            group4
        }
        public string dragName;
        public Group group;
        [Header("是否拖拽")]
        public bool drag;
        [HideInInspector]
        public GameObject falseImage;
        [HideInInspector]
        public GameObject rightImage;
        [HideInInspector]
        public GameObject hoverImage;
        [HideInInspector]
        public GameObject dragImage;
        public Drag rightTarget;//正确答案
        [HideInInspector]
        public Drag yourTarget;//您的答案
        DragManager dragManager;
        [HideInInspector]
        public RectTransform rectTransform;
        private Vector3 startPos;
        private Vector2 offset;
        [HideInInspector]
        public bool right;
        private void Awake()
        {
            rectTransform = GetComponent<RectTransform>();
            startPos = rectTransform.localPosition;
            falseImage = transform.FindFirst("FalseImg");
            rightImage = transform.FindFirst("RightImg");
            hoverImage = transform.FindFirst("HoverImg");
            dragImage = transform.FindFirst("DragImg");
        }
        public void Init(DragManager dragManager)
        {
            this.dragManager = dragManager;
            ResetPos();
            right = false;
            falseImage.SetActive(false);
            rightImage.SetActive(false);
            hoverImage.SetActive(false);
            dragImage.SetActive(false);
            yourTarget = null;
        }

        // 开始拖拽时调用
        public void OnBeginDrag(PointerEventData eventData)
        {
            if (drag && !falseImage.activeSelf && !rightImage.activeSelf)
            {
                RectTransform rectTransform = transform as RectTransform;
                // 计算鼠标相对于 UI 元素的偏移量
                offset = rectTransform.anchoredPosition - eventData.position;
                dragManager.drag = this;
            }
        }

        // 拖拽过程中调用
        public void OnDrag(PointerEventData eventData)
        {
            if (drag && !falseImage.activeSelf && !rightImage.activeSelf)
            {
                dragImage.SetActive(true);
                hoverImage.SetActive(false);
                RectTransform rectTransform = transform as RectTransform;
                // 根据鼠标位置和偏移量更新 UI 元素的位置
                rectTransform.anchoredPosition = eventData.position + offset;
            }
        }

        public void OnEndDrag(PointerEventData eventData)
        {
            if (drag && !falseImage.activeSelf && !rightImage.activeSelf)
            {
                dragManager.DragEnd();
                dragImage.SetActive(false);
            }
        }
        public void ResetPos()
        {
            rectTransform.localPosition = startPos;
        }
        
        public void OnPointerEnter(PointerEventData eventData)
        {
            
            // 获取当前的 EventSystem
            EventSystem eventSystem = EventSystem.current;
            // 检查鼠标是否在 UI 上
            if (eventSystem.IsPointerOverGameObject())
            {
                if (!dragImage.activeSelf && yourTarget == null)//dragImage和hoverImage只能有一个显示
                {
                    hoverImage.SetActive(true);
                }
            }
        }
        public void OnPointerExit(PointerEventData eventData)
        {
            // 获取当前的 EventSystem
            EventSystem eventSystem = EventSystem.current;
            // 检查鼠标是否在 UI 上
            if (eventSystem.IsPointerOverGameObject())
            {
                hoverImage.SetActive(false);
            }
        }
    }
}