import django_filters
from django.contrib.contenttypes.models import ContentType
from django.db.models import Q
from django.utils.translation import gettext as _

from dcim.filtersets import CabledObjectFilterSet
from dcim.models import Interface, Location, Region, Site, SiteGroup
from ipam.models import ASN
from netbox.filtersets import NetBoxModelFilterSet, OrganizationalModelFilterSet, PrimaryModelFilterSet
from tenancy.filtersets import ContactModelFilterSet, TenancyFilterSet
from utilities.filters import (
    ContentTypeFilter, MultiValueCharFilter, MultiValueNumberFilter, TreeNodeMultipleChoiceFilter,
)
from .choices import *
from .models import *

__all__ = (
    'CircuitFilterSet',
    'CircuitGroupAssignmentFilterSet',
    'CircuitGroupFilterSet',
    'CircuitTerminationFilterSet',
    'CircuitTypeFilterSet',
    'ProviderNetworkFilterSet',
    'ProviderAccountFilterSet',
    'ProviderFilterSet',
    'VirtualCircuitFilterSet',
    'VirtualCircuitTerminationFilterSet',
    'VirtualCircuitTypeFilterSet',
)


class ProviderFilterSet(PrimaryModelFilterSet, ContactModelFilterSet):
    region_id = TreeNodeMultipleChoiceFilter(
        queryset=Region.objects.all(),
        field_name='circuits__terminations___region',
        lookup_expr='in',
        label=_('Region (ID)'),
    )
    region = TreeNodeMultipleChoiceFilter(
        queryset=Region.objects.all(),
        field_name='circuits__terminations___region',
        lookup_expr='in',
        to_field_name='slug',
        label=_('Region (slug)'),
    )
    site_group_id = TreeNodeMultipleChoiceFilter(
        queryset=SiteGroup.objects.all(),
        field_name='circuits__terminations___site_group',
        lookup_expr='in',
        label=_('Site group (ID)'),
    )
    site_group = TreeNodeMultipleChoiceFilter(
        queryset=SiteGroup.objects.all(),
        field_name='circuits__terminations___site_group',
        lookup_expr='in',
        to_field_name='slug',
        label=_('Site group (slug)'),
    )
    site_id = django_filters.ModelMultipleChoiceFilter(
        field_name='circuits__terminations___site',
        queryset=Site.objects.all(),
        label=_('Site'),
    )
    site = django_filters.ModelMultipleChoiceFilter(
        field_name='circuits__terminations___site__slug',
        queryset=Site.objects.all(),
        to_field_name='slug',
        label=_('Site (slug)'),
    )
    asn_id = django_filters.ModelMultipleChoiceFilter(
        field_name='asns',
        queryset=ASN.objects.all(),
        label=_('ASN (ID)'),
    )
    asn = django_filters.ModelMultipleChoiceFilter(
        field_name='asns__asn',
        queryset=ASN.objects.all(),
        to_field_name='asn',
        label=_('ASN'),
    )

    class Meta:
        model = Provider
        fields = ('id', 'name', 'slug', 'description')

    def search(self, queryset, name, value):
        if not value.strip():
            return queryset
        return queryset.filter(
            Q(name__icontains=value) |
            Q(description__icontains=value) |
            Q(comments__icontains=value)
        )


class ProviderAccountFilterSet(PrimaryModelFilterSet, ContactModelFilterSet):
    provider_id = django_filters.ModelMultipleChoiceFilter(
        queryset=Provider.objects.all(),
        label=_('Provider (ID)'),
    )
    provider = django_filters.ModelMultipleChoiceFilter(
        field_name='provider__slug',
        queryset=Provider.objects.all(),
        to_field_name='slug',
        label=_('Provider (slug)'),
    )

    class Meta:
        model = ProviderAccount
        fields = ('id', 'name', 'account', 'description')

