from fastapi.testclient import TestClient

from app.main import create_app


def test_healthz_ok_on_migrated_empty_db(fresh_db_url):
    app = create_app(database_url=fresh_db_url)
    with TestClient(app) as client:
        resp = client.get("/healthz")
    assert resp.status_code == 200
    assert resp.json() == {"status": "ok"}


def test_startup_migrates_from_empty(fresh_db_url):
    # create_app on an empty DB must self-migrate so /healthz reports current.
    app = create_app(database_url=fresh_db_url)
    with TestClient(app) as client:
        assert client.get("/healthz").status_code == 200
    # the schema_migrations row exists -> migrations ran at startup
    import psycopg

    with psycopg.connect(fresh_db_url) as conn:
        n = conn.execute("SELECT count(*) FROM schema_migrations").fetchone()[0]
    assert n >= 1