using F3Device.Screen;
using QFramework;
using QFramework.Example;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public class UIImageDrag_JiHe : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler
{
    RectTransform rect;
    Canvas canvas; // 用于坐标转换

    List<RaycastResult> raycastResults;
    public GameObject target;
    public Vector3 originPos;
    bool isOverTarget = false; // 是否在目标物体上结束拖拽
    bool isRight = false; // 是否放置正确

    void Awake()
    {
        rect = GetComponent<RectTransform>();
        canvas = GetComponentInParent<Canvas>();
        originPos = rect.anchoredPosition;
        raycastResults = new List<RaycastResult>();
    }

    // 只有在放置不正确时才允许开始拖拽
    public void OnBeginDrag(PointerEventData eventData)
    {
        if (!isRight)
        {
            // 确保拖拽时物体在最上层
            transform.SetAsLastSibling();
        }
        else
        {
            // 阻止事件继续传播
            eventData.Use();
        }
    }

    // 只有在放置不正确时才允许拖拽
    public void OnDrag(PointerEventData eventData)
    {
        if (!isRight)
        {
            rect.transform.position = Input.mousePosition;
        }
    }

    // 只有在放置不正确时才处理拖拽结束事件
    public void OnEndDrag(PointerEventData eventData)
    {
        if (isRight) return;

        var uiPanel = UIKit.GetPanel<UIImageSelectMap_JiHe>();
        if (uiPanel == null)
        {
            rect.anchoredPosition = originPos;
            return;
        }

        string targetObjName = uiPanel.Data.TargetObj;

        raycastResults.Clear();
        EventSystem.current.RaycastAll(eventData, raycastResults);

        target = null;
        foreach (var result in raycastResults)
        {
            if (result.gameObject.name == targetObjName)
            {
                target = result.gameObject;
                break;
            }
        }

        if (target != null)
        {
            var frame = target.transform.Find("Frame").gameObject;
            frame.GetComponent<Image>().color = Color.green;



            rect.parent = frame.gameObject.transform;
            rect.anchoredPosition =new Vector2(-15, 45);
            rect.sizeDelta = new Vector2(176.3376f, 142.2313f);
            isRight = true;
            Debug.Log("放置正确，禁用拖拽");

            // 禁用射线检测，防止再次被拖拽
            GraphicRaycaster graphicRaycaster = GetComponent<GraphicRaycaster>();
            if (graphicRaycaster != null)
            {
                graphicRaycaster.enabled = false;
            }

            // 或者禁用Image组件的raycastTarget
            Image image = GetComponent<Image>();
            if (image != null)
            {
                image.raycastTarget = false;
            }

            // 通知UI面板操作成功
           // uiPanel.OnDragSuccess();
        }
        else
        {
            rect.anchoredPosition = originPos;
        }

        isOverTarget = false;
        target = null;
    }
}