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

public class ExamFlowManager : MonoBehaviour
{
    private const int StepCount = 7;
    private const string ManMubanName = "manMuban";
    private const string ManInjuryName = "manInjury";

    private readonly int[] _stepScores = { 6, 22, 11, 11, 11, 22, 17 };
    private readonly bool[] _answered = new bool[StepCount];
    private readonly bool[] _correct = new bool[StepCount];
    private readonly int[] _earned = new int[StepCount];
    private readonly string[] _feedback = new string[StepCount];

    private readonly HashSet<string> _placedPings = new HashSet<string>();
    private readonly HashSet<string> _wrappedPings = new HashSet<string>();
    private readonly HashSet<SplintObjectClickHandler> _clickedSplintPlanks = new HashSet<SplintObjectClickHandler>();

    private Transform _dialogueBubble;
    private GameObject _gradeResult;
    private GameObject _endPanel;
    private GameObject _manMuban;
    private GameObject _manInjury;
    private Button _dialogueYesButton;
    private Button _dialogueBackButton;
    private Text _gradeContent;
    private Text _gradeScoreText;
    private Font _cachedChineseFont;
    private PingClickHandler[] _splintPings;
    private SplintObjectClickHandler _splintBodyPad;
    private SplintObjectClickHandler[] _splintPlanks;
    private int _currentStep;
    private bool _examActive;
    private bool _waitingForPoint2;
    private bool _waitingForShose;
    private bool _waitingForWrapClicks;
    private bool _splintBodyClicked;

    private bool IsSplintExam
    {
        get
        {
            return GameManager.Instance != null &&
                   GameManager.Instance.CurrentFixationMethod == FixationMethod.SplintFixation;
        }
    }

    private void Awake()
    {
        AutoBind();
    }

    private void Start()
    {
        AutoBind();
        BindButtons();
        EnsureToggleGroups();
        HideAllPanels();
    }

    private void Update()
    {
        bool shouldRun = GameManager.Instance != null &&
                         GameManager.Instance.CurrentMode == ExperimentMode.Exam &&
                         IsExperimentPageVisible();

        if (!shouldRun && _examActive)
        {
            ResetExamState(false);
        }
    }

    public void BeginExam()
    {
        if (GameManager.Instance == null ||
            GameManager.Instance.CurrentMode != ExperimentMode.Exam ||
            !IsExperimentPageVisible())
        {
            ResetExamState(false);
            return;
        }

        AutoBind();
        BindButtons();
        EnsureToggleGroups();
        ResetExamState(true);
        _examActive = true;
        _waitingForPoint2 = true;

        if (GameManager.Instance != null)
        {
            GameManager.Instance.InitExamRecord(StepCount);
        }

        ForceHideExamOnlyOutlines();
        MoveWomanToExamPoint();
        ConfigureExamModelState();
        ShowStep(1);
        Debug.Log("[ExamFlow] 考核模式流程启动: " + GameManager.Instance.CurrentFixationMethod);
    }

    public void StopExam()
    {
        ResetExamState(false);
    }

    public void ShowStep(int stepNumber)
    {
        AutoBind();
        _currentStep = Mathf.Clamp(stepNumber, 1, StepCount);

        if (_dialogueBubble == null) return;
        _dialogueBubble.gameObject.SetActive(true);
        EnsureStepPanelsDoNotBlockButtons();

        for (int i = 0; i < _dialogueBubble.childCount; i++)
        {
            Transform child = _dialogueBubble.GetChild(i);
            if (child.name.StartsWith("step"))
            {
                child.gameObject.SetActive(child.name == "step" + _currentStep);
            }
        }

        ApplyStepText(_currentStep);
        if (_currentStep == 3 || _currentStep == 7)
        {
            ResetStepToggles(_currentStep);
        }

        ShowTip(GetExamTipText(_currentStep));

        Debug.Log("[ExamFlow] 显示 step" + _currentStep);
    }

    public void OnObjectClicked(Component clicked)
    {
        if (!_examActive || clicked == null) return;

        if (clicked is Point2ClickHandler)
        {
            if (_waitingForPoint2 && clicked.name == "point2")
            {
                _waitingForPoint2 = false;
                RecordStep(1, true, "已按要求完成前置操作起始步骤。");
                ShowTip("伤情评估已完成。下一步：阅读弹窗提示，准备完成前置处理。");
                StartCoroutine(ShowStepDelayed(2, 1f));
            }
            return;
        }

        if (clicked is ShoseClickHandler)
        {
            if (_waitingForShose || _currentStep <= 2)
            {
                _waitingForShose = false;
                RecordStep(2, true, IsSplintExam ? "已完成夹板固定前置处理。" : "已完成下肢固定前置处理。");
                ShowTip(IsSplintExam ? "夹板固定前置处理完成。下一步：选择固定带宽度。" : "下肢固定前置处理完成。下一步：选择绑带宽度。");
                StartCoroutine(ShowStepDelayed(3, 1f));
            }
            return;
        }

        var ping = clicked as PingClickHandler;
        if (ping != null)
        {
            if (IsSplintExam)
            {
                HandleSplintPingClicked(ping);
                return;
            }

            bool isWrapClick = ping.chanraoObject != null && ping.chanraoObject.activeSelf;
            if (isWrapClick)
            {
                _wrappedPings.Add(ping.name);
                Debug.Log("[ExamFlow] 系带点击 " + _wrappedPings.Count + "/4: " + ping.name);

