from flask import render_template, current_app
from email.mime.text import MIMEText
from email.utils import formatdate, make_msgid
from email import charset
from email.utils import formataddr
import smtplib

charset.add_charset('utf-8', charset.SHORTEST, charset.QP)

def format_message(user, subject, body):
    from_name = current_app.config['FROM_NAME']
    from_addr = current_app.config['FROM_ADDR']

    msg = MIMEText(body, 'plain', 'UTF-8')
    msg['Subject'] = subject
    msg['To'] = formataddr((user.mail_to_name, user.email))
    msg['From'] = formataddr((from_name, from_addr))
    msg['Date'] = formatdate()
    msg['Message-ID'] = make_msgid()

    return msg

def send_mail(user, subject, body):
    bounce_addr = current_app.config['FROM_ADDR']

    msg = format_message(user, subject, body)

    msg_as_string = msg.as_string()

    if not current_app.config['REALLY_SEND_MAIL']:  # during development
        return
    s = smtplib.SMTP('localhost')
    s.sendmail(bounce_addr, [user.email], msg_as_string)
    s.quit()

def send_signup_mail(user):
    ''' unused so far '''
    subject = u'xanadu: verify your account'
    body = render_template('mail/signup.txt', user=user)
    send_mail(user, subject, body)