# -*- coding: utf-8 -*-
from __future__ import absolute_import
from datetime import datetime, timedelta

from django.conf import settings
from django.template.loader import render_to_string
from django.core.mail import EmailMessage

from celery import shared_task
from .models import License, UserProfile


SUPPORT_EMAIL = getattr(settings, 'SUPPORT_EMAIL', '')


@shared_task
def check_license():
    profiles = UserProfile.objects.all()
    now = datetime.now()

    licenses = License.objects.filter(date_to__lt=now, status__in=[-1, 2], deleted=False)
    licenses.update(status=3)

    licenses = License.objects.filter(order_date__lt=now - timedelta(10), status=0, deleted=False)
    licenses.update(status=4)

    for profile in profiles:
        licenses = License.objects.filter(user=profile.user, date_from__lte=now, date_to__gte=now, status__in=[-1, 1, 2], deleted=False)
        if licenses:
            profile.active = True
        else:
            profile.active = False
        profile.save()
        licenses.filter(status=1).update(status=2)

        licenses = License.objects.filter(user=profile.user, date_to=now + timedelta(1), status__in=[-1, 2], deleted=False)
        licenses_remain = License.objects.filter(user=profile.user, date_from__gt=now + timedelta(1), status=1, deleted=False)
        licenses_to_pay = License.objects.filter(user=profile.user, status=0, deleted=False)

        if licenses and not licenses_remain:
            template_name = 'myauth/license_ends.txt'
            subject = u'Документор: окончание срока действия лицензии'
            dict_context = {'user_email': licenses[0].user, 
                            'support_email': SUPPORT_EMAIL, 
                            'license_ends': licenses[0].date_to,
                            'licenses_to_pay': licenses_to_pay,
                            }
            email_body = render_to_string(template_name, dict_context)
            email = EmailMessage(subject=subject, to=(licenses[0].user.email,), body=email_body)
            return email.send()

    return None