import json

from django.core.management.base import BaseCommand
from django.contrib.auth import get_user_model

from uncloud_vm.models import VMProduct, VMHost

class Command(BaseCommand):
    help = 'Check health of VMs and VMHosts'

    def add_arguments(self, parser):
        pass

    def handle(self, *args, **options):
        pending_vms = VMProduct.objects.filter(vmhost__isnull=True)
        vmhosts = VMHost.objects.filter(status='active')

        # 1. Check that all active hosts reported back N seconds ago
        # 2. Check that no VM is running on a dead host
        # 3. Migrate VMs if necessary
        # 4. Check that no VMs have been pending for longer than Y seconds

        # If VM snapshots exist without a VM -> notify user (?)


        print("Nothing is good, you should implement me")