                if (_waitingForWrapClicks && _wrappedPings.Count >= 4)
                {
                    _waitingForWrapClicks = false;
                RecordStep(5, true, "已按由远端到近端的顺序完成系带。");
                    ShowTip("系带顺序已完成。下一步：阅读打结位置判断题。");
                    ShowStep(6);
                }
            }
            else
            {
                _placedPings.Add(ping.name);
                Debug.Log("[ExamFlow] 放带点击 " + _placedPings.Count + "/4: " + ping.name);
            }
            return;
        }

        var splintObject = clicked as SplintObjectClickHandler;
        if (splintObject != null)
        {
            if (IsSplintExam)
            {
                HandleSplintObjectClicked(splintObject);
            }
            return;
        }

        if (clicked is ChanraoTuibuHandler)
        {
            if (!_answered[3])
            {
                RecordStep(4, _placedPings.Count >= 4, _placedPings.Count >= 4
                    ? "已按要求完成四条绑带摆放。"
                    : "绑带尚未全部摆放完成。");
            }

            _waitingForWrapClicks = true;
            ShowTip("环绕固定带已显示。下一步：依次点击 4 个蓝色绑带点完成系带固定。");
            ShowStep(5);
        }
    }

    private void HandleSplintPingClicked(PingClickHandler ping)
    {
        if (!IsSplintPing(ping)) return;

        bool isFinalFixClick = ping.chanraoObject != null && ping.chanraoObject.activeSelf;
        if (isFinalFixClick)
        {
            _wrappedPings.Add(ping.name);
            Debug.Log("[ExamFlow] 夹板固定点击 " + _wrappedPings.Count + "/4: " + ping.name);

            if (_waitingForWrapClicks && _wrappedPings.Count >= 4)
            {
                _waitingForWrapClicks = false;
                RecordStep(6, true, "已按由远端到近端的顺序完成夹板固定。");
                ShowTip("夹板系带固定已完成。下一步：选择固定后末梢观察位置。");
                ShowStep(7);
            }
            return;
        }

        _placedPings.Add(ping.name);
        Debug.Log("[ExamFlow] 夹板绑带摆放 " + _placedPings.Count + "/4: " + ping.name);

        if (_placedPings.Count >= 4 && !_answered[3])
        {
            RecordStep(4, true, "已按由远端到近端的顺序预置四条绑带。");
            ShowTip("四条固定带已预置。下一步：阅读弹窗，准备放置衬垫和夹板。");
            ShowStep(5);
        }
    }

    private void HandleSplintObjectClicked(SplintObjectClickHandler splintObject)
    {
        if (splintObject == null) return;

        if (splintObject == _splintBodyPad)
        {
            _splintBodyClicked = true;
            ShowSplintPlankTargets();
            Debug.Log("[ExamFlow] 已放置夹板衬垫 Body.001");
            ShowTip("衬垫已放置。下一步：依次点击两块木板蓝色边框，放置伤肢两侧夹板。");
            return;
        }

        if (!_splintBodyClicked) return;

        _clickedSplintPlanks.Add(splintObject);
        Debug.Log("[ExamFlow] 已放置夹板 " + _clickedSplintPlanks.Count + "/2: " + splintObject.name);

        if (_clickedSplintPlanks.Count >= 2 && !_answered[4])
        {
            RecordStep(5, true, "已先放置衬垫，再完成伤肢两侧夹板放置。");
            ShowTip("两侧夹板已放置。下一步：阅读弹窗，准备按顺序系带固定。");
            ShowStep(6);
        }
    }

    private IEnumerator ShowStepDelayed(int stepNumber, float delay)
    {
        yield return new WaitForSeconds(delay);
        ShowStep(stepNumber);
    }

    private void OnDialogueYesClicked()
    {
        if (!_examActive)
        {
            HideDialogue();
            return;
        }

        switch (_currentStep)
        {
            case 1:
                HideDialogue();
                _waitingForPoint2 = true;
                ShowTip("请点击伤员大腿附近，完成伤情评估。");
                break;
            case 2:
                HideDialogue();
                _waitingForShose = true;
                ShowTip("请点击伤侧鞋子，完成脱鞋和前置处理。");
                break;
            case 3:
                RecordStep(3, GetSelectedToggleIndex(3) == 1, "正确答案：10cm。");
                ShowStep(4);
                if (IsSplintExam) ActivateFirstSplintPing();
                else ActivateFirstPing();
                ShowTip(IsSplintExam
                    ? "请由脚踝向大腿依次点击 4 个蓝色绑带点，预置固定带。"
                    : "请由脚踝向大腿依次点击 4 个蓝色绑带点，摆放绑带。");
                break;
            case 4:
                HideDialogue();
                ShowTip(IsSplintExam
                    ? "请继续由远端向近端点击蓝色绑带点，完成 4 条固定带预置。"
                    : "请继续由远端向近端点击蓝色绑带点，完成 4 条绑带摆放。");
                break;
            case 5:
                HideDialogue();
                if (IsSplintExam)
                {
                    ShowSplintBodyTarget();
                    ShowTip("请点击 Body.001 蓝色边框，先放置夹板衬垫。");
                }
                else
                {
                    _waitingForWrapClicks = true;
                    ShowTip("请依次点击蓝色绑带点，按由远端到近端顺序完成系带。");
                }
                break;
            case 6:
                if (IsSplintExam)
                {
                    HideDialogue();
                    _waitingForWrapClicks = true;
                    EnableSplintFinalPingStage();
                    ShowTip("请由脚踝向大腿依次点击 4 个蓝色固定点，完成夹板系带固定。");
                }
                else
                {
                    RecordStep(6, false, "错误操作：在受伤腿一侧打结。正确做法是在未受伤腿位置打结。");
                    ShowStep(7);
                }
                break;
            case 7:
                RecordStep(7, GetSelectedToggleIndex(7) == 1, "正确答案：足背。");
                ShowTip("考核答题完成，正在生成成绩汇总。");
                ShowGradeResult();
                break;
            default:
                HideDialogue();
                break;
        }
    }

