import json

from xmlrpc.client import ServerProxy as RPCClient
from django_auth_ldap.backend import LDAPBackend
from django.core.management.base import BaseCommand
from django.conf import settings
from xmltodict import parse

from opennebula.models import VM as VMModel


class Command(BaseCommand):
    help = 'Syncronize VM information from OpenNebula'

    def add_arguments(self, parser):
        pass

    def handle(self, *args, **options):
        with RPCClient(settings.OPENNEBULA_URL) as rpc_client:
            success, response, *_ = rpc_client.one.vmpool.infoextended(
                settings.OPENNEBULA_USER_PASS, -2, -1, -1, -1
            )
            if success:
                vms = json.loads(json.dumps(parse(response)))['VM_POOL']['VM']
                unknown_user = set()

                backend = LDAPBackend()

                for vm in vms:
                    vm_id = vm['ID']
                    vm_owner = vm['UNAME']

                    user = backend.populate_user(username=vm_owner)

                    if not user:
                        unknown_user.add(vm_owner)
                    else:
                        VMModel.objects.update_or_create(
                            vmid=vm_id,
                            defaults={'data': vm, 'owner': user}
                        )
                print('User not found in ldap:', unknown_user)
            else:
                print(response)