package com.elseforif.servlet;

import com.elseforif.URLs;
import com.elseforif.servlet.utility.constraint.ServletParameters;
import com.elseforif.servlet.utility.constraint.JVCServletParameterConstraints;
import com.elseforif.servlet.utility.ElseForIfHTMLWriter;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.Properties;
import javax.mail.Session;
import javax.mail.internet.MimeMessage;
import javax.mail.Message;
import javax.mail.internet.InternetAddress;
import javax.mail.Transport;

/**
 * This servlet responds to the email form on the Contact page.  It sends
 * an email and then redirects back to the Contact page with a confirmation
 * message.
 */
public class ContactEmail extends ElseForIfServlet
  {

  private static final String SMTP_HOST = "vancleve.com";
  private static final String RECIPIENT_EMAIL = "jason@vancleve.com";

  private Session     m_session = null;



  /**
   * Initialize this servlet for use.
   *
   * @param servletConfig an object containing this servlet's configuration
   */
  public void init(ServletConfig servletConfig) throws ServletException
    {
    super.init(servletConfig);
    m_parameterConstraints = new JVCServletParameterConstraints(
          ATTRIBUTE_CONTACT_EMAIL_PARAMETERS, true);
    m_parameterConstraints.addRequiredEmailParameter(P_SENDER, false);
    m_parameterConstraints.addRequiredStringParameter(P_CATEGORY, false);
    m_parameterConstraints.addRequiredStringParameter(P_BODY, false);
    }


  /**
   * Send an email message to Else For If, then redirect back to the Contact
   * page.
   *
   * @param request a servlet request
   * @param response the response for that request
   * @param session the user's session object
   */
  protected void doBoth(HttpServletRequest request, HttpServletResponse response,
        HttpSession session, ServletParameters in, ElseForIfHTMLWriter out) throws Exception
    {
    if (in.getHasErrors()) {
      redirect(response, URLs.CONTACT + "#emailForm");
      return;
    }
    if (m_session == null)
      {
      Properties props = new Properties();
      props.put("mail.smtp.host", SMTP_HOST);
      props.put("mail.smtp.localhost", SMTP_HOST);
      m_session = Session.getDefaultInstance(props);
      }
    MimeMessage message = new MimeMessage(m_session);
    message.setFrom(new InternetAddress(in.S(P_SENDER)));
    message.addRecipient(Message.RecipientType.TO, new InternetAddress(RECIPIENT_EMAIL));
    message.setSubject("Contact Form (category: " + in.S(P_CATEGORY) + ").");
    message.setText(in.S(P_BODY));
    Transport.send(message);
    redirect(response, URLs.CONTACT + "?" + P_CONFIRMED + "=true");
    }

  }