using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Ocelot.Configuration;
using Ocelot.Configuration.Repository;
using Ocelot.Middleware;
using Ocelot.Provider.Nacos.NacosClient.V2;

namespace Ocelot.Provider.Nacos;

public class NacosMiddlewareConfigurationProvider
{
    public static OcelotMiddlewareConfigurationDelegate Get = builder =>
    {
        var internalConfigRepo = builder.ApplicationServices.GetService<IInternalConfigurationRepository>();
        var config = internalConfigRepo.Get();

        var hostLifetime = builder.ApplicationServices.GetService<IHostApplicationLifetime>();

        if (UsingNacosServiceDiscoveryProvider(config.Data))
        {
            builder.UseNacosAspNet(hostLifetime).GetAwaiter().GetResult();
        }

        return Task.CompletedTask;
    };

    private static bool UsingNacosServiceDiscoveryProvider(IInternalConfiguration configuration)
    {
        return configuration?.ServiceProviderConfiguration != null && configuration.ServiceProviderConfiguration.Type?.ToLower() == "nacos";
    }
}