/*
    * Copyright 2005-2008 The Kuali Foundation
    * 
    * 
    * Licensed under the Educational Community License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    * 
    * http://www.opensource.org/licenses/ecl2.php
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.kuali.rice.kew.mail.service.impl;
  
  import java.util.Properties;
  
  import org.apache.log4j.Logger;
  import org.kuali.rice.core.config.ConfigContext;
  import org.kuali.rice.kew.exception.WorkflowRuntimeException;
  import org.kuali.rice.kew.mail.EmailBody;
  import org.kuali.rice.kew.mail.EmailFrom;
  import org.kuali.rice.kew.mail.EmailSubject;
  import org.kuali.rice.kew.mail.EmailTo;
  import org.kuali.rice.kew.mail.Mailer;
  import org.kuali.rice.kew.mail.service.EmailService;
  import org.springframework.beans.factory.InitializingBean;
  
  
  
  import org.kuali.rice.kew.mail.service.impl.EmailBcList;
  import org.kuali.rice.kew.mail.service.impl.EmailCcList;
  import org.kuali.rice.kew.mail.service.impl.EmailToList;
  
  
  public class DefaultEmailService implements EmailService, InitializingBean {
      private static final Logger LOG = Logger.getLogger(DefaultEmailService.class);
  
  	public static final String USERNAME_PROPERTY = "mail.smtp.username";
  	public static final String PASSWORD_PROPERTY = "mail.smtp.password";
  	
  	protected Mailer mailer;
  	
  	/**
  	 * This method is called by Spring on initialization.  
  	 */
  	public void afterPropertiesSet() throws Exception {
  		if(getMailer() == null){
  			mailer = createMailer();
  		}
  	}
  
  	/**
  	 * Retrieves the Properties used to configure the Mailer.  The property names configured in the 
  	 * Workflow configuration should match those of Java Mail.
  	 * @return
  	 */
  	private Properties getConfigProperties() {
  		return ConfigContext.getCurrentContextConfig().getProperties();
  	}
  	
  	public void sendEmail(EmailFrom from, EmailTo to, EmailSubject subject, EmailBody body, boolean htmlMessage) {
          if (to.getToAddress() == null) {
              LOG.warn("No To address specified; refraining from sending mail");
              return;
          }
  		try {
  			getMailer().sendMessage(
                          from.getFromAddress(),
                          to.getToAddress(),
                          subject.getSubject(),
                          body.getBody(),
                          htmlMessage);
  		} catch (Exception e) {
  			throw new WorkflowRuntimeException(e);
  		}
  	}
  
  
  	public void sendEmail(EmailFrom from, EmailToList to, EmailSubject subject, EmailBody body, EmailCcList cc, EmailBcList bc, boolean htmlMessage) {
  		if(getMailer() == null){
  			try {
  				mailer = createMailer();
  			} catch (Exception e) {
  				LOG.error("Error initializing mailer for multi-recipient email.", e);
  			}
  		}
  		if (to.getToAddresses().isEmpty()) {
  			LOG.error("List of To addresses must contain at least one entry.");
  		} else {
  			try {
  				getMailer().sendMessage(
  						from.getFromAddress(), 
  						to.getToAddressesAsAddressArray(), 
  						subject.getSubject(), 
  						body.getBody(), 
 						(cc == null ? null : cc.getToAddressesAsAddressArray()), 
 						(bc == null ? null : bc.getToAddressesAsAddressArray()), 
 						htmlMessage);
 			} catch (Exception e) {
 				LOG.error("Error sending email to multiple recipients.", e);
 			}
 		}
 	}
 
 	/**
 	 * @return the mailer
 	 */
 	public Mailer getMailer() {
 		return mailer;
 	}
 
 	/**
 	 * @param mailer the mailer to set
 	 * 
 	 * Note: If you want to test locally and not have a smtp server, you can, via spring,
 	 * inject the MockMailer. That class just prints the email via Log.info
 	 */
 	public void setMailer(Mailer mailer) {
 		this.mailer = mailer;
 	}
 	
 	protected Mailer createMailer(){
 		Mailer cMailer = null;
 		String username = ConfigContext.getCurrentContextConfig().getProperty(USERNAME_PROPERTY);
 		String password = ConfigContext.getCurrentContextConfig().getProperty(PASSWORD_PROPERTY);
 		if (username != null && password != null) {
 			cMailer = new Mailer(getConfigProperties(), username, password);
 			LOG.info("Rice Mailer being used. Username and Pass were found");
 		} else {
 			cMailer = new Mailer(getConfigProperties());
 			LOG.info("Rice Mailer being used. Username and Pass were not found");
 		}
 		return cMailer;
 	}
 
 }