public string GetNextPaymentMessage(NextPaymentMessageModel nextPaymentMessageModel)

        {

            var dateMonthDay = string.Empty;

            if (this.DueDate.Equals(DateTime.MinValue))

            {

                // Hide due date time because it comes as null from service, treat as past due

                nextPaymentMessageModel.BalanceDueMsg = string.IsNullOrWhiteSpace(nextPaymentMessageModel.CheckYourBillMsg) ? nextPaymentMessageModel.BalanceDueMsg : nextPaymentMessageModel.CheckYourBillMsg;

            }

            else if (this.HasMultipleDueDates)

            {

                return string.IsNullOrWhiteSpace(nextPaymentMessageModel.CheckYourBillMsg) ? nextPaymentMessageModel.BalanceDueMsg : nextPaymentMessageModel.CheckYourBillMsg;

            }

            else

            {

                dateMonthDay = string.Format("{0} {1}", GetDueDateAdMonth(), GetDateDayNumber(this.DueDate));

            }

​

            if (this.Amount == 0)

            {

                // From PDF file

                // Notes: . For any state where there is a zero balance (FullAmountDue=0.00) do not display BillDueDate, instead show “No Balance due” statement.

                return nextPaymentMessageModel.NoBalanceMsg;

            }

​

            else if (this.isFinalAccount)

            {

                var paymentMessage = (this.Amount > 0) ? nextPaymentMessageModel.BalanceDueMsg.Replace(DaysKey, DueDays.ToString()).Replace(DateKey, dateMonthDay) : nextPaymentMessageModel.NegativeBalanceMsg;

                return paymentMessage;

            }

​

            if (IsOverdue)

            {

                return nextPaymentMessageModel.BalanceOverDueMsg.Replace(DaysKey, DueDays.ToString()).Replace(DateKey, dateMonthDay);

            }

            else

            {

                switch (this.PaymentState)

                {

                    case PaymentStateEnum.NoDueAmount: // State 1

                        return nextPaymentMessageModel.NoBalanceMsg;

​

                    case PaymentStateEnum.AmountDue: // State 2

                        return HasMultipleDueDates

                            ? nextPaymentMessageModel.BalanceDueMsg

                            : nextPaymentMessageModel.BalanceDueMsg.Replace(DaysKey, DueDays.ToString()).Replace(DateKey, dateMonthDay);

​

                    //case PaymentStateEnum.OverdueAmount: // State 3

                    //    return nextPaymentMessageModel.BalanceOverDueMsg.Replace(DaysKey, DueDays.ToString()).Replace(DateKey, dateMonthDay);

​

                    case PaymentStateEnum.DepositOwed: // State 4

                        return HasMultipleDueDates

                            ? nextPaymentMessageModel.BalanceDueMsg

                            : nextPaymentMessageModel.BalanceDueMsg.Replace(DaysKey, DueDays.ToString()).Replace(DateKey, dateMonthDay);

​

                    case PaymentStateEnum.AutoPayDpp: // State 5

                        // return autoPaybalance.Replace(DaysKey, DueDays.ToString()).Replace(DateKey, dateMonthDay);

                        return this.DueDate.Equals(DateTime.MinValue)

                            ? nextPaymentMessageModel.BalanceDueMsg

                            : nextPaymentMessageModel.AutoPayMsg

                                .Replace(DaysKey, DueDays.ToString()).Replace(DateKey, dateMonthDay)

                                .Replace(Amount1Key, this.ExplanationAmount1.ToString("N", new CultureInfo("en-US")));

​

                    case PaymentStateEnum.NewAccountNoBalanceNoHistory: // State 6

                        return this.DueDate.Equals(DateTime.MinValue)

                            ? nextPaymentMessageModel.BalanceDueMsg

                            : nextPaymentMessageModel.FirstBillMsg.Replace(DaysKey, DueDays.ToString()).Replace(DateKey, dateMonthDay);

​

                    case PaymentStateEnum.LppBudgetBilling: // State 7

                        return nextPaymentMessageModel.BalanceDueMsg.Replace(DaysKey, DueDays.ToString()).Replace(DateKey, dateMonthDay);

