import smtplib
from datetime import datetime
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.header import Header
from geruecht.logger import getDebugLogger
from . import mailConfig

debug = getDebugLogger()

class EmailController():

    def __init__(self):
        debug.info("init email controller")
        self.smtpServer = mailConfig['URL']
        self.port = mailConfig['port']
        self.user = mailConfig['user']
        self.passwd = mailConfig['passwd']
        self.crypt = mailConfig['crypt']
        self.email = mailConfig['email']

        debug.debug("smtpServer is {{ {} }}, port is {{ {} }}, user is {{ {} }}, crypt is {{ {} }}, email is {{ {} }}".format(self.smtpServer, self.port, self.user, self.crypt, self.email))

    def __connect__(self):
        debug.info('connect to email server')
        if self.crypt == 'SSL':
            self.smtp = smtplib.SMTP_SSL(self.smtpServer, self.port)
            log = self.smtp.ehlo()
            debug.debug("ehlo is {{ {} }}".format(log))
        if self.crypt == 'STARTTLS':
            self.smtp = smtplib.SMTP(self.smtpServer, self.port)
            log = self.smtp.ehlo()
            debug.debug("ehlo is {{ {} }}".format(log))
            log = self.smtp.starttls()
            debug.debug("starttles is {{ {} }}".format(log))
        log = self.smtp.login(self.user, self.passwd)
        debug.debug("login is {{ {} }}".format(log))

    def jobTransact(self, user, jobtransact):
        debug.info("create email jobtransact {{ {} }}for user {{ {} }}".format(jobtransact, user))
        date = '{}.{}.{}'.format(jobtransact['on_date']['day'], jobtransact['on_date']['month'], jobtransact['on_date']['year'])
        from_user = '{} {}'.format(jobtransact['from_user']['firstname'], jobtransact['from_user']['lastname'])
        job_kind = jobtransact['job_kind']
        subject = 'Dienstanfrage am {}'.format(date)
        text = MIMEText(
            "Hallo {} {},\n"
            "{} fragt, ob du am {} den Dienst {} übernehmen willst.\nBeantworte die Anfrage im Userportal von Flaschengeist.".format(user.firstname, user.lastname, from_user, date, job_kind['name']), 'utf-8')
        debug.debug("subject is {{ {} }}, text is {{ {} }}".format(subject, text.as_string()))
        return (subject, text)

    def jobInvite(self, user, jobtransact):
        debug.info("create email jobtransact {{ {} }}for user {{ {} }}".format(jobtransact, user))
        date = '{}.{}.{}'.format(jobtransact['on_date']['day'], jobtransact['on_date']['month'], jobtransact['on_date']['year'])
        from_user = '{} {}'.format(jobtransact['from_user']['firstname'], jobtransact['from_user']['lastname'])
        subject = 'Diensteinladung am {}'.format(date)
        text = MIMEText(
            "Hallo {} {},\n"
            "{} fragt, ob du am {} mit Dienst haben willst.\nBeantworte die Anfrage im Userportal von Flaschengeist.".format(user.firstname, user.lastname, from_user, date), 'utf-8')
        debug.debug("subject is {{ {} }}, text is {{ {} }}".format(subject, text.as_string()))
        return (subject, text)

    def credit(self, user):
        debug.info("create email credit for user {{ {} }}".format(user))
        subject = Header('Gerücht, bezahle deine Schulden!', 'utf-8')
        sum = user.getGeruecht(datetime.now().year).getSchulden()
        if sum < 0:
            type = 'Schulden'
            add = 'Bezahle diese umgehend an den Finanzer.'
        else:
            type = 'Guthaben'
            add = ''
        text = MIMEText(
            "Hallo {} {},\nDu hast {} im Wert von {:.2f} €. {}\n\nDiese Nachricht wurde automatisch erstellt.".format(
                user.firstname, user.lastname, type, abs(sum) / 100, add), 'plain', 'utf-8')
        debug.debug("subject is {{ {} }}, text is {{ {} }}".format(subject, text.as_string()))
        return (subject, text)

    def sendMail(self, user, type='credit', jobtransact=None):
        debug.info("send email to user {{ {} }}".format(user))
        try:
            if user.mail == 'None' or not user.mail:
                debug.warning("user {{ {} }} has no email-address".format(user))
                raise Exception("no valid Email")
            msg = MIMEMultipart()
            msg['From'] = self.email
            msg['To'] = user.mail

            if type == 'credit':
                subject, text = self.credit(user)
            elif type == 'jobtransact':
                subject, text = self.jobTransact(user, jobtransact)
            elif type == 'jobinvite':
                subject, text = self.jobInvite(user, jobtransact)
            else:
                raise Exception("Fail to send Email. No type is set. user={}, type={} , jobtransact={}".format(user, type, jobtransact))

            msg['Subject'] = subject
            msg.attach(text)

            debug.debug("send email {{ {} }} to user {{ {} }}".format(msg.as_string(), user))
            self.__connect__()
            self.smtp.sendmail(self.email, user.mail, msg.as_string())
            return {'error': False, 'user': {'userId': user.uid, 'firstname': user.firstname, 'lastname': user.lastname}}
        except Exception:
            debug.warning("exception in send email", exc_info=True)
            return {'error': True, 'user': {'userId': user.uid, 'firstname': user.firstname, 'lastname': user.lastname}}