# -*- mode: python; coding: utf-8 -*-
# Copyright (C) 2017-2019 by BDE ENS Paris-Saclay
# SPDX-License-Identifier: GPL-3.0-or-later

from django.contrib import messages
from django.contrib.auth.decorators import login_required, permission_required
from django.contrib.auth.models import User, Group
from django.db import transaction
from django.shortcuts import redirect, render
from django.template.context_processors import csrf
from django.utils.translation import ugettext_lazy as _
from rest_framework import viewsets
from reversion import revisions as reversion

from users.forms import BaseInfoForm
from users.models import Adhesion, User
from .serializers import UserSerializer, GroupSerializer


def form(ctx, template, request):
    c = ctx
    c.update(csrf(request))
    return render(request, template, c)


@login_required
def edit_info(request):
    """
    Edite son utilisateur
    """
    user = BaseInfoForm(request.POST or None, instance=request.user)
    if user.is_valid():
        with transaction.atomic(), reversion.create_revision():
            user.save()
            reversion.set_user(request.user)
            reversion.set_comment("Champs modifié(s) : %s" % ', '.join(
                field for field in user.changed_data))
        messages.success(request, "L'user a bien été modifié")
        return redirect("index")
    return form({
        'form': user,
        'password_change': True,
        'title': _('Edit user profile'),
    }, 'users/user.html', request)


@login_required
@permission_required('users.add_adhesion')
def adherer(request, userid):
    try:
        users = User.objects.get(pk=userid)
    except User.DoesNotExist:
        messages.error(request, "Utilisateur inexistant")
        return redirect("admin:users_user_changelist")
    adh_year = Adhesion.objects.all().order_by('starting_in').reverse().first()
    if not adh_year:
        messages.error(request, "Année d'adhésion non définie")
        return redirect("admin:users_user_changelist")
    with transaction.atomic(), reversion.create_revision():
        reversion.set_user(request.user)
        adh_year.members.add(users)
        adh_year.save()
        reversion.set_comment("Adhesion de %s" % users)
    messages.success(request, "Adhesion effectuee")
    return redirect("admin:users_user_changelist")


class UserViewSet(viewsets.ModelViewSet):
    """
    API endpoint that allows users to be viewed or edited.
    """
    queryset = User.objects.all()
    serializer_class = UserSerializer


class GroupViewSet(viewsets.ModelViewSet):
    """
    API endpoint that allows groups to be viewed or edited.
    """
    queryset = Group.objects.all()
    serializer_class = GroupSerializer