using UnityEngine;
using UnityEngine.UI;
using System.Collections.Generic;
using System;
using ZIM.Unity;
using System.Linq;

public class PointMarker : MonoBehaviour
{
    public Text instructionText; // 用于显示提示文字
    public Button undoButton;    // 撤回按钮
    public Button completeButton; // 完成按钮
    public bool bComplete = false;// 是否完成
    public GameObject markerPrefab; // 用于表示标记的UI元素，可能是一个小图标（如枪）

    // 新增父对象，用于存放标记的物体
    public Transform markerParent; // 标记物体的父对象（例如Canvas中的一个空物体）

    public Image[] hintImages; // 依次存放左上、右上、右下、左下四个提示图片

    private List<Vector2> markedPoints = new List<Vector2>();
    private string[] directions = { "左上", "右上", "右下", "左下" };
    private int currentPointIndex = 0; // 当前需要标记的点的索引
    private List<GameObject> markerObjects = new List<GameObject>(); // 记录标记物体

    [SerializeField] InfraredScreenPositioningView infraredScreenPositioningView;

    void Start()
    {
        if (AimHandler.ins) AimHandler.ins.OnCrossBtnEvent += OnRecordInfrared;

        UpdateInstruction();
        undoButton.onClick.AddListener(UndoLastPoint);
        completeButton.onClick.AddListener(CompletePoint); // 初始化时隐藏完成按钮
        bComplete = false;

        // 初始化时，显示第一个提示图片，其余隐藏
        ShowHintImage(0);
    }
    void OnDestroy()
    {
        if (AimHandler.ins) AimHandler.ins.OnCrossBtnEvent -= OnRecordInfrared;
    }

    void Update()
    {
        if (Input.GetKeyDown(KeyCode.Alpha6))
        {
            //Vector2 mousePosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
            //MarkPoint(mousePosition);
           // OnRecordInfrared();

            var mouse = Input.mousePosition;
            var u = mouse.x / Screen.width;
            var v = mouse.y / Screen.height;
            u = Math.Clamp(u, 0, 1);
            v = Math.Clamp(v, 0, 1);
            Vector2 pos = new Vector2(u * ScreenLocate.Main.getUVCTexture.width, v * ScreenLocate.Main.getUVCTexture.height);
            markedPoints.Add(pos);
            // 设置标记的位置
            MarkPoint(new Vector2(u, v).pixelToLocalPosition_AnchorCenter(new Vector2(1, 1), markerParent.GetComponent<RectTransform>().rect));
        }
    }

    /// <summary>
    /// 记录红外点
    /// </summary>
    public void OnRecordInfrared()
    {
       

        if (currentPointIndex >= 4) return;
        var location = ScreenLocate.Main.infraredSpotBuffer.FirstOrDefault()?.CameraLocation;
        if (location != null)
        {
            Vector2 localPosition = location.Value.pixelToLocalPosition_AnchorCenter(ScreenLocate.Main.CameraSize, infraredScreenPositioningView.Bg.rectTransform.rect);
            markedPoints.Add(localPosition);
            MarkPoint(localPosition);
        }
    }
    void MarkPoint(Vector2 point)
    {
        //markedPoints.Add(new Vector2(point.x * ScreenLocate.Main.getUVCTexture.width, point.y * ScreenLocate.Main.getUVCTexture.height));
        // 创建标记物体，并将其作为markerParent的子对象
        GameObject marker = Instantiate(markerPrefab, markerParent);
        marker.SetActive(true);
        marker.transform.localPosition = point;
        markerObjects.Add(marker);

        // 隐藏当前的提示图片，显示下一个提示图片
        currentPointIndex++;
        ShowHintImage(currentPointIndex);

        UpdateInstruction();

        // 如果已经标记了四个点，显示完成按钮
        if (currentPointIndex == 4)
        {
            instructionText.text = "标记完成!";
            bComplete = true;
        }
    }

    void UndoLastPoint()
    {
        if (markedPoints.Count > 0)
        {
            // 移除最后一个标记的点
            markedPoints.RemoveAt(markedPoints.Count - 1);

            // 删除最后一个标记的物体
            Destroy(markerObjects[markerObjects.Count - 1]);
            markerObjects.RemoveAt(markerObjects.Count - 1);

            // 回退到上一个提示图片
            currentPointIndex--;
            ShowHintImage(currentPointIndex);

            UpdateInstruction();
        }

        // 隐藏完成按钮
        bComplete = false;
    }

    void UpdateInstruction()
    {
        if (currentPointIndex < 4)
        {
            instructionText.text = "请标记: " + directions[currentPointIndex] + "角的点";
        }
    }

    // 显示当前需要的提示图片，并隐藏其余提示图片
    void ShowHintImage(int index)
    {
        for (int i = 0; i < hintImages.Length; i++)
        {
            if (i == index)
                hintImages[i].gameObject.SetActive(true);
            else
                hintImages[i].gameObject.SetActive(false);
        }
    }

    void CompletePoint() {
        if (!bComplete) {
            Debug.Log("未完成");
            //todo，加提示
            PopupMgr.ins.ShowTipTop(TextAutoLanguage2.GetTextByKey("Incomplete"));
            return;
        }
        //完成，下一步
        for (int i = 0; i < 4; i++)
        {
            int index = i;
            infraredScreenPositioningView.onManualNewPos(3 - index, markerObjects[index].transform.localPosition);
        }
        infraredScreenPositioningView.onManualToAutomatic();

        ////清空数据
        //currentPointIndex = 0;
        ////清空生成的数据
        //markerObjects.Clear();
        //foreach (Transform i in markerParent.transform)
        //    Destroy(i.gameObject);
    }

}