    def search(self, queryset, name, value):
        if not value.strip():
            return queryset
        return queryset.filter(
            Q(name__icontains=value) |
            Q(description__icontains=value) |
            Q(account__icontains=value) |
            Q(comments__icontains=value)
        ).distinct()


class ProviderNetworkFilterSet(PrimaryModelFilterSet):
    provider_id = django_filters.ModelMultipleChoiceFilter(
        queryset=Provider.objects.all(),
        label=_('Provider (ID)'),
    )
    provider = django_filters.ModelMultipleChoiceFilter(
        field_name='provider__slug',
        queryset=Provider.objects.all(),
        to_field_name='slug',
        label=_('Provider (slug)'),
    )

    class Meta:
        model = ProviderNetwork
        fields = ('id', 'name', 'service_id', 'description')

    def search(self, queryset, name, value):
        if not value.strip():
            return queryset
        return queryset.filter(
            Q(name__icontains=value) |
            Q(service_id__icontains=value) |
            Q(description__icontains=value) |
            Q(comments__icontains=value)
        ).distinct()


class CircuitTypeFilterSet(OrganizationalModelFilterSet):

    class Meta:
        model = CircuitType
        fields = ('id', 'name', 'slug', 'color', 'description')


class CircuitFilterSet(PrimaryModelFilterSet, TenancyFilterSet, ContactModelFilterSet):
    provider_id = django_filters.ModelMultipleChoiceFilter(
        queryset=Provider.objects.all(),
        label=_('Provider (ID)'),
    )
    provider = django_filters.ModelMultipleChoiceFilter(
        field_name='provider__slug',
        queryset=Provider.objects.all(),
        to_field_name='slug',
        label=_('Provider (slug)'),
    )
    provider_account_id = django_filters.ModelMultipleChoiceFilter(
        field_name='provider_account',
        queryset=ProviderAccount.objects.all(),
        label=_('Provider account (ID)'),
    )
    provider_account = django_filters.ModelMultipleChoiceFilter(
        field_name='provider_account__account',
        queryset=Provider.objects.all(),
        to_field_name='account',
        label=_('Provider account (account)'),
    )
    provider_network_id = django_filters.ModelMultipleChoiceFilter(
        field_name='terminations___provider_network',
        queryset=ProviderNetwork.objects.all(),
        label=_('Provider network (ID)'),
    )
    type_id = django_filters.ModelMultipleChoiceFilter(
        queryset=CircuitType.objects.all(),
        label=_('Circuit type (ID)'),
    )
    type = django_filters.ModelMultipleChoiceFilter(
        field_name='type__slug',
        queryset=CircuitType.objects.all(),
        to_field_name='slug',
        label=_('Circuit type (slug)'),
    )
    status = django_filters.MultipleChoiceFilter(
        choices=CircuitStatusChoices,
        null_value=None
    )
    region_id = TreeNodeMultipleChoiceFilter(
        queryset=Region.objects.all(),
        field_name='terminations___region',
        lookup_expr='in',
        label=_('Region (ID)'),
    )
    region = TreeNodeMultipleChoiceFilter(
        queryset=Region.objects.all(),
        field_name='terminations___region',
        lookup_expr='in',
        to_field_name='slug',
        label=_('Region (slug)'),
    )
    site_group_id = TreeNodeMultipleChoiceFilter(
        queryset=SiteGroup.objects.all(),
        field_name='terminations___site_group',
        lookup_expr='in',
        label=_('Site group (ID)'),
    )
    site_group = TreeNodeMultipleChoiceFilter(
        queryset=SiteGroup.objects.all(),
        field_name='terminations___site_group',
        lookup_expr='in',
        to_field_name='slug',
        label=_('Site group (slug)'),
    )
    site_id = django_filters.ModelMultipleChoiceFilter(
        field_name='terminations___site',
        queryset=Site.objects.all(),
        label=_('Site (ID)'),
    )
    site = django_filters.ModelMultipleChoiceFilter(
        field_name='terminations___site__slug',
        queryset=Site.objects.all(),
        to_field_name='slug',
        label=_('Site (slug)'),
    )
    location_id = django_filters.ModelMultipleChoiceFilter(
        field_name='terminations___location',
        label=_('Location (ID)'),
        queryset=Location.objects.all(),
    )
    termination_a_id = django_filters.ModelMultipleChoiceFilter(
        queryset=CircuitTermination.objects.all(),
        label=_('Termination A (ID)'),
    )
    termination_z_id = django_filters.ModelMultipleChoiceFilter(
        queryset=CircuitTermination.objects.all(),
        label=_('Termination A (ID)'),
    )