    private void ShowGradeResult()
    {
        AutoBind();
        BindResultButtons();
        BindEndPanelButtons();
        HideDialogue();
        int totalScore;
        string gradeContent = BuildGradeContent(out totalScore);
        if (_gradeResult != null) _gradeResult.SetActive(true);
        if (_gradeContent != null)
        {
            ApplyGradeTextStyle(_gradeContent);
            _gradeContent.text = gradeContent;
        }
        if (_gradeScoreText != null) _gradeScoreText.text = totalScore.ToString();
        RefreshGradeContentLayout();
    }

    private string BuildGradeContent(out int total)
    {
        total = 0;
        System.Text.StringBuilder sb = new System.Text.StringBuilder();
        sb.AppendLine("考核结果汇总");
        sb.AppendLine();

        for (int i = 0; i < StepCount; i++)
        {
            total += _earned[i];
            bool answered = _answered[i];
            bool correct = answered && _correct[i];

            sb.AppendFormat("考核点{0}（{1}分）：{2}", i + 1, _stepScores[i], correct ? "正确" : "错误");
            if (!answered) sb.Append("（未完成）");
            sb.AppendLine();
            sb.AppendLine("题目：" + GetQuestionText(i + 1));
            sb.AppendLine("答案：" + GetAnswerText(i + 1));
            sb.AppendFormat("得分：{0}/{1}", _earned[i], _stepScores[i]);
            sb.AppendLine();

            if (!string.IsNullOrEmpty(_feedback[i]) && (!correct || i == 5))
            {
                sb.AppendLine("说明：" + _feedback[i]);
            }

            sb.AppendLine();
        }

        sb.AppendFormat("最终得分：{0}/100", total);
        return sb.ToString();
    }

    private void RecordStep(int oneBasedStep, bool isCorrect, string feedback)
    {
        int index = oneBasedStep - 1;
        if (index < 0 || index >= StepCount || _answered[index]) return;

        _answered[index] = true;
        _correct[index] = isCorrect;
        _earned[index] = isCorrect ? _stepScores[index] : 0;
        _feedback[index] = feedback;

        if (GameManager.Instance != null)
        {
            GameManager.Instance.RecordExamResult(index, _stepScores[index], isCorrect ? 1f : 0f, feedback);
        }
    }

    private void ActivateFirstPing()
    {
        PingClickHandler firstHandler = null;
        foreach (var ping in Resources.FindObjectsOfTypeAll<PingClickHandler>())
        {
            if (ping == null || !ping.gameObject.scene.IsValid()) continue;
            if (ping.name == "ping.004" || ping.pingIndex == 0)
            {
                firstHandler = ping;
                break;
            }
        }

        if (firstHandler != null)
        {
            firstHandler.gameObject.SetActive(true);
            firstHandler.ResetState(true);
        }
    }

    private void ActivateFirstSplintPing()
    {
        ConfigureSplintObjects();
        PingClickHandler firstHandler = GetSplintPingByIndex(0);
        if (firstHandler == null) return;

        firstHandler.gameObject.SetActive(true);
        firstHandler.ResetState(true);
    }

    private void ConfigureExamModelState()
    {
        if (IsSplintExam)
        {
            ConfigureSplintObjects();
            if (_manInjury != null) _manInjury.SetActive(false);
            if (_manMuban != null) _manMuban.SetActive(true);
            HideSplintObjects();
        }
        else
        {
            if (_manMuban == null) _manMuban = FindSceneObject(ManMubanName);
            if (_manMuban != null) _manMuban.SetActive(false);
            if (_manInjury == null) _manInjury = FindSceneObject(ManInjuryName);
            if (_manInjury != null) _manInjury.SetActive(true);
        }
    }

    private void ConfigureSplintObjects()
    {
        _manMuban = FindSceneObject(ManMubanName);
        _manInjury = FindSceneObject(ManInjuryName);
        if (_manMuban == null) return;

        ConfigureSplintPings();
        ConfigureSplintBodyPad();
        ConfigureSplintPlanks();
    }

    private void ConfigureSplintPings()
    {
        if (_manMuban == null) return;

        _splintPings = new PingClickHandler[4];
        string[] guideNames = { "ping.001", "ping.002", "ping.003", "ping.004" };
        string[] targetNames = { "Armature/Bottoms.001", "ping.005", "ping.006", "ping.007" };

        for (int i = 0; i < guideNames.Length; i++)
        {
            Transform guide = _manMuban.transform.Find(guideNames[i]);
            Transform target = _manMuban.transform.Find(targetNames[i]);
            if (guide == null || target == null) continue;

            PingClickHandler handler = guide.GetComponent<PingClickHandler>();
            if (handler == null) handler = guide.gameObject.AddComponent<PingClickHandler>();

            handler.pingIndex = i;
            handler.chanraoObject = target.gameObject;
            handler.nextPing = null;
            _splintPings[i] = handler;

            target.gameObject.SetActive(false);
            guide.gameObject.SetActive(false);
        }

        for (int i = 0; i < _splintPings.Length - 1; i++)
        {
            if (_splintPings[i] != null && _splintPings[i + 1] != null)
                _splintPings[i].nextPing = _splintPings[i + 1].gameObject;
        }
    }

    private void ConfigureSplintBodyPad()
    {
        if (_manMuban == null) return;

        Transform body = _manMuban.transform.Find("Body.001");
        if (body == null) return;

