using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class DistanceMeasurement : MonoBehaviour
{
    public bool isPathCanBePlanned = false;//是否可以规划路径
    public LineRenderer lineRenderer; // 用于绘制路径的线段渲染器
    public Transform[] markers; // 存储所有标记点的数组
    public GameObject PosPrefab;
    public UnmannedAerialVehicleManage unmannedAerialVehicleManage;
    void Start()
    {
        lineRenderer.positionCount = 0;
    }

    void Update()
    {
        if (isPathCanBePlanned)
        {
            if (Input.GetMouseButtonDown(0)&& !IsPointerOverUI())
            {
                Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
                RaycastHit hit;
                if (Physics.Raycast(ray, out hit))
                {
                    AddMarker(hit.point);
                }
            }
            if (Input.GetMouseButtonDown(1) && !IsPointerOverUI())
            {
                ClearMarkers();
            }
        }
           
    }

    bool IsPointerOverUI()
    {
        // 检测当前鼠标位置是否在UI上
        return UnityEngine.EventSystems.EventSystem.current.IsPointerOverGameObject();
    }

    void AddMarker(Vector3 position)
    {
        // 创建一个新的游戏对象作为标记点
        GameObject go = Instantiate(PosPrefab);
        go.transform.position = position;

        // 将新的标记点添加到数组中
        if (markers == null)
        {
            markers = new Transform[] { go.transform };
        }
        else
        {
            Transform[] newMarkers = new Transform[markers.Length + 1];
            markers.CopyTo(newMarkers, 0);
            newMarkers[markers.Length] = go.transform;
            markers = newMarkers;
            unmannedAerialVehicleManage.positions.Enqueue(go.transform.position);
            go.transform.SetParent(transform);
        }

        // 根据新的标记点数组重新绘制路径
        DrawPath();
    }

    void DrawPath()
    {
        if (markers.Length < 2)
        {
            return; // 如果标记点不足两个，则不绘制路径
        }

        // 将所有路径点存储到列表中
        List<Vector3> pathPoints = new List<Vector3>();
        for (int i = 0; i < markers.Length; i++)
        {
            pathPoints.Add(markers[i].position);
        }

        // 绘制路径
        lineRenderer.positionCount = pathPoints.Count;
        lineRenderer.SetPositions(pathPoints.ToArray());
    }

    void ClearMarkers()
    {
        if (markers != null)
        {
            Transform[] newmarkers = new Transform[1];
            newmarkers[0] = markers[0];
            for (int i=1;i< markers.Length; i++)
            {
                Destroy(markers[i].gameObject);
            }
            markers = newmarkers;
            lineRenderer.positionCount = 0;
            unmannedAerialVehicleManage.positions.Clear();
        }
    }
}