from itertools import chain
import json
from django.urls import reverse
from django.http import Http404, HttpResponse
from django.views.generic import ListView, DetailView
from django.apps import apps
from django.shortcuts import render_to_response
from django.shortcuts import render
from django.template import RequestContext

from photos.models import LuxImage, LuxVideo
from recordings.models import Audio


BREADCRUMBS = {
    'SrcPost':'SRC',
    'Book':'Book Notes',
    'Entry':'Jrnl'
}

class PaginatedListView(ListView):
    """
    handles my own pagination system and breadcrumbs
    """
    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 get_context_data(self, **kwargs):
        '''
        Adds breadcrumb path to every view
        '''
        # Call the base implementation first to get a context
        context = super(PaginatedListView, self).get_context_data(**kwargs)
        try:
            context['breadcrumbs'] = (BREADCRUMBS[self.model.__name__],)
        except KeyError:
            context['breadcrumbs'] = (self.model._meta.verbose_name_plural,)
        return context


class LuxDetailView(DetailView):
    """
    handles breadcrumbs for detail pages
    """
    def get_context_data(self, **kwargs):
        '''
        Adds breadcrumb path to every view
        '''
        # Call the base implementation first to get a context
        context = super(LuxDetailView, self).get_context_data(**kwargs)
        print(self.object._meta.verbose_name_plural)
        try:
            context['breadcrumbs'] = (BREADCRUMBS[self.object._meta.model],)
        except KeyError:
            if self.object._meta.verbose_name_plural == 'posts':
                context['breadcrumbs'] = (self.object.get_post_type_display()+"s",)
                context['crumb_url'] = "/%ss/" % self.object.get_post_type_display()
            else:
                context['breadcrumbs'] = (self.object._meta.verbose_name_plural,)
        try:
            context['crumb_url']
        except KeyError:
            try:
                context['crumb_url'] = reverse('%s:list' % self.object._meta.verbose_name_plural)
            except:
                # special case for pages:
                context['breadcrumbs'] = (self.object.title,)
                context['crumb_url'] = None
        return context


def insert_image(request):
    """
    The view that handles the admin insert image/video feature
    """
    images = LuxImage.objects.all()[:80]
    videos = LuxVideo.objects.all()[:10]
    audio = Audio.objects.all()[:40]
    object_list = sorted(
        chain(images, videos, audio),
        key=lambda instance: instance.pub_date,
        reverse=True
    )
    return render(request, 'admin/insert_images.html', {'object_list': object_list, 'textarea_id': request.GET['textarea']})


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)