using System;

using System.IO;

using Nest;

using Elasticsearch.Net;

public class Program

{

    public static void Main()

    {

        var query =  

            Query<string>.Terms(q => q.Field("sample").Terms(new string[] { "a", "b" })) && 

            //new QueryContainer();

            Query<string>.Terms(q => q.Field("sample").Terms(new string[] { "c", "d" }));

        //Console.WriteLine(PrintQuery(GetClient(), query));    

        var query2 = Query<dynamic>.Bool(b => b.Must(new QueryContainer[] {

                Query<string>.Terms(q => q.Field("sample").Terms(new string[] { "a", "b" })),

                new QueryContainer()

                //Query<string>.Terms(q => q.Field("sample").Terms(new string[] { "c", "d" }))

            }));

        Console.WriteLine(PrintQuery(GetClient(), query || query2));    

    }

    public static IElasticClient GetClient() {

        var connection = new InMemoryConnection();

        var connectionPool = new SingleNodeConnectionPool(new Uri("http://localhost:9200"));

        var settings = new ConnectionSettings(connectionPool, connection);

        return new ElasticClient(settings);

    }

    public static string PrintQuery(IElasticClient esClient, QueryContainer search) 

    {

        using (var ms = new MemoryStream())

        {

            esClient.Serializer.Serialize(search, ms);

            return System.Text.Encoding.UTF8.GetString(ms.ToArray());

        }

    }

}