from rest_framework.routers import APIRootView

from circuits.models import Circuit
from dcim.models import Device, Rack, Site, Cable
from extras.api.views import CustomFieldModelViewSet
from ipam.models import IPAddress, Prefix, VLAN, VRF
from tenancy import filtersets
from tenancy.models import *
from utilities.utils import count_related
from virtualization.models import VirtualMachine, Cluster
from . import serializers


class TenancyRootView(APIRootView):
    """
    Tenancy API root view
    """
    def get_view_name(self):
        return 'Tenancy'


#
# Tenants
#

class TenantGroupViewSet(CustomFieldModelViewSet):
    queryset = TenantGroup.objects.add_related_count(
        TenantGroup.objects.all(),
        Tenant,
        'group',
        'tenant_count',
        cumulative=True
    ).prefetch_related('tags')
    serializer_class = serializers.TenantGroupSerializer
    filterset_class = filtersets.TenantGroupFilterSet


class TenantViewSet(CustomFieldModelViewSet):
    queryset = Tenant.objects.prefetch_related(
        'group', 'tags'
    ).annotate(
        circuit_count=count_related(Circuit, 'tenant'),
        device_count=count_related(Device, 'tenant'),
        ipaddress_count=count_related(IPAddress, 'tenant'),
        prefix_count=count_related(Prefix, 'tenant'),
        rack_count=count_related(Rack, 'tenant'),
        site_count=count_related(Site, 'tenant'),
        virtualmachine_count=count_related(VirtualMachine, 'tenant'),
        vlan_count=count_related(VLAN, 'tenant'),
        vrf_count=count_related(VRF, 'tenant'),
        cluster_count=count_related(Cluster, 'tenant')
    )
    serializer_class = serializers.TenantSerializer
    filterset_class = filtersets.TenantFilterSet


#
# Contacts
#

class ContactGroupViewSet(CustomFieldModelViewSet):
    queryset = ContactGroup.objects.add_related_count(
        ContactGroup.objects.all(),
        Contact,
        'group',
        'contact_count',
        cumulative=True
    ).prefetch_related('tags')
    serializer_class = serializers.ContactGroupSerializer
    filterset_class = filtersets.ContactGroupFilterSet


class ContactRoleViewSet(CustomFieldModelViewSet):
    queryset = ContactRole.objects.prefetch_related('tags')
    serializer_class = serializers.ContactRoleSerializer
    filterset_class = filtersets.ContactRoleFilterSet


class ContactViewSet(CustomFieldModelViewSet):
    queryset = Contact.objects.prefetch_related('group', 'tags')
    serializer_class = serializers.ContactSerializer
    filterset_class = filtersets.ContactFilterSet


class ContactAssignmentViewSet(CustomFieldModelViewSet):
    queryset = ContactAssignment.objects.prefetch_related('object', 'contact', 'role')
    serializer_class = serializers.ContactAssignmentSerializer
    filterset_class = filtersets.ContactAssignmentFilterSet
