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

from __future__ import unicode_literals

import subprocess

from django.conf import settings
from django.db import models

from coin.members.models import Member


class MaillingList(models.Model):
    short_name = models.CharField(
        'identifiant technique', max_length=50,
        help_text=(
            "c'est l'identifiant qui servira à "
            "communiquer avec le système de mailling-list"
            "(typiquement, la partie avant le \"@\" dans l'adress )"
        )
    )
    email = models.EmailField("adresse mail d'envoi")
    verbose_name = models.CharField(
        'nom complet', max_length=130,
        help_text="Nom affiché dans l'interface membre"
    )
    description = models.TextField()
    subscribers = models.ManyToManyField(
        Member, related_name='subscribed_maillinglists',
        verbose_name='abonné·e·s')

    class Meta:
        verbose_name = 'liste mail'
        verbose_name_plural = 'listes mail'

    def __unicode__(self):
        return '{} ({})'.format(self.verbose_name, self.email)

    def as_text_listing(self):
        """ One subscriber email per line
        """
        return '\n'.join(
                self.subscribers.values_list('email', flat=True))

    def sync_to_list_server(self):
        if not settings.MAILLIST_SYNC_COMMAND:
            raise ValueError('You should define MAILLIST_SYNC_COMMAND'
                             ' setting to use maillist module')
        else:
            cmd = settings.MAILLIST_SYNC_COMMAND.format(
                email=self.email,
                short_name=self.short_name,
            )
            p = subprocess.Popen(
                cmd, shell=True,
                stdin=subprocess.PIPE, stderr=subprocess.PIPE)
            out_stdout, out_stderr = p.communicate(address_list)
            if p.returncode != 0:
                raise SystemError(
                    "Erreur à l'appel de la commande : \"{}\"".format(
                        out_stderr))