import logging

from django.core.management.base import BaseCommand
from uncloud_auth.models import User
from uncloud_pay.models import Order, Bill
from django.core.exceptions import ObjectDoesNotExist

from datetime import timedelta, date
from django.utils import timezone
from uncloud_pay.models import Bill

BILL_PAYMENT_DELAY=timedelta(days=10)

logger = logging.getLogger(__name__)

class Command(BaseCommand):
    help = 'Generate bills and charge customers if necessary.'

    def add_arguments(self, parser):
        pass

    # TODO: use logger.*
    def handle(self, *args, **options):
        # Iterate over all 'active' users.
        # TODO: filter out inactive users.
        users = User.objects.all()
        print("Processing {} users.".format(users.count()))

        for user in users:
            now = timezone.now()
            Bill.generate_for(
                    year=now.year,
                    month=now.month,
                    user=user,
                    allowed_delay=BILL_PAYMENT_DELAY)

        # We're done for this round :-)
        print("=> Done.")