luban_ui_internal/src/LubanHub.App/MainWindow.axaml.cs

using Avalonia.Controls;
using Avalonia.Interactivity;
using Avalonia.Controls.Selection;
using LubanHub.App.Services;
using LubanHub.App.ViewModels;
using Microsoft.Extensions.DependencyInjection;
using LubanHub.Core.Interfaces;
using System;

namespace LubanHub.App;

public partial class MainWindow : Window
{
    private Panel? _contentPanel;
    private StackPanel? _welcomePanel;
    private Grid? _knowledgePanel;
    private Grid? _knowledgeManagePanel;
    private Grid? _projectPanel;
    private Grid? _installPanel;
    private Grid? _settingsPanel;

    private Button? _knowledgeButton;
    private Button? _knowledgeManageButton;
    private Button? _projectButton;
    private Button? _installButton;
    private Button? _settingsButton;
    private ComboBox? _themeComboBox;
    private TextBox? _downloadDirectoryTextBox;

    private MainWindowViewModel? _viewModel;

    public MainWindow()
    {
        InitializeComponent();
        InitializeComponents();
        InitializeViewModel();
        
        // 订阅主题变化事件
        ThemeManager.ThemeChanged += OnThemeChanged;
        
        // 初始化主题
        ThemeManager.Initialize();
        UpdateThemeComboBox();
    }

    private void InitializeViewModel()
    {
        try
        {
            _viewModel = new MainWindowViewModel();
            DataContext = _viewModel;
            
            // 更新下载目录文本框
            UpdateDownloadDirectoryTextBox();
        }
        catch (Exception ex)
        {
            // 如果ViewModel初始化失败，记录错误但不中断应用启动
            Console.WriteLine($"初始化ViewModel时出错: {ex.Message}");
        }
    }

    private void UpdateDownloadDirectoryTextBox()
    {
        if (_downloadDirectoryTextBox != null && _viewModel != null)
        {
            _downloadDirectoryTextBox.Text = _viewModel.DownloadDirectory;
        }
    }

    private void InitializeComponents()
    {
        // 获取面板引用
        _contentPanel = this.FindControl<Panel>("ContentPanel");
        _welcomePanel = this.FindControl<StackPanel>("WelcomePanel");
        _knowledgePanel = this.FindControl<Grid>("KnowledgePanel");
        _knowledgeManagePanel = this.FindControl<Grid>("KnowledgeManagePanel");
        _projectPanel = this.FindControl<Grid>("ProjectPanel");
        _installPanel = this.FindControl<Grid>("InstallPanel");
        _settingsPanel = this.FindControl<Grid>("SettingsPanel");

        // 获取按钮引用
        _knowledgeButton = this.FindControl<Button>("KnowledgeButton");
        _knowledgeManageButton = this.FindControl<Button>("KnowledgeManageButton");
        _projectButton = this.FindControl<Button>("ProjectButton");
        _installButton = this.FindControl<Button>("InstallButton");
        _settingsButton = this.FindControl<Button>("SettingsButton");
        
        // 获取其他控件引用
        _themeComboBox = this.FindControl<ComboBox>("ThemeComboBox");
        _downloadDirectoryTextBox = this.FindControl<TextBox>("DownloadDirectoryTextBox");
    }

    private void ShowPanel(Grid? targetPanel)
    {
        // 隐藏所有面板
        if (_welcomePanel != null) _welcomePanel.IsVisible = false;
        if (_knowledgePanel != null) _knowledgePanel.IsVisible = false;
        if (_knowledgeManagePanel != null) _knowledgeManagePanel.IsVisible = false;
        if (_projectPanel != null) _projectPanel.IsVisible = false;
        if (_installPanel != null) _installPanel.IsVisible = false;
        if (_settingsPanel != null) _settingsPanel.IsVisible = false;

        // 显示目标面板
        if (targetPanel != null)
        {
            targetPanel.IsVisible = true;
        }

        // 更新按钮样式
        UpdateButtonStyles();
    }

    private void UpdateButtonStyles()
    {
        // 移除所有按钮的选中样式
        _knowledgeButton?.Classes.Remove("selected");
        _knowledgeManageButton?.Classes.Remove("selected");
        _projectButton?.Classes.Remove("selected");
        _installButton?.Classes.Remove("selected");
        _settingsButton?.Classes.Remove("selected");

        // 根据当前显示的面板添加选中样式
        if (_knowledgePanel?.IsVisible == true)
            _knowledgeButton?.Classes.Add("selected");
        else if (_knowledgeManagePanel?.IsVisible == true)
            _knowledgeManageButton?.Classes.Add("selected");
        else if (_projectPanel?.IsVisible == true)
            _projectButton?.Classes.Add("selected");
        else if (_installPanel?.IsVisible == true)
            _installButton?.Classes.Add("selected");
        else if (_settingsPanel?.IsVisible == true)
            _settingsButton?.Classes.Add("selected");
    }

    private void OnKnowledgeButtonClick(object? sender, RoutedEventArgs e)
    {
        ShowPanel(_knowledgePanel);
    }

    private void OnKnowledgeManageButtonClick(object? sender, RoutedEventArgs e)
    {
        ShowPanel(_knowledgeManagePanel);
    }

    private void OnProjectButtonClick(object? sender, RoutedEventArgs e)
    {
        ShowPanel(_projectPanel);
    }

    private void OnInstallButtonClick(object? sender, RoutedEventArgs e)
    {
        ShowPanel(_installPanel);
    }

    private void OnSettingsButtonClick(object? sender, RoutedEventArgs e)
    {
        ShowPanel(_settingsPanel);
    }

    private void OnThemeComboBoxSelectionChanged(object? sender, SelectionChangedEventArgs e)
    {
        if (_themeComboBox?.SelectedIndex != null)
        {
            var newTheme = _themeComboBox.SelectedIndex == 0 ? ThemeVariant.Dark : ThemeVariant.Light;
            ThemeManager.SetTheme(newTheme);
        }
    }

    private void OnThemeChanged(ThemeVariant theme)
    {
        UpdateThemeComboBox();
    }

    private void UpdateThemeComboBox()
    {
        if (_themeComboBox != null)
        {
            _themeComboBox.SelectedIndex = ThemeManager.CurrentTheme == ThemeVariant.Dark ? 0 : 1;
        }
    }

    private void OnBrowseDownloadDirectoryClick(object? sender, RoutedEventArgs e)
    {
        try
        {
            // 简单的目录选择实现，实际项目中应该使用文件对话框
            if (_viewModel != null)
            {
                _viewModel.ChangeDownloadDirectoryCommand.Execute(null);
                UpdateDownloadDirectoryTextBox();
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine($"浏览下载目录时出错: {ex.Message}");
        }
    }

    private void OnTestModuleDownloadClick(object? sender, RoutedEventArgs e)
    {
        try
        {
            if (_viewModel != null)
            {
                _viewModel.TestModuleDownloadCommand.Execute(null);
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine($"测试模块下载时出错: {ex.Message}");
        }
    }
}