using CursorLang.Models;

namespace CursorLang.Services;

/// <summary>
/// Ties layout tracking to showing the popup.
/// Lives for as long as the application runs, regardless of the open windows.
/// </summary>
public sealed class LayoutNotificationCoordinator : IDisposable
{
    private readonly IKeyboardLayoutService _layoutService;
    private readonly ILayoutPopupService _popupService;

    public LayoutNotificationCoordinator(IKeyboardLayoutService layoutService, ILayoutPopupService popupService)
    {
        _layoutService = layoutService;
        _popupService = popupService;
    }

    public void Start()
    {
        _layoutService.LayoutChanged += OnLayoutChanged;
        _layoutService.Start();
    }

    public void Dispose()
    {
        _layoutService.LayoutChanged -= OnLayoutChanged;
        _layoutService.Stop();
    }

    private void OnLayoutChanged(object? sender, LayoutChangedEventArgs e)
    {
        // When moving to another application the layout changes without the user
        // taking part, and a popup would be intrusive
        if (e.Reason == LayoutChangeReason.UserSwitched)
        {
            _popupService.Show(e.Layout);
        }
    }
}