from django.core.management import BaseCommand, CommandError
from django.db.models import Q

from api import settings
from desecapi.models import RRset, Domain, User
from desecapi.pdns_change_tracker import PDNSChangeTracker


class Command(BaseCommand):
    help = 'Sets/updates limits for users and domains.'

    def add_arguments(self, parser):
        parser.add_argument('kind',
                            help='Identifies which limit should be updated. Possible values: domains, ttl')
        parser.add_argument('id',
                            help='Identifies the entity to be updated. Users are identified by email address; '
                                 'domains by their name.')
        parser.add_argument('new_limit', help='New value for the limit.')

    def handle(self, *args, **options):
        if options['kind'] == 'domains':
            try:
                user = User.objects.get(email=options['id'])
            except User.DoesNotExist:
                raise CommandError(f'User with email address "{options["id"]}" could not be found.')
            user.limit_domains = options['new_limit']
            user.save()
            print(f'Updated {user.email}: set max number of domains to {user.limit_domains}.')
        elif options['kind'] == 'ttl':
            try:
                domain = Domain.objects.get(name=options['id'])
            except Domain.DoesNotExist:
                raise CommandError(f'Domain with name "{options["id"]}" could not be found.')
            domain.minimum_ttl = options['new_limit']
            domain.save()
            print(f'Updated {domain.name}: set minimum TTL to {domain.minimum_ttl}.')
        else:
            raise CommandError(f'Unknown limit "{options["kind"]}" specified.')