from django.views.generic import TemplateView, UpdateView, CreateView, DetailView, DeleteView
from django.urls import reverse_lazy, reverse
from django.contrib.auth.mixins import PermissionRequiredMixin, LoginRequiredMixin
from django.contrib.admin.views.decorators import staff_member_required
from django.contrib.auth.models import Group, User
from django.shortcuts import get_object_or_404, redirect, render
from django.contrib import messages

from content.models import Category
from users.models import School
from .models import SiteSettings, StaticPage
from .forms import SelectUserForm


class SettingsView(LoginRequiredMixin, PermissionRequiredMixin, TemplateView):
    template_name = "settings/settings.html"
    permission_required = 'settings.change_sitesettings'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['categories'] = Category.objects.all()
        context['site_settings'], _ = SiteSettings.objects.get_or_create()
        context['schools'] = School.objects.all()
        context['settings'] = True
        context['administrators'] = User.objects.filter(is_staff=True)
        context['static_pages'] = StaticPage.objects.all()
        return context


class EditSiteSettingsView(LoginRequiredMixin, PermissionRequiredMixin, UpdateView):
    template_name = "edit.html"
    model = SiteSettings
    fields = '__all__'
    success_url = reverse_lazy('settings:index')
    permission_required = 'settings.change_sitesettings'

    def get_object(self, queryset=None):
        obj,_ = self.model.objects.get_or_create()
        return obj

    def get_context_data(self, **kwargs):
        context = super(UpdateView, self).get_context_data(**kwargs)
        context['title'] = "Édition des " + self.object.PRETTY_NAME
        return context


class CreateStaticPageView(LoginRequiredMixin, CreateView):
    template_name = "edit.html"
    model = StaticPage
    fields = '__all__'
    success_url = reverse_lazy('settings:index')

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context["title"] = "Création de page statique"
        context["validate"] = "Créer"
        return context

    @classmethod
    def as_view(self, *args, **kwargs):
        view = super().as_view(*args, **kwargs)
        return staff_member_required(view)


class StaticPageView(DetailView):
    template_name = "settings/static_page.html"
    model = StaticPage
    fields = '__all__'
    @classmethod
    def as_view(self, *args, **kwargs):
        view = super().as_view(*args, **kwargs)
        return staff_member_required(view)

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['page'] = self.object
        return context


class DeleteStaticPageView(DeleteView):
    template_name = "confirm_delete.html"
    model = StaticPage
    success_url = reverse_lazy('settings:index')
    @classmethod
    def as_view(self, *args, **kwargs):
        view = super().as_view(*args, **kwargs)
        return staff_member_required(view)


class EditStaticPageView(UpdateView):
    template_name = "edit.html"
    model = StaticPage
    success_url = reverse_lazy('settings:index')
    fields = '__all__'
    @classmethod
    def as_view(self, *args, **kwargs):
        view = super().as_view(*args, **kwargs)
        return staff_member_required(view)

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context["title"] = "Édition de page statique"
        context["validate"] = "Éditer"
        return context


@staff_member_required
def degrade_user(request, pk):
    user = get_object_or_404(User, pk=pk)
    user.is_staff = False
    user.save()
    messages.success(request, user.username + ' a été enlevé des administrateurs du site')
    return redirect(reverse('settings:index'))


@staff_member_required
def promote_user(request):
    user_form = SelectUserForm(request.POST or None)
    user_form.populate()
    if user_form.is_valid():
        user=user_form.get_user()
        user.is_staff = True
        user.save()
        messages.success(request, user.username + ' a été ajouté des administrateurs du site')
        return redirect(reverse('settings:index'))
    return render(request, 'edit.html', {
        'form' : user_form,
        'title' : "Ajout d'un administrateur",
        'validate' : "Ajouter"
    })