using UnityEngine;
using UnityEngine.UI;
using System;

/// <summary>
/// 考核弹窗：选择题 + 操作确认。
/// 回调返回 proportion (0~1 得分比例) 和 feedback。
/// </summary>
public class ExamPopup : MonoBehaviour
{
    [Header("UI 组件")]
    [SerializeField] private GameObject _popupRoot;
    [SerializeField] private Text _questionText;
    [SerializeField] private Toggle[] _optionToggles;
    [SerializeField] private Text[] _optionLabels;
    [SerializeField] private Button _confirmButton;
    [SerializeField] private Text _feedbackText;

    [Header("操作题 UI")]
    [SerializeField] private GameObject _operationPanel;
    [SerializeField] private Text _operationHint;

    private StepData _currentStep;
    private Action<float, string> _onAnswerCallback;
    private int _selectedIndex = -1;

    private void Awake()
    {
        if (_confirmButton) _confirmButton.onClick.AddListener(OnConfirm);
        if (_popupRoot != null) _popupRoot.SetActive(false);
    }

    public void Show(StepData step, Action<float, string> onAnswer)
    {
        _currentStep = step;
        _onAnswerCallback = onAnswer;
        _selectedIndex = -1;
        if (_feedbackText != null) _feedbackText.text = "";
        if (_popupRoot != null) _popupRoot.SetActive(true);

        if (_questionText != null) _questionText.text = step.ExamQuestionText;

        switch (step.CompleteType)
        {
            case StepCompleteType.MultipleChoice:
                SetupMultipleChoice(step);
                break;
            case StepCompleteType.ClickObject:
                SetupClickObject(step);
                break;
            case StepCompleteType.SequenceClick:
                SetupSequenceClick(step);
                break;
            default:
                SetupDefault(step);
                break;
        }
    }

    private void SetupMultipleChoice(StepData step)
    {
        if (_operationPanel != null) _operationPanel.SetActive(false);

        int optionCount = step.ExamOptions != null ? step.ExamOptions.Length : 0;
        for (int i = 0; i < (_optionToggles != null ? _optionToggles.Length : 0); i++)
        {
            bool active = i < optionCount;
            _optionToggles[i].gameObject.SetActive(active);
            _optionToggles[i].isOn = false;
            _optionToggles[i].onValueChanged.RemoveAllListeners();
            int idx = i;
            _optionToggles[i].onValueChanged.AddListener((val) => { if (val) _selectedIndex = idx; });
            if (active && _optionLabels != null && i < _optionLabels.Length)
                _optionLabels[i].text = step.ExamOptions[i];
        }

        if (_confirmButton != null) _confirmButton.gameObject.SetActive(true);
    }

    private void SetupClickObject(StepData step)
    {
        if (_operationPanel != null) _operationPanel.SetActive(true);
        if (_optionToggles != null)
            foreach (var t in _optionToggles) t.gameObject.SetActive(false);
        if (_confirmButton != null) _confirmButton.gameObject.SetActive(true);
        if (_operationHint != null) _operationHint.text = "请点击场景中的 " + step.TargetTag + " 物体";
    }

    private void SetupSequenceClick(StepData step)
    {
        if (_operationPanel != null) _operationPanel.SetActive(true);
        if (_optionToggles != null)
            foreach (var t in _optionToggles) t.gameObject.SetActive(false);
        if (_confirmButton != null) _confirmButton.gameObject.SetActive(true);
        if (_operationHint != null) _operationHint.text = "请按正确顺序点击物体，完成后按确定";
    }

    private void SetupDefault(StepData step)
    {
        if (_operationPanel != null) _operationPanel.SetActive(false);
        if (_optionToggles != null)
            foreach (var t in _optionToggles) t.gameObject.SetActive(false);
        if (_confirmButton != null) _confirmButton.gameObject.SetActive(true);
    }

    private void OnConfirm()
    {
        if (_currentStep == null) return;

        float proportion = 1f;
        string feedback = "";

        if (_currentStep.CompleteType == StepCompleteType.MultipleChoice)
        {
            bool correct = _selectedIndex == _currentStep.CorrectOptionIndex;
            proportion = correct ? 1f : 0f;
            feedback = correct ? "" : _currentStep.ErrorFeedback;
            if (!correct && _feedbackText != null)
                _feedbackText.text = feedback;
        }

        _onAnswerCallback?.Invoke(proportion, feedback);
        Hide();
    }

    public void Hide()
    {
        if (_popupRoot != null) _popupRoot.SetActive(false);
        _currentStep = null;
        _onAnswerCallback = null;
    }
}