from django.contrib.auth.models import User, Group
from django.contrib.auth.mixins import PermissionRequiredMixin, LoginRequiredMixin
from django.views.generic import CreateView, UpdateView, DeleteView, DetailView
from django.contrib.auth.views import LoginView, LogoutView, PasswordChangeView, login_required
from django.contrib.auth.hashers import make_password
from django.contrib.messages.views import SuccessMessageMixin
from django.contrib import messages
from django.urls import reverse, reverse_lazy
from django.shortcuts import get_object_or_404, redirect

from .models import UserProfile, SchoolProfile
from content.models import Content


class CreateUser(CreateView):
    model = User
    fields = [
        'first_name',
        'last_name',
        'email',
        'username',
        'password',
    ]
    template_name = 'edit.html'

    def get_success_url(self):
        return reverse(
            'users:create-userprofile',
            kwargs={'pk': self.object.pk}
        )

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['title'] = "Inscription"
        context['validate'] = "S'inscrire"
        return context

    def form_valid(self, form):
        r = super().form_valid(form)
        self.object.set_password(form.cleaned_data['password'])
        self.object.save()
        return r

class Profile(LoginRequiredMixin, UpdateView):
    model = User
    template_name = 'users/profile.html'
    fields = [
        'username',
        'first_name',
        'last_name',
        'email'
    ]

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['title'] = self.object.username
        context['validate'] = "Modifier"
        return context

    def get_success_url(self):
        return reverse(
            'users:profile',
            kwargs={'pk': self.object.pk}
        )


class CreateUserProfile(CreateView):
    model = UserProfile
    fields = ['school']
    template_name = 'edit.html'

    success_url = reverse_lazy('home')

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['title'] = "Choix de l'école"
        context['validate'] = "Choisir"
        return context

    def form_valid(self, form):
        form.instance.user = get_object_or_404(User, pk=self.kwargs['pk'])
        return super(CreateUserProfile, self).form_valid(form)


class CreateSchool(LoginRequiredMixin, PermissionRequiredMixin, CreateView):
    permission_required = 'users.add_schoolprofile'
    model = Group
    fields = ['name']
    template_name = 'edit.html'
    success_url = reverse_lazy('settings:index')

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

    def form_valid(self, form):
        response = super(CreateSchool, self).form_valid(form)
        profile = SchoolProfile()
        profile.group = form.instance
        profile.save()
        return response


class EditSchool(LoginRequiredMixin, PermissionRequiredMixin, UpdateView):
    model = Group
    fields = ['name']
    template_name = 'edit.html'
    queryset = Group.objects.filter(school__isnull=False)

    def get_success_url(self):
        return reverse('users:school', kwargs={'pk':self.object.pk})

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['title'] = "Édition de l'école"
        context['validate'] = "Modifier"
        return context

    def has_permission(self):
        return self.request.user.has_perm('users.manage_'+str(self.kwargs['pk']))

    def form_valid(self, *args, **kwargs):
        r = super().form_valid(*args, **kwargs)
        self.object.school.save()
        return r


class DeleteSchool(LoginRequiredMixin, PermissionRequiredMixin, DeleteView):
    model = Group
    permission_required = 'users.delete_schoolprofile'


class School(LoginRequiredMixin, PermissionRequiredMixin, DetailView):
    model = Group
    template_name = "users/school.html"

    def get_context_data(self, **kwargs):
        context = super().get_context_data()
        context['contents'] = Content.objects.filter(school_owner=self.object.school)
        context['school'] = True
        context['members'] = User.objects.filter(userprofile__school=self.object.school)
        context['manager_right'] = 'auth.manage_' + str(self.object.pk)
        context['manager_group'],_ = Group.objects.get_or_create(name=str(self.object.pk)+'_admins')
        return context

    def has_permission(self):
        return self.request.user.has_perm('users.view_'+str(self.kwargs['pk']))


class Logout(SuccessMessageMixin, LogoutView):
    success_message = "Vous vous êtes bien déconnecté."


class Login(SuccessMessageMixin, LoginView):
    template_name = "edit.html"
    success_message = "Bienvenue !"
    extra_context = {
        'title' : "Connexion",
        'validate' : "Se connecter",
    }


class PasswordChange(SuccessMessageMixin, PasswordChangeView):
    template_name = "edit.html"
    success_url = reverse_lazy("home")
    success_message = "Le mot de passe a été changé."
    extra_context = {
        'title' : "Changer le mot de passe",
        'validate' : "Changer",
    }


@login_required
def promote_user(request, school_pk, user_pk):
    school = get_object_or_404(Group, pk=school_pk)
    user = get_object_or_404(User, pk=user_pk)
    if request.user.has_perm('manage_'+str(school.pk)):
        admins,_ = Group.objects.get_or_create(name=str(school.pk)+'_admins')
        user.groups.add(admins)
        user.save()
        messages.success(request, user.username + ' a été ajouté aux administrateurs de ' + school.name)
        return redirect(reverse('users:school', kwargs={'pk':school.pk}))
    messages.error(request, "Vous n'aves pas ce droit.")
    return redirect('home')


@login_required
def degrade_user(request, school_pk, user_pk):
    school = get_object_or_404(Group, pk=school_pk)
    user = get_object_or_404(User, pk=user_pk)
    if request.user.has_perm('manage_'+str(school.pk)):
        admins,_ = Group.objects.get_or_create(name=str(school.pk)+'_admins')
        user.groups.remove(admins)
        user.save()
        messages.success(request, user.username + ' a été enlevé des administrateurs de ' + school.name)
        return redirect(reverse('users:school', kwargs={'pk':school.pk}))
    messages.error(request, "Vous n'aves pas ce droit.")
    return redirect('home')