from dcim.models import Site, RackRole, Rack, RackGroup
from tenancy.models import Tenant
from extras.models import CustomField, CustomFieldValue
from dcim.constants import RACK_TYPE_CHOICES, RACK_WIDTH_CHOICES
from ruamel.yaml import YAML

with open('/opt/netbox/initializers/racks.yml', 'r') as stream:
  yaml = YAML(typ='safe')
  racks = yaml.load(stream)

  required_assocs = {
    'site': (Site, 'name')
  }

  optional_assocs = {
    'role': (RackRole, 'name'),
    'tenant': (Tenant, 'name'),
    'group': (RackGroup, 'name')
  }

  if racks is not None:
    for params in racks:
      custom_fields = params.pop('custom_fields', None)

      for assoc, details in required_assocs.items():
        model, field = details
        query = { field: params.pop(assoc) }

        params[assoc] = model.objects.get(**query)

      for assoc, details in optional_assocs.items():
        if assoc in params:
          model, field = details
          query = { field: params.pop(assoc) }

          params[assoc] = model.objects.get(**query)

      for rack_type in RACK_TYPE_CHOICES:
        if params['type'] in rack_type:
          params['type'] = rack_type[0]

      for rack_width in RACK_WIDTH_CHOICES:
        if params['width'] in rack_width:
          params['width'] = rack_width[0]

      rack, created = Rack.objects.get_or_create(**params)

      if created:
        if custom_fields is not None:
          for cf_name, cf_value in custom_fields.items():
            custom_field = CustomField.objects.get(name=cf_name)
            custom_field_value = CustomFieldValue.objects.create(
              field=custom_field,
              obj=rack,
              value=cf_value
            )

            rack.custom_field_values.add(custom_field_value)

        print("Created rack", rack.site, rack.name)