namespace FixedAssetPrintAgent;

internal sealed class PrintAgentApplicationContext : ApplicationContext
{
  private readonly NotifyIcon _notifyIcon;
  private readonly PrintAgentRuntime _runtime;
  private readonly MainForm _mainForm;
  private bool _exitRequested;

  public PrintAgentApplicationContext()
  {
    var storageRoot = Path.Combine(
      Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
      "FixedAssetPrintAgent");

    _runtime = new PrintAgentRuntime(storageRoot, Application.ProductVersion, Application.ExecutablePath);
    _runtime.StateChanged += HandleStateChanged;

    _mainForm = new MainForm(_runtime);
    _mainForm.FormClosing += HandleMainFormClosing;

    _notifyIcon = new NotifyIcon
    {
      Icon = SystemIcons.Application,
      Visible = true,
      Text = "固定资产打印助手"
    };
    _notifyIcon.DoubleClick += (_, _) => ShowMainWindow();
    _notifyIcon.ContextMenuStrip = BuildContextMenu();

    _ = InitializeAsync();
  }

  private async Task InitializeAsync()
  {
    try
    {
      await _runtime.InitializeAsync();

      if (!_runtime.CurrentState.IsPaired)
      {
        ShowMainWindow();
      }
    }
    catch (Exception ex)
    {
      MessageBox.Show(
        $"打印助手初始化失败：{ex.Message}",
        "打印助手",
        MessageBoxButtons.OK,
        MessageBoxIcon.Warning);
      ShowMainWindow();
    }
  }

  private ContextMenuStrip BuildContextMenu()
  {
    var menu = new ContextMenuStrip();
    menu.Items.Add("打开打印助手", null, (_, _) => ShowMainWindow());
    menu.Items.Add("立即发送心跳", null, async (_, _) => await _runtime.HeartbeatNowAsync());
    menu.Items.Add("立即轮询任务", null, async (_, _) => await _runtime.ClaimNowAsync());
    menu.Items.Add(new ToolStripSeparator());
    menu.Items.Add("退出", null, (_, _) => ExitApplication());
    return menu;
  }

  private void HandleStateChanged(object? sender, PrintAgentRuntimeState state)
  {
    var summary = state.IsPaired
      ? string.IsNullOrWhiteSpace(state.Configuration.SelectedPrinterName)
        ? "待配置打印机"
        : "已配对"
      : "未配对";

    var text = $"固定资产打印助手 - {summary}";
    _notifyIcon.Text = text.Length > 63 ? text[..63] : text;
  }

  private void HandleMainFormClosing(object? sender, FormClosingEventArgs e)
  {
    if (_exitRequested)
    {
      return;
    }

    e.Cancel = true;
    _mainForm.Hide();
  }

  private void ShowMainWindow()
  {
    if (_mainForm.Visible)
    {
      _mainForm.WindowState = FormWindowState.Normal;
      _mainForm.Activate();
      return;
    }

    _mainForm.Show();
    _mainForm.WindowState = FormWindowState.Normal;
    _mainForm.BringToFront();
    _mainForm.Activate();
  }

  private void ExitApplication()
  {
    _exitRequested = true;
    _notifyIcon.Visible = false;
    _mainForm.Close();
    ExitThread();
  }

  protected override void ExitThreadCore()
  {
    _notifyIcon.Visible = false;
    _notifyIcon.Dispose();
    _runtime.Dispose();
    base.ExitThreadCore();
  }
}