    class Meta:
        model = Circuit
        fields = (
            'id', 'cid', 'description', 'install_date', 'termination_date', 'commit_rate', 'distance', 'distance_unit',
        )

    def search(self, queryset, name, value):
        if not value.strip():
            return queryset
        return queryset.filter(
            Q(cid__icontains=value) |
            Q(terminations__xconnect_id__icontains=value) |
            Q(terminations__pp_info__icontains=value) |
            Q(terminations__description__icontains=value) |
            Q(description__icontains=value) |
            Q(comments__icontains=value)
        ).distinct()


class CircuitTerminationFilterSet(NetBoxModelFilterSet, CabledObjectFilterSet):
    q = django_filters.CharFilter(
        method='search',
        label=_('Search'),
    )
    circuit_id = django_filters.ModelMultipleChoiceFilter(
        queryset=Circuit.objects.all(),
        label=_('Circuit'),
    )
    termination_type = ContentTypeFilter()
    region_id = TreeNodeMultipleChoiceFilter(
        queryset=Region.objects.all(),
        field_name='_region',
        lookup_expr='in',
        label=_('Region (ID)'),
    )
    region = TreeNodeMultipleChoiceFilter(
        queryset=Region.objects.all(),
        field_name='_region',
        lookup_expr='in',
        to_field_name='slug',
        label=_('Region (slug)'),
    )
    site_group_id = TreeNodeMultipleChoiceFilter(
        queryset=SiteGroup.objects.all(),
        field_name='_site_group',
        lookup_expr='in',
        label=_('Site group (ID)'),
    )
    site_group = TreeNodeMultipleChoiceFilter(
        queryset=SiteGroup.objects.all(),
        field_name='_site_group',
        lookup_expr='in',
        to_field_name='slug',
        label=_('Site group (slug)'),
    )
    site_id = django_filters.ModelMultipleChoiceFilter(
        queryset=Site.objects.all(),
        field_name='_site',
        label=_('Site (ID)'),
    )
    site = django_filters.ModelMultipleChoiceFilter(
        field_name='_site__slug',
        queryset=Site.objects.all(),
        to_field_name='slug',
        label=_('Site (slug)'),
    )
    location_id = TreeNodeMultipleChoiceFilter(
        queryset=Location.objects.all(),
        field_name='_location',
        lookup_expr='in',
        label=_('Location (ID)'),
    )
    location = TreeNodeMultipleChoiceFilter(
        queryset=Location.objects.all(),
        field_name='_location',
        lookup_expr='in',
        to_field_name='slug',
        label=_('Location (slug)'),
    )
    provider_network_id = django_filters.ModelMultipleChoiceFilter(
        queryset=ProviderNetwork.objects.all(),
        field_name='_provider_network',
        label=_('ProviderNetwork (ID)'),
    )
    provider_id = django_filters.ModelMultipleChoiceFilter(
        field_name='circuit__provider_id',
        queryset=Provider.objects.all(),
        label=_('Provider (ID)'),
    )
    provider = django_filters.ModelMultipleChoiceFilter(
        field_name='circuit__provider__slug',
        queryset=Provider.objects.all(),
        to_field_name='slug',
        label=_('Provider (slug)'),
    )

    class Meta:
        model = CircuitTermination
        fields = (
            'id', 'termination_id', 'term_side', 'port_speed', 'upstream_speed', 'xconnect_id', 'description',
            'mark_connected', 'pp_info', 'cable_end', 'cable_position',
        )

