VFSUnity/Assets/Scripts/UI/PageController.cs

using UnityEngine;
using UnityEngine.UI;

public class PageController : MonoBehaviour
{
    [Header("=== 三个主页面 ===")]
    [SerializeField] private GameObject _homePagePanel;
    [SerializeField] private GameObject _modeSelectPanel;
    [SerializeField] private GameObject _fixationPanel;

    [Header("=== 实验页面 ===")]
    [SerializeField] private GameObject _experimentPanel;
    [SerializeField] private Button _btnExperimentBack;

    [Header("=== 实验内 UI（由 UIManager 管理）===")]
    [SerializeField] private UIManager _uiManager;

    [Header("=== 首页控件 ===")]
    [SerializeField] private Button _btnStart;
    [SerializeField] private Button _btnExit;

    [Header("=== 模式选择页控件 ===")]
    [SerializeField] private Button _btnBack;
    [SerializeField] private Button _btnPracticeMode;
    [SerializeField] private Button _btnExamMode;
    [SerializeField] private Text _modeDescText;

    [Header("=== 固定方式选择页控件 ===")]
    [SerializeField] private Button _btnFixationBack;
    [SerializeField] private Button _btnLimbFixation;
    [SerializeField] private Button _btnSplintFixation;

    [Header("=== 模式说明文案 ===")]
    [SerializeField] [TextArea(2, 4)] private string _practiceModeDesc =
        "模拟练习模式：不限时长，可反复练习。系统不评分，帮助您熟悉实验流程和操作步骤。";
    [SerializeField] [TextArea(2, 4)] private string _examModeDesc =
        "考核评估模式：限定时间，完成后系统自动评分，并提供详细反馈报告。";

    [Header("=== 编辑器预览（仅 Editor 模式有效）===")]
    [SerializeField] private EditorPreviewPage _editorPreview = EditorPreviewPage.None;

    public enum Page { Home, ModeSelect, Fixation, Experiment }
    public enum EditorPreviewPage { None, Home, ModeSelect, Fixation, Experiment }

    private Page _currentPage = Page.Home;
    private ExperimentMode _selectedMode = ExperimentMode.Learn;

    private void Start()
    {
        Debug.Log("=== PageController 初始化开始 ===");

        // 绑定首页按钮
        if (_btnStart != null)
        {
            _btnStart.onClick.AddListener(OnStartClicked);
            Debug.Log("PageController: _btnStart 绑定成功");
        }
        else
            Debug.LogError("PageController: _btnStart 未赋值！");

        if (_btnExit != null)
        {
            _btnExit.onClick.AddListener(OnExitClicked);
            Debug.Log("PageController: _btnExit 绑定成功");
        }
        else
            Debug.LogError("PageController: _btnExit 未赋值！");

        // 绑定模式选择页按钮
        if (_btnBack != null)
        {
            _btnBack.onClick.AddListener(OnModeBackClicked);
            Debug.Log("PageController: _btnBack 绑定成功");
        }
        else
            Debug.LogError("PageController: _btnBack 未赋值！");

        if (_btnPracticeMode != null)
        {
            _btnPracticeMode.onClick.AddListener(() => OnModeSelected(ExperimentMode.Learn));
            Debug.Log("PageController: _btnPracticeMode 绑定成功");
        }
        else
            Debug.LogError("PageController: _btnPracticeMode 未赋值！");

        if (_btnExamMode != null)
        {
            _btnExamMode.onClick.AddListener(() => OnModeSelected(ExperimentMode.Exam));
            Debug.Log("PageController: _btnExamMode 绑定成功");
        }
        else
            Debug.LogError("PageController: _btnExamMode 未赋值！");

        // 绑定固定方式选择页按钮 —— 自动修复
        if (_btnFixationBack == null && _fixationPanel != null)
        {
            var btnBack = _fixationPanel.transform.Find("BtnBack");
            if (btnBack != null)
            {
                _btnFixationBack = btnBack.GetComponent<Button>();
                Debug.Log("PageController: 自动绑定 FixationPanel/BtnBack（_btnFixationBack 原为空）");
            }
        }
        if (_btnFixationBack != null)
        {
            _btnFixationBack.onClick.AddListener(OnFixationBackClicked);
            Debug.Log("PageController: _btnFixationBack 绑定成功");
        }
        else
            Debug.LogError("PageController: _btnFixationBack 未找到！请在 Inspector 赋值或确保 FixationPanel 下有名为 BtnBack 的子物体。");

        if (_btnLimbFixation != null)
        {
            _btnLimbFixation.onClick.AddListener(() => OnFixationSelected(FixationMethod.LimbFixation));
            Debug.Log("PageController: _btnLimbFixation 绑定成功");
        }
        else
            Debug.LogError("PageController: _btnLimbFixation 未赋值！");

        if (_btnSplintFixation != null)
        {
            _btnSplintFixation.onClick.AddListener(() => OnFixationSelected(FixationMethod.SplintFixation));
            Debug.Log("PageController: _btnSplintFixation 绑定成功");
        }
        else
            Debug.LogError("PageController: _btnSplintFixation 未赋值！");

