import os

import pytest
from fastapi.testclient import TestClient


@pytest.fixture
def client(tmp_data_dir):
    from imptune.main import app

    with TestClient(app) as c:
        yield c


@pytest.fixture
def tmp_data_dir(tmp_path, monkeypatch):
    """Set DATA_DIR to a temp directory so tests don't write to /data."""
    data_dir = tmp_path / "data"
    data_dir.mkdir()
    monkeypatch.setenv("DATA_DIR", str(data_dir))
    # Patch config module so the app uses the temp dir
    import imptune.config as cfg

    cfg.DATA_DIR = str(data_dir)
    cfg.DB_PATH = str(data_dir / "imptune.db")
    cfg.DRIVERS_DIR = str(data_dir / "drivers")
    return data_dir