""" non-interactive pages """
from dateutil.relativedelta import relativedelta
from django.db.models import Avg, StdDev, Count, F, Q
from django.template.response import TemplateResponse
from django.utils import timezone
from django.views.decorators.http import require_GET

from bookwyrm import models, settings


@require_GET
def about(request):
    """more information about the instance"""
    six_months_ago = timezone.now() - relativedelta(months=6)
    six_month_count = models.User.objects.filter(
        is_active=True, local=True, last_active_date__gt=six_months_ago
    ).count()
    data = {
        "active_users": six_month_count,
        "status_count": models.Status.objects.filter(
            user__local=True, deleted=False
        ).count(),
        "admins": models.User.objects.filter(groups__name__in=["admin", "moderator"]),
        "version": settings.VERSION,
    }

    books = models.Edition.objects.exclude(cover__exact="")

    total_ratings = models.Review.objects.filter(
        user__local=True, deleted=False
    ).count()
    data["top_rated"] = (
        books.annotate(
            rating=Avg(
                "review__rating",
                filter=Q(review__user__local=True, review__deleted=False),
            ),
            rating_count=Count(
                "review__rating",
                filter=Q(review__user__local=True, review__deleted=False),
            ),
        )
        .annotate(weighted=F("rating") * F("rating_count") / total_ratings)
        .filter(weighted__gt=0)
        .order_by("-weighted")
        .first()
    )

    data["controversial"] = (
        books.annotate(
            deviation=StdDev(
                "review__rating",
                filter=Q(review__user__local=True, review__deleted=False),
            ),
            rating_count=Count(
                "review__rating",
                filter=Q(review__user__local=True, review__deleted=False),
            ),
        )
        .annotate(weighted=F("deviation") * F("rating_count") / total_ratings)
        .filter(weighted__gt=0)
        .order_by("-weighted")
        .first()
    )

    data["wanted"] = (
        books.annotate(
            shelf_count=Count("shelves", filter=Q(shelves__identifier="to-read"))
        )
        .order_by("-shelf_count")
        .first()
    )

    return TemplateResponse(request, "about/about.html", data)


@require_GET
def conduct(request):
    """more information about the instance"""
    return TemplateResponse(request, "about/conduct.html")


@require_GET
def privacy(request):
    """more information about the instance"""
    return TemplateResponse(request, "about/privacy.html")