public static string RecommendRequest(RecommendRequestObj data)
        {
            using (var context = new SalesReturndbEntities())
            {
                string RequestProcessType = "recommended";
                var    RequestDetail      = context.tblRequestDtls.Where(x => x.RequestHeaderId == data.Request_Id && x.IsActive == true).ToList();
                var    approvalHeader     = context.TblApproverHeaders.Where(x => x.Request_Id == data.Request_Id && x.IsActive == true).FirstOrDefault();
                var    ReqHdrDetail       = context.SP_GetRequestDetail(data.Request_Id).FirstOrDefault();
                var    RequestHdr         = context.TblRequestHeaders.Where(x => x.RequestHeaderId == data.Request_Id && x.IsActive == true).FirstOrDefault();
                var    UserDetail         = context.SP_LFGDetails(approvalHeader.CreatedBy).FirstOrDefault();
                var    Reqfuturestatus    = context.TblFutureStatus.Where(x => x.IsActive == true && x.Request_ID == ReqHdrDetail.RequestHeaderId).OrderByDescending(y => y.FutStatus_ID).FirstOrDefault();

                string AssignedTo = "";

                string Message = "";

                var CurrStatus     = 0;
                var FutStatus      = 0;
                var Active_role    = 0;
                var Requested_role = 0;

                decimal? TotalSRV_Value = 0;
                DateTime date           = DateTime.Now;
                double   InvoiceAge     = 0;

                //int FutureStatus_Id = 0;
                foreach (var pt in RequestDetail)
                {
                    TotalSRV_Value = TotalSRV_Value + pt.SRVValue;
                    // getting invoice age from the oldest invoice date.
                    double InvoiceDateAge = DateTime.Now.Subtract(pt.InvoiceDate.Value).Days / (365.25 / 12);
                    if (InvoiceAge <= InvoiceDateAge)
                    {
                        InvoiceAge = InvoiceDateAge;
                    }
                }

                //var ApprovalMatrixData = context.TblApprovalMatrices.Where(x => x.RequestType == data.RequestType_Id && x.Country.Equals(data.Country) && x.BUType.Equals(UserDetail.SBU_Name) && x.Division.Equals(UserDetail.Dept_name) && x.IsActive == true).FirstOrDefault();
                var FlowMatrixValue    = context.TblFlowMatrices.Where(x => x.RequestType == data.RequestType_Id && x.Options.Equals("Value") && x.IsActive == true).FirstOrDefault();
                var FlowMatrixPeriod   = context.TblFlowMatrices.Where(x => x.RequestType == data.RequestType_Id && x.Options.Equals("Period") && x.IsActive == true).FirstOrDefault();
                var EmployeeMatrixData = context.TblEmployeeMasters.Where(x => x.IsActive == true && x.DepotName == ReqHdrDetail.DepotName).FirstOrDefault();

                if (FlowMatrixValue != null && FlowMatrixPeriod != null && EmployeeMatrixData != null)
                {
                    if (approvalHeader.Status_Id == 1)
                    {
                        if (data.RequestType_Id == 1)
                        {
                            if (EmployeeMatrixData.ComplaintManager != null || EmployeeMatrixData.ComplaintManager != "")
                            {
                                if (TotalSRV_Value <= FlowMatrixValue.ComplaintHandler && InvoiceAge <= FlowMatrixPeriod.ComplaintHandler)
                                {
                                    AssignedTo = EmployeeMatrixData.ComplaintManager;
                                }
                                else
                                {
                                    AssignedTo           = UserDetail.President_Code;
                                    data.Requested_Role  = 6;
                                    data.FutureStatus_Id = 9;
                                }
                                if (data.EmployeeCode.Equals(AssignedTo))
                                {
                                    //auto approval code here.
                                    ApproverDAL.UpdateRequestStatus(false, Convert.ToInt32(data.Request_Id), data.EmployeeCode, AssignedTo, data.Active_Role, data.Requested_Role, data.CurrentStatus_Id, data.FutureStatus_Id, data.Remarks);

