using System.Collections.Generic;
using System.Net.Http;
using System.Text.Json;
using System.Threading.Tasks;

using Amazon.Lambda.Core;
using Amazon.Lambda.APIGatewayEvents;

// Assembly attribute to enable the Lambda function's JSON input to be converted into a .NET class.
[assembly: LambdaSerializer(typeof(Amazon.Lambda.Serialization.SystemTextJson.DefaultLambdaJsonSerializer))]

namespace HelloWorld
{
    public class FunctionWithOnlyLambdaContext
    {
        public async object Handler(ILambdaContext context)
        {
            var body = new Dictionary<string, string>
            {
                { "message", "hello world" },
            };

            return new APIGatewayProxyResponse
            {
                Body = JsonSerializer.Serialize(body),
                StatusCode = 200,
                Headers = new Dictionary<string, string> { { "Content-Type", "application/json" } }
            };
        }
    }
}