using System.Text.RegularExpressions;

namespace SQLInsight.Community.Tests;

/// <summary>
/// A table cell must stay a table cell. A class that sets display: flex or grid turns a &lt;td&gt;/&lt;th&gt; into a flex box,
/// so it gets its own height and border and the row's divider jumps (the severity badges on the overviews did that).
/// Such classes belong on an element inside the cell. Checked for every site's stylesheet against its own pages.
/// </summary>
public sealed partial class TableMarkupTests
{
    [Theory]
    [InlineData("SQLInsight.Web")]
    [InlineData("SQLInsight.Hub")]
    [InlineData("SQLInsight.Community")]
    public void No_table_cell_has_a_flex_or_grid_class(string project)
    {
        var folder = Path.Combine(RepositoryRoot(), "src", project);
        var layoutClasses = Directory.EnumerateFiles(Path.Combine(folder, "wwwroot"), "*.css", SearchOption.AllDirectories)
            .SelectMany(css => FlexOrGridRule().Matches(File.ReadAllText(css)))
            .SelectMany(rule => ClassName().Matches(rule.Groups["selectors"].Value).Select(c => c.Groups[1].Value))
            .ToHashSet(StringComparer.Ordinal);

        var offenders = Directory.EnumerateFiles(folder, "*.razor", SearchOption.AllDirectories)
            .Where(file => !file.Contains($"{Path.DirectorySeparatorChar}bin{Path.DirectorySeparatorChar}", StringComparison.Ordinal)
                           && !file.Contains($"{Path.DirectorySeparatorChar}obj{Path.DirectorySeparatorChar}", StringComparison.Ordinal))
            .SelectMany(file => CellClass().Matches(File.ReadAllText(file))
                .SelectMany(cell => cell.Groups["classes"].Value.Split(' ', StringSplitOptions.RemoveEmptyEntries))
                .Where(layoutClasses.Contains)
                .Select(c => $"{Path.GetFileName(file)}: <td/th class=\"{c}\">"))
            .ToList();

        Assert.True(offenders.Count == 0, "Flyt klassen ind på et element i cellen: " + string.Join(", ", offenders));
    }

    private static string RepositoryRoot()
    {
        var root = AppContext.BaseDirectory;
        while (!File.Exists(Path.Combine(root, "SQLInsight.slnx")))
        {
            root = Path.GetDirectoryName(root) ?? throw new InvalidOperationException("SQLInsight.slnx ikke fundet.");
        }

        return root;
    }

    // A rule whose declarations set display to (inline-)flex or (inline-)grid; media queries are fine, their inner rules match.
    [GeneratedRegex(@"(?<selectors>[^{}]+)\{[^{}]*\bdisplay\s*:\s*(inline-)?(flex|grid)\b")]
    private static partial Regex FlexOrGridRule();

    [GeneratedRegex(@"\.([A-Za-z][\w-]*)")]
    private static partial Regex ClassName();

    // Literal class names only; Razor expressions (@…) in the attribute are skipped by splitting on spaces.
    [GeneratedRegex(@"<t[dh]\b[^>]*\bclass=""(?<classes>[^""]*)""")]
    private static partial Regex CellClass();
}