from django.views import generic
from django.urls import reverse, reverse_lazy
from django.shortcuts import get_object_or_404, redirect, render
from django.contrib.auth.mixins import PermissionRequiredMixin, LoginRequiredMixin
from django.contrib.admin.views.decorators import staff_member_required
from django.contrib import messages

from .models import Content, Category
from users.models import School
from . import forms
from settings.models import SiteSettings


class ViewCategory(generic.DetailView):
    """Affiche une catégorie."""
    model = Category
    template_name = "content/content_list.html"


class CreateCategory(generic.CreateView):
    """Création de catégorie."""
    model = Category
    fields = '__all__'
    template_name = "edit.html"

    @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(generic.CreateView, self).get_context_data(**kwargs)
        context['title'] = "Création de catégorie"
        return context


class DeleteCategory(generic.DeleteView):
    """Suppression de catégorie"""
    model = Category
    success_url = reverse_lazy('settings:index')
    template_name = "confirm_delete.html"

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


class EditCategory(generic.UpdateView):
    """Édition de catégorie."""
    model = Category
    fields = '__all__'
    template_name = "edit.html"

    @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(generic.UpdateView, self).get_context_data(**kwargs)
        context['title'] = "Édition de " + self.object.name
        return context


class DeleteContent(PermissionRequiredMixin, generic.DeleteView):
    """Suppression de contenu"""
    model = Content
    template_name = "confirm_delete.html"

    def get_success_url(self):
        return self.object.school_owner.get_absolute_url()

    def has_permission(self):
        school = get_object_or_404(Content, pk=self.kwargs['pk']).school_owner
        return self.request.user.is_staff or self.request.user == school.admin


def create_content(request, school_pk):
    settings,_ = SiteSettings.objects.get_or_create()
    if not settings.allow_upload :
        messages.error(request, "Le téléversement de contenu n'est pas autorisé actuellement.")
        return redirect(reverse("home"))
    school = get_object_or_404(School, pk=school_pk)
    can = request.user.is_staff or request.user == school.admin
    if not can:
        messages.error(request, 'Vous ne pouvez pas accéder à cette page')
        return redirect(reverse('home'))

    content_form = forms.CreateContent(school, request.POST or None, request.FILES or None)
    content_form.instance.school_owner = school

    if content_form.is_valid():
        content_form.save()
        messages.success(request, "Contenu ajouté.")
        return redirect(school.get_absolute_url())
    return render(request, 'edit.html', {
        'form' : content_form,
        'title' : 'Ajout de contenu',
        'validate' : 'Ajouter'
    })


def edit_content(request, pk):
    settings,_ = SiteSettings.objects.get_or_create()
    if not settings.allow_upload :
        messages.error(request, "Le téléversement de contenu n'est pas autorisé actuellement.")
        return redirect(reverse("home"))
    content = get_object_or_404(Content, pk=pk)
    school = content.school_owner
    can = request.user.is_staff or request.user == school.admin
    if not can:
        messages.error(request, 'Vous ne pouvez pas accéder à cette page')
        return redirect(reverse('home'))

    content_form = forms.ContentEdit(request.POST or None, request.FILES or None, instance=content)
    if content_form.is_valid():
        content_form.save()
        messages.success(request, "Contenu modifié.")
        return redirect(school.get_absolute_url())
    return render(request, 'edit.html', {
        'form' : content_form,
        'title' : 'Modifier un contenu',
        'validate' : 'Modifier'
    })