import sys
import string
import random
import smtplib
from pathlib import Path
from mailbox import Maildir
from email.message import EmailMessage

import logging
log = logging.getLogger(__name__)


body_ok = """Hi,

Attached is a spreadsheet with the articles you marked up in the
catalog.

Enjoy,
ProCatalog Markup Bot
"""

body_missing = """Hi,

I couldn't find a pdf attached to your message.  I can't do much
without a marked up catalog pdf, so please include that when you try
again.

Thanks,
ProCatalog Markup Bot
"""


def reply(frm, subj, xls_path):
    msg = EmailMessage()
    msg.set_content(body_ok)

    with open(xls_path, 'rb') as fp:
        msg.add_attachment(fp.read(),
                           maintype='application',
                           subtype='vnd.openxmlformats-officedocument.spreadsheetml.sheet',
                           filename=Path(xls_path).name)

    send(frm, subj, msg)


def reply_missing(frm, subj):
    msg = EmailMessage()
    msg.set_content(body_missing)
    send(frm, subj, msg)


def send(frm, subj, msg):
    msg['From'] = 'Keen ProCatalog Markup Bot <support@procatalog.io>'
    msg['To'] = frm
    msg['Bcc'] = 'alx-markup@procatalog.io'
    msg['Subject'] = f'Re: {subj}'
    msg['Message-ID'] = msgid()

    maildir = Maildir('/tmp/markup_submit_mail')
    maildir.add(msg)

    log.info(f'sending email to "{frm}": {subj}')

    with smtplib.SMTP('mail.mk.int') as s:
        s.starttls()
        s.login('remotevm', '5gW311IOs')
        s.send_message(msg)


def msgid():
    rand = ''.join(random.choices(string.ascii_uppercase + string.ascii_lowercase + string.digits, k=16))
    return f'<{rand}@markup.procatalog.io>'