    def search(self, queryset, name, value):
        if not value.strip():
            return queryset
        return queryset.filter(
            Q(circuit__cid__icontains=value) |
            Q(xconnect_id__icontains=value) |
            Q(pp_info__icontains=value) |
            Q(description__icontains=value)
        ).distinct()


class CircuitGroupFilterSet(OrganizationalModelFilterSet, TenancyFilterSet):

    class Meta:
        model = CircuitGroup
        fields = ('id', 'name', 'slug', 'description')


class CircuitGroupAssignmentFilterSet(NetBoxModelFilterSet):
    q = django_filters.CharFilter(
        method='search',
        label=_('Search'),
    )
    member_type = ContentTypeFilter()
    circuit = MultiValueCharFilter(
        method='filter_circuit',
        field_name='cid',
        label=_('Circuit (CID)'),
    )
    circuit_id = MultiValueNumberFilter(
        method='filter_circuit',
        field_name='pk',
        label=_('Circuit (ID)'),
    )
    virtual_circuit = MultiValueCharFilter(
        method='filter_virtual_circuit',
        field_name='cid',
        label=_('Virtual circuit (CID)'),
    )
    virtual_circuit_id = MultiValueNumberFilter(
        method='filter_virtual_circuit',
        field_name='pk',
        label=_('Virtual circuit (ID)'),
    )
    provider = MultiValueCharFilter(
        method='filter_provider',
        field_name='slug',
        label=_('Provider (name)'),
    )
    provider_id = MultiValueNumberFilter(
        method='filter_provider',
        field_name='pk',
        label=_('Provider (ID)'),
    )
    group_id = django_filters.ModelMultipleChoiceFilter(
        queryset=CircuitGroup.objects.all(),
        label=_('Circuit group (ID)'),
    )
    group = django_filters.ModelMultipleChoiceFilter(
        field_name='group__slug',
        queryset=CircuitGroup.objects.all(),
        to_field_name='slug',
        label=_('Circuit group (slug)'),
    )

    class Meta:
        model = CircuitGroupAssignment
        fields = ('id', 'member_id', 'priority')

    def search(self, queryset, name, value):
        if not value.strip():
            return queryset
        return queryset.filter(
            Q(member__cid__icontains=value) |
            Q(group__name__icontains=value)
        )

    def filter_circuit(self, queryset, name, value):
        circuits = Circuit.objects.filter(**{f'{name}__in': value})
        if not circuits.exists():
            return queryset.none()
        return queryset.filter(
            Q(
                member_type=ContentType.objects.get_for_model(Circuit),
                member_id__in=circuits
            )
        )

    def filter_virtual_circuit(self, queryset, name, value):
        virtual_circuits = VirtualCircuit.objects.filter(**{f'{name}__in': value})
        if not virtual_circuits.exists():
            return queryset.none()
        return queryset.filter(
            Q(
                member_type=ContentType.objects.get_for_model(VirtualCircuit),
                member_id__in=virtual_circuits
            )
        )

    def filter_provider(self, queryset, name, value):
        providers = Provider.objects.filter(**{f'{name}__in': value})
        if not providers.exists():
            return queryset.none()
        circuits = Circuit.objects.filter(provider__in=providers)
        virtual_circuits = VirtualCircuit.objects.filter(provider_network__provider__in=providers)
        return queryset.filter(
            Q(
                member_type=ContentType.objects.get_for_model(Circuit),
                member_id__in=circuits
            ) |
            Q(
                member_type=ContentType.objects.get_for_model(VirtualCircuit),
                member_id__in=virtual_circuits
            )
        )


class VirtualCircuitTypeFilterSet(OrganizationalModelFilterSet):

    class Meta:
        model = VirtualCircuitType
        fields = ('id', 'name', 'slug', 'color', 'description')


