# coding=utf-8
from rest_framework import serializers
from apps.tenant.models import Tenant
from apps.tenant.employee.models import Employee
from utils.exceptions import CustomError
from apps.account.models import User

class TenantSerializer(serializers.ModelSerializer) :
    create_user_name = serializers.CharField(source='create_user.username', read_only=True)
    create_time = serializers.DateTimeField(format='%Y-%m-%d %H:%M', read_only=True)
    username = serializers.SerializerMethodField()

    class Meta:
        model = Tenant
        fields = '__all__'

    def get_username(self, obj):
        names = Employee.objects.filter(tenant=obj, user__type=User.TENANT).values('name')
        name = []
        for i in names:
            name.append(i.get('name'))
        return '，'.join(name)

    def create(self, validated_data):
        validated_data['create_user'] = self.context['request'].user
        if Tenant.is_exist(validated_data['name']):
            raise CustomError(u'名称为[%s]的租户已存在' % validated_data['name'])
        instance = super(TenantSerializer, self).create(validated_data)
        return instance

    def update(self, instance, validated_data):
        if instance.delete:
            raise CustomError(u'租户[%s]已经被删除，禁止修改' % instance.name)
        if Tenant.is_exist(validated_data['name'], instance.id):
            raise CustomError(u'名称为[%s]的租户已存在' % validated_data['name'])

        instance = super(TenantSerializer, self).update(instance, validated_data)
        return instance