import pytest
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker

from app.core.database import Base
from app.modules.auth.models import User


@pytest.fixture
def db():
    engine = create_engine("sqlite:///:memory:", connect_args={"check_same_thread": False})
    Base.metadata.create_all(bind=engine)
    Session = sessionmaker(bind=engine)
    session = Session()
    yield session
    session.close()
    Base.metadata.drop_all(bind=engine)


def test_create_user(db):
    user = User(username="testuser", full_name="Test User", pw_hash="hashed")
    db.add(user)
    db.commit()
    db.refresh(user)
    assert user.id is not None
    assert user.username == "testuser"
    assert user.is_active is True
    assert user.is_admin is False
    assert user.created_at is not None


def test_user_defaults(db):
    user = User(username="alice", full_name="Alice")
    db.add(user)
    db.commit()
    db.refresh(user)
    assert user.pw_hash is None
    assert user.email is None
    assert user.department is None
    assert user.last_login is None


def test_username_must_be_unique(db):
    db.add(User(username="dup", full_name="First"))
    db.commit()
    db.add(User(username="dup", full_name="Second"))
    with pytest.raises(Exception):
        db.commit()