from django.db import transaction

from rest_framework import serializers

from core.apps.finance.models import Expence, ExpenceChat, ExpenceMessage


class ExpenceMessageListSerializer(serializers.ModelSerializer):
    user = serializers.SerializerMethodField(method_name='get_user')

    class Meta:
        model = ExpenceMessage
        fields = [
            'id', 'user', 'message', 'file'
        ]
    
    def get_user(self, obj):
        return {
            'id': obj.user.id,
            'full_name': obj.user.full_name,
            'profile_image': obj.user.profile_image.url if obj.user.profile_image else None,
        }


class ExpenceMessageCreateSerializer(serializers.ModelSerializer):
    class Meta:
        model = ExpenceMessage
        fields = [
            'message', 'file', 'chat'
        ]
    
    def create(self, validated_data):
        with transaction.atomic():
            return ExpenceMessage.objects.create(
                message=validated_data.get('message'),
                file=validated_data.get('file'),
                user=self.context.get('user'),
                chat=validated_data.get('chat'),
            )