using Microsoft.AspNetCore.Authorization;
using YLErp.Configuration;

namespace YLErp.Web
{
    /// <summary>
    /// 
    /// </summary>
    public class ErpAuthorizeHandler
    {
        public bool Handle(AuthorizationHandlerContext context)
        {
            UserInfo userInfo = null;

            var userId = context.User.GetUserId();

            if (userId < 1)
            {
                return false;
            }

            var userToken = "0";
            var UseSingleLogin = PS.Config.UseSingleLogin;
            if (UseSingleLogin)
            {
                userToken = context.User.GetUserToken() ?? "0";
            }

            userInfo = Server.CacheProvider.Get("loginUser^" + userId) as UserInfo;

            if (userInfo != null)
            {
                if (UseSingleLogin && userInfo.UserToken != userToken)
                {
                    return false;
                }

                if (context.Resource is HttpContext httpContext && httpContext.Request.Headers["X-Requested-With"] == "XMLHttpRequest")
                {
                    return true;
                }
            }

            if (PS.Config.Company == CompanyEnum.国泰君安 && CheckLoginTimeout(context.User.GetUserLoginTime()))
            {
                return false;
            }

            if (userInfo != null)
            {
                return true;
            }

            var predicate = PredicateBuilder.Create<SystemUser>(n => n.Id == userId);
            if (UseSingleLogin && userToken != AuthHelper.JwtUserToken)
            {
                predicate = predicate.And(n => n.UserToken == userToken);
            }

            using (var db = new ErpBaseContext())
            {
                var dbUser = db.SystemUsers.FirstOrDefault(predicate);
                if (dbUser == null)
                {
                    return false;
                }
                userInfo = UserInfo.FromDbUser(dbUser);
                Server.CacheProvider.SetWithSlidingExpiration("loginUser^" + dbUser.Id, userInfo, TimeSpan.FromMinutes(30));
                return true;
            }
        }

        static readonly TimeSpan NightOpenTime = new TimeSpan(20, 32, 0);

        private static bool CheckLoginTimeout(DateTime createTime)
        {
            var now = DateTime.Now;

            if (now.Hour < 8)
            {
                return false;
            }

            if (createTime.Hour < 8 || createTime.Day != now.Day)
            {
                return true;
            }

            if (now.TimeOfDay < NightOpenTime)
            {
                return false;
            }

            if (createTime.TimeOfDay < NightOpenTime)
            {
                return true;
            }

            return false;
        }

        public static readonly ErpAuthorizeHandler Default;

        static ErpAuthorizeHandler()
        {
            Default = new ErpAuthorizeHandler();
        }
    }
}