from rest_framework import serializers
from .models import Vucem, CredencialesImportador




class VucemSerializer(serializers.ModelSerializer):
    importadores = serializers.SerializerMethodField()

    class Meta:
        model = Vucem
        fields = '__all__'
        read_only_fields = ('created_at', 'updated_at', 'organizacion', 'created_by', 'updated_by')

    def get_importadores(self, obj):
        # Importar aquí para evitar importación circular
        from api.customs.serializers import ImportadorSerializer
        return [ImportadorSerializer(cred.rfc).data for cred in obj.usuarios_importadores.all()]


class CredencialesImportadorSimpleSerializer(serializers.ModelSerializer):
    class Meta:
        model = CredencialesImportador
        fields = ('__all__')
        read_only_fields = ('updated_at',)


class CredencialesImportadorSerializer(serializers.ModelSerializer):

    class Meta:
        model = CredencialesImportador
        fields = '__all__'
        read_only_fields = ('updated_at',)

    def to_representation(self, instance):
        representation = super().to_representation(instance)
        representation['vucem'] = VucemSerializer(instance.vucem).data
        return representation