"""passbook PolicyBinding administration"""
from django.contrib.auth.mixins import LoginRequiredMixin
from django.contrib.auth.mixins import (
    PermissionRequiredMixin as DjangoPermissionRequiredMixin,
)
from django.contrib.messages.views import SuccessMessageMixin
from django.db.models import QuerySet
from django.urls import reverse_lazy
from django.utils.translation import gettext as _
from django.views.generic import ListView, UpdateView
from guardian.mixins import PermissionListMixin, PermissionRequiredMixin
from guardian.shortcuts import get_objects_for_user

from passbook.admin.views.utils import DeleteMessageView
from passbook.lib.views import CreateAssignPermView
from passbook.policies.forms import PolicyBindingForm
from passbook.policies.models import PolicyBinding


class PolicyBindingListView(LoginRequiredMixin, PermissionListMixin, ListView):
    """Show list of all policies"""

    model = PolicyBinding
    permission_required = "passbook_policies.view_policybinding"
    paginate_by = 10
    ordering = ["order", "target"]
    template_name = "administration/policy_binding/list.html"

    def get_queryset(self) -> QuerySet:
        # Since `select_subclasses` does not work with a foreign key, we have to do two queries here
        # First, get all pbm objects that have bindings attached
        objects = (
            get_objects_for_user(
                self.request.user, "passbook_policies.view_policybindingmodel"
            )
            .filter(policies__isnull=False)
            .select_subclasses()
            .select_related()
            .order_by("pk")
        )
        for pbm in objects:
            pbm.bindings = get_objects_for_user(
                self.request.user, self.permission_required
            ).filter(target__pk=pbm.pbm_uuid)
        return objects


class PolicyBindingCreateView(
    SuccessMessageMixin,
    LoginRequiredMixin,
    DjangoPermissionRequiredMixin,
    CreateAssignPermView,
):
    """Create new PolicyBinding"""

    model = PolicyBinding
    permission_required = "passbook_policies.add_policybinding"
    form_class = PolicyBindingForm

    template_name = "generic/create.html"
    success_url = reverse_lazy("passbook_admin:policies-bindings")
    success_message = _("Successfully created PolicyBinding")


class PolicyBindingUpdateView(
    SuccessMessageMixin, LoginRequiredMixin, PermissionRequiredMixin, UpdateView
):
    """Update policybinding"""

    model = PolicyBinding
    permission_required = "passbook_policies.change_policybinding"
    form_class = PolicyBindingForm

    template_name = "generic/update.html"
    success_url = reverse_lazy("passbook_admin:policies-bindings")
    success_message = _("Successfully updated PolicyBinding")


class PolicyBindingDeleteView(
    LoginRequiredMixin, PermissionRequiredMixin, DeleteMessageView
):
    """Delete policybinding"""

    model = PolicyBinding
    permission_required = "passbook_policies.delete_policybinding"

    template_name = "generic/delete.html"
    success_url = reverse_lazy("passbook_admin:policies-bindings")
    success_message = _("Successfully deleted PolicyBinding")