from django.http import HttpResponseRedirect, HttpResponse

from .functions import HttpRequest, service_log
from .settings import WECHAT_ID_SECRET
from Niko.settings import DEBUG


# https://mp.weixin.qq.com/wiki?t=resource/res_main&id=mp1421140842
# 微信获取openid接口callback ，必须等于redirect_uri
def wechat_openid(request):
    # 第二步：通过code换取网页授权access_token
    if DEBUG:
        service_log('打印微信登录callback参数')
        service_log(request.build_absolute_uri())
    code = request.GET.get('code')
    state = request.GET.get('state')
    http_request = HttpRequest('https://api.weixin.qq.com/sns/oauth2/access_token')
    data = {
        'appid': WECHAT_ID_SECRET['appID'],
        'secret': WECHAT_ID_SECRET['AppSecret'],
        'code': code,
        'grant_type': 'authorization_code',
    }
    result = http_request.get(data)
    result = eval(result)  # 如果获取openid到这里结束
    if DEBUG:
        service_log('打印获取微信open id的返回值')
        service_log(result)
    try:
        if DEBUG:
            service_log('打印获取微信返回值的state')
            service_log(state)
        if 'Base' in state:
            request.session['wechat_openid'] = result['openid']
            if 'Volunteer' in state:  # 如果志愿者用户登录返回个人用户界面
                return HttpResponseRedirect('/cq/volunteer/')
    except Exception as e:
        print(e)
        # 如果报错在servicelog里面记录下来
        if result['errcode']:
            service_log(result['errcode'])
            service_log(result['errmsg'])
            return HttpResponse('系统错误，请联系网站管理员')

    # 第三步：刷新access_token（如果需要） skip
    # 第四步：拉取用户信息(需scope为 snsapi_userinfo)
    http_request = HttpRequest('https://api.weixin.qq.com/sns/oauth2/access_token')
    data = {
        'access_token': result['access_token'],
        'openid': result['openid'],
        'lang': 'zh_CN',
    }
    result = http_request.get(data)
    result = eval(result)
    if 'UserInfo' in state:
        request.session['wechat_openid'] = result['openid']
        request.session['wechat_userinfo'] = result
        if 'Volunteer' in state:  # 如果志愿者用户登录返回个人用户界面
            return HttpResponseRedirect('/cq/volunteer/')


# 微信验证返回信息
def wechat_authorize_domain(request):
    return HttpResponse('nWvJfsXLyqPEqBTg')