using Freelancers.Infrastructure;
using Freelancers.Infrastructure.Helpers;
using Freelancers.Model;
using Freelancers.Services.Interfaces;

namespace Freelancers.UI.Helpers
{
    public class SessionHelper : ISessionHelper
    {
        private const string AuthenticatedUserKey = "AuthenticatedUser";
        private readonly IUserService _userService;

        public SessionHelper(IUserService userService)
        {
            _userService = userService;
        }

        public User AuthenticatedUser()
        {
            var httpContext = HttpContextFactory.Current;
            Ensure.NotNull(httpContext, "httpContext");

            if (httpContext.Session != null)
            {
                var currentUser = (User) httpContext.Session[AuthenticatedUserKey];
                if (currentUser == null && httpContext.User.Identity.IsAuthenticated)
                {
                    currentUser = _userService.GetUser(httpContext.User.Identity.Name);

                    httpContext.Session[AuthenticatedUserKey] = currentUser;
                }

                return currentUser;
            }

            return null;
        }

        public void Clear()
        {
            var httpContext = HttpContextFactory.Current;
            Ensure.NotNull(httpContext, "httpContext");

            if (httpContext.Session != null)
                httpContext.Session.Clear();
        }
    }
}