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

public class RawImageScript_SC : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler, IPointerMoveHandler
{
    //正常植株和病株对比面板
    public UI_PlantComparisonPanel rextualPanel;
    public RawImage targetRawImage;

    HighlightEffect _highlight = null;

    public void OnPointerEnter(PointerEventData eventData)
    {
    }

    public void OnPointerMove(PointerEventData eventData)
    {
        GameObject hoveredObject = eventData.pointerEnter;
        RawImage rawImage = this.GetComponent<RawImage>();
        // 步骤1：转换为RawImage局部坐标
        RectTransformUtility.ScreenPointToLocalPointInRectangle(
            targetRawImage.rectTransform,
            Input.mousePosition,
            null,
            out Vector2 localPos);

        Vector2 uv = CalculateUV(localPos);
        if (uv.x < 0 || uv.x > 1 || uv.y < 0 || uv.y > 1) return;

        Camera renderCamera = null;
        int layerMask = 0;
        if (hoveredObject.name == "高粱RawImage")
        {
            Debug.Log("我进高粱了");
            renderCamera = GameObject.Find("Camera_Normal").GetComponent<Camera>();
            layerMask = 1 << LayerMask.NameToLayer("Split_Normal");
            // 步骤3：生成射线
        }
        else if (hoveredObject.name == "玉米RawImage")
        {
            Debug.Log("我进玉米了");
            renderCamera = GameObject.Find("Camera_Disease").GetComponent<Camera>();
            layerMask = 1 << LayerMask.NameToLayer("Split_Disease");
        }
        else
        {
            renderCamera = Camera.main;
            layerMask = 1 << LayerMask.NameToLayer("Default");
        }
        Ray ray = renderCamera.ViewportPointToRay(uv);
        if (Physics.Raycast(ray, out RaycastHit hit,
            renderCamera.farClipPlane,
            layerMask))
        {
            Debug.Log($"选中物体：{hit.collider.name}", hit.collider.gameObject);
            if (_highlight != null)
            {
                _highlight.SetHighlighted(false);
                _highlight = null;
            }
            _highlight = hit.collider.gameObject.GetComponent<HighlightEffect>();
            if (_highlight != null)
            {
                _highlight.SetHighlighted(true);
                rextualPanel.showPlantPartOnRawImage(hit.collider.gameObject);
            }
        }
        else
        {
            if (_highlight != null)
            {
                _highlight.SetHighlighted(false);
                _highlight = null;
            }
        }
    }

    public void OnPointerExit(PointerEventData eventData)
    {
        GameObject hoveredObject = eventData.pointerEnter;
        if (hoveredObject.name == "正常高粱")
        {
            Debug.Log("我退出正常了");
        }
        else if (hoveredObject.name == "病株")
        {
            Debug.Log("我退出病株了");
        }
    }

    private Vector2 CalculateUV(Vector2 localPos)
    {
        Rect rect = targetRawImage.rectTransform.rect;

        // 处理不同锚点模式
        Vector2 pivot = targetRawImage.rectTransform.pivot;
        Vector2 offset = new Vector2(
            localPos.x + rect.width * pivot.x,
            localPos.y + rect.height * pivot.y
        );

        return new Vector2(
            offset.x / rect.width,
            offset.y / rect.height
        );
    }
}