from itertools import chain
import json
from django.http import Http404, HttpResponse
from django.views.generic import ListView
from photos.models import LuxImage, LuxVideo
from django.shortcuts import render_to_response
from django.shortcuts import render
from django.template import RequestContext

class PaginatedListView(ListView):
    """
    handles my own pagination system
    """
    context_object_name = 'object_list'

    def dispatch(self, request, *args, **kwargs):
        path = request.path.split('/')[1:-1]
        if path[-1] == self.kwargs['page']:
            path = "/".join(t for t in path[:-1])
            request.page_url = "/" + path + '/%d/'
        else:
            request.page_url = request.path + '%d/'
        print(request.page_url)
        request.page = int(self.kwargs['page'])
        request.base_path = path
        return super(PaginatedListView, self).dispatch(request, *args, **kwargs)


def insert_image(request):
    """
    The view that handles the admin insert image/video feature
    """
    images = LuxImage.objects.all()[:50]
    videos = LuxVideo.objects.all()[:10]
    object_list = sorted(
        chain(images, videos),
        key=lambda instance: instance.pub_date,
        reverse=True
    )
    return render(request, 'admin/insert_images.html', {'object_list': object_list, 'textarea_id': request.GET['textarea']})
    

from taggit.models import Tag

from dal import autocomplete

class TagAutocomplete(autocomplete.Select2QuerySetView):
    def get_queryset(self):
        # Don't forget to filter out results depending on the visitor !
        if not self.request.user.is_authenticated:
            return Tag.objects.none()

        qs = Tag.objects.all()

        if self.q:
            qs = qs.filter(name__istartswith=self.q)

        return qs

from django.apps import apps

def nav_json(request, app, model, pk):
    model = apps.get_model(app_label=app, model_name=model)
    p = model.objects.get(pk=pk)
    data = {}
    data['prev'] = p.get_previous_admin_url
    data['next'] = p.get_next_admin_url
    data = json.dumps(data)
    return HttpResponse(data)