# coding=utf-8

import json
from rest_framework.decorators import action
from django.db import transaction
from utils.permission import IsAdministrator
from utils.custom_modelviewset import CustomModelViewSet
from apps.coupon.models import Coupon, CouponItem
from apps.coupon.filters import CouponFilter, CouponItemFilter
from .serializers import CouponSerializer, CouponItemSerializer
from utils.exceptions import CustomError
from utils import response_ok
from apps.system.models import SysLog

class CouponViewSet(CustomModelViewSet):
    permission_classes = [IsAdministrator, ]
    queryset = Coupon.objects.filter(delete=False)
    serializer_class = CouponSerializer

    def filter_queryset(self, queryset):
        queryset = queryset.filter(tenant=self.request.user.employee.tenant)
        f = CouponFilter(self.request.GET, queryset=queryset)
        return f.qs

    def perform_create(self, serializer):
        super(CouponViewSet, self).perform_create(serializer)
        instance = serializer.instance
        validated_data = serializer.validated_data
        tenant_log(self.request.user.employee, BizLog.INSERT, u'添加优惠券[%s]，id=%d' % (instance.name, instance.id), validated_data)

    def perform_update(self, serializer):
        super(CouponViewSet, self).perform_update(serializer)
        instance = serializer.instance
        validated_data = serializer.validated_data
        tenant_log(self.request.user.employee, BizLog.UPDATE, u'修改优惠券[%s]，id=%d' % (instance.name, instance.id), validated_data)

    def destroy(self, request, *args, **kwargs):
        with transaction.atomic():
            instance = self.get_object()
            if instance.tenant != request.user.employee.tenant:
                raise CustomError(u'禁止跨租户操作！')
            instance.delete = True
            instance.save()
            tenant_log(self.request.user.employee, BizLog.DELETE, u'删除优惠券[%s]，id=%d' % (instance.name, instance.id))
        return response_ok()