        _splintBodyPad = body.GetComponent<SplintObjectClickHandler>();
        if (_splintBodyPad == null) _splintBodyPad = body.gameObject.AddComponent<SplintObjectClickHandler>();
        body.gameObject.SetActive(false);
    }

    private void ConfigureSplintPlanks()
    {
        if (_manMuban == null) return;

        string[] plankNames = { "Wood plank - warm oak board", "Wood plank - warm oak board.001" };
        List<SplintObjectClickHandler> planks = new List<SplintObjectClickHandler>();

        for (int i = 0; i < plankNames.Length; i++)
        {
            Transform plank = _manMuban.transform.Find(plankNames[i]);
            if (plank == null) continue;

            SplintObjectClickHandler handler = plank.GetComponent<SplintObjectClickHandler>();
            if (handler == null) handler = plank.gameObject.AddComponent<SplintObjectClickHandler>();
            planks.Add(handler);
            plank.gameObject.SetActive(false);
        }

        _splintPlanks = planks.ToArray();
    }

    private void HideSplintObjects()
    {
        if (_manMuban == null) return;

        string[] names =
        {
            "ping.001", "ping.002", "ping.003", "ping.004",
            "ping.005", "ping.006", "ping.007",
            "Body.001",
            "Wood plank - warm oak board", "Wood plank - warm oak board.001"
        };

        for (int i = 0; i < names.Length; i++)
        {
            Transform target = _manMuban.transform.Find(names[i]);
            if (target != null) target.gameObject.SetActive(false);
        }

        Transform bottoms = _manMuban.transform.Find("Armature/Bottoms.001");
        if (bottoms != null) bottoms.gameObject.SetActive(false);
    }

    private void ShowSplintBodyTarget()
    {
        if (_splintBodyPad == null) ConfigureSplintBodyPad();
        if (_splintBodyPad == null) return;

        _splintBodyPad.gameObject.SetActive(true);
        _splintBodyPad.ResetState(true);
    }

    private void ShowSplintPlankTargets()
    {
        if (_splintPlanks == null || _splintPlanks.Length == 0) ConfigureSplintPlanks();

        for (int i = 0; i < _splintPlanks.Length; i++)
        {
            if (_splintPlanks[i] == null) continue;
            _splintPlanks[i].gameObject.SetActive(true);
            _splintPlanks[i].ResetState(true);
        }
    }

    private void EnableSplintFinalPingStage()
    {
        if (_splintPings == null || _splintPings.Length == 0) ConfigureSplintPings();

        for (int i = 0; i < _splintPings.Length; i++)
        {
            if (_splintPings[i] == null) continue;
            _splintPings[i].gameObject.SetActive(true);
            _splintPings[i].ReEnableBorder();
        }
    }

    private PingClickHandler GetSplintPingByIndex(int index)
    {
        if (_splintPings == null || _splintPings.Length == 0) ConfigureSplintPings();
        if (_splintPings == null || index < 0 || index >= _splintPings.Length) return null;
        return _splintPings[index];
    }

    private bool IsSplintPing(PingClickHandler ping)
    {
        if (ping == null || _splintPings == null) return false;

        for (int i = 0; i < _splintPings.Length; i++)
        {
            if (_splintPings[i] == ping) return true;
        }

        return false;
    }

    private void AutoBind()
    {
        Transform canvas = FindSceneObject("Canvas")?.transform;
        if (canvas == null) return;

        if (_dialogueBubble == null) _dialogueBubble = canvas.Find("DialogueBubble");
        if (_gradeResult == null)
        {
            Transform t = canvas.Find("GradeResult");
            if (t != null) _gradeResult = t.gameObject;
        }
        if (_endPanel == null)
        {
            Transform t = canvas.Find("EndPanel");
            if (t != null) _endPanel = t.gameObject;
        }

        if (_dialogueBubble != null)
        {
            _dialogueYesButton = _dialogueBubble.Find("BtnYes")?.GetComponent<Button>();
            _dialogueBackButton = _dialogueBubble.Find("BtnBack")?.GetComponent<Button>();
        }

        if (_gradeResult != null)
        {
            Transform grade = _gradeResult.transform.Find("Grade");
            if (grade != null) _gradeScoreText = grade.GetComponent<Text>();

            _gradeContent = FindGradeDetailText(_gradeResult.transform);
        }
    }

    private Text FindGradeDetailText(Transform root)
    {
        if (root == null) return null;

        Transform scrollView = root.Find("Scroll View");
        if (scrollView != null)
        {
            Transform viewportContent = scrollView.Find("Viewport/Content");
            Text text = EnsureTextOnContent(viewportContent);
            if (text != null) return text;

            text = FindTextByName(scrollView, "Content");
            if (text != null) return text;

            text = FindTextByName(scrollView, "content");
            if (text != null) return text;
        }

        Transform legacyContent = root.Find("content");
        return legacyContent != null ? legacyContent.GetComponent<Text>() : null;
    }

    private Text EnsureTextOnContent(Transform content)
    {
        if (content == null) return null;

        HideLegacyContentTextChildren(content);

        Text text = content.GetComponent<Text>();

        if (text == null)
        {
            text = content.gameObject.AddComponent<Text>();
        }

        ApplyGradeTextStyle(text);

        RectTransform rect = content.GetComponent<RectTransform>();
        if (rect != null)
        {
            rect.anchorMin = new Vector2(0f, 1f);
            rect.anchorMax = new Vector2(1f, 1f);
            rect.pivot = new Vector2(0f, 1f);
            rect.anchoredPosition = Vector2.zero;
        }

