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 waffle.mixins import WaffleFlagMixin

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, WaffleFlagMixin, 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"
    waffle_flag = "TF_MASS_UPLOAD"

    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)