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
from .serializers import CompanySerializer, ConsumerSerializer
from server import settings

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 = ('is_paid','company')
    search_fields = ('^name',)
    

    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.is_paid = True
                obj.save()
            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)