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

public class ExamFlowManager : MonoBehaviour
{
    private const int StepCount = 7;

    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 Transform _dialogueBubble;
    private GameObject _gradeResult;
    private GameObject _endPanel;
    private Button _dialogueYesButton;
    private Button _dialogueBackButton;
    private Text _gradeContent;
    private Text _gradeScoreText;
    private int _currentStep;
    private bool _examActive;
    private bool _waitingForPoint2;
    private bool _waitingForShose;
    private bool _waitingForWrapClicks;

    private void Awake()
    {
        AutoBind();
    }

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

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

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

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

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

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

        ForceHideExamOnlyOutlines();
        MoveWomanToExamPoint();
        ShowStep(1);
        Debug.Log("[ExamFlow] 考核模式流程启动");
    }

    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);
        }

        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。");
                StartCoroutine(ShowStepDelayed(2, 1f));
            }
            return;
        }

        if (clicked is ShoseClickHandler)
        {
            if (_waitingForShose || _currentStep <= 2)
            {
                _waitingForShose = false;
                RecordStep(2, true, "已完成下肢固定前置处理。");
                StartCoroutine(ShowStepDelayed(3, 1f));
            }
            return;
        }

        var ping = clicked as PingClickHandler;
        if (ping != null)
        {
            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。");
                    ShowStep(6);
                }
            }
            else
            {
                _placedPings.Add(ping.name);
                Debug.Log("[ExamFlow] 放带点击 " + _placedPings.Count + "/4: " + ping.name);
            }
            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;
            ShowStep(5);
        }
    }

    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;
                break;
            case 2:
                HideDialogue();
                _waitingForShose = true;
                break;
            case 3:
                RecordStep(3, GetSelectedToggleIndex(3) == 1, "正确答案：10cm。");
                ShowStep(4);
                ActivateFirstPing();
                break;
            case 4:
                HideDialogue();
                break;
            case 5:
                HideDialogue();
                _waitingForWrapClicks = true;
                break;
            case 6:
                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。");
                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) _gradeContent.text = gradeContent;
        if (_gradeScoreText != null) _gradeScoreText.text = totalScore.ToString();
    }

    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()
    {
        GameObject firstPing = FindSceneObject("ping.004");
        if (firstPing == null)
        {
            foreach (var ping in Resources.FindObjectsOfTypeAll<PingClickHandler>())
            {
                if (ping != null && ping.gameObject.scene.IsValid() && ping.pingIndex == 0)
                {
                    firstPing = ping.gameObject;
                    break;
                }
            }
        }

        if (firstPing != null)
        {
            firstPing.SetActive(true);
            var handler = firstPing.GetComponent<PingClickHandler>();
            if (handler != null) handler.ResetState(true);
        }
    }

    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;

        Text text = content.GetComponent<Text>();
        if (text == null)
        {
            text = content.GetComponentInChildren<Text>(true);
        }

        if (text == null)
        {
            text = content.gameObject.AddComponent<Text>();
            text.font = Resources.GetBuiltinResource<Font>("LegacyRuntime.ttf");
            text.fontSize = 24;
            text.color = Color.black;
            text.alignment = TextAnchor.UpperLeft;
            text.horizontalOverflow = HorizontalWrapMode.Wrap;
            text.verticalOverflow = VerticalWrapMode.Overflow;
        }

        return text;
    }

    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.onClick.AddListener(() =>
            {
                _gradeResult.SetActive(false);
                if (_endPanel != null) _endPanel.SetActive(true);
            });
        }

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

    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 = step.Find("Title")?.GetComponent<Text>();
        Text content = step.Find("content")?.GetComponent<Text>();

        if (title != null) title.text = "考核点" + ToChineseNumber(stepNumber);
        if (content != null) content.text = GetQuestionText(stepNumber);

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

    private string GetQuestionText(int stepNumber)
    {
        switch (stepNumber)
        {
            case 1: return "点击确认后，请按正确顺序进行操作。";
            case 2: return "点击确认后，请按正确顺序操作下肢固定前置处理。";
            case 3: return "请选择合适的带子宽度。";
            case 4: return "请选择正确的放带子顺序。";
            case 5: return "请选择正确的系带子顺序。";
            case 6: return "请选择带子打结位置。";
            case 7: return "请选择踝关节打结位置。";
            default: return "";
        }
    }

    private string GetAnswerText(int stepNumber)
    {
        switch (stepNumber)
        {
            case 1: return "先评估伤员、取出急救用品、脱除伤侧鞋子。";
            case 2: return "摆放夹板衬垫、摆正伤肢、保护踝关节。";
            case 3: return "10cm。";
            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，再依次向大腿近端收紧捆绑。";
            case 6: return "应在未受伤腿的位置打结，不压迫伤肢，方便后续拆除。";
            case 7: return "足背。";
            default: return "";
        }
    }

    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 = root.Find(toggleName);
        Text text = toggle?.Find("Label")?.GetComponent<Text>();
        if (text != null) text.text = label;
    }

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

        Toggle[] toggles = step.GetComponentsInChildren<Toggle>(true);
        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 = step.GetComponentsInChildren<Toggle>(true);
        for (int i = 0; i < toggles.Length; i++)
        {
            toggles[i].isOn = 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;

            Image image = child.GetComponent<Image>();
            if (image != null) image.raycastTarget = false;
        }
    }

    private void EnsureToggleGroup(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 = step.GetComponentsInChildren<Toggle>(true);
        for (int i = 0; i < toggles.Length; i++)
        {
            toggles[i].group = group;
        }
    }

    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;
        _placedPings.Clear();
        _wrappedPings.Clear();

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

        HideAllPanels();
    }

    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;
    }
}