package cs3220.controller;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/AddMVC")
public class AddMVC extends HttpServlet {

    private static final long serialVersionUID = 1L;

    public AddMVC()
    {
        super();
    }

    protected void doGet( HttpServletRequest request,
        HttpServletResponse response ) throws ServletException, IOException
    {
        request.getRequestDispatcher( "/WEB-INF/AddForm.jsp" ).forward( request,
            response );
    }

    protected void doPost( HttpServletRequest request,
        HttpServletResponse response ) throws ServletException, IOException
    {
        String a = request.getParameter( "a" );
        String b = request.getParameter( "b" );

        if( a == null || a.trim().length() == 0 || b == null
            || b.trim().length() == 0 )
        {
            response.sendRedirect( "AddMVC" );
            return;
        }

        int sum = Integer.parseInt( a ) + Integer.parseInt( b );

        request.setAttribute( "a", a );
        request.setAttribute( "b", b );
        request.setAttribute( "sum", sum );
        request.getRequestDispatcher( "/WEB-INF/AddResult.jsp" )
            .forward( request, response );
    }

}