        ContentSizeFitter fitter = content.GetComponent<ContentSizeFitter>();
        if (fitter == null) fitter = content.gameObject.AddComponent<ContentSizeFitter>();
        fitter.horizontalFit = ContentSizeFitter.FitMode.Unconstrained;
        fitter.verticalFit = ContentSizeFitter.FitMode.PreferredSize;

        return text;
    }

    private void HideLegacyContentTextChildren(Transform content)
    {
        if (content == null) return;

        for (int i = 0; i < content.childCount; i++)
        {
            Transform child = content.GetChild(i);
            if (child == null) continue;

            if (child.GetComponent<Text>() != null || child.GetComponentInChildren<Text>(true) != null)
            {
                child.gameObject.SetActive(false);
            }
        }
    }

    private void ApplyGradeTextStyle(Text text)
    {
        if (text == null) return;

        Font chineseFont = ResolveChineseUiFont(text);
        if (chineseFont != null) text.font = chineseFont;

        text.fontSize = 22;
        text.color = new Color(0.12f, 0.12f, 0.12f, 1f);
        text.alignment = TextAnchor.UpperLeft;
        text.horizontalOverflow = HorizontalWrapMode.Wrap;
        text.verticalOverflow = VerticalWrapMode.Overflow;
        text.supportRichText = false;
        text.raycastTarget = false;

        RectTransform rect = text.GetComponent<RectTransform>();
        if (rect != null)
        {
            rect.anchorMin = new Vector2(0f, 1f);
            rect.anchorMax = new Vector2(1f, 1f);
            rect.pivot = new Vector2(0f, 1f);
            rect.anchoredPosition = Vector2.zero;
            rect.offsetMin = new Vector2(0f, rect.offsetMin.y);
            rect.offsetMax = new Vector2(0f, rect.offsetMax.y);
        }
    }

    private Font ResolveChineseUiFont(Text exclude)
    {
        if (_cachedChineseFont != null) return _cachedChineseFont;

        Text[] texts = Resources.FindObjectsOfTypeAll<Text>();
        for (int i = 0; i < texts.Length; i++)
        {
            Text candidate = texts[i];
            if (candidate == null || candidate == exclude || candidate.font == null) continue;
            if (!candidate.gameObject.scene.IsValid()) continue;
            if (!ContainsChinese(candidate.text)) continue;

            _cachedChineseFont = candidate.font;
            return _cachedChineseFont;
        }

        return exclude != null ? exclude.font : null;
    }

    private bool ContainsChinese(string value)
    {
        if (string.IsNullOrEmpty(value)) return false;

        for (int i = 0; i < value.Length; i++)
        {
            char ch = value[i];
            if (ch >= '\u4e00' && ch <= '\u9fff') return true;
        }

        return false;
    }

    private Text FindTextByName(Transform root, string objectName)
    {
        if (root == null) return null;

        Text direct = root.name == objectName ? root.GetComponent<Text>() : null;
        if (direct != null) return direct;

        for (int i = 0; i < root.childCount; i++)
        {
            Text childText = FindTextByName(root.GetChild(i), objectName);
            if (childText != null) return childText;
        }

        return null;
    }

    private void BindButtons()
    {
        if (_dialogueYesButton != null)
        {
            _dialogueYesButton.onClick.RemoveAllListeners();
            _dialogueYesButton.interactable = true;
            _dialogueYesButton.enabled = true;
            _dialogueYesButton.onClick.AddListener(OnDialogueYesClicked);
        }

        if (_dialogueBackButton != null)
        {
            _dialogueBackButton.onClick.RemoveAllListeners();
            _dialogueBackButton.interactable = true;
            _dialogueBackButton.enabled = true;
            _dialogueBackButton.onClick.AddListener(HideDialogue);
        }

        BindResultButtons();
        BindEndPanelButtons();
    }

    private void BindResultButtons()
    {
        if (_gradeResult == null) return;

        Button yes = _gradeResult.transform.Find("BtnYes")?.GetComponent<Button>();
        if (yes != null)
        {
            yes.onClick.RemoveAllListeners();
            yes.interactable = true;
            yes.enabled = true;
            yes.onClick.AddListener(ShowEndPanelFromGrade);
        }

        Button back = _gradeResult.transform.Find("BtnBack")?.GetComponent<Button>();
        if (back != null)
        {
            back.onClick.RemoveAllListeners();
            back.interactable = true;
            back.enabled = true;
            back.onClick.AddListener(() => _gradeResult.SetActive(false));
        }
    }

    private void BindEndPanelButtons()
    {
        if (_endPanel == null) return;

        Button yes = _endPanel.transform.Find("BtnYes")?.GetComponent<Button>();
        if (yes != null)
        {
            yes.onClick.RemoveAllListeners();
            yes.interactable = true;
            yes.enabled = true;
            yes.onClick.AddListener(ReturnToHome);
        }
    }

    private void ShowEndPanelFromGrade()
    {
        AutoBind();
        if (_gradeResult != null) _gradeResult.SetActive(false);
        if (_endPanel != null)
        {
            _endPanel.SetActive(true);
            BindEndPanelButtons();
        }
    }

    private void ReturnToHome()
    {
        PageController page = FindObjectOfType<PageController>();
        if (page != null) page.ReturnToHome();
    }

    private void ApplyStepText(int stepNumber)
    {
        Transform step = _dialogueBubble?.Find("step" + stepNumber);
        if (step == null) return;

