import json

import uncloud.secrets as secrets


from xmlrpc.client import ServerProxy as RPCClient

from django.core.management.base import BaseCommand
from django.contrib.auth import get_user_model
from xmltodict import parse
from ungleich_common.ldap.ldap_manager import LdapManager

from opennebula.models import VM as VMModel


def find_user_based_on_email(users, email):
    for user in users:
        if email in user.mail.values:
            return user


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

    def add_arguments(self, parser):
        pass

    def handle(self, *args, **options):
        ldap_server_uri = secrets.LDAP_SERVER_URI.split(',')[0]
        ldap_manager = LdapManager(
            server=ldap_server_uri,
            admin_dn=secrets.LDAP_ADMIN_DN,
            admin_password=secrets.LDAP_ADMIN_PASSWORD,
        )
        users = ldap_manager.get('')  # Get all users

        with RPCClient(secrets.OPENNEBULA_URL) as rpc_client:
            success, response, *_ = rpc_client.one.vmpool.infoextended(
                secrets.OPENNEBULA_USER_PASS, -2, -1, -1, -1
            )
            if success:
                vms = json.loads(json.dumps(parse(response)))['VM_POOL']['VM']
                unknown_user_with_email = set()

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

                    user = find_user_based_on_email(users, vm_owner_email)
                    if not user:
                        unknown_user_with_email.add(vm_owner_email)
                    else:
                        try:
                            user_in_db = get_user_model().objects.get(email=vm_owner_email)
                        except get_user_model().DoesNotExist:
                            user_in_db = get_user_model().objects.create_user(username=user.uid, email=vm_owner_email)

                        VMModel.objects.update_or_create(
                            defaults={'data': vm, 'owner': user_in_db}, vmid=vm_id
                        )
                print('User with email but not found in ldap:', unknown_user_with_email)
            else:
                print(response)
                print(secrets.OPENNEBULA_USER_PASS)