using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;

namespace DS.Module.Core.Modules;

public static class AppModuleExtensions
{
    public static IServiceCollection AddApplication<T>(this IServiceCollection services) where T : IDSAppModule
    {
        services.AddApplication(typeof(T));
        return services;
    }

    private static IServiceCollection AddApplication(this IServiceCollection services, Type type)
    {
        if (services == null)
        {
            throw new ArgumentNullException(nameof(services));
        }
        var obj = new ObjectAccessor<IApplicationBuilder>();
        services.Add(ServiceDescriptor.Singleton(typeof(ObjectAccessor<IApplicationBuilder>), obj));
        services.Add(ServiceDescriptor.Singleton(typeof(IObjectAccessor<IApplicationBuilder>), obj));
        IStartupModuleRunner runner = new StartupModuleRunner(type, services);
        runner.ConfigureServices(services);
        return services;
    }

    public static IApplicationBuilder InitializeApplication(this IApplicationBuilder builder)
    {
        builder.ApplicationServices.GetRequiredService<ObjectAccessor<IApplicationBuilder>>().Value = builder;
        var runner = builder.ApplicationServices.GetRequiredService<IStartupModuleRunner>();
        runner.Initialize(builder.ApplicationServices);
        return builder;
    }
}