using System;
using System.Net;
using System.Runtime.Serialization.Json;
using System.ServiceModel.Channels;
using System.ServiceModel.Dispatcher;
using System.ServiceModel.Web;

namespace Sony.Filtr.API.WCF
{
    public class ErrorHandler : IErrorHandler
    {
        public bool HandleError(Exception error)
        {
            return false;
        }

        public void ProvideFault(Exception error, MessageVersion version, ref Message fault)
        {
            if (error is WebFaultException)
                return;

            ErrorMessageBody result = new ErrorMessageBody()
            {
                Message = "An internal server error occurred: " + error.ToString(),
            };

            fault = Message.CreateMessage(version, "", result, new DataContractJsonSerializer(result.GetType()));

            var jsonFormatting = new WebBodyFormatMessageProperty(WebContentFormat.Json);
            fault.Properties.Add(WebBodyFormatMessageProperty.Name, jsonFormatting);

            var httpResponse = new HttpResponseMessageProperty()
            {
                StatusCode = HttpStatusCode.InternalServerError,
                StatusDescription = "",
            };
            httpResponse.Headers[HttpResponseHeader.ContentType] = "application/json";

            fault.Properties.Add(HttpResponseMessageProperty.Name, httpResponse);

        }

        public class ErrorMessageBody
        {
            public string Message { get; set; }
        }
    }
}