        Text title = FindStepText(step, "Title");
        Text content = FindStepText(step, "content");

        if (title != null)
        {
            ApplyQuestionTextStyle(title, true);
            title.text = "考核点" + ToChineseNumber(stepNumber);
        }
        if (content != null)
        {
            ApplyQuestionTextStyle(content, false);
            content.text = GetQuestionText(stepNumber);
        }

        if (stepNumber == 3)
        {
            ConfigureStepToggles(stepNumber);
            SetToggleLabel(step, "Toggle1", "5cm");
            SetToggleLabel(step, "Toggle2", "10cm");
            SetToggleLabel(step, "Toggle3", "20cm");
        }
        else if (stepNumber == 7)
        {
            ConfigureStepToggles(stepNumber);
            SetToggleLabel(step, "Toggle1", "足底");
            SetToggleLabel(step, "Toggle2", "足背");
        }
    }

    private string GetQuestionText(int stepNumber)
    {
        if (IsSplintExam)
        {
            switch (stepNumber)
            {
                case 1: return "操作题：点击确定后，请先完成现场安全确认、伤员沟通与伤情初步评估。";
                case 2: return "操作题：点击确定后，请继续完成夹板固定前置处理，包括脱除伤侧鞋袜、暴露并观察伤肢。";
                case 3: return "单选题：请选择夹板固定时较合适的固定带宽度。";
                case 4: return "操作题：点击确定后，请按照由远心端到近心端的顺序依次预置四条固定带。";
                case 5: return "操作题：点击确定后，请先放置衬垫保护骨突，再将两块夹板分别放在伤肢两侧。";
                case 6: return "操作题：点击确定后，请按正确顺序收紧并固定四条绑带，注意从远端向近端依次固定。";
                case 7: return "单选题：固定完成后，应优先观察哪个位置判断足部末梢血运与感觉？";
                default: return "";
            }
        }

        switch (stepNumber)
        {
            case 1: return "操作题：点击确定后，请先评估现场环境和伤员情况，确认可以开展救护。";
            case 2: return "操作题：点击确定后，请按顺序完成下肢固定前置处理，包括取出用品、脱除伤侧鞋子并保护踝关节。";
            case 3: return "单选题：请选择下肢固定时较合适的带子宽度。";
            case 4: return "操作题：点击确定后，请按由远心端到近心端的顺序依次摆放绑带。";
            case 5: return "操作题：点击确定后，请按正确顺序进行系带固定。";
            case 6: return "判断题：本次演示中带子打结在受伤腿一侧，请判断该操作是否正确。";
            case 7: return "单选题：踝关节处打结应选择哪个位置？";
            default: return "";
        }
    }

    private string GetExamTipText(int stepNumber)
    {
        if (IsSplintExam)
        {
            switch (stepNumber)
            {
                case 1: return "阅读考核点一，点击确定后开始伤情评估。";
                case 2: return "阅读考核点二，点击确定后完成脱鞋和伤肢暴露观察。";
                case 3: return "请选择固定带宽度，选择后点击确定。";
                case 4: return "点击确定后，按由脚踝到大腿的顺序预置 4 条固定带。";
                case 5: return "点击确定后，先放置衬垫，再放置两侧夹板。";
                case 6: return "点击确定后，由远端到近端依次完成 4 个固定点。";
                case 7: return "请选择固定完成后用于观察末梢血运的位置。";
                default: return "";
            }
        }

        switch (stepNumber)
        {
            case 1: return "阅读考核点一，点击确定后开始评估伤情。";
            case 2: return "阅读考核点二，点击确定后完成脱鞋和下肢固定前置处理。";
            case 3: return "请选择绑带宽度，选择后点击确定。";
            case 4: return "点击确定后，按由脚踝到大腿的顺序摆放 4 条绑带。";
            case 5: return "点击确定后，继续由远端到近端完成系带固定。";
            case 6: return "阅读打结位置判断题，点击确定后进入下一题。";
            case 7: return "请选择踝关节打结位置，选择后点击确定查看成绩。";
            default: return "";
        }
    }

    private string GetAnswerText(int stepNumber)
    {
        if (IsSplintExam)
        {
            switch (stepNumber)
            {
                case 1: return "确认现场安全，表明救护身份，询问并评估伤员，判断疑似骨折后准备夹板固定用品。";
                case 2: return "轻柔暴露伤肢，脱除伤侧鞋袜，观察肿胀畸形和末梢情况，操作中避免牵拉骨折端。";
                case 3: return "10cm。宽度过窄易产生局部压迫，过宽则不利于稳定贴合。";
                case 4: return "从脚踝等远心端开始，向膝部和大腿近心端依次预置四条固定带。";
                case 5: return "先在骨突和空隙处放置衬垫，再将两块夹板置于伤肢两侧，夹板长度应跨过骨折上下相邻关节。";
                case 6: return "先固定远端脚踝，再由远心端到近心端逐条固定，松紧以能固定且不影响血运为准。";
                case 7: return "足背。足背动脉、皮肤颜色、温度和感觉可用于判断固定后末梢循环情况。";
                default: return "";
            }
        }

        switch (stepNumber)
        {
            case 1: return "先评估现场安全和伤员意识、疼痛、畸形等情况，取得配合后再开始固定。";
            case 2: return "取出急救用品，脱除伤侧鞋子，摆正伤肢并保护踝关节，避免加重损伤。";
            case 3: return "10cm。带子过窄容易压迫皮肤，过宽会影响固定贴合。";
            case 4: return "由远心端（脚踝）向近心端（大腿根部）依次摆放绑带。";
            case 5: return "先固定远端脚踝，再依次向小腿、膝部、大腿近端收紧捆绑。";
            case 6: return "错误。带结应打在未受伤腿一侧，避免压迫伤肢，也便于观察和后续拆除。";
            case 7: return "足背。踝关节处应避免把结打在足底受压位置。";
            default: return "";
        }
    }

    private void ShowTip(string text)
    {
        UIManager uiManager = FindObjectOfType<UIManager>();
        if (uiManager != null) uiManager.ShowTip(text);
    }

    private string ToChineseNumber(int number)
    {
        string[] values = { "", "一", "二", "三", "四", "五", "六", "七" };
        return number >= 0 && number < values.Length ? values[number] : number.ToString();
    }

    private void SetToggleLabel(Transform root, string toggleName, string label)
    {
        Transform toggle = FindToggleTransform(root, toggleName);
        if (toggle == null) return;

