using Xunit;

namespace ytLive.Tests;

/// <summary>The creator (2026-10-30): in App Settings the brand-logo field is only a file NAME,
/// which says nothing about the picture, so "myopic users like myself" cannot confirm what is
/// set. The field now carries a thumbnail — hover enlarges it, a click collapses it.
///
/// <para>The ONE test covers both halves: the XAML wiring that routes hover/leave/click, and the
/// control's own open/close behaviour (a Popup is a separate window, so only this seam can
/// observe it). Runs inside the real App because the control resolves theme resources at load.</para></summary>
[Collection("RealApp")]
public class BrandLogoPreviewTests
{
    private readonly RealAppHost _app;

    public BrandLogoPreviewTests(RealAppHost app) => _app = app;

    [Fact]
    public void Hovering_the_thumbnail_opens_the_enlarged_preview_and_a_click_collapses_it()
    {
        // 1. Wiring: the thumbnail is image-bound and hidden when no image is set, the enlarged
        //    popup shows the same source at a readable size, and every gesture reaches a handler.
        var xaml = SourceAssert.Text("Controls", "OverlayHost.xaml");
        Assert.Contains("x:Name=\"BrandLogoThumbImage\"", xaml);
        Assert.Contains("{Binding BrandLogoPreviewImage}", xaml);
        Assert.Contains("NotNullToVis", xaml);
        Assert.Contains("x:Name=\"BrandLogoPreviewPopup\"", xaml);
        Assert.Contains("MaxWidth=\"420\"", xaml);
        foreach (var handler in new[]
                 {
                     "MouseEnter=\"BrandLogoThumb_MouseEnter\"",
                     "MouseLeave=\"BrandLogoThumb_MouseLeave\"",
                     "MouseLeftButtonUp=\"BrandLogoThumb_Click\"",
                     "MouseLeave=\"BrandLogoPreviewPopup_MouseLeave\"",
                 })
            Assert.Contains(handler, xaml);

        // 2. Behaviour on the real control.
        _app.Run(() =>
        {
            // A Popup refuses to open until its placement target is in a live visual tree, so the
            // control is hosted in a real window — the same condition the app provides.
            var host = new ytLive.Controls.OverlayHost();
            var window = new System.Windows.Window { Content = host, Width = 420, Height = 420 };
            window.Show();
            try
            {
                Assert.False(host.IsBrandLogoPreviewOpen);

                host.OpenBrandLogoPreview();
                Assert.True(host.IsBrandLogoPreviewOpen, "hovering the thumbnail must open the enlargement");

                host.CloseBrandLogoPreview();
                Assert.False(host.IsBrandLogoPreviewOpen, "a click must collapse it again");
            }
            finally { window.Close(); }
        });
    }
}