using UnityEngine;
using UnityEngine.UI;
using System.Collections.Generic;
using System;
using ZIM.Unity;
using System.Linq;
using o0InfraredLocate.ZIM;

public class PointMarker : MonoBehaviour
{
    //public Text instructionText; // 用于显示提示文字
    [Tooltip("标记页面标题提示")]
    [SerializeField] TextAutoLanguage2 instructionText;
    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

    Vector2 oldPoint = Vector2.zero;
    private List<Vector2> markedPoints = new List<Vector2>();
    // { "左上", "右上", "右下", "左下" }
    private string[] directions = { "TipTopLeft", "TipTopRight", "TipBottomRight", "TipBottomLeft" };
    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;

    [Tooltip("存在校准数据时候显示")]
    [SerializeField] ZIM.LineGenerator line;//开始显示屏幕线条


    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;
    }
    private float lastClickTime = 0f;
    private float doubleClickThreshold = 0.3f; // 双击间隔时间，单位：秒
    void Update()
    {
        if (Input.GetMouseButtonDown(0)) // 检测左键按下
        {
            float currentTime = Time.time;
            if (currentTime - lastClickTime <= doubleClickThreshold)
            {
                // 双击检测成功，执行触发逻辑
                if (currentPointIndex >= 4) return;

                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);
                oldPoint = new Vector2(u, v);
                // 设置标记的位置
                MarkPoint(new Vector2(u, v).pixelToLocalPosition_AnchorCenter(new Vector2(1, 1), markerParent.GetComponent<RectTransform>().rect));
            }
            lastClickTime = currentTime; // 更新上一次点击时间
        }
        //#if UNITY_EDITOR
        //if (Input.GetKeyDown(KeyCode.Alpha6) || Input.GetMouseButtonDown(1))
        //{
        //    //Vector2 mousePosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
        //    //MarkPoint(mousePosition);
        //    // OnRecordInfrared();
        //    if (currentPointIndex >= 4) return;
        //    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));
        //}
        //#endif
    }
    /// <summary>
    /// 记录红外点
    /// </summary>
    public void OnRecordInfrared()
    {
        if (currentPointIndex >= 4) return;
        var location = ScreenLocate.Main.infraredSpotBuffer.FirstOrDefault()?.CameraLocation;
        if (location != null)
        {
            oldPoint = location.Value;
            Vector2 localPosition = location.Value.pixelToLocalPosition_AnchorCenter(ScreenLocate.Main.CameraSize, infraredScreenPositioningView.Bg.rectTransform.rect);
            //markedPoints.Add(localPosition);
            MarkPoint(localPosition);
        }
    }
    void MarkPoint(Vector2 point)
    {
        if (!infraredScreenPositioningView.IsPointInMaskLine(point)) {
            Debug.Log("不在梯形内部！");
            instructionText.SetTextKey("TipMarkerError");
            return;
        }
        // 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);
        //绘制连线
        markedPoints.Add(point);
        UpdateLine();

        // 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)
        {
            Vector2[] points = { 
                markerObjects[0].transform.localPosition,
                markerObjects[1].transform.localPosition,
                markerObjects[2].transform.localPosition, 
                markerObjects[3].transform.localPosition, 
            };
            bool result = infraredScreenPositioningView.IsValidQuadrilateral(points);
            Debug.Log(result ? "是有效的四边形" : "不是有效的四边形");
            if (result)
            {
                instructionText.SetTextKey("TipMarkComplete");
                //PopupMgr.ins.ShowTipTop(TextAutoLanguage2.GetTextByKey("TipMarkComplete"));
                bComplete = true;
            }
            else {
                //不是有效是四边形时候，回退 一个
                //instructionText.SetTextKey("TipMarkerError");
                PopupMgr.ins.ShowTipTop(TextAutoLanguage2.GetTextByKey("TipQuadError"));
                UndoLastPoint();
            }
        }
    }

    void UndoLastPoint()
    {
        if (currentPointIndex > 0)
        {
            // 移除最后一个标记的点
            markedPoints.RemoveAt(markedPoints.Count - 1);
            UpdateLine();
            // 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;
    }
    /// <summary>
    /// 移除全部标记，选择自动和半自动数据界面返回时候调用
    /// </summary>
    public void UndoAllPoints()
    {
        // 移除所有标记物体
        foreach (var marker in markerObjects)
        {
            Destroy(marker);
        }
        markerObjects.Clear();

        markedPoints.Clear();
        UpdateLine();
        // 重置索引
        currentPointIndex = 0;

        // 更新提示图片和说明
        ShowHintImage(currentPointIndex);
        UpdateInstruction();

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

    void UpdateLine() {
        if (line.gameObject.activeSelf) {
            RectTransform rectTransform = markerParent as RectTransform;
            Vector2 pivot = rectTransform.pivot; // 获取父物体的 pivot 值
            Vector2 texSize = rectTransform.rect.size;
            line.Points = InfraredDemo._ins.ConvertPointsToCoordinates(markedPoints.ToArray(), texSize, pivot);
        }
    }

    void UpdateInstruction()
    {
        if (currentPointIndex < 4)
        {
            instructionText.textFormatArgs = new object[] { TextAutoLanguage2.GetTextByKey(directions[currentPointIndex]) };
            instructionText.SetTextKey("TipMiddle");
        }
    }

    // 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);
        }
    }
    /// <summary>
    /// 如果没有数据时候，可能需要隐藏渲染
    /// </summary>
    /// <param name="bShow"></param>
    public void ShowHintImageParent(bool bShow)
    {
        for (int i = 0; i < hintImages.Length; i++)
        {
            hintImages[i].transform.parent.gameObject.SetActive(bShow);
        }
    }
    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.onFinishManualToAutomatic();

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

}