                                    if (TotalSRV_Value <= FlowMatrixValue.ComplaintHandler && InvoiceAge <= FlowMatrixPeriod.ComplaintHandler)
                                    {
                                        //Recommeneded complaint manager.
                                        CurrStatus     = 12;
                                        FutStatus      = 9;
                                        Active_role    = 3;
                                        Requested_role = 6;
                                    }
                                    else
                                    {
                                        //Approve complaint manager.
                                        CurrStatus     = 16;
                                        FutStatus      = 0;
                                        Active_role    = 3;
                                        Requested_role = 0;
                                    }

                                    data.Active_Role      = Active_role;
                                    data.Requested_Role   = Requested_role;
                                    data.CurrentStatus_Id = CurrStatus;
                                    data.FutureStatus_Id  = FutStatus;
                                }
                            }
                            else
                            {
                                return("Error : Complaint Manager is not defined in Approval Matrix");
                            }
                        }

                        else if (data.RequestType_Id == 2)
                        {
                            if (EmployeeMatrixData.ISC != null || EmployeeMatrixData.ISC != "")
                            {
                                if (TotalSRV_Value <= FlowMatrixValue.LogisticsHead && InvoiceAge <= FlowMatrixPeriod.LogisticsHead)
                                {
                                    AssignedTo = EmployeeMatrixData.ISC;
                                }
                                else
                                {
                                    AssignedTo           = UserDetail.President_Code;
                                    data.Requested_Role  = 6;
                                    data.FutureStatus_Id = 9;
                                }

                                //AssignedTo = EmployeeMatrixData.LogisticsHead;
                                if (data.EmployeeCode.Equals(AssignedTo))
                                {
                                    //auto approval code here.
                                    ApproverDAL.UpdateRequestStatus(false, Convert.ToInt32(data.Request_Id), data.EmployeeCode, AssignedTo, data.Active_Role, data.Requested_Role, data.CurrentStatus_Id, data.FutureStatus_Id, data.Remarks);

                                    if (TotalSRV_Value <= FlowMatrixValue.LogisticsHead && InvoiceAge <= FlowMatrixPeriod.LogisticsHead)
                                    {
                                        //Recommeneded Logictic Head/ VP.
                                        CurrStatus     = 13;
                                        FutStatus      = 9;
                                        Active_role    = 5;
                                        Requested_role = 6;
                                    }
                                    else
                                    {
                                        //Approve Logictic Head/ VP.
                                        CurrStatus     = 16;
                                        FutStatus      = 0;
                                        Active_role    = 5;
                                        Requested_role = 0;
                                    }

                                    data.Active_Role      = Active_role;
                                    data.Requested_Role   = Requested_role;
                                    data.CurrentStatus_Id = CurrStatus;
                                    data.FutureStatus_Id  = FutStatus;
                                }
                            }
                            else
                            {
                                return("Error : Logistic Head is not set in Approval Matrix");
                            }
                        }
                        else if (data.RequestType_Id == 3)
                        {
                            var ReqHdr = context.TblRequestHeaders.Where(x => x.RequestHeaderId == data.Request_Id && x.IsActive == true).FirstOrDefault();

                            if (ReqHdr.RequestTypeOption == "D")
                            {
                                //In D type request we will refer VP/SH/President of RM not of requester

                                var RM_Trail = context.SP_LFGDetails(data.EmployeeCode).FirstOrDefault();
                                if (TotalSRV_Value <= FlowMatrixValue.VP && InvoiceAge <= FlowMatrixPeriod.VP)
                                {
                                    if (RM_Trail.VPHead != "NA" && RM_Trail.VPHead != "" && RM_Trail.VPHead != null)
                                    {
                                        AssignedTo           = UserDetail.VPHead;
                                        data.FutureStatus_Id = 8; //Pending Sales Director / VP Head;
                                        data.Requested_Role  = 9;

                                        if (data.EmployeeCode.Equals(AssignedTo))
                                        {
                                            //auto approval code here.
                                            ApproverDAL.UpdateRequestStatus(false, Convert.ToInt32(data.Request_Id), data.EmployeeCode, AssignedTo, data.Active_Role, data.Requested_Role, data.CurrentStatus_Id, data.FutureStatus_Id, data.Remarks);

