import logging

from django.conf import settings
from django.utils.translation import get_language
from django_countries.fields import Country

from . import analytics
from ..discount.models import Sale
from .utils import get_client_ip, get_country_by_ip, get_currency_for_country

logger = logging.getLogger(__name__)


class GoogleAnalytics(object):
    def process_request(self, request):
        client_id = analytics.get_client_id(request)
        path = request.path
        language = get_language()
        headers = request.META
        # FIXME: on production you might want to run this in background
        try:
            analytics.report_view(client_id, path=path, language=language,
                                  headers=headers)
        except Exception:
            logger.exception('Unable to update analytics')


class DiscountMiddleware(object):
    def process_request(self, request):
        discounts = Sale.objects.all()
        discounts = discounts.prefetch_related('products', 'categories')
        request.discounts = discounts


class CountryMiddleware(object):

    def process_request(self, request):
        client_ip = get_client_ip(request)
        if client_ip:
            request.country = get_country_by_ip(client_ip)
        if not request.country:
            request.country = Country(settings.DEFAULT_COUNTRY)


class CurrencyMiddleware(object):

    def process_request(self, request):
        if hasattr(request, 'country') and request.country is not None:
            request.currency = get_currency_for_country(request.country)
        else:
            request.currency = settings.DEFAULT_CURRENCY