/*******************************************************************************
 * Copyright (c) 2000, 2006 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.releng;

/**
 * A Class that sends build related email messages.  host, sender, recipient and
 * build related information set in monitor.properties
 */

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;

import java.io.File;
import java.util.StringTokenizer;
import java.util.Properties;

public class Mailer {

	// flag that determines whether or not to send mail
	boolean sendMail = true;

	// the Object that holds the key value pairs in monitor.properties
	private BuildProperties buildProperties;

	//convert the comma separated list of email addressed into an array of Address objects
	private Address[] getAddresses(String recipientList) {
		int i = 0;
		StringTokenizer recipients = new StringTokenizer(recipientList, ",");
		Address[] addresses = new Address[recipients.countTokens()];

		while (recipients.hasMoreTokens()) {
			try {
				addresses[i++] = new InternetAddress(recipients.nextToken());
			} catch (AddressException e) {
				System.out.println("Unable to create address");
			}
		}
		return addresses;
	}

	public Mailer(){
		this("monitor.properties");
	}
	public Mailer(String buildPropertiesPath){
		buildProperties = new BuildProperties(buildPropertiesPath);
		if (buildProperties.getHost().equals("")||buildProperties.getSender().equals("")||buildProperties.getToRecipientList().equals("")){
			sendMail=false;
		}
	}


	public static void main(String args[]) {
		Mailer mailer=new Mailer(args[0]);
		mailer.sendTextMessage(args[1],args[2]);
	}
	
	public void sendMessage(String aSubject, String aMessage) {
		if (aSubject == null || aMessage == null || sendMail == false){
			printEmailFailureNotice(aSubject,aMessage);
		}

		// Get system properties
		Properties props = System.getProperties();

		// Setup mail server
		props.put("mail.smtp.host", buildProperties.getHost());

		// Get session
		Session session = Session.getDefaultInstance(props, null);

		// Define message
		MimeMessage message = new MimeMessage(session);

		try {
			
			// Set the from address
			message.setFrom(new InternetAddress(buildProperties.getSender()));

			// Set the to address
			message.addRecipients(Message.RecipientType.TO, getAddresses(buildProperties.getToRecipientList()));

			// Set the subject
			message.setSubject(buildProperties.getBuildSubjectPrefix()+
						"Build "
							+ buildProperties.getBuildid()
							+ " (Timestamp:  "
							+ buildProperties.getTimestamp()
							+ "):"
							+ aSubject);

			// Set the content
			message.setText(
				"Build "
					+ buildProperties.getBuildid()
					+ " (Timestamp: "
					+ buildProperties.getTimestamp()
					+ "):  "
					+ aMessage);

			// Send message
			Transport.send(message);

		} catch (AddressException e) {
			e.printStackTrace();
		} catch (MessagingException e) {
			e.printStackTrace();
		}
	}

	public void sendTextMessage(String aSubject, String aMessage) {
		if (aSubject == null || aMessage == null || sendMail == false){
			printEmailFailureNotice(aSubject,aMessage);
		}

		// Get system properties
		Properties props = System.getProperties();

		// Setup mail server
		props.put("mail.smtp.host", buildProperties.getHost());

		// Get session
		Session session = Session.getDefaultInstance(props, null);

		// Define message
		MimeMessage message = new MimeMessage(session);

		try {
			
			// Set the from address
			message.setFrom(new InternetAddress(buildProperties.getSender()));

			// Set the to address
			message.addRecipients(Message.RecipientType.BCC, getAddresses(buildProperties.getTextRecipientList()));

			// Set the subject
			message.setSubject(buildProperties.getBuildSubjectPrefix()+
						"Build "
							+ buildProperties.getBuildid()
							+ ":"
							+ aSubject);

			// Set the content
			message.setText(aMessage);

			// Send message
			Transport.send(message);

		} catch (AddressException e) {
			e.printStackTrace();
		} catch (MessagingException e) {
			e.printStackTrace();
		}
	}

	public void sendMultiPartMessage(
	// a method for sending mail with attachments
	String aSubject, String aMessage, String[] attachments) {
		if (aSubject == null || aMessage == null || sendMail == false){
			printEmailFailureNotice(aSubject,aMessage);
		}

		// Get system properties
		Properties props = System.getProperties();

		// Setup mail server
		props.put("mail.smtp.host", buildProperties.getHost());

		// Get session
		Session session = Session.getDefaultInstance(props, null);

		// Define message
		MimeMessage message = new MimeMessage(session);

		Multipart mp = new MimeMultipart();

		try {
			// Set the from address
			message.setFrom(new InternetAddress(buildProperties.getSender()));

			// Set the to address
			message.addRecipients(Message.RecipientType.TO, getAddresses(buildProperties.getToRecipientList()));

			// Set the subject
			message.setSubject(buildProperties.getBuildSubjectPrefix()+
			"Build "
				+ buildProperties.getBuildid()
				+ " (Timestamp:  "
				+ buildProperties.getTimestamp()
				+ "):"
				+ aSubject);

			// create and fill the first message part 
			MimeBodyPart part = new MimeBodyPart();
			part.setText(
				"Build "
					+ buildProperties.getBuildid()
					+ " (Timestamp: "
					+ buildProperties.getTimestamp()
					+ "):  "
					+ aMessage);
			mp.addBodyPart(part);

			//for each attachment create new message part
			for (int i = 0; i < attachments.length; i++) {
				MimeBodyPart attachmentPart = new MimeBodyPart();
				// attach the file to the message 
				FileDataSource attachment = new FileDataSource(attachments[i]);
				attachmentPart.setDataHandler(new DataHandler(attachment));
				File attachmentFile=new File(attachments[i]);							
				attachmentPart.setFileName(attachmentFile.getParent()+"-"+attachmentFile.getName());
				mp.addBodyPart(attachmentPart);
			}

			// add the Multipart to the message 
			message.setContent(mp);

			Transport.send(message);

		} catch (AddressException e) {
		} catch (MessagingException e) {
		}
	}

	private void printEmailFailureNotice(String aSubject, String aMessage){
		System.out.println("Email failed.  Settings:");
		System.out.println("\nhost="+buildProperties.getHost()+"\nsender="+buildProperties.getSender()+"\nrecipients="+buildProperties.getToRecipientList());
		System.out.println("\nSubject="+aSubject+"\nMessage="+aMessage);
		return;
	}

	/**
	 * Returns the buildProperties.
	 * @return BuildProperties
	 */
	public BuildProperties getBuildProperties() {
		return buildProperties;
	}

	/**
	 * Sets the buildProperties.
	 * @param buildProperties The buildProperties to set
	 */
	public void setBuildProperties(BuildProperties buildProperties) {
		this.buildProperties = buildProperties;
	}

}