using BeWo.Data.Access;
using BeWo.Data.Entities;
using BS.Shared;
using BS.Shared.DataContracts;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BeWo.Data.Security
{
    public class UserRightHelper
    {
    public static ApplicationUser GetLoggedInUser()
		{

			if (LoggedInUserOperationContextExt.Current != null &&
				LoggedInUserOperationContextExt.Current.User != null)
			{
				return LoggedInUserOperationContextExt.Current.User;
			}
			else
			{
				return SessionFacade.LoggedInUser;
			}


			return null;
		}

        public static bool LoggedInUserHasRight(UserRightType right)
        {
            return GetGrantedRights(GetLoggedInUser()).Contains(right);

        }

        public static bool UserHasRight(ApplicationUser user, UserRightType right)
        {
            return GetGrantedRights(user).Contains(right);

        }

        public static List<UserRightType> GetGrantedRights(ApplicationUser user)
        {
            var rights = new List<UserRightType>();
            foreach (var ug in user.UserGroups)
            {
                foreach (var rr in ug.Rights)
                {
                    rights.Add(rr.RightType);
                }
            }

            return rights;
        }

        public static String GetBeWoVersion()
        {
            return GetBeWoVersion(GetLoggedInUser().LoginName);
        }

        public static String GetBeWoVersion(String loginName)
        {
            var lastLogins = DAOFactory.SearchDAO.FindLastLogins(loginName, 1).ToList();
            if (lastLogins != null && lastLogins.Count > 0)
            {
                var login = lastLogins[0];
                if (!String.IsNullOrEmpty(login.Referrer))
                {
                    //var test = "MobilClient, Version: Unbekannt";
                    //var test2 = "BeWoClient, Version: Microsoft Windows NT 6.2.9200.0;CLRVersion=4.0.30319.42000;BeWoVersion=Version 3.16;IsNet45OrNewer=True";

                    var str = login.Referrer;

                    var start = str.IndexOf("BeWoVersion=");
                    if (start > 0)
                    {
                        var stop = str.IndexOf(";", start);
                        if (stop > start)
                        {
                            var version = str.Substring(start + 12, stop - start - 12);
                            version = version.Replace("Version", "").Trim();

                            return version;
                        }
                    }
                }
            }
            return "";
        }

        public static void CheckRightVersion(UserDC user)
        {
            var version = GetBeWoVersion(GetLoggedInUser().LoginName);
            CheckRightVersion(version, user);
        }


        public static void CheckRightVersion(UserGroupDC groupDC)
        {
            var version = GetBeWoVersion(GetLoggedInUser().LoginName);
            CheckRightVersion(version, groupDC);
        }
        
        public static void CheckRightVersion(String version, UserDC userDC)
        {                
            foreach (var ug in userDC.UserGroups)
            {
                CheckRightVersion(version, ug);
            }
            
        }

        public static void CheckRightVersion(String version, UserGroupDC ug)
        {
            var allrights = ug.Rights;
            ug.Rights = new List<UserRightType>();
            foreach (var r in allrights)
            {
                if (IsCorrectVersion(r, version))
                {
                    ug.Rights.Add(r);
                }
            }
            
        }

        public static bool IsCorrectVersion(UserRightType r, string version)
        {
            var rightVersion = GetRightVersion(r);

            if (!String.IsNullOrEmpty(version) && version.CompareTo(rightVersion) < 0)
            {
                return false;
            }
            return true;
        }

        public static String GetRightVersion(UserRightType r)
        {
            if (r == UserRightType.Customer_ViewBetreuung || r == UserRightType.Customer_ViewAbsenceTimes)
            {
                return "3.17";
            }
            if (r == UserRightType.AdditionalService_Edit)
            {
                return "3.18";
            }
            if (r == UserRightType.Customer_EditMedication)
            {
                return "3.19";
            }
            if (r == UserRightType.FinanzenRechnungenNachVersandBearbeiten)
            {
                return "3.21";
            }
            return "1.0";
        }
    }
}