from datetime import timedelta

from django.conf import settings
from django.contrib.auth import get_user_model
from django.core.cache import cache
from django.utils import timezone

from . import render
from ...threads.models import Post, Thread, Attachment
from ...users.models import DataDownload

VERSION_CHECK_CACHE_KEY = "misago_version_check"

User = get_user_model()


def admin_index(request):
    totals = count_db_items()
    checks = {
        "address": check_forum_address(request),
        "cache": check_cache(),
        "data_downloads": check_data_downloads(),
        "debug": check_debug_status(),
        "https": check_https(request),
        "inactive_users": check_inactive_users(),
    }

    return render(
        request,
        "misago/admin/dashboard/index.html",
        {"totals": totals, "checks": checks},
    )


def check_cache():
    cache.set("misago_cache_test", "ok")
    return {"is_ok": cache.get("misago_cache_test") == "ok"}


def check_debug_status():
    return {"is_ok": not settings.DEBUG}


def check_https(request):
    return {"is_ok": request.is_secure()}


def check_forum_address(request):
    set_address = request.settings.forum_address
    correct_address = request.build_absolute_uri("/")

    return {
        "is_ok": set_address == correct_address,
        "set_address": set_address,
        "correct_address": correct_address,
    }


def check_data_downloads():
    cutoff = timezone.now() - timedelta(days=3)
    unprocessed_count = DataDownload.objects.filter(
        status__lte=DataDownload.STATUS_PROCESSING, requested_on__lte=cutoff
    ).count()

    return {"is_ok": unprocessed_count == 0, "count": unprocessed_count}


def check_inactive_users():
    count = User.objects.exclude(requires_activation=User.ACTIVATION_NONE).count()
    return {"is_ok": count <= 10, "count": count}


def count_db_items():
    return {
        "attachments": Attachment.objects.count(),
        "threads": Thread.objects.count(),
        "posts": Post.objects.count(),
        "users": User.objects.count(),
    }