namespace Gameboard.ShogiUI.Sockets
{
  namespace anonymous_session.Middlewares
  {
    using Microsoft.AspNetCore.Http;
    using Microsoft.AspNetCore.Authentication;
    using System.Security.Claims;

    /// <summary>
    /// TODO: Use this example in the guest session logic instead of custom claims.
    /// </summary>
    public class AnonymousSessionMiddleware
    {
      private readonly RequestDelegate _next;

      public AnonymousSessionMiddleware(RequestDelegate next)
      {
        _next = next;
      }

      public async System.Threading.Tasks.Task InvokeAsync(HttpContext context)
      {
        if (!context.User.Identity.IsAuthenticated)
        {
          if (string.IsNullOrEmpty(context.User.FindFirstValue(ClaimTypes.Anonymous)))
          {
            var claim = new Claim(ClaimTypes.Anonymous, System.Guid.NewGuid().ToString());
            context.User.AddIdentity(new ClaimsIdentity(new[] { claim }));

            string scheme = Microsoft.AspNetCore.Authentication.Cookies.CookieAuthenticationDefaults.AuthenticationScheme;
            await context.SignInAsync(scheme, context.User, new AuthenticationProperties { IsPersistent = false });
          }
        }

        await _next(context);
      }
    }
  }
}