                                            data.Active_Role      = 9;
                                            data.Requested_Role   = 0;
                                            data.CurrentStatus_Id = 16;
                                            data.FutureStatus_Id  = 0;
                                        }
                                    }
                                    else
                                    {
                                        return("Error : Sales Director/VP Head is not Defined.");
                                    }
                                }
                                else
                                {
                                    if (RM_Trail.President_Code != "NA" && RM_Trail.President_Code != "" && RM_Trail.President_Code != null)
                                    {
                                        AssignedTo           = UserDetail.President_Code;
                                        data.FutureStatus_Id = 9;//Pending President
                                        data.Requested_Role  = 6;

                                        if (data.EmployeeCode.Equals(AssignedTo))
                                        {
                                            //auto approval code here.
                                            ApproverDAL.UpdateRequestStatus(false, Convert.ToInt32(data.Request_Id), data.EmployeeCode, AssignedTo, data.Active_Role, data.Requested_Role, data.CurrentStatus_Id, data.FutureStatus_Id, data.Remarks);

                                            data.Active_Role      = 6;
                                            data.Requested_Role   = 0;
                                            data.CurrentStatus_Id = 16;
                                            data.FutureStatus_Id  = 0;
                                        }
                                    }
                                    else
                                    {
                                        return("Error : President code is not in LFG.");
                                    }
                                }
                            }
                            else
                            {
                                if (TotalSRV_Value <= FlowMatrixValue.SegmentHead && InvoiceAge <= FlowMatrixPeriod.SegmentHead)
                                {
                                    var DealerDtl = context.sp_GetDealerDtlBy_DealerRepositoryId(ReqHdr.DealerId).FirstOrDefault();
                                    // if (DealerDtl!=null)
                                    if (UserDetail.segmentHead != "NA" && UserDetail.segmentHead != "" && UserDetail.segmentHead != null)
                                    {
                                        //AssignedTo = context.SP_LFGDetailsBasedOnName(DealerDtl.Segment).FirstOrDefault().EMP_CODE;
                                        if (UserDetail.segmentHead != "NA" && UserDetail.segmentHead != "" && UserDetail.segmentHead != null)
                                        {
                                            AssignedTo = UserDetail.segmentHead;
                                        }
                                        else
                                        {
                                            return("Error : Segment Head is not in LFG.");

                                            if (DealerDtl != null)
                                            {
                                                AssignedTo = context.SP_LFGDetailsBasedOnName(DealerDtl.Segment).FirstOrDefault().EMP_CODE;
                                            }
                                        }
                                        data.FutureStatus_Id = 7; //Pending Segment Head;
                                        data.Requested_Role  = 8;

                                        if (data.EmployeeCode.Equals(AssignedTo))
                                        {
                                            //auto approval code here.

                                            ApproverDAL.UpdateRequestStatus(false, Convert.ToInt32(data.Request_Id), data.EmployeeCode, AssignedTo, data.Active_Role, data.Requested_Role, data.CurrentStatus_Id, data.FutureStatus_Id, data.Remarks);

                                            data.Active_Role      = 8;
                                            data.Requested_Role   = 0;
                                            data.CurrentStatus_Id = 16;
                                            data.FutureStatus_Id  = 0;
                                        }
                                    }
                                    else
                                    {
                                        return("Error : Segment head is not defined in PMS.");
                                    }
                                }
                                else if (TotalSRV_Value <= FlowMatrixValue.VP && InvoiceAge <= FlowMatrixPeriod.VP)
                                {
                                    var DealerDtl = context.sp_GetDealerDtlBy_DealerRepositoryId(ReqHdr.DealerId).FirstOrDefault();
                                    //if (DealerDtl!=null)
                                    if (UserDetail.VPHead != "NA" && UserDetail.VPHead != "" && UserDetail.VPHead != null)
                                    {
                                        // AssignedTo = context.SP_LFGDetailsBasedOnName(DealerDtl.Segment).FirstOrDefault().VPHead;
                                        if (UserDetail.VPHead != "NA" && UserDetail.VPHead != "" && UserDetail.VPHead != null)
                                        {
                                            AssignedTo = UserDetail.VPHead;
                                        }
                                        else
                                        {
                                            return("Error : VP Head is not in LFG.");

                                            if (DealerDtl != null)
                                            {
                                                AssignedTo = context.SP_LFGDetailsBasedOnName(DealerDtl.Segment).FirstOrDefault().VPHead;
                                            }
                                        }
                                        data.FutureStatus_Id = 8; //Pending Sales Director / VP Head;
                                        data.Requested_Role  = 9;