        Text text = FindStepText(toggle, "Label");
        if (text == null)
        {
            Text[] labels = toggle.GetComponentsInChildren<Text>(true);
            if (labels.Length > 0) text = labels[0];
        }

        if (text != null)
        {
            ApplyOptionTextStyle(text);
            text.text = label;
        }
    }

    private Text FindStepText(Transform root, string objectName)
    {
        if (root == null) return null;

        Text direct = root.name.Equals(objectName, System.StringComparison.OrdinalIgnoreCase)
            ? root.GetComponent<Text>()
            : null;
        if (direct != null) return direct;

        for (int i = 0; i < root.childCount; i++)
        {
            Text child = FindStepText(root.GetChild(i), objectName);
            if (child != null) return child;
        }

        return null;
    }

    private Transform FindToggleTransform(Transform root, string toggleName)
    {
        if (root == null) return null;

        Transform direct = root.Find(toggleName);
        if (direct != null) return direct;

        Toggle[] toggles = GetOrderedToggles(root);
        for (int i = 0; i < toggles.Length; i++)
        {
            if (toggles[i] != null && toggles[i].name == toggleName)
                return toggles[i].transform;
        }

        int index = GetTrailingNumber(toggleName) - 1;
        if (index >= 0 && index < toggles.Length && toggles[index] != null)
            return toggles[index].transform;

        return null;
    }

    private int GetTrailingNumber(string value)
    {
        if (string.IsNullOrEmpty(value)) return 0;

        int multiplier = 1;
        int result = 0;
        bool found = false;
        for (int i = value.Length - 1; i >= 0; i--)
        {
            char ch = value[i];
            if (ch < '0' || ch > '9') break;
            found = true;
            result += (ch - '0') * multiplier;
            multiplier *= 10;
        }

        return found ? result : 0;
    }

    private void ApplyQuestionTextStyle(Text text, bool isTitle)
    {
        if (text == null) return;

        Font chineseFont = ResolveChineseUiFont(text);
        if (chineseFont != null) text.font = chineseFont;

        text.fontSize = isTitle ? Mathf.Max(text.fontSize, 30) : Mathf.Max(text.fontSize, 26);
        text.color = isTitle ? Color.white : Color.black;
        text.horizontalOverflow = HorizontalWrapMode.Wrap;
        text.verticalOverflow = VerticalWrapMode.Overflow;
    }

    private void ApplyOptionTextStyle(Text text)
    {
        if (text == null) return;

        Font chineseFont = ResolveChineseUiFont(text);
        if (chineseFont != null) text.font = chineseFont;

        text.fontSize = Mathf.Max(text.fontSize, 24);
        text.color = new Color(0.18f, 0.18f, 0.18f, 1f);
        text.horizontalOverflow = HorizontalWrapMode.Overflow;
        text.verticalOverflow = VerticalWrapMode.Overflow;
    }

    private int GetSelectedToggleIndex(int stepNumber)
    {
        Transform step = _dialogueBubble?.Find("step" + stepNumber);
        if (step == null) return -1;

        Toggle[] toggles = GetOrderedToggles(step);
        for (int i = 0; i < toggles.Length; i++)
        {
            if (toggles[i].isOn) return i;
        }

        return -1;
    }

    private void ResetStepToggles(int stepNumber)
    {
        Transform step = _dialogueBubble?.Find("step" + stepNumber);
        if (step == null) return;

        Toggle[] toggles = GetOrderedToggles(step);
        for (int i = 0; i < toggles.Length; i++)
        {
            toggles[i].SetIsOnWithoutNotify(false);
        }
    }

    private void EnsureToggleGroups()
    {
        EnsureToggleGroup(3);
        EnsureToggleGroup(7);
    }

    private void EnsureStepPanelsDoNotBlockButtons()
    {
        if (_dialogueBubble == null) return;

        for (int i = 0; i < _dialogueBubble.childCount; i++)
        {
            Transform child = _dialogueBubble.GetChild(i);
            if (!child.name.StartsWith("step")) continue;

            Graphic[] graphics = child.GetComponentsInChildren<Graphic>(true);
            for (int j = 0; j < graphics.Length; j++)
            {
                Graphic graphic = graphics[j];
                if (graphic == null) continue;
                if (graphic.GetComponentInParent<Toggle>() != null) continue;
                graphic.raycastTarget = false;
            }
        }
    }

    private void RefreshGradeContentLayout()
    {
        if (_gradeContent == null) return;

        RectTransform textRect = _gradeContent.GetComponent<RectTransform>();
        if (textRect != null)
        {
            float preferredHeight = _gradeContent.preferredHeight + 32f;
            textRect.sizeDelta = new Vector2(textRect.sizeDelta.x, Mathf.Max(preferredHeight, 400f));
        }

