using Microsoft.AspNetCore.Http;
using Newtonsoft.Json;

namespace BuddyFinance.Admin
{
    public static class SessionExtensions
    {
        public static void Set<T>(this ISession session, string key, T value)
        {
            session.SetString(key, JsonConvert.SerializeObject(value));
        }

        public static T Get<T>(this ISession session, string key)
        {
            var value = session.GetString(key);
            return value == null ? default(T) :
                                  JsonConvert.DeserializeObject<T>(value);
        }
    }

    public class SessionManager
    {
        private const string SESSION_KEY = "BuddyFinance";

        /// <summary>
        /// Currently logged-in user
        /// </summary>
        public SystemUser CurrentUser { get; set; }

        public static IHttpContextAccessor _httpContextAccessor;

        public SessionManager()
        {

        }

        public SessionManager(IHttpContextAccessor httpContextAccessor)
        {
            //CurrentUser = new SystemUser();
            _httpContextAccessor = httpContextAccessor;
        }

        public static SessionManager Current
        {
            get
            {
                if (_httpContextAccessor == null)
                    return null;
                //if (_httpContextAccessor.HttpContext.Session.Get<SessionManager>(SESSION_KEY) == null)
                //{
                //    _httpContextAccessor.HttpContext.Session.Set<SessionManager>(SESSION_KEY, new SessionManager());
                //}

                return _httpContextAccessor.HttpContext.Session.Get<SessionManager>(SESSION_KEY);
            }
        }

        public static void StartSession(IHttpContextAccessor httpContextAccessor)
        {
            _httpContextAccessor.HttpContext.Session.Set<SessionManager>(SESSION_KEY, new SessionManager(httpContextAccessor));
        }

        public static void StartSession(IHttpContextAccessor httpContextAccessor, SystemUser systemUser)
        {
            var session = new SessionManager(httpContextAccessor)
            {
                CurrentUser = systemUser
            };

            _httpContextAccessor.HttpContext.Session.Set<SessionManager>(SESSION_KEY, session);

        }

        public static void ClearSession()
        {
            _httpContextAccessor?.HttpContext.Session.Set<SessionManager>(SESSION_KEY, null);
        }

    }
}