# lingo - basket and payment system
# Copyright (C) 2015  Entr'ouvert
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import datetime
import logging

import django.apps
import eopayment
from django.db import transaction
from django.db.models.signals import post_migrate
from django.urls import reverse
from django.utils import timezone
from django.utils.translation import gettext_lazy as _


class AppConfig(django.apps.AppConfig):
    name = 'combo.apps.lingo'
    verbose_name = _('Payment')

    def ready(self):
        post_migrate.connect(self.post_migrate_handler, sender=self)

    def post_migrate_handler(self, **kwargs):
        from .models import PaymentBackend

        with transaction.atomic():
            for payment_backend in PaymentBackend.objects.all():
                service_options = payment_backend.service_options
                transaction_options = {}
                for parameter in payment_backend.eopayment.get_parameters(scope='transaction'):
                    name = parameter['name']
                    if name in service_options:
                        transaction_options[name] = service_options.pop(name)
                if not transaction_options:
                    continue
                payment_backend.save()
                for regie in payment_backend.regie_set.all():
                    # merge old values in new transactions options
                    regie.transaction_options = dict(transaction_options, **regie.transaction_options)
                    regie.save()

    def get_before_urls(self):
        from . import urls

        return urls.urlpatterns

    def get_extra_manager_actions(self):
        return [{'href': reverse('lingo-manager-homepage'), 'text': _('Online Payment')}]

    def hourly(self):
        self.update_transactions()
        self.notify_payments()

    def update_transactions(self):
        from .models import EXPIRED, Transaction

        logger = logging.getLogger(__name__)
        now = timezone.now()
        to_expire = Transaction.objects.filter(
            start_date__lt=now - datetime.timedelta(hours=1), end_date__isnull=True
        )
        for transaction in to_expire:
            logger.info('transaction %r is expired', transaction.order_id)
            transaction.status = EXPIRED
            transaction.save()

        to_retry = Transaction.objects.filter(
            status__in=(eopayment.PAID, eopayment.ACCEPTED),
            to_be_paid_remote_items__isnull=False,
            start_date__gt=now - datetime.timedelta(days=4),
        )
        for transaction in to_retry:
            transaction.retry_notify_remote_items_of_payments()

    def notify_payments(self):
        from combo.apps.lingo.models import BasketItem

        logger = logging.getLogger(__name__)
        now = timezone.now()
        for item in BasketItem.objects.filter(
            notification_date__isnull=True,
            cancellation_date__isnull=True,
            payment_date__lt=now - datetime.timedelta(minutes=5),
            payment_date__gt=now - datetime.timedelta(minutes=300),
        ):
            try:
                item.notify_payment()
            except Exception:
                logger.exception('error in async notification for basket item %s', item.id)