using ModpackUpdater.Model;
using Unleash;

namespace ModpackUpdater;

public enum AppFeatures
{
    AllowExtras
}

public static class AppFeaturesExtensions
{
    private const string apiUrl = "https://git.pilzinsel64.de/api/v4/feature_flags/unleash/2";
    private const string instanceId = "glffct-3vCzJXChAnxjsgvoHijR";

    private static IUnleash api;
    private static UnleashContext context;
    private static UnleashSettings settings;

    public static bool IsEnabled(this AppFeatures feature, AppFeatureContext context)
    {
        return feature switch
        {
            AppFeatures.AllowExtras => CheckFeature("allow-extras", false, context),
            _ => throw new NotSupportedException(),
        };
    }

    public static bool IsEnabled(this AppFeatures feature)
    {
        return feature switch
        {
            _ => throw new NotSupportedException(),
        };
    }

    private static bool InitializeApi()
    {
        if (api == null)
        {
            settings = new UnleashSettings
            {
                AppName = "Modpack Updater",
                UnleashApi = new Uri(apiUrl),
                FetchTogglesInterval = TimeSpan.FromSeconds(60 * 5),
                InstanceTag = instanceId,
            };

            api = new DefaultUnleash(settings);
        }

        return api != null;
    }

    private static bool CheckFeature(string name, bool defaultValue, AppFeatureContext context)
    {
        return InitializeApi() && api.IsEnabled(name, GetContext(context), defaultValue);
    }

    private static UnleashContext GetContext(AppFeatureContext ccontext)
    {
        context ??= new();
        context.CurrentTime = DateTime.Now;
        ccontext?.Apply(context);
        return context;
    }
}

public abstract class AppFeatureContext
{
    public abstract void Apply(UnleashContext context);
}

public class AllowExtrasFeatureContext(ModpackInfo info, ModpackConfig config) : AppFeatureContext
{
    public override void Apply(UnleashContext context)
    {
        context.UserId = info.ExtrasKey;
        context.Environment = config.Key;
    }
}