​

                    case PaymentStateEnum.PaymentAgreement: // State 8

                        return HasMultipleDueDates

                            ? nextPaymentMessageModel.BalanceDueMsg

                            : nextPaymentMessageModel.BalanceDueMsg.Replace(DaysKey, DueDays.ToString()).Replace(DateKey, dateMonthDay);

​

                    case PaymentStateEnum.EnrollPaymentExtension: // State 9

                        return this.DueDate.Equals(DateTime.MinValue)

                            ? nextPaymentMessageModel.BalanceDueMsg

                            : nextPaymentMessageModel.BalanceDueExtensionMsg.Replace(DaysKey, DueDays.ToString()).Replace(DateKey, dateMonthDay);

​

                    case PaymentStateEnum.NegativeBalance: // State 10

                        return this.DueDate.Equals(DateTime.MinValue)

                            ? nextPaymentMessageModel.BalanceDueMsg

                            : nextPaymentMessageModel.NegativeBalanceMsg.Replace(Amount1Key, this.ExplanationAmount1.ToString("N", new CultureInfo("en-US")));

​

                    case PaymentStateEnum.LppAutoPay: // State 11

                        return this.DueDate.Equals(DateTime.MinValue)

                            ? nextPaymentMessageModel.BalanceDueMsg

                            : nextPaymentMessageModel.AutoPayMsg.Replace(Amount1Key, ExplanationAmount2.ToString("N", new CultureInfo("en-US"))).Replace(DateKey, dateMonthDay);

​

                    case PaymentStateEnum.NewCustomerNoBillDue: // State 12

                        return nextPaymentMessageModel.NewCustomerMsg;

​

                    case PaymentStateEnum.PaymentAgreementAutoPay: // State 13

                        return this.DueDate.Equals(DateTime.MinValue)

                            ? nextPaymentMessageModel.BalanceDueMsg

                            : nextPaymentMessageModel.AutoPayMsg

                                .Replace(Amount1Key, this.ExplanationAmount1.ToString("N", new CultureInfo("en-US")))

                                .Replace(DaysKey, DueDays.ToString()).Replace(DateKey, dateMonthDay);

​

                    case PaymentStateEnum.PaymentAgreementAutoPayLpp: // State 14

                        return this.DueDate.Equals(DateTime.MinValue)

                            ? nextPaymentMessageModel.BalanceDueMsg

                            : nextPaymentMessageModel.AutoPayMsg

                                .Replace(Amount1Key, this.ExplanationAmount1.ToString("N", new CultureInfo("en-US")))

                                .Replace(DaysKey, DueDays.ToString()).Replace(DateKey, dateMonthDay);

​

                    case PaymentStateEnum.PaymentExtensionAutoPay: // State 15

                        return this.DueDate.Equals(DateTime.MinValue)

                            ? nextPaymentMessageModel.BalanceDueMsg

                            : nextPaymentMessageModel.AutoPayMsg

                                .Replace(Amount1Key, this.ExplanationAmount1.ToString("N", new CultureInfo("en-US")))

                                .Replace(DaysKey, DueDays.ToString()).Replace(DateKey, dateMonthDay);

​

                    case PaymentStateEnum.PaymentExtensionLpp: // State 16

                        return this.DueDate.Equals(DateTime.MinValue)

                            ? nextPaymentMessageModel.BalanceDueMsg

                            : nextPaymentMessageModel.BalanceDueMsg.Replace(DaysKey, DueDays.ToString()).Replace(DateKey, dateMonthDay);

​

                    case PaymentStateEnum.PaymentExtensionLppAutopay: // State 17

                        return this.DueDate.Equals(DateTime.MinValue)

                            ? nextPaymentMessageModel.BalanceDueMsg

                            : nextPaymentMessageModel.AutoPayMsg.Replace(DaysKey, DueDays.ToString()).Replace(DateKey, dateMonthDay);

                }

            }

            return string.Empty;

        }