        // 绑定实验页面按钮 —— 自动修复
        if (_btnExperimentBack == null && _experimentPanel != null)
        {
            var btnBack = _experimentPanel.transform.Find("Navbar/BtnBack");
            if (btnBack != null)
            {
                _btnExperimentBack = btnBack.GetComponent<Button>();
                Debug.Log("PageController: 自动绑定 ExperimentPanel/Navbar/BtnBack（_btnExperimentBack 原为空）");
            }
        }
        if (_btnExperimentBack != null)
        {
            _btnExperimentBack.onClick.AddListener(OnExperimentBackClicked);
            Debug.Log("PageController: _btnExperimentBack 绑定成功");
        }
        else
            Debug.LogError("PageController: _btnExperimentBack 未找到！请在 Inspector 赋值或确保 ExperimentPanel/Navbar 下有名为 BtnBack 的子物体。");

        // 初始化模式说明文字
        if (_modeDescText != null)
        {
            _modeDescText.text = _practiceModeDesc + "\n\n" + _examModeDesc;
            Debug.Log("PageController: _modeDescText 初始化完成");
        }

        // 初始显示首页
        ShowPage(Page.Home);
        Debug.Log("=== PageController 初始化完成 ===");
    }

#if UNITY_EDITOR
    private void OnValidate()
    {
        if (Application.isPlaying) return;

        UnityEditor.EditorApplication.delayCall += () =>
        {
            if (this == null) return;
            if (Application.isPlaying) return;

            switch (_editorPreview)
            {
                case EditorPreviewPage.None: break;
                case EditorPreviewPage.Home: ShowPageEditMode(Page.Home); break;
                case EditorPreviewPage.ModeSelect: ShowPageEditMode(Page.ModeSelect); break;
                case EditorPreviewPage.Fixation: ShowPageEditMode(Page.Fixation); break;
                case EditorPreviewPage.Experiment: ShowPageEditMode(Page.Experiment); break;
            }

            _editorPreview = EditorPreviewPage.None;
        };
    }

    private void ShowPageEditMode(Page page)
    {
        if (_homePagePanel != null) _homePagePanel.SetActive(page == Page.Home);
        if (_modeSelectPanel != null) _modeSelectPanel.SetActive(page == Page.ModeSelect);
        if (_fixationPanel != null) _fixationPanel.SetActive(page == Page.Fixation);
        if (_experimentPanel != null) _experimentPanel.SetActive(page == Page.Experiment);

        if (_uiManager != null)
            _uiManager.enabled = (page == Page.Experiment);

        Debug.Log($"PageController（编辑器预览）: 切换到 [{page}]");
    }
#endif

    #region 页面切换

    private void ShowPage(Page page)
    {
        Debug.Log($"PageController: 页面切换 [{_currentPage}] → [{page}]");
        _currentPage = page;

        if (_homePagePanel != null) _homePagePanel.SetActive(page == Page.Home);
        if (_modeSelectPanel != null) _modeSelectPanel.SetActive(page == Page.ModeSelect);
        if (_fixationPanel != null) _fixationPanel.SetActive(page == Page.Fixation);
        if (_experimentPanel != null) _experimentPanel.SetActive(page == Page.Experiment);

        if (_uiManager != null)
            _uiManager.enabled = (page == Page.Experiment);
    }

    #endregion

    #region 按钮回调

    private void OnStartClicked()
    {
        Debug.Log("PageController: [BtnStart] 点击 -> 切换到 ModeSelect");
        ShowPage(Page.ModeSelect);
    }

    private void OnExitClicked()
    {
        Debug.Log("PageController: [BtnExit] 点击 -> 退出应用");
#if UNITY_EDITOR
        UnityEditor.EditorApplication.isPlaying = false;
#else
        Application.Quit();
#endif
    }

    private void OnModeBackClicked()
    {
        Debug.Log("PageController: [BtnBack(Mode)] 点击 -> 返回 Home");
        ShowPage(Page.Home);
    }

    private void OnModeSelected(ExperimentMode mode)
    {
        Debug.Log($"PageController: [ModeSelected] 点击 -> 模式 [{mode}] -> 切换到 Fixation");
        _selectedMode = mode;

        ShowPage(Page.Fixation);
    }

    private void OnFixationBackClicked()
    {
        Debug.Log("PageController: [BtnFixationBack] 点击 -> 返回 ModeSelect");
        if (_modeDescText != null)
        {
            _modeDescText.text = _practiceModeDesc + "\n\n" + _examModeDesc;
        }

        ShowPage(Page.ModeSelect);
    }

    private void OnExperimentBackClicked()
    {
        Debug.Log("PageController: [BtnExperimentBack] 点击 -> 返回 Fixation");
        ShowPage(Page.Fixation);
    }

    private void OnFixationSelected(FixationMethod method)
    {
        Debug.Log($"PageController: [FixationSelected] 点击 -> 固定方式 [{method}] -> 切换到 Experiment");
        var gm = GameManager.Instance;
        if (gm == null)
        {
            Debug.LogError("PageController: GameManager.Instance 为空！");
            return;
        }

        gm.CurrentMode = _selectedMode;
        gm.CurrentFixationMethod = method;
        Debug.Log($"PageController: GameManager 已设置 Mode=[{gm.CurrentMode}] Fixation=[{gm.CurrentFixationMethod}]");

        ShowPage(Page.Experiment);

        var stepManager = FindObjectOfType<StepManager>();
        if (stepManager != null)
        {
            stepManager.InitializeFromGameManager();
            Debug.Log("PageController: StepManager.InitializeFromGameManager() 已调用");
        }
        else
        {
            Debug.LogWarning("PageController: 未找到 StepManager，实验步骤不会自动初始化");
        }
    }

    public void ReturnToHome()
    {
        Debug.Log("PageController: [ReturnToHome] 返回首页");
        ShowPage(Page.Home);
    }

    #endregion
}