# -*- coding: utf-8 -*-

from __future__ import division

from django.conf import settings
from django.core.urlresolvers import reverse
from django.db import transaction
from django.shortcuts import redirect
from django_logit import logit
from furl import furl

from account.models import UserInfo
from utils.redis.connect import r


@logit
@transaction.atomic
def oauth_redirect(request):
    unique_identifier = request.GET.get(settings.WECHAT_UNIQUE_IDENTIFICATION, '')

    user, created = UserInfo.objects.select_for_update().get_or_create(**{settings.WECHAT_UNIQUE_IDENTIFICATION: unique_identifier})
    user.unionid = request.GET.get('unionid', '')
    user.openid = request.GET.get('openid', '')
    user.nickname = request.GET.get('nickname', '')
    user.avatar = request.GET.get('headimgurl', '')
    user.save()

    token_check_key = user.user_id

    query_params = {
        settings.TOKEN_CHECK_KEY: token_check_key,
        'vtoken': r.token(token_check_key, ex=False, buf=False),
    }

    return redirect(furl(reverse('page:course_code')).add(request.GET).add(query_params).url)