from rest_framework.exceptions import ParseError
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
from django.contrib.auth import authenticate, login, logout
from rest_framework.generics import CreateAPIView
from rest_framework.permissions import IsAuthenticated
from apps.auth1.errors import USERNAME_OR_PASSWORD_WRONG
from rest_framework.exceptions import ParseError
import requests
import json
from django.conf import settings
from rest_framework_simplejwt.tokens import RefreshToken
from django.core.cache import cache
from apps.utils.sms import send_sms
from apps.utils.tools import rannum
from apps.utils.wxmp import wxmpClient
from apps.utils.wx import wxClient


from apps.auth1.serializers import CodeLoginSerializer, LoginSerializer, SendCodeSerializer, WxCodeSerializer
from apps.system.models import User
from apps.utils.viewsets import CustomGenericViewSet, CustomModelViewSet

# Create your views here.


def get_tokens_for_user(user: User):
    refresh = RefreshToken.for_user(user)
    return {
        'refresh': str(refresh),
        'access': str(refresh.access_token),
    }


class TokenBlackView(APIView):
    permission_classes = [IsAuthenticated]

    def post(self, request, *args, **kwargs):
        """
        Token拉黑


        Token拉黑
        """
        return Response(status=status.HTTP_200_OK)


class LoginView(CreateAPIView):
    """
    Session登录


    账户密码Session登录
    """
    authentication_classes = []
    permission_classes = []
    serializer_class = LoginSerializer

    def create(self, request, *args, **kwargs):
        serializer = self.get_serializer(data=request.data)
        serializer.is_valid(raise_exception=True)
        vdata = serializer.validated_data
        user = authenticate(username=vdata.get('username'),
                            password=vdata.get('password'))
        if user is not None:
            login(request, user)
            return Response(status=201)
        raise ParseError(**USERNAME_OR_PASSWORD_WRONG)


class LogoutView(APIView):
    authentication_classes = []
    permission_classes = []

    def post(self, request, *args, **kwargs):
        """
        退出登录


        退出登录
        """
        logout(request)
        return Response()


class WxmpLogin(CreateAPIView):
    """微信小程序自动登录

    微信小程序自动登录
    """
    authentication_classes = []
    permission_classes = []
    serializer_class = WxCodeSerializer

    def post(self, request):
        code = request.data['code']
        info = wxmpClient.get_basic_info(code=code)
        openid = info['openid']
        session_key = info['session_key']
        try:
            user = User.objects.get(wxmp_openid=openid, is_active=True)
            ret = get_tokens_for_user(user)
            ret['wxmp_session_key'] = session_key
            ret['wxmp_openid'] = openid
            cache.set(code, ret, 60*5)
            return Response(ret)
        except Exception:
            return Response({'wxmp_openid': openid, 'wxmp_session_key': session_key}, status=400)


class WxLogin(CreateAPIView):
    """微信公众号授权登录

    微信公众号授权登录
    """
    authentication_classes = []
    permission_classes = []
    serializer_class = WxCodeSerializer

    def post(self, request):
        code = request.data['code']
        info = wxClient.get_basic_info(code=code)
        openid = info['openid']
        access = info['access_token']
        try:
            user = User.objects.get(wx_openid=openid, is_active=True)
            ret = get_tokens_for_user(user)
            ret['wx_token'] = access
            ret['wx_openid'] = openid
            cache.set(code, ret, 60*5)
            return Response(ret)
        except Exception:
            return Response({'wx_openid': openid, 'wx_token': access}, status=400)


class GetTokenFromCache(CreateAPIView):
    """以code获取token

    以code获取token
    """
    authentication_classes = []
    permission_classes = []
    serializer_class = WxCodeSerializer

    def post(self, request):
        code = request.data['code']
        ret = cache.get(code, {})
        return Response(ret)


class SendCode(CreateAPIView):
    authentication_classes = []
    permission_classes = []
    serializer_class = SendCodeSerializer

    def post(self, request):
        """短信验证码发送

        短信验证码发送
        """
        phone = request.data['phone']
        code = rannum(4)
        is_ok, _ = send_sms(phone, 505, {'code': code})
        cache.set(phone, code, 60*5)
        if is_ok:
            return Response()
        raise ParseError('短信发送失败,请确认手机号')


class CodeLogin(CreateAPIView):
    """手机验证码登录

    手机验证码登录
    """
    authentication_classes = []
    permission_classes = []
    serializer_class = CodeLoginSerializer

    def post(self, request):
        phone = request.data['phone']
        code = request.data['code']
        code_exist = cache.get(phone, None)
        if code_exist == code:
            user = User.objects.filter(phone=phone).first()
            if user:
                ret = get_tokens_for_user(user)
                return Response(ret)
            raise ParseError('账户不存在或已禁用')
        raise ParseError('验证码错误')