from collections.abc import Generator

import pytest
from fastapi.testclient import TestClient
from sqlalchemy import create_engine, text
from sqlalchemy.engine import make_url
from sqlmodel import Session, SQLModel

from app.core.config import settings
from app.core.db import engine, init_db
from app.main import app
from tests.utils.user import authentication_token_from_email
from tests.utils.utils import get_superuser_token_headers


@pytest.fixture(scope="session", autouse=True)
def flow_data(tmp_path_factory: pytest.TempPathFactory) -> Generator[None, None, None]:
    """Keep flows and secrets written by tests out of the real store."""
    root = tmp_path_factory.mktemp("flow-data")
    settings.FLOWS_DIR = root / "flows"
    settings.SECRETS_FILE = root / "secrets.enc"
    yield


@pytest.fixture(scope="session", autouse=True)
def db() -> Generator[Session, None, None]:
    """Create the throwaway database `tests/__init__.py` points at, drop it after."""
    url = make_url(str(settings.SQLALCHEMY_DATABASE_URI))
    # The teardown drops this database, so refuse to run against anything but
    # the dedicated test one.
    assert url.database and url.database.endswith("_test"), url.database

    maintenance = create_engine(
        url.set(database="postgres"), isolation_level="AUTOCOMMIT"
    )
    drop = text(f'DROP DATABASE IF EXISTS "{url.database}" WITH (FORCE)')
    with maintenance.connect() as connection:
        connection.execute(drop)
        connection.execute(text(f'CREATE DATABASE "{url.database}"'))

    SQLModel.metadata.create_all(engine)
    with Session(engine) as session:
        init_db(session)
        yield session

    engine.dispose()
    with maintenance.connect() as connection:
        connection.execute(drop)
    maintenance.dispose()


@pytest.fixture(scope="module")
def client() -> Generator[TestClient, None, None]:
    with TestClient(app) as c:
        yield c


@pytest.fixture(scope="module")
def superuser_token_headers(client: TestClient) -> dict[str, str]:
    return get_superuser_token_headers(client)


@pytest.fixture(scope="module")
def normal_user_token_headers(client: TestClient, db: Session) -> dict[str, str]:
    return authentication_token_from_email(
        client=client, email=settings.EMAIL_TEST_USER, db=db
    )