package report;

import dao.MarkingProperties;
import dao.ResultDAO;
import javax.activation.FileDataSource;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import model.Student;
import org.simplejavamail.api.email.Email;
import org.simplejavamail.api.mailer.config.TransportStrategy;
import org.simplejavamail.email.EmailBuilder;
import org.simplejavamail.mailer.MailerBuilder;

/**
 *
 * @author Mark George <mark.george@otago.ac.nz>
 */
public class SendReport {

	private static String password = null;

	public void sendReport(Student student, String reportFileName) {

		String assessment = MarkingProperties.assessmentDescription();
		String file = MarkingProperties.attachmentEmailName();

		String mName = MarkingProperties.markerName();
		String mEmail = MarkingProperties.markerEmail();
  		String mCode = MarkingProperties.paperCode();

		String message
				  = "Hi " + student.getFirstName() + ".\n"
				  + "\n"
				  + "Here is our feedback from marking your " + mCode + " " + assessment + " submission.  The feedback is in the attached PDF document.\n"
				  + "\n"
				  + "Cheers,\n"
				  + mName;

		Email email = EmailBuilder.startingBlank()
				  .from(mName, mEmail)
				  .to(student.getEmail())
				  .cc("mark.george@otago.ac.nz")
				  .withSubject(mCode + " " + assessment + " Result")
				  .withPlainText(message)
				  .withAttachment(file, new FileDataSource(reportFileName))
				  .buildEmail();

		try {

			String userName = MarkingProperties.smtpUserName();

			if (password == null && userName != null) {
				String result = getPassword("Staff E-Mail Password");
				if (result != null) {
					password = result;
				} else {
					System.out.println("Cancelled");
					return;
				}
			}

            
            TransportStrategy transport = TransportStrategy.SMTP;
            
            if(MarkingProperties.isTls()) {
                transport = TransportStrategy.SMTP_TLS;
            }
            
			MailerBuilder
				.withSMTPServer(MarkingProperties.smtpHost(), MarkingProperties.smtpPort(), userName, password)
				.withTransportStrategy(transport)
				.buildMailer()
				.sendMail(email);
			
			
			new ResultDAO().mailSent(student);

		} catch (Exception ex) {
			JOptionPane.showMessageDialog(null, "Error sending email - password wrong?", "Mail Error", JOptionPane.ERROR_MESSAGE);
			password = null;
			ex.printStackTrace();
		}

	}

	public static String getPassword(String prompt) {
		JPasswordField txtPasswd = new JPasswordField();
		int resp = JOptionPane.showConfirmDialog(null, txtPasswd, prompt,
				  JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE);
		if (resp == JOptionPane.OK_OPTION) {
			return new String(txtPasswd.getPassword());
		}
		return null;
	}

}