from dcim.choices import InterfaceModeChoices
from dcim.models import Device, DeviceRole, Platform, Site
from django.utils.translation import gettext as _
from ipam.models import VRF
from netbox.forms import NetBoxModelImportForm
from tenancy.models import Tenant
from utilities.forms import CSVChoiceField, CSVModelChoiceField, SlugField
from virtualization.choices import *
from virtualization.models import *

__all__ = (
    'ClusterImportForm',
    'ClusterGroupImportForm',
    'ClusterTypeImportForm',
    'VirtualMachineImportForm',
    'VMInterfaceImportForm',
)


class ClusterTypeImportForm(NetBoxModelImportForm):
    slug = SlugField()

    class Meta:
        model = ClusterType
        fields = ('name', 'slug', 'description', 'tags')


class ClusterGroupImportForm(NetBoxModelImportForm):
    slug = SlugField()

    class Meta:
        model = ClusterGroup
        fields = ('name', 'slug', 'description', 'tags')


class ClusterImportForm(NetBoxModelImportForm):
    type = CSVModelChoiceField(
        queryset=ClusterType.objects.all(),
        to_field_name='name',
        help_text=_('Type of cluster')
    )
    group = CSVModelChoiceField(
        queryset=ClusterGroup.objects.all(),
        to_field_name='name',
        required=False,
        help_text=_('Assigned cluster group')
    )
    status = CSVChoiceField(
        choices=ClusterStatusChoices,
        help_text=_('Operational status')
    )
    site = CSVModelChoiceField(
        queryset=Site.objects.all(),
        to_field_name='name',
        required=False,
        help_text=_('Assigned site')
    )
    tenant = CSVModelChoiceField(
        queryset=Tenant.objects.all(),
        to_field_name='name',
        required=False,
        help_text=_('Assigned tenant')
    )

    class Meta:
        model = Cluster
        fields = ('name', 'type', 'group', 'status', 'site', 'description', 'comments', 'tags')


class VirtualMachineImportForm(NetBoxModelImportForm):
    status = CSVChoiceField(
        choices=VirtualMachineStatusChoices,
        help_text=_('Operational status')
    )
    site = CSVModelChoiceField(
        queryset=Site.objects.all(),
        to_field_name='name',
        required=False,
        help_text=_('Assigned site')
    )
    cluster = CSVModelChoiceField(
        queryset=Cluster.objects.all(),
        to_field_name='name',
        required=False,
        help_text=_('Assigned cluster')
    )
    device = CSVModelChoiceField(
        queryset=Device.objects.all(),
        to_field_name='name',
        required=False,
        help_text=_('Assigned device within cluster')
    )
    role = CSVModelChoiceField(
        queryset=DeviceRole.objects.filter(
            vm_role=True
        ),
        required=False,
        to_field_name='name',
        help_text=_('Functional role')
    )
    tenant = CSVModelChoiceField(
        queryset=Tenant.objects.all(),
        required=False,
        to_field_name='name',
        help_text=_('Assigned tenant')
    )
    platform = CSVModelChoiceField(
        queryset=Platform.objects.all(),
        required=False,
        to_field_name='name',
        help_text=_('Assigned platform')
    )

    class Meta:
        model = VirtualMachine
        fields = (
            'name', 'status', 'role', 'site', 'cluster', 'device', 'tenant', 'platform', 'vcpus', 'memory', 'disk',
            'description', 'comments', 'tags',
        )


class VMInterfaceImportForm(NetBoxModelImportForm):
    virtual_machine = CSVModelChoiceField(
        queryset=VirtualMachine.objects.all(),
        to_field_name='name'
    )
    parent = CSVModelChoiceField(
        queryset=VMInterface.objects.all(),
        required=False,
        to_field_name='name',
        help_text=_('Parent interface')
    )
    bridge = CSVModelChoiceField(
        queryset=VMInterface.objects.all(),
        required=False,
        to_field_name='name',
        help_text=_('Bridged interface')
    )
    mode = CSVChoiceField(
        choices=InterfaceModeChoices,
        required=False,
        help_text=_('IEEE 802.1Q operational mode (for L2 interfaces)')
    )
    vrf = CSVModelChoiceField(
        queryset=VRF.objects.all(),
        required=False,
        to_field_name='rd',
        help_text=_('Assigned VRF')
    )

    class Meta:
        model = VMInterface
        fields = (
            'virtual_machine', 'name', 'parent', 'bridge', 'enabled', 'mac_address', 'mtu', 'description', 'mode',
            'vrf', 'tags'
        )

    def __init__(self, data=None, *args, **kwargs):
        super().__init__(data, *args, **kwargs)

        if data:
            # Limit interface choices for parent & bridge interfaces to the assigned VM
            if virtual_machine := data.get('virtual_machine'):
                params = {
                    f"virtual_machine__{self.fields['virtual_machine'].to_field_name}": virtual_machine
                }
                self.fields['parent'].queryset = self.fields['parent'].queryset.filter(**params)
                self.fields['bridge'].queryset = self.fields['bridge'].queryset.filter(**params)

    def clean_enabled(self):
        # Make sure enabled is True when it's not included in the uploaded data
        if 'enabled' not in self.data:
            return True
        else:
            return self.cleaned_data['enabled']