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

from django.db.models import Q
from django.core.cache import cache
from django.conf import settings

from project.commons.utils import mail_exception

from .models import License
from . import consts


DEBUG = getattr(settings, 'DEBUG', False)

cache_duration = 3600


def license_check_soon_ends(request):
    try:
        license_cookie = request.COOKIES.get('close_message_license')
        license_15days = cache.get('license_15_%s' % (request.user.username,), None)
        days_left = cache.get('days_left_%s' % (request.user.username,), None)
        cur_license = cache.get('cur_license_%s' % (request.user.username,), None)

        now_ = datetime.today()

        if not days_left or not cur_license:
            current_licenses = (License.objects
                .filter(company=request.user.profile, date_from__lte=now_, date_to__gte=now_, deleted=False)
                .filter(Q(status__in = [consts.LICENSE_TEST_PERIOD, consts.LICENSE_ACTIVE]) | Q(order_status=consts.ORDER_PAID))
            )

            if current_licenses:
                cur_license = current_licenses[0]
                days_left = (cur_license.date_to - now_.date()).days
                cache.set('days_left_%s' % (request.user.username,), days_left, cache_duration)
                cache.set('cur_license_%s' % (request.user.username,), cur_license, cache_duration)

        if not license_cookie:
            if license_15days is None:
                licenses_ends = (License.objects
                    .filter(company=request.user.profile, date_to__lte = now_ + timedelta(days=consts.LICENSE_DAYS_BEFORE_EXPIRE), deleted=False)
                    .filter(Q(status__in = [consts.LICENSE_TEST_PERIOD, consts.LICENSE_ACTIVE]) | Q(order_status=consts.ORDER_PAID))
                )

                next_licenses = License.objects.filter(company=request.user.profile, order_status=consts.ORDER_PAID, deleted=False)

                if licenses_ends and not next_licenses:
                    days_to_end = licenses_ends[0].date_to
                    cache.set('license_15_%s' % (request.user.username,), days_to_end, cache_duration)
                    license_15days = days_to_end
                else:
                    license_15days = ''

        return {
            'license_15days': license_15days,
            'license_days': days_left,
            'cur_license': cur_license,
        }
    except Exception as e:
        if DEBUG:
            raise
        else:
            mail_exception(u'customer: license_check_soon_ends error', u'Profile id=%d.' % request.user.profile.pk, e)
        #
        return { }