import pytest
import factory
from httpx import ASGITransport, AsyncClient
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker

import web.models  # noqa: F401 — ensure all tables are registered on Base.metadata
from web.auth.password import hash_password
from web.database import Base, get_db
from web.main import app
from web.models.user import User, UserRoleEnum, UserStatusEnum


# ── Database fixtures ─────────────────────────────────────────────────────────

@pytest.fixture(scope="session")
def engine():
    eng = create_engine(
        "sqlite:///:memory:",
        echo=False,
        connect_args={"check_same_thread": False},
    )
    Base.metadata.create_all(eng)
    yield eng
    Base.metadata.drop_all(eng)


@pytest.fixture
def db_session(engine):
    connection = engine.connect()
    transaction = connection.begin()
    Session = sessionmaker(bind=connection)
    session = Session()
    yield session
    session.close()
    transaction.rollback()
    connection.close()


@pytest.fixture
def override_db(db_session):
    """Override FastAPI's get_db dependency with the transactional test session."""
    app.dependency_overrides[get_db] = lambda: db_session
    yield db_session
    app.dependency_overrides.clear()


# ── HTTP client ───────────────────────────────────────────────────────────────

@pytest.fixture
async def client(override_db):
    async with AsyncClient(
        transport=ASGITransport(app=app),
        base_url="http://test",
    ) as c:
        yield c


# ── Factories ─────────────────────────────────────────────────────────────────

class UserFactory(factory.alchemy.SQLAlchemyModelFactory):
    class Meta:
        model = User
        sqlalchemy_session_persistence = "commit"

    first_name = factory.Faker("first_name")
    last_name = factory.Faker("last_name")
    email = factory.Sequence(lambda n: f"user{n}@test.com")
    phone = factory.Sequence(lambda n: f"+7900{n:07d}")
    password_hash = factory.LazyFunction(lambda: hash_password("testpass123"))
    status = UserStatusEnum.active
    is_email_confirmed = True
    role = UserRoleEnum.user


@pytest.fixture
def user_factory(db_session):
    UserFactory._meta.sqlalchemy_session = db_session
    return UserFactory


@pytest.fixture
def active_user(user_factory):
    return user_factory.create()


@pytest.fixture
def admin_user(user_factory):
    return user_factory.create(role=UserRoleEnum.admin)


@pytest.fixture
def system_user(user_factory):
    return user_factory.create(role=UserRoleEnum.system)


@pytest.fixture
def pending_user(user_factory):
    return user_factory.create(
        status=UserStatusEnum.pending,
        is_email_confirmed=False,
        password_hash=None,
    )