from rest_framework import serializers

from django.contrib.auth.models import User
from django.db.utils import IntegrityError

from api.models import UserProfile

class UserResponceSerializer(serializers.Serializer):
    id = serializers.IntegerField()
    email = serializers.EmailField()
    name = serializers.CharField(source='first_name')
    surname = serializers.CharField(source='last_name')
    phone_number = serializers.CharField(source='userprofile.phone_number')
    image = serializers.CharField(source='userprofile.image')
    uuid = serializers.SerializerMethodField()
    def get_uuid(self, obj):
        try:
            return str(obj.userprofile.uuid)[:6]
        except Exception as e:
            print(f"Serializer UUID Error: {e}")  # лог ошибки
            return None
        
class ClientRegisterSerializer(serializers.ModelSerializer):
    phone_number = serializers.CharField(max_length=13)
    privacy_accepted = serializers.BooleanField()
    email = serializers.EmailField(required=True)
    username = serializers.CharField(source='first_name')
    uuid = serializers.SerializerMethodField()
    
    class Meta:
        model = User
        fields = ['id', 'uuid', 'username', 'email', 'password', 'phone_number', 'privacy_accepted']
        extra_kwargs = {
            'password' : {'write_only':True},
            'email' : {'required' : True, 'unique': True},
            'phone_number' : {'required' : True, 'unique': True},
        }
        
    def validate_phone_number(self, value):
        if len(value) > 18:
            raise serializers.ValidationError("Номер телефона не может быть таким длинным")
        return value
    
    def validate_privacy_accepted(self, value):
        if not value:
            raise serializers.ValidationError("Необходимо принять условия политики конфиденциальности")
    
    def create(self, validated_data):
        privacy_accepted = validated_data.pop('privacy_accepted')
        phone_number = validated_data.pop('phone_number')
        name = validated_data.pop('first_name')
        
        try:
            user = User.objects.create_user(
                username=validated_data['name'],
                email=validated_data['email'],
                password=validated_data['password'],
                first_name = name,
            )
            
            UserProfile.objects.create(
                user=user,
                phone_number=phone_number,
                privacy_accepted=privacy_accepted
            )
            
            return user
        
        except IntegrityError:
            raise serializers.ValidationError({"email": "Пользователь с таким email уже существует"})