using System.Linq;
using Xunit;

namespace ytLive.Tests;

/// <summary>The creator's six corrections (2026-10-30) are visual rulings, so the only honest guard
/// is one that pins the ruling to the markup: if a later edit quietly reverts one of them, this
/// fails and names it.
///
/// <para>1. Stream Info + YPP rails are YouTube surfaces (YouTube red). 2. EDIT shows a real
/// off/on difference. 3. The active scene outline is orange again. 4. Scene labels wear the same
/// pill as the hotkey chips. 5. REC / ON-AIR and the running stop button read red. 6. The
/// properties list no longer caps its height, so no scrollbar appears while space remains.</para></summary>
public class UiShellTests
{
    [Fact]
    public void The_creators_six_ui_corrections_are_in_the_markup()
    {
        var preview = SourceAssert.Text("Controls", "PreviewPane.xaml");
        var topBar = SourceAssert.Text("Controls", "TopBar.xaml");
        var strip = SourceAssert.Text("Controls", "SceneThumbnailStrip.xaml");
        var leftPanel = SourceAssert.Text("Controls", "LeftPanel.xaml");
        var theme = SourceAssert.Text("Themes", "Controls.xaml");
        var tokens = SourceAssert.Text("Themes", "Tokens.xaml");

        // 1. YouTube-branded rails.
        Assert.Contains("Brush.Youtube", tokens);
        Assert.Equal(2, Count(preview, "Background=\"{StaticResource Brush.Youtube}\""));

        // 2. EDIT: resting face differs from the armed face, and the label follows it.
        Assert.Contains("x:Name=\"EditBody\" Background=\"{StaticResource Brush.SurfaceContainerHigh}\"", topBar);
        Assert.Contains("<Setter TargetName=\"EditBody\" Property=\"Background\" Value=\"{StaticResource Brush.Tertiary}\"/>", topBar);
        // The label is white in BOTH states — only the fill changes. A muted resting colour is
        // what made it illegible on the dark bar (creator, 2026-10-30).
        Assert.Contains("FontSize=\"12\" Foreground=\"{StaticResource Brush.OnAccent}\"", topBar);

        // 3. Active scene = orange; live stays red.
        Assert.Contains("IsStaged}\" Value=\"True\">\n                                        <Setter Property=\"BorderBrush\" Value=\"{StaticResource Brush.Attention}\"/>", strip);

        // 4. Scene name pill, same shape as the hotkey chip.
        Assert.Contains("Padding=\"8,2\" CornerRadius=\"10\" Background=\"#000000\"", strip);
        Assert.Contains("Text=\"{Binding Name, Mode=OneWay}\"", strip);

        // 5. Armed session controls are red, and the running stop button is red — not a grey literal.
        Assert.Contains("x:Key=\"RecordPillToggle\"", theme);
        // One rule for session controls: white ink in every state, the fill carries the state.
        // The missing base foreground is what painted the REC/ON-AIR labels black (2026-10-30).
        var pill = theme[theme.IndexOf("x:Key=\"RecordPillToggle\"", System.StringComparison.Ordinal)..];
        pill = pill[..pill.IndexOf("</Style>", System.StringComparison.Ordinal)];
        Assert.Contains("<Setter Property=\"Foreground\" Value=\"{StaticResource Brush.OnAccent}\"/>", pill);
        Assert.Contains("Brush.Primary", theme);
        Assert.Contains("Style=\"{StaticResource RecordPillToggle}\"", topBar);
        Assert.Contains("Background=\"{StaticResource Brush.Primary}\" Margin=\"14,0,0,0\"", topBar);
        Assert.DoesNotContain("Background=\"#333\"", topBar);

        // 6. No artificial height cap on the properties list: the list fills the row, so a
        //    scrollbar appears only when the content genuinely exceeds the space.
        var listLine = leftPanel.Split('\n').First(line => line.Contains("ElementsScrollViewer"));
        Assert.DoesNotContain("MaxHeight", listLine);
    }

    [Fact]
    public void The_wordmark_ty_stays_youtube_red_and_ctrl_opens_the_context_menu()
    {
        var topBar = SourceAssert.Text("Controls", "TopBar.xaml");
        // Adjacent, with nothing between: whitespace inside a TextBlock between inline Runs
        // collapses to a space and prints "LlamaCas ty" (this exact bug shipped once).
        Assert.Contains("<Run Text=\"LlamaCas\" Foreground=\"{StaticResource Brush.OnSurface}\"/><Run Text=\"ty\" Foreground=\"{StaticResource Brush.Youtube}\"/>", topBar);

        // Plain right-click is the zoom box; the context menu moved to Ctrl+right-click so a
        // creator can change capture sources mid-stream.
        var preview = SourceAssert.Text("Controls", "PreviewPane.xaml.cs");
        Assert.Contains("ModifierKeys.Control", preview);
        Assert.Contains("return;", preview);
    }

    [Fact]
    public void Edit_sits_beside_the_orange_gear()
    {
        var topBar = SourceAssert.Text("Controls", "TopBar.xaml");

        // The gear is a LlamaCasty control, so it wears the app's orange (not a muted icon grey).
        Assert.Contains("Fill=\"{StaticResource Brush.Attention}\" Width=\"18\" Height=\"18\"", topBar);

        // EDIT lives in the LEFT cluster, immediately after the gear — not in the centre session
        // cluster (creator ruling 2026-10-30).
        var edit = topBar.IndexOf("EditingActive", System.StringComparison.Ordinal);
        var centre = topBar.IndexOf("Grid.Column=\"1\"", System.StringComparison.Ordinal);
        Assert.True(edit > 0 && centre > edit,
            "the EDIT toggle must appear before the centre (session) cluster");
    }

    private static int Count(string haystack, string needle)
    {
        var hits = 0;
        for (var i = haystack.IndexOf(needle, System.StringComparison.Ordinal); i >= 0;
             i = haystack.IndexOf(needle, i + needle.Length, System.StringComparison.Ordinal))
            hits++;
        return hits;
    }
}