import requests
from django.contrib.auth import get_user_model
from django.http import Http404, JsonResponse
from django.utils.translation import gettext as _
from requests.exceptions import RequestException

from . import render
from ... import __version__
from ...conf import settings
from ...core.cache import cache
from ...threads.models import Post, Thread

VERSION_CHECK_CACHE_KEY = "misago_version_check"

User = get_user_model()


def admin_index(request):
    inactive_users_queryset = User.objects.exclude(
        requires_activation=User.ACTIVATION_NONE
    )

    db_stats = {
        "threads": Thread.objects.count(),
        "posts": Post.objects.count(),
        "users": User.objects.count(),
        "inactive_users": inactive_users_queryset.count(),
    }

    return render(
        request,
        "misago/admin/index.html",
        {
            "db_stats": db_stats,
            "address_check": check_misago_address(request),
            "version_check": cache.get(VERSION_CHECK_CACHE_KEY),
        },
    )


def check_misago_address(request):
    set_address = settings.MISAGO_ADDRESS
    correct_address = request.build_absolute_uri("/")

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


def check_version(request):
    if request.method != "POST":
        raise Http404()

    version = cache.get(VERSION_CHECK_CACHE_KEY, "nada")

    if version == "nada":
        try:
            api_url = "https://pypi.org/pypi/Misago/json"
            r = requests.get(api_url)
            r.raise_for_status()

            latest_version = r.json()["info"]["version"]

            if latest_version == __version__:
                version = {
                    "is_error": False,
                    "message": _("Up to date! (%(current)s)")
                    % {"current": __version__},
                }
            else:
                version = {
                    "is_error": True,
                    "message": _("Outdated: %(current)s! (latest: %(latest)s)")
                    % {"latest": latest_version, "current": __version__},
                }

            cache.set(VERSION_CHECK_CACHE_KEY, version, 180)
        except (RequestException, IndexError, KeyError, ValueError):
            version = {
                "is_error": True,
                "message": _("Failed to connect to pypi.org API. Try again later."),
            }

    return JsonResponse(version)