using System.Text.RegularExpressions;

namespace Volcanic.AgenticCore.Telegram.Tests;

/// <summary>Values the repo-root <c>docker-compose.yml</c> copies from the host's code.</summary>
public sealed class DockerComposeTests
{
    [Fact]
    public void Compose_model_fallback_matches_TelegramOptions_DefaultModel()
    {
        var compose = File.ReadAllText(RepoFile("docker-compose.yml"));
        var matches = Regex.Matches(compose, @"Telegram__Model=\$\{TELEGRAM_MODEL:-(?<model>[^}]+)\}");

        var match = Assert.Single(matches);
        Assert.Equal(TelegramOptions.DefaultModel, match.Groups["model"].Value);
    }

    /// <summary>A file in the repository root, found by walking up from the test output to <c>VolcanicAgenticCore.slnx</c>.</summary>
    private static string RepoFile(string name)
    {
        for (var dir = new DirectoryInfo(AppContext.BaseDirectory); dir is not null; dir = dir.Parent)
        {
            if (File.Exists(Path.Combine(dir.FullName, "VolcanicAgenticCore.slnx"))) return Path.Combine(dir.FullName, name);
        }
        throw new InvalidOperationException("VolcanicAgenticCore.slnx not found above " + AppContext.BaseDirectory);
    }
}