import pytest
from django.core.exceptions import ValidationError as DjangoValidationError
from rest_framework.exceptions import ValidationError as DRFValidationError
from core.users.services import UserService
from django.contrib.auth import get_user_model

User = get_user_model()

@pytest.mark.django_db
class TestUserService:

    def setup_method(self):
        self.user = User.objects.create_user(
            email="servis@primjer.hr", 
            password="password123"
        )

    def test_update_profile_success(self):
        """Testira uspješno ažuriranje profila preko servisa."""
        new_data = {"first_name": "Novi", "last_name": "Korisnik"}
        
        updated_user = UserService.update_user_profile(self.user, new_data)
        
        assert updated_user.first_name == "Novi"
        assert updated_user.last_name == "Korisnik"
        # Provjera da email nije promijenjen ako nismo poslali
        assert updated_user.email == "servis@primjer.hr"

    def test_update_profile_invalid_data(self):
        """Testira validaciju (npr. neispravan format podataka)."""
        # Pretpostavimo da dodamo logiku u serializer koja brani prazno ime
        invalid_data = {"first_name": ""} 
        
        with pytest.raises(DRFValidationError):
            UserService.update_user_profile(self.user, invalid_data)