using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Http.Features;
using Umbraco.Cms.Core.Net;
using Umbraco.Cms.Core.Web;

namespace Umbraco.Cms.Web.Common.AspNetCore
{
    internal class AspNetCoreSessionManager : ISessionIdResolver, ISessionManager
    {
        private readonly IHttpContextAccessor _httpContextAccessor;

        public AspNetCoreSessionManager(IHttpContextAccessor httpContextAccessor)
        {
            _httpContextAccessor = httpContextAccessor;
        }

        /// <summary>
        /// If session isn't enabled this will throw an exception so we check
        /// </summary>
        private bool IsSessionsAvailable => !(_httpContextAccessor.HttpContext?.Features.Get<ISessionFeature>() is null);

        public string? SessionId
        {
            get
            {
                HttpContext? httpContext = _httpContextAccessor?.HttpContext;

                return IsSessionsAvailable
                    ? httpContext?.Session?.Id
                    : "0";
            }
        }

        public string? GetSessionValue(string key)
        {
            if (!IsSessionsAvailable)
            {
                return null;
            }

            return _httpContextAccessor.HttpContext?.Session.GetString(key);
        }


        public void SetSessionValue(string key, string value)
        {
            if (!IsSessionsAvailable)
            {
                return;
            }

            _httpContextAccessor.HttpContext?.Session.SetString(key, value);
        }

        public void ClearSessionValue(string key)
        {
            if (!IsSessionsAvailable)
            {
                return;
            }

            _httpContextAccessor.HttpContext?.Session.Remove(key);
        }
    }
}