import csv
import io
from typing import Any

from django.contrib import messages
from django.contrib.messages.views import SuccessMessageMixin
from django.http import HttpResponse, HttpResponseRedirect
from django.urls import reverse_lazy
from django.utils.translation import gettext_lazy as _
from django.views.generic import CreateView, DeleteView, FormView, UpdateView
from django_filters.views import FilterView
from rules.contrib.views import PermissionRequiredMixin

from members.filters import MemberFilter
from members.forms import MassUploadForm, MemberForm
from members.models import Member

from ..mixins import HTMXViewMixin


class MemberListView(HTMXViewMixin, PermissionRequiredMixin, FilterView):
    filterset_class = MemberFilter
    paginate_by = 50
    permission_denied_message = _("You do not have permission to view this page.")
    permission_required = "members.view_member"
    partial_name = "members/member_filter.html#content"
    menu_highlight = "members"

    def handle_no_permission(self) -> HttpResponseRedirect:
        messages.error(self.request, self.get_permission_denied_message())
        return HttpResponseRedirect(reverse_lazy("backend:index"))

    def get_filterset_kwargs(self, filterset_class) -> dict[str, Any]:
        kwargs = super().get_filterset_kwargs(filterset_class)

        filter_values = {} if kwargs["data"] is None else kwargs["data"].dict()

        if not filter_values:
            filter_values.update({"user__is_active": "true"})

        kwargs["data"] = filter_values
        return kwargs


class MemberAddView(HTMXViewMixin, PermissionRequiredMixin, SuccessMessageMixin, CreateView):
    model = Member
    form_class = MemberForm
    permission_required = "members.add_member"
    permission_denied_message = _("You do not have permission to view this page.")
    success_message = _("Member <strong>%(name)s</strong> has been created successfully.")
    success_url = reverse_lazy("backend:members:list")
    partial_name = "members/member_form.html#content"
    menu_highlight = "members"

    def handle_no_permission(self) -> HttpResponseRedirect:
        messages.error(self.request, self.get_permission_denied_message())
        return HttpResponseRedirect(reverse_lazy("backend:index"))

    def get_success_message(self, cleaned_data):
        return self.success_message % dict(cleaned_data, name=self.object.user.get_full_name())


class MemberEditView(HTMXViewMixin, PermissionRequiredMixin, SuccessMessageMixin, UpdateView):
    model = Member
    form_class = MemberForm
    permission_required = "members.change_member"
    permission_denied_message = _("You do not have permission to view this page.")
    success_message = _("Member <strong>%(name)s</strong> has been updated successfully.")
    success_url = reverse_lazy("backend:members:list")
    partial_name = "members/member_form.html#content"
    menu_highlight = "members"

    def handle_no_permission(self) -> HttpResponseRedirect:
        messages.error(self.request, self.get_permission_denied_message())
        return HttpResponseRedirect(reverse_lazy("backend:index"))

    def get_success_message(self, cleaned_data):
        return self.success_message % dict(cleaned_data, name=self.object.user.get_full_name())

    def get_initial(self):
        initial = super().get_initial()
        user = self.get_object().user

        initial.update({"first_name": user.first_name, "last_name": user.last_name, "email": user.email, "admin": user.is_superuser})

        return initial


class MemberDeleteView(HTMXViewMixin, PermissionRequiredMixin, SuccessMessageMixin, DeleteView):
    model = Member
    success_message = _("Member <strong>%(name)s</strong> has been deleted successfully.")
    permission_required = "members.delete_member"
    permission_denied_message = _("You do not have permission to view this page.")
    success_url = reverse_lazy("backend:members:list")
    partial_name = "members/member_confirm_delete.html#content"
    menu_highlight = "members"

    def handle_no_permission(self) -> HttpResponseRedirect:
        messages.error(self.request, self.get_permission_denied_message())
        return HttpResponseRedirect(reverse_lazy("backend:index"))

    def get_success_message(self, cleaned_data):
        return self.success_message % dict(cleaned_data, name=self.object.user.get_full_name())

    def post(self, request, *args, **kwargs):
        self.object = self.get_object()

        # Soft delete user
        self.object.user.is_active = False
        self.object.user.save()

        # Do not delete the member object
        messages.success(self.request, self.get_success_message({"name": self.object.user.get_full_name()}))
        return HttpResponseRedirect(self.get_success_url())


class MemberLoadView(PermissionRequiredMixin, HTMXViewMixin, SuccessMessageMixin, FormView):
    form_class = MassUploadForm
    permission_required = "members.add_member"
    permission_denied_message = _("You do not have permission to view this page.")
    success_url = reverse_lazy("backend:members:list")
    success_message = _("Members have been added successfully.")
    partial_name = "members/member_load.html#content"
    menu_highlight = "members"
    template_name = "members/member_load.html"

    def handle_no_permission(self) -> HttpResponseRedirect:
        messages.error(self.request, self.get_permission_denied_message())
        return HttpResponseRedirect(reverse_lazy("backend:index"))

    def form_valid(self, form: MassUploadForm) -> HttpResponse:
        member_data = self.request.FILES["members_data"]

        with io.TextIOWrapper(member_data.file) as csvfile:
            reader = csv.reader(csvfile)

            for row in reader:
                member_information = {"first_name": row[0], "last_name": row[1], "email": row[2], "birthday": row[3], "license": row[4]}
                member = Member.create(first_name=member_information["fist_name"], last_name=member_information["last_name"], email=member_information["email"])

                member.license = member_information["license"]
                if member_information["birthday"] is not None and member_information["birthday"] != "":
                    member.birthday = member_information["birthday"]

                member.save(update_fields=["license", "birthday"])

        return super().form_valid(form)