# coding=utf-8
import json
from django.db.models import Sum, F
from django.db import transaction
from django.db.models import Q
from rest_framework.views import APIView
from utils.custom_modelviewset import CustomModelViewSet
from .serializers import *
from .filters import *
from apps.log.models import BizLog
from apps.base import Formater
from utils import response_ok, response_error
from utils.permission import isLogin
from apps.order.models import Order
from apps.WeChatResponse import WechatAppletPay
from django.contrib.auth import get_user_model

User = get_user_model()


class ProductView(APIView):

    def get(self, request):
        data = []
        queryset = Product.objects.filter(enable=True)
        for row in queryset:
            item = {
                'id':row.id,
                'name':row.name,
                'month':row.month,
            }
            data.append(item)
        return response_ok(data)

class ProductViewSet(CustomModelViewSet):
    permission_classes = [isLogin, ]
    queryset = Product.objects.filter()
    serializer_class = ProductSerializer

    def filter_queryset(self, queryset):
        f = ProductFilter(self.request.GET, queryset=queryset)
        return f.qs

class OrderViewSet(CustomModelViewSet):
    permission_classes = [isLogin, ]
    queryset = Order.objects.filter()
    serializer_class = OrderSerializer

    def list(self, request, *args, **kwargs):
        # 底栏合计
        queryset = self.filter_queryset(self.get_queryset())
        total = queryset.aggregate(total_amount=Sum('total_amount'), balance_deduction=Sum('balance_deduction'),
                                   actual_amount=Sum('actual_amount'))
        totalRow = {'totalRow': 1,
                    'total_amount': Formater.formatPriceShow(total['total_amount']),
                    'balance_deduction': Formater.formatPriceShow(total['balance_deduction']),
                    'actual_amount': Formater.formatPriceShow(total['actual_amount'], )}
        page = self.paginate_queryset(queryset)
        if page is not None:
            serializer = self.get_serializer(page, many=True)
            data = serializer.data
            if len(data) > 0:
                data.append(totalRow)
            return self.get_paginated_response(data)

        serializer = self.get_serializer(queryset, many=True)
        return response_ok(serializer.data)

    def filter_queryset(self, queryset):
        queryset = queryset.filter(Q(create_user=self.request.user))
        f = OrderFilter(self.request.GET, queryset=queryset)
        return f.qs

    def create(self, request, *args, **kwargs):
        try:
            with transaction.atomic():
                serializer = self.get_serializer(data=request.data)
                if serializer.is_valid(raise_exception=True):
                    instance = serializer.save()
                    BizLog.objects.addnew(self.request.user, BizLog.INSERT,
                                          u'添加订单[%s]，id=%d' % (instance.id), request.data)
                    return response_ok()
        except CustomError as e:
            return response_error(e.get_error_msg())
        except Exception as e:
            import traceback
            traceback.print_exc()
            return response_error(str(e))