using System.Net;

using YandexMusic.API.Models.Common;

namespace YandexMusic.API.Common.Providers
{
    /// <summary>
    /// Стандартный провайдер запросов
    /// </summary>
    public class DefaultRequestProvider : CommonRequestProvider
    {
        #region Вспомогательные функции

        private Exception ProcessException(Exception ex)
        {
            if (ex is not WebException webException)
                return ex;

            if (webException.Response is null)
                return ex;

            Stream s = webException.Response.GetResponseStream();
            if (s is null)
                return ex;

            using StreamReader sr = new(s);
            string result = sr.ReadToEnd();

            YErrorResponse exception = JsonConvert.DeserializeObject<YErrorResponse>(result);

            return exception ?? ex;
        }

        #endregion Вспомогательные функции



        public DefaultRequestProvider(AuthStorage authStorage) : base(authStorage)
        {
        }



        #region IRequestProvider

        public override Task<HttpResponseMessage> GetWebResponseAsync(HttpRequestMessage message,
            HttpCompletionOption completionOption = HttpCompletionOption.ResponseContentRead)
        {
            try
            {
                HttpClient client = new(new SocketsHttpHandler
                {
                    Proxy = storage.Context.WebProxy,
                    AutomaticDecompression = DecompressionMethods.GZip,
                    UseCookies = true,
                    CookieContainer = storage.Context.Cookies,
                });

                return client.SendAsync(message, completionOption);
            }
            catch (Exception ex)
            {
                throw ProcessException(ex);
            }
        }

        #endregion IRequestProvider
    }
}