from rest_framework.filters import SearchFilter, OrderingFilter
from rest_framework.permissions import IsAuthenticated
from rest_framework.views import APIView
from rest_framework.viewsets import ModelViewSet
from rest_framework.response import Response
from rest_framework.permissions import IsAuthenticated
from rest_framework.decorators import action
from rest_framework import status
from django_filters.rest_framework import DjangoFilterBackend
from openpyxl import Workbook, load_workbook
import requests
from rest_framework_jwt.serializers import jwt_encode_handler, jwt_payload_handler
import json

from utils.custom import CommonPagination
from rbac.permission import RbacPermission
from .models import Company, Consumer, PaySubject
from .serializers import CompanySerializer, ConsumerSerializer, ConsumerCUSerializer
from server import settings
from question.models import Questioncat

appid = 'wx5c39b569f01c27db'
secret = '68762892f8df2b4a0b1940c5250a8dc0'

class CompanyViewSet(ModelViewSet):
    """
    客户企业：增删改查
    """
    perms_map = (
        {'*': 'admin'}, {'*': 'company_all'}, {'get': 'company_list'}, {'post': 'company_create'},
        {'put': 'company_update'}, {'delete': 'company_delete'})
    queryset = Company.objects.filter(is_delete=0).all()
    serializer_class = CompanySerializer
    pagination_class = None #不分页
    filter_backends = [DjangoFilterBackend,SearchFilter, OrderingFilter]
    search_fields = ('^name',)
    ordering_fields = ('id',)
    ordering = ['-id']
    
    def check_permissions(self, request):
        """
        Check if the request should be permitted.
        Raises an appropriate exception if the request is not permitted.
        """
        if request.method == 'GET':
            pass
        else:
            for permission in self.get_permissions():
                if not permission.has_permission(request, self):
                    self.permission_denied(
                        request, message=getattr(permission, 'message', None)
                    )

    def destroy(self, request, *args, **kwargs): #逻辑删除
        instance = self.get_object()
        # self.perform_destroy(instance)
        instance.is_delete = True
        instance.save()
        return Response(status=status.HTTP_204_NO_CONTENT)

class ConsumerViewSet(ModelViewSet):
    """
    学员：增删改查
    """
    perms_map = (
        {'*': 'admin'}, {'*': 'consumer_all'}, {'get': 'consumer_list'}, {'post': 'consumer_create'},
        {'put': 'consumer_update'}, {'delete': 'consumer_delete'})
    queryset = Consumer.objects.filter(is_delete=0).all()
    serializer_class = ConsumerSerializer
    pagination_class = CommonPagination
    ordering_fields = ('id',)
    ordering = ['id']
    filter_backends = [DjangoFilterBackend, SearchFilter, OrderingFilter]
    filterset_fields = ('company',)
    search_fields = ('^name',)
    
    def get_serializer_class(self):
        if self.action == 'list':
            return ConsumerSerializer
        else:
            return ConsumerCUSerializer

    def destroy(self, request, *args, **kwargs): #逻辑删除
        instance = self.get_object()
        # self.perform_destroy(instance)
        instance.is_delete = True
        instance.save()
        return Response(status=status.HTTP_204_NO_CONTENT)

    @action(methods=['post'], detail=False, permission_classes=[IsAuthenticated],
            url_path='import', url_name='import_consumer')
    def import_consumer(self, request):
        """
        导入用户
        """
        xlsxpath = request.data['path']
        fullpath = settings.BASE_DIR + xlsxpath
        wb = load_workbook(fullpath)
        sheet = wb.worksheets[0]
        # 验证文件内容
        if sheet['a2'].value != '姓名':
            return Response({"error":"姓名列错误!"})
        if sheet['b2'].value != '账户(微信绑定的手机号)':
            return Response({"error":"账户列错误!"})
        if sheet['c2'].value != '单位':
            return Response({"error":"单位列错误!"})
        companydict = {}
        consumerdict = {}
        companys = Company.objects.filter(is_delete=0)
        for i in companys:
            companydict[i.name] = i.id
        i = 3
        while sheet['B'+str(i)].value:
            name = sheet['A'+str(i)].value
            if name:
                name = name.replace(' ', '')
            username = sheet['B'+str(i)].value
            if username:
                username = str(username).replace(' ', '')
            companyname = sheet['C'+str(i)].value
            if companyname:
                companyname = companyname.replace(' ', '')
            if companyname not in companydict:
                 return Response({"error":"不存在单位("+companyname+")!请先新建"})
            else:
                companyobj = Company.objects.get(id=companydict[companyname])
            if Consumer.objects.filter(username = username).exists():
                consumerdict[username]=i
            else:
                obj = Consumer()
                obj.name = name
                obj.username = username
                obj.company = companyobj
                obj.save()
                subjects = Questioncat.objects.filter(is_subject=True,is_delete=False)
                if subjects.exists():
                    PaySubject.objects.create(subject=subjects.first(), consumer=obj)
            i = i + 1
        if consumerdict:
            return {"code":206,"data":consumerdict,"msg":"导入部分成功"}
        else:
            return Response(status=status.HTTP_200_OK)


class ConsumerMPLoginView(APIView):
    """
    小程序登陆颁发token
    """
    authentication_classes=()
    permission_classes=()
    def post(self, request, *args, **kwargs):
        code = request.data['code']
        info = requests.get('https://api.weixin.qq.com/sns/jscode2session?appid='+appid+'&secret='+secret+'&js_code=' +
                        code+'&grant_type=authorization_code').content.decode('utf-8')
        info = json.loads(info)
        openid = info['openid']
        session_key = info['session_key']
        try:
            consumer = Consumer.objects.get(openid = openid)
            serializer = ConsumerSerializer(instance=consumer)
        except:
            return Response("匿名用户",status=status.HTTP_401_UNAUTHORIZED)
        payload = jwt_payload_handler(consumer)
        token = jwt_encode_handler(payload)
        return Response({"token":token,"session_key":session_key, "openid":openid, "userinfo":serializer.data})

class ConsumerLogoutView(APIView):
    authentication_classes = ()
    permission_classes = ()
    def get(self, request, *args, **kwargs):
        return Response(status=status.HTTP_200_OK)