using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Nacos.V2.DependencyInjection;

namespace Ocelot.Provider.Nacos.NacosClient.V2;

public static class ServiceCollectionExtensions
{
    /// <summary>
    /// Add Nacos AspNet. This will register and de-register instance automatically.
    /// Mainly for nacos server 2.x
    /// </summary>
    /// <param name="services">services.</param>
    /// <param name="configuration">configuration</param>
    /// <returns>IServiceCollection</returns>
    public static IServiceCollection AddNacosAspNet(this IServiceCollection services, IConfiguration configuration)
    {
        services.Configure<NacosAspNetOptions>(configuration.GetSection("nacos"));
        services.AddNacosV2Naming(configuration);
        services.AddSingleton<RegSvcBgTask>();

        return services;
    }

    /// <summary>
    /// Add Nacos AspNet. This will register and de-register instance automatically.
    /// Mainly for nacos server 2.x
    /// </summary>
    /// <param name="services">services</param>
    /// <param name="optionsAccs">optionsAccs</param>
    /// <returns>IServiceCollection</returns>
    public static IServiceCollection AddNacosAspNet(this IServiceCollection services, Action<NacosAspNetOptions> optionsAccs)
    {
        services.Configure(optionsAccs);

        var options = new NacosAspNetOptions();
        optionsAccs.Invoke(options);
        services.AddNacosV2Naming(x => options.BuildSdkOptions());
        services.AddSingleton<RegSvcBgTask>();

        return services;
    }


    public static async Task<IApplicationBuilder> UseNacosAspNet(this IApplicationBuilder app, IHostApplicationLifetime lifetime)
    {
        RegSvcBgTask regSvcBgTask = app.ApplicationServices.GetRequiredService<RegSvcBgTask>();
        await regSvcBgTask.StartAsync();
        lifetime.ApplicationStopping.Register(async () => {
            await regSvcBgTask.StopAsync();
        });
        return app;
    }
}