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 import getLogger

LOGGER = getLogger('E-MailController')

class EmailController():

    def __init__(self, smtpServer, user, passwd, crypt, port=587, email=""):
        self.smtpServer = smtpServer
        self.port = port
        self.user = user
        self.passwd = passwd
        self.crypt = crypt
        if email:
            self.email = email
        else:
            self.email = user
        LOGGER.debug('Init EmailController with smtpServer={}, port={}, user={}, crypt={}, email={}'.format(smtpServer, port, user, crypt, self.email))

    def __connect__(self):
        LOGGER.info('Connect to E-Mail-Server')
        if self.crypt == 'SSL':
            self.smtp = smtplib.SMTP_SSL(self.smtpServer, self.port)
            log = self.smtp.ehlo()
            LOGGER.debug(log)
        if self.crypt == 'STARTTLS':
            self.smtp = smtplib.SMTP(self.smtpServer, self.port)
            log = self.smtp.ehlo()
            LOGGER.debug(log)
            log = self.smtp.starttls()
            LOGGER.debug(log)
        log = self.smtp.login(self.user, self.passwd)
        LOGGER.debug(log)

    def jobTransact(self, user, jobtransact):
        date = '{}.{}.{}'.format(jobtransact['date'].day, jobtransact['date'].month, jobtransact['date'].year)
        from_user = '{} {}'.format(jobtransact['from_user'].firstname, jobtransact['from_user'].lastname)
        subject = 'Bardienstanfrage am {}'.format(date)
        text = MIMEText(
            "Hallo {} {},\n"
            "{} fragt, ob du am {} zum Bardienst teilnehmen willst. Beantworte die Anfrage im Userportal von Flaschengeist.".format(user.firstname, user.lastname, from_user, date), 'utf-8')
        return (subject, text)

    def credit(self, 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')
        return (subject, text)

    def sendMail(self, user, type='credit', jobtransact=None):
        try:
            if user.mail == 'None' or not user.mail:
                LOGGER.debug("cant send email to {}. Has no email-address. {}".format(user.uid, {'error': True, 'user': {'userId': user.uid, 'firstname': user.firstname, 'lastname': user.lastname}}))
                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)
            else:
                raise Exception("Fail to send Email. No type is set. user={}, type={} , jobtransact={}".format(user, type, jobtransact))

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

            LOGGER.debug("Send email to {}: '{}'".format(user.uid, msg.as_string()))
            self.__connect__()
            self.smtp.sendmail(self.email, user.mail, msg.as_string())
            LOGGER.debug("Sended email to {}. {}".format(user.uid, {'error': False, 'user': {'userId': user.uid, 'firstname': user.firstname, 'lastname': user.lastname}}))
            return {'error': False, 'user': {'userId': user.uid, 'firstname': user.firstname, 'lastname': user.lastname}}
        except Exception:
            return {'error': True, 'user': {'userId': user.uid, 'firstname': user.firstname, 'lastname': user.lastname}}