# -*- coding: utf-8 -*-

import smtplib

import copy

from functools import partial

from ..validate import vInteger, vEmail,vBool

from ..model.status import Status

from ..config import Option

from .provider import Provider, providers

class SMTP(Provider):

    """A SMTP Provider to send emails.

    This Provider has only one typ ``"mail"`` and one route ``None``. 

    If :attr:`~iro.offer.provider.Provider.testmode` is **True** no mail will be send, only a connection is created to server.

    """

    def __init__(self, name):

        options = [

                ("host", Option(lambda x,y: x, long="Hostname of MTA", must=True)),

                ("port", Option(partial(vInteger,minv=0),long="Port of the MTA", default=25)),

                ("user", Option(lambda x,y: x, long="username to login into MTA.",default="")),

                ("password", Option(lambda x,y: x, long="password to login into MTA.",default="")),

                ("SSL", Option(vBool,long="use SSL for connection to MTA", default=False)),

                ("TLS", Option(vBool,long="use TLS for connection to MTA", default=False)),

                ("send_from", Option(vEmail,long="Emailaddress from which mail will be sended.",must=True)),

                ]

        Provider.__init__(self,name,{"mail":[None]},options)

    def send(self, recipient, mail):   

        """sends a mail to recipient

        :param string recipient: A valid email address.

        :param `iro.model.message.Mail` mail: Mail to send.

        :return: 

            - All went ok -- :class:`iro.model.status.Status` object

            - otherwise -- an exception

        """

        if not self.testmode:

            if self.SSL:

                smtp = smtplib.SMTP_SSL(self.host,self.port)

            else:

                smtp = smtplib.SMTP(self.host,self.port)

            if self.TLS:

                smtp.starttls()

            if not self.user == "":

                smtp.login(self.user,self.password)

        try:

            frm=self.send_from

            if mail.getFrom():

                frm = mail.getFrom()

            tmpmail=copy.deepcopy(mail)

            tmpmail.content['From'] = frm 

            tmpmail.content['To'] = recipient

            if not self.testmode:

                smtp.sendmail(frm,  recipient, tmpmail.as_string())

            return Status(self, None)

        finally:

            smtp.quit()

    def getSendFunc(self, typ, route):

        """returns :meth:`send` method, if typ and route is valid."""

        Provider.getSendFunc(self, typ, route)

        return self.send

providers["smtp"]=SMTP