                                        if (data.EmployeeCode.Equals(AssignedTo))
                                        {
                                            //auto approval code here.
                                            ApproverDAL.UpdateRequestStatus(false, Convert.ToInt32(data.Request_Id), data.EmployeeCode, AssignedTo, data.Active_Role, data.Requested_Role, data.CurrentStatus_Id, data.FutureStatus_Id, data.Remarks);

                                            data.Active_Role      = 9;
                                            data.Requested_Role   = 0;
                                            data.CurrentStatus_Id = 16;
                                            data.FutureStatus_Id  = 0;
                                        }
                                    }
                                    else
                                    {
                                        return("Error : Sales Director/VP Head is not Defined.");
                                    }
                                }
                                else
                                {
                                    var DealerDtl = context.sp_GetDealerDtlBy_DealerRepositoryId(ReqHdr.DealerId).FirstOrDefault();
                                    //if (DealerDtl!=null)
                                    if (UserDetail.President_Code != "NA" && UserDetail.President_Code != "" && UserDetail.President_Code != null)
                                    {
                                        // AssignedTo = context.SP_LFGDetailsBasedOnName(DealerDtl.Segment).FirstOrDefault().President_Code;
                                        if (UserDetail.President_Code != "NA" && UserDetail.President_Code != "" && UserDetail.President_Code != null)
                                        {
                                            AssignedTo = UserDetail.President_Code;
                                        }
                                        else
                                        {
                                            return("Error : President code is not in LFG.");

                                            if (DealerDtl != null)
                                            {
                                                AssignedTo = context.SP_LFGDetailsBasedOnName(DealerDtl.Segment).FirstOrDefault().President_Code;
                                            }
                                        }
                                        data.FutureStatus_Id = 9;//Pending President
                                        data.Requested_Role  = 6;

                                        if (data.EmployeeCode.Equals(AssignedTo))
                                        {
                                            //auto approval code here.
                                            ApproverDAL.UpdateRequestStatus(false, Convert.ToInt32(data.Request_Id), data.EmployeeCode, AssignedTo, data.Active_Role, data.Requested_Role, data.CurrentStatus_Id, data.FutureStatus_Id, data.Remarks);

                                            data.Active_Role      = 6;
                                            data.Requested_Role   = 0;
                                            data.CurrentStatus_Id = 16;
                                            data.FutureStatus_Id  = 0;
                                        }
                                    }
                                    else
                                    {
                                        return("Error : President code is not in LFG.");
                                    }
                                }
                            }
                        }
                    }
                    else if (approvalHeader.Status_Id == 10 || approvalHeader.Status_Id == 11)
                    {
                        if (UserDetail.President_Code.ToUpper().Trim() != "NA" && UserDetail.President_Code.Trim() != "" && UserDetail.President_Code != null)
                        {
                            AssignedTo = UserDetail.President_Code;//context.SP_LFGDetails(approvalHeader.CreatedBy).FirstOrDefault().President_Code;

                            if (data.EmployeeCode.Equals(AssignedTo))
                            {
                                //auto approval code here.
                                ApproverDAL.UpdateRequestStatus(false, Convert.ToInt32(data.Request_Id), data.EmployeeCode, AssignedTo, data.Active_Role, data.Requested_Role, data.CurrentStatus_Id, data.FutureStatus_Id, data.Remarks);

                                data.Active_Role      = 6;
                                data.Requested_Role   = 0;
                                data.CurrentStatus_Id = 16;
                                data.FutureStatus_Id  = 0;
                            }
                        }
                        else
                        {
                            return("Error : President code is not in LFG.");
                        }
                    }

                    ApproverDAL.UpdateRequestStatus(false, Convert.ToInt32(data.Request_Id), data.EmployeeCode, AssignedTo, data.Active_Role, data.Requested_Role, data.CurrentStatus_Id, data.FutureStatus_Id, data.Remarks);

                    SendMail(approvalHeader, data, RequestProcessType, AssignedTo);

                    Message = "Success : " + RequestHdr.RequestTypeOption + "-" + data.Request_Id + " Request has been Updated.";
                }
                else
                {
                    Message = "Error : Approval matrix is not Defined. Please contact admin.";
                }
                return(Message);
            }
        }