import json
from datetime import date
from jinja2 import Environment
import urllib.parse

from django.urls import reverse
from django.conf import settings
from django.utils import translation


def get_app_config(request):
    info_dict = {
        'debug': settings.DEBUG,
        'isAuthenticated': False,
        'user': None,
        'urlPrefix': '{}://{}'.format(request.scheme, request.get_host()),
    }
    if request.user and request.user.is_authenticated:
        info_dict['isAuthenticated'] = True
        info_dict['user'] = {
            'username': request.user.username,
            'email': request.user.email,
            'isSuperUser': request.user.is_superuser,
            'isStaff': request.user.is_staff,
            'lastLogin': request.user.last_login.strftime('%Y-%m-%d')
        }
    return json.dumps(info_dict, separators=(',', ':'))


def copyright():
    return '©{} - PingCAP University'.format(date.today().strftime('%Y'))


def environment(**options):
    env = Environment(**options)
    env.install_gettext_translations(translation)
    env.globals.update({
        'json_loads': json.loads,
        'json_dumps': json.dumps,
        'reverse': reverse,
        'get_app_config': get_app_config,
        'url_quote': urllib.parse.quote,
        'copyright': copyright
    })
    return env