public InvoiceViewModel(int AppointmentId)
{
InvoiceDetails invoiceDetails = new InvoiceDetails();
Diagnosis = invoiceDetails.GetDiagnosis(AppointmentId);
Invoice = invoiceDetails.GetInvoiceDetails(AppointmentId);
if (Invoice == null)
{
invoiceDetails.GenerateInvoice(AppointmentId);
Invoice = invoiceDetails.GetInvoiceDetails(AppointmentId);
}
Medicines = invoiceDetails.GetMedicineListForInvoice(Diagnosis.Id);
Tests = invoiceDetails.GetTestListForInvoice(Diagnosis.Id);
this.DoctorFee = Invoice.TotalCost - (Medicines.Sum(t => t.Medicines.Cost * t.Quantity) + Tests.Sum(t => t.Tests.Cost));
Age = invoiceDetails.GetAge(Invoice.Appointment.Patient.DateOfBirth);
}