import smtplib
import logging
import email
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.header import Header
from flask import current_app

mail_config = current_app.config['mail']
logger = logging.getLogger('waitress')


def sendmail(to: str, subject: str, message: str):
    if not (mail_config['username'] and mail_config['password']):
        logger.error("smtp email account is not configured")
    mail = MIMEMultipart('alternative')
    mail['Subject'] = Header(subject).encode()
    mail['From'] = '%s <%s>' % (
        Header(mail_config['from']).encode(), mail_config['username'])
    mail['To'] = to
    mail['Message-id'] = email.utils.make_msgid()
    mail['Date'] = email.utils.formatdate()

    mail.attach(MIMEText(message, "plain"))
    try:
        smtp = smtplib.SMTP_SSL(mail_config['host'], int(mail_config['port']))
        smtp.login(mail_config['username'], mail_config['password'])
        smtp.sendmail(mail_config['username'], to, mail.as_string())
    except Exception as e:
        logger.error("sendmail error: %s", repr(e))
    smtp.quit()