# Copyright (C) 2018-2025 by BDE ENS Paris-Saclay
# SPDX-License-Identifier: GPL-3.0-or-later

from datetime import date

from django.contrib.auth.mixins import LoginRequiredMixin
from django.views.generic import DetailView, UpdateView
from django.utils.translation import gettext_lazy as _
from django_tables2 import SingleTableView
from permission.backends import PermissionBackend
from permission.views import ProtectQuerysetMixin, ProtectedCreateView
from django.urls import reverse_lazy

from .models import Family, Challenge, FamilyMembership, User
from .tables import FamilyTable, ChallengeTable, FamilyMembershipTable
from .forms import ChallengeUpdateForm, FamilyMembershipForm


class FamilyCreateView(ProtectQuerysetMixin, ProtectedCreateView):
    """
    Create family
    """
    model = Family
    extra_context = {"title": _('Create family')}

    def get_sample_object(self):
        return Family(
            name="",
            description="Sample family",
            score=0,
            rank=0,
        )


class FamilyListView(ProtectQuerysetMixin, LoginRequiredMixin, SingleTableView):
    """
    List existing Families
    """
    model = Family
    table_class = FamilyTable
    extra_context = {"title": _('Families list')}


class FamilyDetailView(ProtectQuerysetMixin, LoginRequiredMixin, DetailView):
    """
    Display details of a family
    """
    model = Family
    context_object_name = "family"
    extra_context = {"title": _('Family detail')}

    def get_context_data(self, **kwargs):
        """
        Add members list
        """
        context = super().get_context_data(**kwargs)

        family = self.object

        # member list
        family_member = FamilyMembership.objects.filter(
            family=family,
            year=date.today().year,
        ).filter(PermissionBackend.filter_queryset(self.request, FamilyMembership, "view"))\
            .order_by("user__username").distinct("user__username")

        membership_table = FamilyMembershipTable(data=family_member)
        context['member_list'] = membership_table

        # Check if the user has the right to create a membership, to display the button.
        empty_membership = FamilyMembership(
            family=family,
            user=User.objects.first(),
            year=date.today().year,
        )
        context["can_add_members"] = PermissionBackend()\
            .has_perm(self.request.user, "family.add_membership", empty_membership)

        return context


class FamilyUpdateView(ProtectQuerysetMixin, LoginRequiredMixin, UpdateView):
    """
    Update the information of a family.
    """
    model = Family
    context_object_name = "family"
    extra_context = {"title": _('Update family')}


class FamilyAddMemberView(ProtectQuerysetMixin, ProtectedCreateView):
    """
    Add a membership to a family
    """
    model = FamilyMembership
    form_class = FamilyMembershipForm
    template_name = 'family/add_member.html'
    extra_context = {"title": _("Add a new member to the family")}

    def get_sample_object(self):
        if "family_pk" in self.kwargs:
            family = Family.objects.get(pk=self.kwargs["family_pk"])
        else:
            family = FamilyMembership.objects.get(pk=self.kwargs["pk"]).family
        return FamilyMembership(
            user=self.request.user,
            family=family,
            year=date.today().year,
        )

    def get_success_url(self):
        return reverse_lazy('family:family_detail', kwargs={'pk': self.object.family.id})


class ChallengeCreateView(ProtectQuerysetMixin, ProtectedCreateView):
    """
    Create challenge
    """
    model = Challenge
    extra_context = {"title": _('Create challenge')}

    def get_sample_object(self):
        return Challenge(
            name="",
            description="Sample challenge",
            points=0,
        )

    def get_success_url(self):
        return reverse_lazy('family:challenge_list')


class ChallengeListView(ProtectQuerysetMixin, LoginRequiredMixin, SingleTableView):
    """
    List all challenges
    """
    model = Challenge
    table_class = ChallengeTable
    extra_context = {"title": _('Challenges list')}


class ChallengeDetailView(ProtectQuerysetMixin, LoginRequiredMixin, DetailView):
    """
    Display details of a challenge
    """
    model = Challenge
    context_object_name = "challenge"
    extra_context = {"title": _('Details of:')}

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        fields = ["name", "description", "points",]

        fields = dict([(field, getattr(self.object, field)) for field in fields])

        context["fields"] = [(
            Challenge._meta.get_field(field).verbose_name.capitalize(),
            value) for field, value in fields.items()]
        context["obtained"] = self.object.obtained
        context["update"] = PermissionBackend.check_perm(self.request, "family.change_challenge")

        return context


class ChallengeUpdateView(ProtectQuerysetMixin, LoginRequiredMixin, UpdateView):
    """
    Update the information of a challenge
    """
    model = Challenge
    context_object_name = "challenge"
    extra_context = {"title": _('Update challenge')}
    template_name = 'family/challenge_update.html'
    form_class = ChallengeUpdateForm

    def get_success_url(self, **kwargs):
        self.object.refresh_from_db()
        return reverse_lazy('family:challenge_detail', kwargs={'pk': self.object.pk})