from django.contrib.auth import get_user_model
from rest_framework import serializers
from rest_framework_nested.relations import NestedHyperlinkedRelatedField

from uncloud import AMOUNT_DECIMALS, AMOUNT_MAX_DIGITS

class UserSerializer(serializers.HyperlinkedModelSerializer):

    balance = serializers.DecimalField(max_digits=AMOUNT_MAX_DIGITS,
                                       decimal_places=AMOUNT_DECIMALS)

    bill_endpoint = serializers.HyperlinkedIdentityField(
        view_name='user-bill-list',
        lookup_field='username',
        lookup_url_kwarg='user_pk'
    )

    order_endpoint = serializers.HyperlinkedIdentityField(
        view_name='user-order-list',
        lookup_field='username',
        lookup_url_kwarg='user_pk'
    )

    address_endpoint = serializers.HyperlinkedIdentityField(
        view_name='user-address-list',
        lookup_field='username',
        lookup_url_kwarg='user_pk'
    )

    payment_method_endpoint = serializers.HyperlinkedIdentityField(
        view_name='user-payment-method-list',
        lookup_field='username',
        lookup_url_kwarg='user_pk'
    )

    payment_endpoint = serializers.HyperlinkedIdentityField(
        view_name='user-payment-list',
        lookup_field='username',
        lookup_url_kwarg='user_pk'
    )

    class Meta:
        model = get_user_model()
        fields = ['username', 'email', 'balance', 'maximum_credit',
                'bill_endpoint', 'order_endpoint', 'address_endpoint',
                'payment_method_endpoint', 'payment_endpoint']

class ImportUserSerializer(serializers.Serializer):
    username = serializers.CharField()