using System;
using System.IO;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Media.Imaging;
using EveryPublish.Client.Pages;
using EveryPublish.Client.Services;
using H.NotifyIcon;

namespace EveryPublish.Client;

public sealed partial class MainWindow : Window
{
    private readonly string _dataDir = Path.Combine(
        Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
        "EveryPublish");
    private readonly CoreClient _core;
    private readonly Watchdog _watchdog;
    private readonly ClientContext _context;
    private TaskbarIcon? _tray;
    private bool _exiting;

    /// <summary>供设置页「退出客户端」调用</summary>
    public static Action? ExitAction;

    public MainWindow()
    {
        InitializeComponent();
        Directory.CreateDirectory(_dataDir);
        _core = new CoreClient(_dataDir);
        _watchdog = new Watchdog(_core, _dataDir, OnCoreFatal);
        _context = new ClientContext(_core, _dataDir, _watchdog);
        ExitAction = ExitApp;
        AppWindow.Closing += OnClosing;
        InitTray();
        NavView.SelectedItem = NavView.MenuItems[0];
        Navigate("status");
        _watchdog.Start();
    }

    private void OnCoreFatal()
    {
        DispatcherQueue.TryEnqueue(async () =>
        {
            var dialog = new ContentDialog
            {
                Title = "核心进程异常",
                Content = "agent-core 连续重启失败，请检查安装目录或重新安装。",
                CloseButtonText = "知道了",
                XamlRoot = Content.XamlRoot,
            };
            await dialog.ShowAsync();
        });
    }

    private void InitTray()
    {
        try
        {
            _tray = new TaskbarIcon { ToolTipText = "EveryPublish 客户端" };
            var iconPath = Path.Combine(AppContext.BaseDirectory, "Assets", "app.ico");
            if (File.Exists(iconPath))
            {
                _tray.IconSource = new BitmapImage(new Uri(iconPath));
            }
            // H.NotifyIcon 2.x：左/右键命令打开主窗口（退出入口在设置页）
            _tray.LeftClickCommand = new SimpleCommand(ShowWindow);
            _tray.RightClickCommand = new SimpleCommand(ShowWindow);
        }
        catch
        {
            // 托盘不可用不影响主功能
        }
    }

    private void ShowWindow()
    {
        AppWindow.Show();
        Activate();
    }

    private void OnClosing(AppWindow sender, AppWindowClosingEventArgs args)
    {
        if (!_exiting)
        {
            args.Cancel = true;
            AppWindow.Hide(); // 隐藏到托盘（WinUI 3 无 Window.Hide，用 AppWindow.Hide）
        }
    }

    private void ExitApp()
    {
        _exiting = true;
        _tray?.Dispose();
        _watchdog.Dispose();
        _core.Dispose();
        Close();
    }

    private void NavView_SelectionChanged(NavigationView sender, NavigationViewSelectionChangedEventArgs args)
    {
        if (args.SelectedItem is NavigationViewItem item && item.Tag is string tag)
        {
            Navigate(tag);
        }
    }

    private void Navigate(string tag)
    {
        Type page = tag switch
        {
            "pair" => typeof(PairPage),
            "challenges" => typeof(ChallengesPage),
            "settings" => typeof(SettingsPage),
            _ => typeof(StatusPage),
        };
        ContentFrame.Navigate(page, _context);
    }
}