using System;
using System.Linq;
using Xunit;
using ytLive.Models;

namespace ytLive.Tests;

/// <summary>TASK 60 — the creator (2026-10-21): *"under Live-&gt;Layers-&gt;webcam-&gt;
/// Properties-&gt;border color: in the drop down box, the #hex values are good, but add a
/// corresponding color name/label next to the value."*
///
/// <para>One test: the palette is the single source of truth for the drop-down (the
/// picker builds its menu from it and carries no list of its own), every entry has a
/// valid hex and a name, the names are unique, the colours the picker used to offer are
/// all still offered, and the lookup answers for a hex the creator typed.</para></summary>
public class BorderColorPaletteTests
{
    [Fact]
    public void The_border_palette_names_every_colour_the_picker_offers()
    {
        // 1. Every entry is a valid hex with a name, and no hex or name repeats.
        Assert.NotEmpty(BorderColorPalette.All);
        foreach (var colour in BorderColorPalette.All)
        {
            Assert.Matches("^#[0-9a-fA-F]{6}$", colour.Hex);
            Assert.False(string.IsNullOrWhiteSpace(colour.Name), $"{colour.Hex} has no name");
        }
        Assert.Equal(BorderColorPalette.All.Count,
            BorderColorPalette.All.Select(c => c.Hex).Distinct(StringComparer.OrdinalIgnoreCase).Count());
        Assert.Equal(BorderColorPalette.All.Count,
            BorderColorPalette.All.Select(c => c.Name).Distinct(StringComparer.OrdinalIgnoreCase).Count());

        // 2. The colours the picker used to offer are all still offered.
        string[] legacy = ["#FFFFFF", "#000000", "#FF0000", "#00FF00", "#0000FF", "#FFFF00",
                           "#FF00FF", "#00FFFF", "#FF8800", "#8800FF", "#e94560", "#22c55e",
                           "#3b82f6", "#f59e0b"];
        foreach (var hex in legacy)
            Assert.Contains(BorderColorPalette.All, c => c.Hex == hex);

        // 3. The lookup answers for a hex in any case, and keeps an unknown hex as-is.
        Assert.Equal("Crimson", BorderColorPalette.NameOf("#e94560"));
        Assert.Equal("Crimson", BorderColorPalette.NameOf("#E94560"));
        Assert.Equal("White", BorderColorPalette.NameOf(" #ffffff "));
        Assert.Equal("#123456", BorderColorPalette.NameOf("#123456"));

        // 4. The picker builds its menu from the catalogue — there is no second list.
        var source = SourceAssert.Text("Controls", "LeftPanel.xaml.cs");
        Assert.True(source.Contains("BorderColorPalette"),
            "the border picker does not build its menu from the palette");
        Assert.False(source.Contains("\"#FFFFFF\""),
            "the border picker still carries its own list of colours");
    }
}