package org.kuali.ole.deliver.batch;
   
   import org.apache.commons.lang.StringUtils;
   import org.kuali.ole.deliver.loan.LoanProcessor;
   import org.kuali.rice.core.api.config.property.ConfigContext;
   import org.kuali.rice.core.mail.MailSenderFactoryBean;
   import org.springframework.beans.factory.config.AbstractFactoryBean;
   import org.springframework.mail.javamail.JavaMailSenderImpl;
   
  import javax.mail.Authenticator;
  import javax.mail.PasswordAuthentication;
  import javax.mail.Session;
  import java.util.Properties;
  
  /**
   * Created with IntelliJ IDEA.
   * User: maheswarang
   * Date: 4/23/13
   * Time: 6:49 PM
   * To change this template use File | Settings | File Templates.
   */
  public class OleMailSenderFactoryBean extends AbstractFactoryBean {
      protected final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(OleMailSenderFactoryBean.class);
      private static final String MAIL_PREFIX = "mail";
      private static final String USERNAME_PROPERTY = "mail.smtp.username";
      private static final String PASSWORD_PROPERTY = "mail.smtp.password";
      private static final String HOST_PROPERTY = "mail.smtp.host";
      private static final String PORT_PROPERTY = "mail.smtp.port";
      private static final String PROTOCOL_PROPERTY = "mail.transport.protocol";
      private Session mailSession;
      private String host;
      private String port;
      private String userName;
      private String password;
      private LoanProcessor loanProcessor = new LoanProcessor();
  
      public LoanProcessor getLoanProcessor() {
          return loanProcessor;
      }
  
      public void setLoanProcessor(LoanProcessor loanProcessor) {
          this.loanProcessor = loanProcessor;
      }
  
      public String getHost() {
          return host;
      }
  
      public void setHost(String host) {
          this.host = host;
      }
  
      public String getPort() {
          return port;
      }
  
      public void setPort(String port) {
          this.port = port;
      }
  
      public String getUserName() {
          return userName;
      }
  
      public void setUserName(String userName) {
          this.userName = userName;
      }
  
      public String getPassword() {
          return password;
      }
  
      public void setPassword(String password) {
          this.password = password;
      }
  
      @Override
      protected  Object createInstance() throws Exception {
          // Retrieve "mail.*" properties from the configuration system and construct a Properties object
          Properties properties = new Properties();
          Properties configProps = ConfigContext.getCurrentContextConfig().getProperties();
          LOG.debug("createInstance(): collecting mail properties.");
          for (Object keyObj : configProps.keySet()) {
              if (keyObj instanceof String) {
                  String key = (String)keyObj;
                  if (key.startsWith(MAIL_PREFIX)){
                      properties.put(key, configProps.get(key));
                  }
              }
          }
  
          // Construct an appropriate Java Mail Session
          // If username and password properties are found, construct a Session with SMTP authentication
  
  
          if(host==null || (host!=null && host.trim().isEmpty())){
             host =properties.getProperty(HOST_PROPERTY);
          }
          if(port==null || (port!=null && port.trim().isEmpty())){
             port =properties.getProperty(PORT_PROPERTY);
         }
         if((userName==null || (userName!=null && userName.trim().isEmpty())) || ((password==null || (password!=null && password.trim().isEmpty())))){
             userName =properties.getProperty(USERNAME_PROPERTY);
             password =properties.getProperty(PASSWORD_PROPERTY);
         }
 
 
 
        /* String username = properties.getProperty(USERNAME_PROPERTY);
         String password = properties.getProperty(PASSWORD_PROPERTY);*/
         if (userName != null && password != null) {
             mailSession = Session.getInstance(properties, new SimpleAuthenticator(userName, password));
             LOG.info("createInstance(): Initializing mail session using SMTP authentication.");
         } else {
             mailSession = Session.getInstance(properties);
             LOG.info("createInstance(): Initializing mail session. No SMTP authentication.");
         }
 
         // Construct and return a Spring Java Mail Sender
         JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
         LOG.debug("createInstance(): setting SMTP host.");
         mailSender.setHost(host);
         if (port != null) {
             LOG.debug("createInstance(): setting SMTP port.");
             int smtpPort = Integer.parseInt(port.trim());
             mailSender.setPort(smtpPort);
         }
         String protocol = properties.getProperty(PROTOCOL_PROPERTY);
         if (StringUtils.isNotBlank(protocol)) {
             LOG.debug("createInstance(): setting mail transport protocol = " + protocol);
             mailSender.setProtocol(protocol);
         }
         mailSender.setSession(mailSession);
 
         LOG.info("createInstance(): Mail Sender Factory Bean initialized.");
         return mailSender;
     }
 
     private class SimpleAuthenticator extends Authenticator {
 
         private final PasswordAuthentication passwordAuthentication;
 
         private SimpleAuthenticator(String username, String password) {
             this.passwordAuthentication = new PasswordAuthentication(username, password);
         }
 
         public PasswordAuthentication getPasswordAuthentication() {
             return passwordAuthentication;
         }
     }
     @SuppressWarnings("unchecked")
     @Override
     public Class getObjectType() {
         return JavaMailSenderImpl.class;
     }
 
 
 }