namespace ConsoleApplication
{
    using System;
    using System.Threading.Tasks;
    using GraphQL;
    using GraphQL.Http;
    using GraphQL.Types;

    public class Program
    {
        public static void Main(string[] args)
        {
          Run();
        }

        private static async void Run()
        {
          Console.WriteLine("Hello GraphQL!");

          var schema = new Schema { Query = new StarWarsQuery() };

          var result = await ExecuteQuery(
            schema, @"
            query {
              hero {
                id
                name
              }
            }
          ");
          Console.WriteLine(result);
        }

      private static async Task<string> ExecuteQuery(
        Schema schema,
        string query,
        object rootObject = null,
        string operationName = null,
        Inputs inputs = null,
        object userContext = null)
      {
        var executer = new DocumentExecuter();
        var writer = new DocumentWriter(indent: true);

        var result = await executer.ExecuteAsync(
          schema,
          rootObject,
          query,
          operationName,
          inputs,
          userContext).ConfigureAwait(false);
        return writer.Write(result);
      }
    }

    public class Droid
    {
      public string Id { get; set; }
      public string Name { get; set; }
    }

    public class StarWarsQuery : ObjectGraphType
    {
      public StarWarsQuery()
      {
        Name = "Query";
        Field<DroidType>(
          "hero",
          resolve: context => new Droid { Id = "1", Name = "R2-D2" }
        );
      }
    }

    public class DroidType : ObjectGraphType
    {
      public DroidType()
      {
        Name = "Droid";
        Field<NonNullGraphType<StringGraphType>>("id", "The id of the droid.");
        Field<StringGraphType>("name", "The name of the droid.");
        IsTypeOf = value => value is Droid;
      }
    }
}