class VirtualCircuitFilterSet(PrimaryModelFilterSet, TenancyFilterSet):
    provider_id = django_filters.ModelMultipleChoiceFilter(
        field_name='provider_network__provider',
        queryset=Provider.objects.all(),
        label=_('Provider (ID)'),
    )
    provider = django_filters.ModelMultipleChoiceFilter(
        field_name='provider_network__provider__slug',
        queryset=Provider.objects.all(),
        to_field_name='slug',
        label=_('Provider (slug)'),
    )
    provider_account_id = django_filters.ModelMultipleChoiceFilter(
        field_name='provider_account',
        queryset=ProviderAccount.objects.all(),
        label=_('Provider account (ID)'),
    )
    provider_account = django_filters.ModelMultipleChoiceFilter(
        field_name='provider_account__account',
        queryset=Provider.objects.all(),
        to_field_name='account',
        label=_('Provider account (account)'),
    )
    provider_network_id = django_filters.ModelMultipleChoiceFilter(
        queryset=ProviderNetwork.objects.all(),
        label=_('Provider network (ID)'),
    )
    type_id = django_filters.ModelMultipleChoiceFilter(
        queryset=VirtualCircuitType.objects.all(),
        label=_('Virtual circuit type (ID)'),
    )
    type = django_filters.ModelMultipleChoiceFilter(
        field_name='type__slug',
        queryset=VirtualCircuitType.objects.all(),
        to_field_name='slug',
        label=_('Virtual circuit type (slug)'),
    )
    status = django_filters.MultipleChoiceFilter(
        choices=CircuitStatusChoices,
        null_value=None
    )

    class Meta:
        model = VirtualCircuit
        fields = ('id', 'cid', 'description')

    def search(self, queryset, name, value):
        if not value.strip():
            return queryset
        return queryset.filter(
            Q(cid__icontains=value) |
            Q(description__icontains=value) |
            Q(comments__icontains=value)
        ).distinct()


class VirtualCircuitTerminationFilterSet(NetBoxModelFilterSet):
    q = django_filters.CharFilter(
        method='search',
        label=_('Search'),
    )
    virtual_circuit_id = django_filters.ModelMultipleChoiceFilter(
        queryset=VirtualCircuit.objects.all(),
        label=_('Virtual circuit'),
    )
    role = django_filters.MultipleChoiceFilter(
        choices=VirtualCircuitTerminationRoleChoices,
        null_value=None
    )
    provider_id = django_filters.ModelMultipleChoiceFilter(
        field_name='virtual_circuit__provider_network__provider',
        queryset=Provider.objects.all(),
        label=_('Provider (ID)'),
    )
    provider = django_filters.ModelMultipleChoiceFilter(
        field_name='virtual_circuit__provider_network__provider__slug',
        queryset=Provider.objects.all(),
        to_field_name='slug',
        label=_('Provider (slug)'),
    )
    provider_account_id = django_filters.ModelMultipleChoiceFilter(
        field_name='virtual_circuit__provider_account',
        queryset=ProviderAccount.objects.all(),
        label=_('Provider account (ID)'),
    )
    provider_account = django_filters.ModelMultipleChoiceFilter(
        field_name='virtual_circuit__provider_account__account',
        queryset=ProviderAccount.objects.all(),
        to_field_name='account',
        label=_('Provider account (account)'),
    )
    provider_network_id = django_filters.ModelMultipleChoiceFilter(
        queryset=ProviderNetwork.objects.all(),
        field_name='virtual_circuit__provider_network',
        label=_('Provider network (ID)'),
    )
    interface_id = django_filters.ModelMultipleChoiceFilter(
        queryset=Interface.objects.all(),
        field_name='interface',
        label=_('Interface (ID)'),
    )

    class Meta:
        model = VirtualCircuitTermination
        fields = ('id', 'interface_id', 'description')

    def search(self, queryset, name, value):
        if not value.strip():
            return queryset
        return queryset.filter(
            Q(virtual_circuit__cid__icontains=value) |
            Q(description__icontains=value)
        ).distinct()