from django.core.management.base import BaseCommand, CommandError
from django.contrib.auth.models import Group, Permission
from django.contrib.contenttypes.models import ContentType


class Command(BaseCommand):
    '''
    Creates initial skeleton for the webapp.
    This command MUST do nothing if already run.
    '''

    def handle(self, *args, **options):

        self.stdout.write("Creating sikadmin group")
        sikadmin_group, created = Group.objects.get_or_create(name="sikadmin")
        if not created:
            self.stdout.write('The group "sikadmin" already existed'
                              'and was not therefore created')

        self.stdout.write("Creating sikadmin permission")

        # TODO Use some sikadmin native model when such exists
        group_ctype = ContentType.objects.get_for_model(Group)
        sikadmin_permission, created = Permission.objects.get_or_create(
            codename='sikadmin',
            content_type=group_ctype,
            name='SIK Admin')

        if not created:
            self.stdout.write('The permission "sikadmin" already existed'
                              'and was not therefore created')

        self.stdout.write("Giving sikadmin group permission to sikadmin")
        if sikadmin_group.permissions.filter(id=sikadmin_permission.id).exists():
            self.stdout.write("Permission already existed. skipping...")
        else:
            sikadmin_group.permissions.add(sikadmin_permission)

        self.stdout.write("Initialization successful")