package at.stadtverwaltung.server;

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

import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

import at.stadtverwaltung.client.Text;
import at.stadtverwaltung.client.presenter.rpc.EmailService;

import com.extjs.gxt.ui.client.widget.MessageBox;

public class EmailServiceImpl extends DatabaseServiceImpl implements EmailService {

	private static final long serialVersionUID = 1L;

	@Override
	public boolean sendMail(String from, String[] to, String[] cc, String[] bcc, String subject, String text) {
		// TODO Auto-generated method stub
		return false;
	}

	private static void sendMailByJavaMail(String smtpHost, String from, String[] to, String[] cc, String[] bcc, String subject, String text, File[] attachments) {

		/**
		 * Set up the mail
		 */

		int nrOfAttachments = attachments.length;

		String smtpUser = "";
		String smtpPW = "";
		boolean useSmtpAuthentication = false;

		try {
			// Get system properties and session
			Properties props = System.getProperties();
			Session session = Session.getInstance(props);

			// Define message and it's parts
			MimeMessage message = new MimeMessage(session);
			MimeBodyPart textPart = new MimeBodyPart();
			MimeBodyPart[] attachmentPart = new MimeBodyPart[nrOfAttachments];
			for (int i = 0; i < nrOfAttachments; i++)
				attachmentPart[i] = new MimeBodyPart();

			// Build multipart message
			Multipart multipart = new MimeMultipart();
			multipart.addBodyPart(textPart);
			for (int i = 0; i < nrOfAttachments; i++)
				multipart.addBodyPart(attachmentPart[i]);
			message.setContent(multipart);

			/**
			 * Fill the message properties
			 */

			// Set the SMTP Host
			props.put("mail.smtp.host", smtpHost);

			// We want to close the connection immediately after sending
			props.put("mail.smtp.quitwait", "false");

			// We want to use encryption if needed
			props.put("mail.smtp.starttls.enable", "true");
			props.put("mail.smtp.ssl.protocols", "SSLv3 TLSv1");

			// If authentication is needed we set it to true
			if (useSmtpAuthentication) props.put("mail.smtp.auth", "true");
			else props.put("mail.smtp.auth", "false");

			// Set all recipients of any kind (TO, CC, BCC)
			message.setFrom(new InternetAddress(from));
			for (int i = 0; i < to.length; i++) {
				message.addRecipient(Message.RecipientType.TO, new InternetAddress(to[i]));
			}
			for (int i = 0; i < cc.length; i++) {
				message.addRecipient(Message.RecipientType.CC, new InternetAddress(cc[i]));
			}
			for (int i = 0; i < bcc.length; i++) {
				message.addRecipient(Message.RecipientType.BCC, new InternetAddress(bcc[i]));
			}

			// Set subject, text and attachment
			message.setSubject(subject);
			textPart.setText(text);

			for (int i = 0; i < nrOfAttachments; i++) {
				attachmentPart[i++].attachFile(attachments[i]);
			}

			/**
			 * Send message (if no authentication is used, we use the short variant to send a mail
			 */

			if (useSmtpAuthentication) {
				Transport transport = session.getTransport("smtp");
				try {
					transport.connect(smtpHost, smtpUser, smtpPW);
					transport.sendMessage(message, message.getAllRecipients());
				}
				finally {
					transport.close();
				}
			}
			else { // No SMTP Authentication
				Transport.send(message);
			}

		}

		catch (Exception e) {
			e.printStackTrace();
			if (e instanceof MessagingException) { // SMTP Error
				MessageBox.alert(Text.ERROR, Text.ERROR_MAIL, null);
				e.printStackTrace();
			}
			else { // Other Error
				MessageBox.alert(Text.ERROR, Text.ERROR_MAIL, null);
				e.printStackTrace();
			}
		}
	}

}