package cpa.app.vip;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;


public class FaxBackServlet extends HttpServlet {


   private String methodCode = new String();
   private String idMethod   = new String();
   private String idNumber   = new String();
   private String daysAgo    = new String();
   private String requestURL = new String();


      /***********************************************************************
          Call a method in the payment class to validate a taxpayer ID number.

          @return payment count if valid ID number or a negative if not valid
       ***********************************************************************/
   private String getTaxpayerIDNumber() 
   {

      Payment payment = new Payment();
      return payment.getTaxpayerIDNumber(idMethod, idNumber);

   }


      /***********************************************************************
          Call a method in the payment class to return the number of 
          payments for a given Taxpayer ID number and for a number of day
          from the current date.

          @return payment count
       ***********************************************************************/
   private String getPaymentCount() {

      Payment payment = new Payment();
      Integer paymentCount = new Integer(0);
      int intPaymentCount = 0;

      intPaymentCount = payment.getPaymentCount(idNumber, daysAgo);
      return paymentCount.toString(intPaymentCount);

   }


      /***********************************************************************
          Call a method in the payment class to retrive a vendor's name
          based on the vendor ID number.

          @return payment count if valid ID number or a negative if not valid
       ***********************************************************************/
   private String getVendorName() {

      Payment payment = new Payment();
      return payment.getVendorName(idNumber);

   }


      /***********************************************************************
          Call a method in the payment class to retrieve the URL for the
          Payment and Invoice Report.

          @return report URL
       ***********************************************************************/
   private String getPaymentAndInvoiceRptURL()
   {

      Payment payment = new Payment();
      return payment.getPaymentAndInvoiceRptURL(requestURL, idNumber, daysAgo);

   }


      /***********************************************************************
          Holds ServletConfig object passed by the servlet engine. 
       ***********************************************************************/
   public void init(ServletConfig config) throws ServletException
   {
     super.init(config);
   }


      /***********************************************************************
          Handles HTTP POST resquest.

          @param request  object used to provide the servlet information about
                          the request
          @param response oesponse that the servlet provides back to the 
                          client
       ***********************************************************************/
   public void doPost(HttpServletRequest request, HttpServletResponse response) 
                  throws ServletException, IOException {

     response.setContentType("text/html");
     PrintWriter out = new PrintWriter(response.getOutputStream());
     HttpUtils httpUtil = new HttpUtils();
     StringBuffer reqURL = new StringBuffer();

     reqURL = httpUtil.getRequestURL(request);
     this.requestURL = reqURL.toString();

     try { this.methodCode = request.getParameter("methodCode"); } 
           catch (Exception e) { e.printStackTrace(); }
     try { this.idMethod = request.getParameter("idMethod"); } 
           catch (Exception e) { e.printStackTrace(); }
     try { this.idNumber = request.getParameter("idNumber"); } 
           catch (Exception e) { e.printStackTrace(); }
     try { this.daysAgo = request.getParameter("daysAgo"); } 
           catch (Exception e) { e.printStackTrace(); }


     // method codes:
     // GTIN   - getTaxpayerIDNumber
     // GPC    - getPaymentCount
     // GVN    - getVendorName
     // GPIRU  - getPaymentAndInvoiceRptURL
     if (methodCode.equals("GTIN"))
     {
        out.println(getTaxpayerIDNumber());
     }
     else if(methodCode.equals("GPC"))
     {
        out.println(getPaymentCount());
     }
     else if(methodCode.equals("GVN"))
     {
        out.println(getVendorName());
     }
     else if(methodCode.equals("GPIRU"))
     {
        out.println(getPaymentAndInvoiceRptURL());
     }

     out.close();

   }


      /***********************************************************************
          Handles HTTP GET resquest.
       ***********************************************************************/
   public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
   {
      doPost(request, response);
   }


      /***********************************************************************
          Returns description of servlet.
       ***********************************************************************/
   public String getServletInfo()
   {
     return "Return values to the FaxBackApplet class";
   }

}