#!/usr/bin/env python

import argparse
import logging
import smtplib
import sys

logging.basicConfig(stream=sys.stdout, level=logging.INFO)
logger = logging.getLogger(__name__)

def parse_args():
    parser = argparse.ArgumentParser(
            description='mailtest!')

    parser.add_argument('-v', '--verbose', action='store_true')

    args = parser.parse_args()
    return args

if __name__ == '__main__':
    args = parse_args()

    if args.verbose:
        logger.level = logging.DEBUG

    logger.debug('debug enabled for {debug}'.format(debug=args.verbose))

    message_template = str()
    message_template += "From: Test <{mail_from}>\n"
    message_template += "To: <{recipient}>\n"
    message_template += "Subject: {subject}"
    message_template += '\n\n{message_body}'

    # EDIT THESE SETTINGS HERE
    #############################################################
    recipients = ['user1@example.com', 'user2@example.com']
    subject = 'A subject!'
    body = 'The message body'

    SMTP_HOST = 'smtp.example.com'
    SMTP_PORT = '587'
    SMTP_USER = 'username_possible_including_@example.com'
    SMTP_PASS = 'secret_password'
    #############################################################

    message = message_template.format(
            mail_from=SMTP_USER,
            recipient=','.join(recipients),
            subject=subject,
            message_body=body)

    logger.debug('using these mail details:')
    logger.debug(' * SMTP_HOST: {smtp_host}'.format(smtp_host = SMTP_HOST))
    logger.debug(' * SMTP_PORT: {smtp_port}'.format(smtp_port = SMTP_PORT))
    logger.debug(' * SMTP_USER: {smtp_user}'.format(smtp_user = SMTP_USER))
    logger.debug(' * SMTP_PASS: {smtp_pass}'.format(smtp_pass = SMTP_PASS))

    logger.debug('instantiating SMTP')
    smtpObj = smtplib.SMTP(SMTP_HOST, SMTP_PORT)
    logger.debug('starttls')
    smtpObj.starttls()
    logger.debug('authentication')
    smtpObj.login(SMTP_USER, SMTP_PASS)
    logger.info('sending mail to:')
    for r in recipients:
        logger.info('  * {r}'.format(r=r))
    smtpObj.sendmail(SMTP_USER, recipients, message)

    logger.info('exiting!')