import email
import smtplib
import imaplib
from email.MIMEText import MIMEText
from email.MIMEMultipart import MIMEMultipart


# Drop 'GMAIL_' prefix: mail provider may change.
GMAIL_SMTP = "smtp.gmail.com"
GMAIL_IMAP = "imap.gmail.com"

# These are all global vars. If they are really do need to be
# global, they all should be uppercased.
# Avoid globals at all costs. See for ex.: https://stackoverflow.com/questions/19158339/why-are-global-variables-evil
# Length >= 3
l = 'login@gmail.com'
# Mixed case
passwORD = 'qwerty'
subject = 'Subject'
recipients = ['vasya@email.com', 'petya@email.com']
message = 'Message'
header = None


# def send(...):
#send message
msg = MIMEMultipart()
# msg.update({
#     'From': ...,
#     ...: ...})
msg['From'] = l
msg['To'] = ', '.join(recipients)
msg['Subject'] = subject
msg.attach(MIMEText(message))

# More descriptive var name. I suggest `conn`. Define port as `SMTPS_PORT = 587`
ms = smtplib.SMTP(GMAIL_SMTP, 587)

# identify ourselves to smtp gmail client
ms.ehlo()
# secure our email with tls encryption
ms.starttls()
# re-identify ourselves as an encrypted connection
ms.ehlo()

ms.login(l, passwORD)
# ms.sendmail(
#     l,
#     ms,
#     msg.as_string())
# -- or --
# ms.sendmail(l, ms, msg.as_string)
ms.sendmail(l,
ms, msg.as_string())

ms.quit()
#send end


# def read(...):
# Naming is broken. This is not an email "reception". We (or, rather MTA) receive using SMTP.
# I believe "read" would sound closer to the point.
#recieve

# rename mail -> conn. Why: scope for "mail" is way too broad. Conn is much more precise.
mail = imaplib.IMAP4_SSL(GMAIL_IMAP)
mail.login(l, passwORD)
mail.list()
# All hardcoded strings must be either defined as "constants" or be passed as an argument.
mail.select("inbox")
# This is definitely needs to be passed as an argument.
criterion = '(HEADER Subject "%s")' % header if header else 'ALL'
result, data = mail.uid('search', None, criterion)
# Assertion errors are to dirty. Not ok for prod environment. `raise` is a preferrable way of signalling an error condition.
assert data[0], 'There are no letters with current header'
latest_email_uid = data[0].split()[-1]
# The last arg should be in func params.
result, data = mail.uid('fetch', latest_email_uid, '(RFC822)')
raw_email = data[0][1]
email_message = email.message_from_string(raw_email)
mail.logout()
#end recieve

# No print, no file was written, where does all the output goes to?