using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;
using Xunit;
using ytLive.Models;

namespace ytLive.Tests;

/// <summary>TASK 62 — the creator (2026-10-21): *"the border color drop down box content
/// should also include the name of the color next to the hex value as they in the drop-down
/// list box."*
///
/// <para>One test: the model carries the palette's name for the current border colour
/// (and nothing for a custom hex the creator typed), the name raises when the colour
/// changes, and the panel shows it right next to the hex field — which keeps a fixed
/// width so the name stays beside the hex instead of drifting to the far edge.</para></summary>
public class BorderColorNameTests
{
    [Fact]
    public void The_border_colour_field_shows_the_colour_name_next_to_the_hex()
    {
        // ── The model: the name of the current colour, and nothing for a custom hex ──
        var element = new WebcamSceneConfig { Name = "Webcam" };
        var raised = new List<string?>();
        element.PropertyChanged += (_, e) => raised.Add(e.PropertyName);

        element.BorderColor = "#e94560";
        Assert.Equal("Crimson", element.BorderColorName);
        Assert.Contains("BorderColorName", raised);

        raised.Clear();
        element.BorderColor = "#123456";
        Assert.Equal("", element.BorderColorName);   // a custom hex has no name
        Assert.Contains("BorderColorName", raised);

        // ── The panel: the name sits right next to the hex field ──────────────────
        var doc = XDocument.Load(SourceAssert.RepoPath("Controls", "LeftPanel.xaml"));
        var title = doc.Descendants().Single(e => e.Name.LocalName == "TextBlock"
            && (string?)e.Attribute("Text") == "Border Color");
        var row = title.ElementsAfterSelf().First(e => e.Name.LocalName == "DockPanel");

        var field = row.Descendants().Single(e => e.Name.LocalName == "TextBox");
        var name = row.Descendants().Single(e => e.Name.LocalName == "TextBlock"
            && ((string?)e.Attribute("Text") ?? "").Contains("BorderColorName"));

        // The hex field has a fixed width, so the name stays beside the hex.
        Assert.False(string.IsNullOrWhiteSpace((string?)field.Attribute("Width")),
            "the hex field has no fixed width — the name would drift to the far edge");

        // The name is in the same horizontal row as the field, after it.
        Assert.Equal(field.Parent, name.Parent);
        var order = field.Parent!.Elements().ToList();
        Assert.True(order.IndexOf(field) < order.IndexOf(name),
            "the colour name comes before the hex field");
    }
}