"""passbook PolicyBinding administration"""
from django.contrib import messages
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.urls import reverse_lazy
from django.utils.translation import ugettext as _
from django.views.generic import DeleteView, ListView, UpdateView
from guardian.mixins import PermissionListMixin, PermissionRequiredMixin

from passbook.lib.utils.reflection import path_to_class
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"
    template_name = "administration/policybinding/list.html"


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")
    success_message = _("Successfully created PolicyBinding")

    def get_context_data(self, **kwargs):
        kwargs = super().get_context_data(**kwargs)
        form_cls = self.get_form_class()
        if hasattr(form_cls, "template_name"):
            kwargs["base_template"] = form_cls.template_name
        return kwargs


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")
    success_message = _("Successfully updated PolicyBinding")

    def get_context_data(self, **kwargs):
        kwargs = super().get_context_data(**kwargs)
        form_cls = self.get_form_class()
        if hasattr(form_cls, "template_name"):
            kwargs["base_template"] = form_cls.template_name
        return kwargs

    def get_form_class(self):
        form_class_path = self.get_object().form
        form_class = path_to_class(form_class_path)
        return form_class

    def get_object(self, queryset=None):
        return (
            PolicyBinding.objects.filter(pk=self.kwargs.get("pk"))
            .select_subclasses()
            .first()
        )


class PolicyBindingDeleteView(
    SuccessMessageMixin, LoginRequiredMixin, PermissionRequiredMixin, DeleteView
):
    """Delete policybinding"""

    model = PolicyBinding
    permission_required = "passbook_policies.delete_policybinding"

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

    def delete(self, request, *args, **kwargs):
        messages.success(self.request, self.success_message)
        return super().delete(request, *args, **kwargs)