        ScrollRect scrollRect = _gradeResult != null ? _gradeResult.GetComponentInChildren<ScrollRect>(true) : null;
        if (scrollRect != null)
        {
            Canvas.ForceUpdateCanvases();
            scrollRect.verticalNormalizedPosition = 1f;
            LayoutRebuilder.ForceRebuildLayoutImmediate(scrollRect.content);
        }
    }

    private void EnsureToggleGroup(int stepNumber)
    {
        Transform step = _dialogueBubble?.Find("step" + stepNumber);
        if (step == null) return;

        ConfigureStepToggles(stepNumber);
    }

    private void ConfigureStepToggles(int stepNumber)
    {
        Transform step = _dialogueBubble?.Find("step" + stepNumber);
        if (step == null) return;

        ToggleGroup group = step.GetComponent<ToggleGroup>();
        if (group == null) group = step.gameObject.AddComponent<ToggleGroup>();
        group.allowSwitchOff = true;

        Toggle[] toggles = GetOrderedToggles(step);
        for (int i = 0; i < toggles.Length; i++)
        {
            int selectedIndex = i;
            Toggle toggle = toggles[i];
            if (toggle == null) continue;

            toggle.enabled = true;
            toggle.interactable = true;
            toggle.group = group;
            EnsureToggleRaycastArea(toggle);

            toggle.onValueChanged.RemoveAllListeners();
            toggle.onValueChanged.AddListener((isOn) =>
            {
                if (!isOn) return;

                Toggle[] currentToggles = GetOrderedToggles(step);
                for (int j = 0; j < currentToggles.Length; j++)
                {
                    if (j == selectedIndex || currentToggles[j] == null) continue;
                    currentToggles[j].SetIsOnWithoutNotify(false);
                }
            });
        }
    }

    private Toggle[] GetOrderedToggles(Transform step)
    {
        Toggle[] toggles = step != null ? step.GetComponentsInChildren<Toggle>(true) : new Toggle[0];
        System.Array.Sort(toggles, (a, b) => string.Compare(a.name, b.name, System.StringComparison.Ordinal));
        return toggles;
    }

    private void EnsureToggleRaycastArea(Toggle toggle)
    {
        if (toggle == null) return;

        Graphic rootGraphic = toggle.GetComponent<Graphic>();
        if (rootGraphic == null)
        {
            Image image = toggle.gameObject.AddComponent<Image>();
            image.color = new Color(1f, 1f, 1f, 0f);
            rootGraphic = image;
        }

        rootGraphic.raycastTarget = true;
        toggle.targetGraphic = rootGraphic;

        Graphic[] graphics = toggle.GetComponentsInChildren<Graphic>(true);
        for (int i = 0; i < graphics.Length; i++)
        {
            if (graphics[i] == null) continue;
            graphics[i].raycastTarget = true;
        }

        RectTransform rect = toggle.GetComponent<RectTransform>();
        if (rect != null)
        {
            Vector2 size = rect.sizeDelta;
            if (Mathf.Abs(size.x) < 120f) size.x = 220f;
            if (Mathf.Abs(size.y) < 32f) size.y = 48f;
            rect.sizeDelta = size;
        }
    }

    private void HideDialogue()
    {
        if (_dialogueBubble != null) _dialogueBubble.gameObject.SetActive(false);
    }

    private void HideAllPanels()
    {
        HideDialogue();
        if (_gradeResult != null) _gradeResult.SetActive(false);
        if (_endPanel != null) _endPanel.SetActive(false);
    }

    private void ResetExamState(bool keepActive)
    {
        StopAllCoroutines();
        _examActive = keepActive;
        _currentStep = 0;
        _waitingForPoint2 = false;
        _waitingForShose = false;
        _waitingForWrapClicks = false;
        _splintBodyClicked = false;
        _placedPings.Clear();
        _wrappedPings.Clear();
        _clickedSplintPlanks.Clear();

        for (int i = 0; i < StepCount; i++)
        {
            _answered[i] = false;
            _correct[i] = false;
            _earned[i] = 0;
            _feedback[i] = "";
        }

        HideAllPanels();

        if (!keepActive)
        {
            HideSplintObjects();
            if (_manMuban != null) _manMuban.SetActive(false);
        }
    }

    private void ForceHideExamOnlyOutlines()
    {
        ShoseClickHandler shose = FindObjectOfType<ShoseClickHandler>(true);
        if (shose != null) shose.ForceHideOutline();

        ChanraoTuibuHandler chanraoTuibu = FindObjectOfType<ChanraoTuibuHandler>(true);
        if (chanraoTuibu != null) chanraoTuibu.ForceHideOutline();
    }

    private void MoveWomanToExamPoint()
    {
        GameObject woman = FindSceneObject("woman");
        GameObject pointArray = FindSceneObject("womanPointArray");
        Transform target = pointArray != null ? pointArray.transform.Find("point1") : null;
        if (woman == null || target == null) return;

        woman.transform.position = target.position;
        woman.transform.rotation = target.rotation;

        Animator anim = woman.GetComponent<Animator>();
        if (anim != null)
        {
            anim.SetBool("IsCheck", false);
            anim.SetBool("isCrouch", false);
        }
    }

    private bool IsExperimentPageVisible()
    {
        GameObject panel = FindSceneObject("ExperimentPanel");
        return panel == null || panel.activeInHierarchy;
    }

    private GameObject FindSceneObject(string objectName)
    {
        GameObject found = GameObject.Find(objectName);
        if (found != null) return found;

        Transform[] all = Resources.FindObjectsOfTypeAll<Transform>();
        for (int i = 0; i < all.Length; i++)
        {
            Transform t = all[i];
            if (t != null && t.gameObject.scene.IsValid() && t.name == objectName)
            {
                return t.gameObject;
            }
        }

        return null;
    }
}