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

from .models import Content, Category
from settings.models import SiteSettings


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


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

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


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


class EditCategory(PermissionRequiredMixin, generic.UpdateView):
    """Édition de catégorie."""
    model = Category
    fields = '__all__'
    template_name = "edit.html"
    permission_required = 'content.change_category'
    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 CreateContent(PermissionRequiredMixin, generic.CreateView):
    """Création de contenu."""
    model = Content
    fields = [
        'name',
        'category',
        'file'
    ]
    template_name = "edit.html"
    extra_context = {
        'title' : 'Envoi de contenu',
        'validate' : 'Envoyer'
    }

    def has_permission(self):
        return self.request.user.has_perm('users.manage_'+str(self.request.user.userprofile.school.group.pk))

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

    def form_valid(self, form):
        form.instance.school_owner = self.request.user.userprofile.school
        r = super().form_valid(form)
        return r

    def dispatch(self, request, *args, **kwargs):
        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"))
        return super().dispatch(request, *args, **kwargs)


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.has_perm('users.manage_'+str(school.group.pk))


class EditContent(PermissionRequiredMixin, generic.UpdateView):
    """Édition d'un contenu"""
    model = Content
    template_name = "edit.html"
    fields = [
        'name',
        'category',
        'file'
    ]
    template_name = "edit.html"
    extra_context = {
        'title' : 'Édition de contenu',
        'validate' : 'Envoyer'
    }

    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.has_perm('users.manage_'+str(school.group.pk))

    def dispatch(self, request, *args, **kwargs):
        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"))
        return super().dispatch(request, *args, **kwargs)