from django.views.generic import CreateView, ListView, UpdateView, DeleteView
from django.views.generic.detail import DetailView
from django.views.generic.base import View, RedirectView
from django.utils.decorators import method_decorator
from django.contrib.auth.decorators import login_required
from django.shortcuts import get_object_or_404, render, redirect
from django.urls import reverse, reverse_lazy

from rest_framework import viewsets
from rest_framework.response import Response
from rest_framework.decorators import list_route
from rest_framework import permissions

from .serializers import NoteSerializer, NotebookSerializer
from .models import Note, Notebook
from .forms import NoteForm


@method_decorator(login_required, name='dispatch')
class LoggedInViewWithUser(View):

    def get_form_kwargs(self, **kwargs):
        kwargs = super().get_form_kwargs(**kwargs)
        kwargs.update({'user': self.request.user})
        return kwargs


class NoteListView(LoggedInViewWithUser, ListView):
    model = Note

    def get_queryset(self):
        if not self.request.user.is_anonymous:
            return Note.objects.filter(owner=self.request.user)

    def get_template_names(self):
        # print("IP Address for debug-toolbar: " + self.request.META['REMOTE_ADDR'])
        if not self.request.user.is_anonymous:
            return ['notes/notes_list.html']
        else:
            return ['sell.html']


class NoteListRedirectView(RedirectView, LoggedInViewWithUser):

    def get_redirect_url(self, *args, **kwargs):
        return reverse_lazy("notes:note-list", kwargs={"user": self.request.user.username})


class NoteDetailView(UpdateView, LoggedInViewWithUser):
    model = Note
    form_class = NoteForm
    template_name = 'notes/notes_detail.html'

    def get_queryset(self):
        if not self.request.user.is_anonymous:
            return Note.objects.filter(owner=self.request.user)

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['notes_list'] = Note.objects.filter(owner=self.request.user)
        return context


class NoteCreateView(CreateView, LoggedInViewWithUser):
    model = Note
    form_class = NoteForm
    template_name = 'notes/notes_create.html'

    def form_valid(self, form):
        form.instance.owner = self.request.user
        self.object = form.save()
        return super(NoteCreateView, self).form_valid(form)

    def get_success_url(self):
        return reverse_lazy('notes:note-detail', kwargs={'user': self.request.user.username, 'slug': self.object.slug})


class IsOwnerOrDeny(permissions.BasePermission):
    """
    Custom permission to only allow owners to post to their endpoint
    """

    def has_object_permission(self, request, view, obj):
        # Write permissions are only allowed to the owner of the snippet.
        return obj.owner == request.user


class NoteViewSet(viewsets.ModelViewSet):
    """
    API endpoint that allows notes to be viewed or edited.
    """
    serializer_class = NoteSerializer
    permission_classes = (permissions.IsAuthenticated,)

    def get_queryset(self):
        return Note.objects.filter(owner=self.request.user).order_by('-date_created')

    def perform_create(self, serializer):
        serializer.save(owner=self.request.user)

    def get_object(self):
        obj = get_object_or_404(self.get_queryset(), pk=self.kwargs["pk"])
        if obj.is_public:
            return obj
        else:
            self.check_object_permissions(self.request, obj)
            return obj


class NotebookViewSet(viewsets.ModelViewSet):
    """
    API endpoint that allows botebook to be viewed or edited.
    """
    serializer_class = NotebookSerializer

    def get_queryset(self):
        return Notebook.objects.filter(owner=self.request.user).order_by('-date_created')

    def perform_create(self, serializer):
        serializer.save(owner=self.request.user)