package org.akaza.openclinica.core;

import org.akaza.openclinica.exception.OpenClinicaSystemException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.mail.MailException;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;

import java.util.ArrayList;
import java.util.Date;
import java.util.StringTokenizer;

import javax.mail.MessagingException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class OpenClinicaMailSender {

    protected final Logger logger = LoggerFactory.getLogger(getClass().getName());
    JavaMailSenderImpl mailSender;

    public void sendEmail(String to, String subject, String body, Boolean htmlEmail) throws OpenClinicaSystemException {
        sendEmail(to, EmailEngine.getAdminEmail(), subject, body, htmlEmail);
    }

    public void sendEmail(String to, String from, String subject, String body, Boolean htmlEmail) throws OpenClinicaSystemException {
        try {

            MimeMessage mimeMessage = mailSender.createMimeMessage();
            MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, htmlEmail);
            helper.setFrom(from);
            helper.setTo(processMultipleImailAddresses(to.trim()));
            helper.setSubject(subject);
            helper.setText(body, true);

            mailSender.send(mimeMessage);
            logger.debug("Email sent successfully on {}", new Date());
        } catch (MailException me) {
            logger.debug("Email could not be sent on {} due to: {}", new Date(), me.toString());
            throw new OpenClinicaSystemException(me.getMessage());
        } catch (MessagingException e) {
            logger.debug("Email could not be sent on {} due to: {}", new Date(), e.toString());
            throw new OpenClinicaSystemException(e.getMessage());
        }
    }

    private InternetAddress[] processMultipleImailAddresses(String to) throws MessagingException {
        ArrayList<String> recipientsArray = new ArrayList<String>();
        StringTokenizer st = new StringTokenizer(to, ",");
        while (st.hasMoreTokens()) {
            recipientsArray.add(st.nextToken());
        }

        int sizeTo = recipientsArray.size();
        InternetAddress[] addressTo = new InternetAddress[sizeTo];
        for (int i = 0; i < sizeTo; i++) {
            addressTo[i] = new InternetAddress(recipientsArray.get(i).toString());
        }
        return addressTo;
    }

    public JavaMailSenderImpl getMailSender() {
        return mailSender;
    }

    public void setMailSender(JavaMailSenderImpl mailSender) {
        this.mailSender = mailSender;
    }

}