using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Windows;
using System.Windows.Controls;
using WindowsGotify.Models;
using WindowsGotify.Services;
using WindowsGotify.Tray;

// 双开 WPF + WinForms 时,MessageBox 在两个命名空间都有,用别名强制走 WPF 的。
using MessageBox = System.Windows.MessageBox;

namespace WindowsGotify;

public partial class MainWindow : Window
{
    private const int MaxHistoryInUi = 200;

    private AppConfig? _config;
    private ConfigService? _configService;
    private Logger? _logger;
    private TrayIconService? _tray;
    private GotifyWebSocketService? _webSocket;
    private GotifyApiService? _apiService;

    private readonly ObservableCollection<GotifyMessage> _history = new();

    public MainWindow()
    {
        InitializeComponent();
        HistoryList.ItemsSource = _history;

        Closing += (_, e) =>
        {
            e.Cancel = true;
            Hide();
        };
    }

    public void Initialize(
        AppConfig config,
        ConfigService configService,
        Logger logger,
        TrayIconService tray,
        GotifyWebSocketService webSocket,
        GotifyApiService apiService)
    {
        _config = config;
        _configService = configService;
        _logger = logger;
        _tray = tray;
        _webSocket = webSocket;
        _apiService = apiService;

        UrlTextBox.Text = config.Gotify.Url;
        TokenBox.Password = config.Gotify.ClientToken;
        StatusText.Text = "状态:等待连接";
        UpdateHistoryCount();

        // 实时消息追加到历史
        _webSocket.MessageReceived += OnLiveMessage;
    }

    public void ShowFromTray()
    {
        Show();
        WindowState = WindowState.Normal;
        Activate();
        // 每次打开都拉一次最新历史,确保和远端同步
        _ = LoadHistoryAsync();
    }

    private void OnLiveMessage(GotifyMessage msg)
    {
        // WebSocket 回调可能在非 UI 线程,切回 UI 线程
        Dispatcher.Invoke(() =>
        {
            _history.Insert(0, msg);
            TrimHistory();
            UpdateHistoryCount();
        });
    }

    private void TrimHistory()
    {
        while (_history.Count > MaxHistoryInUi)
        {
            _history.RemoveAt(_history.Count - 1);
        }
    }

    private void UpdateHistoryCount()
    {
        HistoryCountText.Text = $"共 {_history.Count} 条(本地缓存上限 {MaxHistoryInUi})";
    }

    private async Task LoadHistoryAsync()
    {
        if (_apiService is null || _config is null) return;
        if (string.IsNullOrWhiteSpace(_config.Gotify.ClientToken))
        {
            StatusText.Text = "状态:未配置 Client Token,无法拉取历史";
            return;
        }

        try
        {
            StatusText.Text = "状态:正在拉取历史...";
            var limit = Math.Clamp(_config.History.ViewerLimit, 1, 100);
            var messages = await _apiService.GetRecentMessagesAsync(limit, CancellationToken.None);

            // 用清空 + 批量 Insert 让 UI 一次性刷新,避免多次 CollectionChanged
            _history.Clear();
            foreach (var m in messages)
            {
                _history.Add(m);
            }
            UpdateHistoryCount();
            StatusText.Text = $"状态:已加载 {messages.Count} 条历史消息";
            _logger?.Info($"History loaded. count={messages.Count}");
        }
        catch (Exception ex)
        {
            _logger?.Error("Load history failed.", ex);
            StatusText.Text = $"状态:拉取历史失败 - {ex.Message}";
        }
    }

    private async void RefreshButton_Click(object sender, RoutedEventArgs e)
    {
        await LoadHistoryAsync();
    }

    private void HistoryList_MouseDoubleClick(object sender, System.Windows.Input.MouseButtonEventArgs e)
    {
        if (HistoryList.SelectedItem is not GotifyMessage msg) return;
        var url = msg.ClickUrl;
        if (string.IsNullOrWhiteSpace(url)) return;

        try
        {
            Process.Start(new ProcessStartInfo
            {
                FileName = url,
                UseShellExecute = true
            });
            _logger?.Info($"Opened click url. id={msg.Id}, url={url}");
        }
        catch (Exception ex)
        {
            _logger?.Error("Failed to open click url.", ex);
            MessageBox.Show($"无法打开链接:{ex.Message}", "Windows Gotify",
                MessageBoxButton.OK, MessageBoxImage.Warning);
        }
    }

    private async void SaveButton_Click(object sender, RoutedEventArgs e)
    {
        if (_config is null || _configService is null) return;

        var url = UrlTextBox.Text.Trim();
        var token = TokenBox.Password.Trim();

        if (!Uri.TryCreate(url, UriKind.Absolute, out var uri) ||
            (uri.Scheme != Uri.UriSchemeHttp && uri.Scheme != Uri.UriSchemeHttps))
        {
            MessageBox.Show("Gotify URL 无效。", "Windows Gotify",
                MessageBoxButton.OK, MessageBoxImage.Warning);
            return;
        }

        if (string.IsNullOrWhiteSpace(token))
        {
            MessageBox.Show("Client Token 不能为空。", "Windows Gotify",
                MessageBoxButton.OK, MessageBoxImage.Warning);
            return;
        }

        _config.Gotify.Url = url.TrimEnd('/');
        _config.Gotify.ClientToken = token;

        await _configService.SaveAsync(_config);
        _webSocket?.RequestReconnect();

        MessageBox.Show("配置已保存,正在重新连接。", "Windows Gotify",
            MessageBoxButton.OK, MessageBoxImage.Information);
    }

    private async void TestButton_Click(object sender, RoutedEventArgs e)
    {
        try
        {
            var notification = new NotificationService(_config!, _logger!);
            await notification.ShowAsync(new GotifyMessage
            {
                Id = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds(),
                Message = "Windows Gotify Agent 测试成功。",
                Title = "Gotify 测试",
                Priority = 5,
                Date = DateTimeOffset.UtcNow
            });
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message, "测试通知失败",
                MessageBoxButton.OK, MessageBoxImage.Error);
        }
    }
}