using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using StellaOps.Scanner.Surface.Env;

namespace StellaOps.Scanner.Surface.Env.Tests;

public sealed class SurfaceEnvironmentFeatureFlagTests
{
    [Fact]
    public void Build_ReturnsFlags_LowerCased()
    {
        Environment.SetEnvironmentVariable("SCANNER_SURFACE_FEATURES", "Validation,PreWarm , unknown");
        Environment.SetEnvironmentVariable("SCANNER_SURFACE_FS_ENDPOINT", "https://surface.example.test");
        try
        {
            var services = CreateServices();
            var environment = SurfaceEnvironmentFactory.Create(services, options =>
            {
                options.KnownFeatureFlags.Add("validation");
                options.KnownFeatureFlags.Add("prewarm");
                options.RequireSurfaceEndpoint = true;
            });

            Assert.Contains("validation", environment.Settings.FeatureFlags);
            Assert.Contains("prewarm", environment.Settings.FeatureFlags);
            Assert.Contains("unknown", environment.Settings.FeatureFlags);
        }
        finally
        {
            Environment.SetEnvironmentVariable("SCANNER_SURFACE_FEATURES", null);
            Environment.SetEnvironmentVariable("SCANNER_SURFACE_FS_ENDPOINT", null);
        }
    }

    private static IServiceProvider CreateServices()
    {
        var services = new ServiceCollection();
        services.AddSingleton<IConfiguration>(new ConfigurationBuilder().Build());
        services.AddLogging(builder => builder.ClearProviders());
        return services.BuildServiceProvider();
    }
}