/*
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 * and open the template in the editor.
 */

package controller;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import model.Chemical;

/**
 *
 * @author Dell
 */
public class ChemControl extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        String chemName = request.getParameter("Chemical");
        String labnm=request.getParameter("Lab Name");
        String hztp=request.getParameter("Hazard type");
        String no=request.getParameter("Serial No.");
        long sno=0;           
           List <String> error=new ArrayList<String>();
           
        try {
             
            sno=Long.parseLong(no);
                            
        }catch(Exception e){
            
            error.add("Eneter only numbers !!");
        }
        
        if(chemName.isEmpty())
        { error.add("Please enter a chemical name"); 
        }
        if(labnm.isEmpty()){
        error.add("Enter your lab name ");}
        if(hztp.isEmpty()){
        error.add("Please enter the hazard type");}
        
        Chemical c= new Chemical(chemName,labnm,hztp,sno);
        
        if(error.isEmpty()){
            
            request.setAttribute("chinfo", c);
            RequestDispatcher rd=request.getRequestDispatcher("success.do");
           if(rd!=null) 
            rd.forward(request, response);
            }
            
            
        if(!error.isEmpty())
        {   request.setAttribute("ers", error);
            RequestDispatcher rs=request.getRequestDispatcher("badInfo.do");
           if(rs!=null)
            rs.forward(request, response);
        }
    }
    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}