using ytLive.Services;

namespace ytLive.ViewModels;

public partial class MainViewModel
{
    /// <summary>Test seam (mirrors CameraEnumeratorOverride): tests inject a fake
    /// stats service before constructing the VM so refresh never hits the network.</summary>
    internal static Func<ChannelStatsService>? ChannelStatsFactoryOverride { get; set; }

    /// <summary>The YPP pull-out backing VM — the drawer below Stream Settings
    /// on the Live screen's right edge (TASK 39).</summary>
    public Services.YppTrackerViewModel Ypp { get; private set; } = null!;

    /// <summary>The Test Stream pull-out backing VM — the TEST drawer at the
    /// bottom of the right rail (TASK 41): mock chat input (real insert →
    /// poll round-trip) + locally-simulated member / SuperChat / subscriber rows.</summary>
    public Services.TestSessionViewModel TestSession { get; private set; } = null!;

    private void InitYpp()
    {
        Ypp = new YppTrackerViewModel(
            () => _layoutStore,
            () => ChannelStatsFactoryOverride?.Invoke() ?? new ChannelStatsService(_youtubeAuth),
            () => IsConnected,
            () => _youtubeAuth.CurrentChannel?.DisplayName);

        TestSession = new TestSessionViewModel(
            _youtubeStream,
            _youtubeChat,
            onEndStream: StopStream);

        // One drawer at a time: the three pull-outs share the preview's right edge,
        // so opening one collapses the other two (all directions).
        BroadcastForm.PropertyChanged += (_, e) =>
        {
            if (e.PropertyName == nameof(LiveBroadcastFormViewModel.IsDrawerOpen) && BroadcastForm.IsDrawerOpen)
            {
                Ypp.IsDrawerOpen = false;
                TestSession.IsDrawerOpen = false;
            }
        };
        Ypp.PropertyChanged += (_, e) =>
        {
            if (e.PropertyName == nameof(YppTrackerViewModel.IsDrawerOpen) && Ypp.IsDrawerOpen)
            {
                BroadcastForm.IsDrawerOpen = false;
                TestSession.IsDrawerOpen = false;
            }
        };
        TestSession.PropertyChanged += (_, e) =>
        {
            if (e.PropertyName == nameof(TestSessionViewModel.IsDrawerOpen) && TestSession.IsDrawerOpen)
            {
                BroadcastForm.IsDrawerOpen = false;
                Ypp.IsDrawerOpen = false;
            }
        };
    }
}