# coding=utf-8

from django.contrib.auth import get_user_model, authenticate

from rest_framework import serializers
from rest_framework_jwt.serializers import JSONWebTokenSerializer
from rest_framework_jwt.settings import api_settings
from apps.log.models import BizLog
from utils import get_remote_addr
from apps.tenant.employee.models import Employee
from apps.tenant.models import Pay,Invoice
from apps.base import Formater

User = get_user_model()
jwt_payload_handler = api_settings.JWT_PAYLOAD_HANDLER
jwt_encode_handler = api_settings.JWT_ENCODE_HANDLER

class TenantJWTSerializer(JSONWebTokenSerializer):
    def validate(self, attrs):
        credentials = {
            self.username_field: attrs.get(self.username_field),
            'password': attrs.get('password')
        }

        if all(credentials.values()):
            user = authenticate(**credentials)

            if user:
                if not user.is_admin():
                    msg = u'非工作账号，禁止登录'
                    raise serializers.ValidationError(msg)

                employee = Employee.objects.filter(user=user).first()
                if not user.is_active:
                    msg = u'禁用帐户，禁止登录'
                    BizLog.objects.addnew(employee.tenant, user,  BizLog.INSERT,u'禁用帐户[%s]尝试登录系统,IP[%s]' % (user.username, get_remote_addr(self.request)))
                    raise serializers.ValidationError(msg)

                payload = jwt_payload_handler(user)
                BizLog.objects.addnew(employee.tenant, user, BizLog.INSERT,
                                      u'[%s]登录系统,IP[%s]' % (user.username,get_remote_addr(self.request)))

                return {
                    'token': jwt_encode_handler(payload),
                    'user_id': user.id,
                    'username': user.username,
                    'user_type': user.type,
                }
            else:
                msg = u'账号或者密码错误!'
                raise serializers.ValidationError(msg)
        else:
            msg = u'必须包含“{username field}”和“password.'
            msg = msg.format(username_field=self.username_field)
            raise serializers.ValidationError(msg)

class PaySerializer(serializers.ModelSerializer):
    status_text = serializers.CharField(source='get_status_display', read_only=True)
    pay_channel_text = serializers.CharField(source='get_pay_channel_display', read_only=True)
    tenant = serializers.DateTimeField(source='tenant.company_name', read_only=True)
    username = serializers.CharField(source='user.employee.name', read_only=True)
    amount = serializers.SerializerMethodField()

    def get_amount(self, obj):
        return Formater.formatAmountShow(obj.amount)

    class Meta:
        model = Pay
        fields = '__all__'

class InvoiceSerializer(serializers.ModelSerializer):
    status_text = serializers.CharField(source='get_status_display', read_only=True)
    tenant = serializers.DateTimeField(source='tenant.company_name', read_only=True)
    username = serializers.CharField(source='user.employee.name', read_only=True)

    class Meta:
        model = Invoice
        fields = '__all__'

    def create(self, validated_data):
        validated_data['user'] = self.context['request'].user
        validated_data['tenant'] = self.context['request'].user.employee.tenant
        instance = super(InvoiceSerializer, self).create(validated_data)
        return instance