''' non-interactive pages '''
from django.db.models import Avg, Max
from django.template.response import TemplateResponse
from django.views import View

from bookwyrm import forms, models
from .feed import Feed
from .helpers import get_activity_feed


# pylint: disable= no-self-use
class About(View):
    ''' create invites '''
    def get(self, request):
        ''' more information about the instance '''
        data = {
            'title': 'About',
        }
        return TemplateResponse(request, 'discover/about.html', data)

class Home(View):
    ''' discover page or home feed depending on auth '''
    def get(self, request):
        ''' this is the same as the feed on the home tab '''
        if request.user.is_authenticated:
            feed_view = Feed.as_view()
            return feed_view(request, 'home')
        discover_view = Discover.as_view()
        return discover_view(request)

class Discover(View):
    ''' preview of recently reviewed books '''
    def get(self, request):
        ''' tiled book activity page '''
        books = models.Edition.objects.filter(
            review__published_date__isnull=False,
            review__user__local=True,
            review__privacy__in=['public', 'unlisted'],
        ).exclude(
            cover__exact=''
        ).annotate(
            Max('review__published_date')
        ).order_by('-review__published_date__max')[:6]

        ratings = {}
        for book in books:
            reviews = models.Review.objects.filter(
                book__in=book.parent_work.editions.all()
            )
            reviews = get_activity_feed(
                request.user, ['public', 'unlisted'], queryset=reviews)
            ratings[book.id] = reviews.aggregate(Avg('rating'))['rating__avg']
        data = {
            'title': 'Discover',
            'register_form': forms.RegisterForm(),
            'books': list(set(books)),
            'ratings': ratings
        }
        return TemplateResponse(request, 'discover/discover.html', data)