from database.manager import DatabaseManager


def test_database_manager_reuses_engine_for_same_sqlite_path(tmp_path):
    DatabaseManager._instance_cache.clear()
    db_url = f"sqlite:///{tmp_path / 'cache.db'}"

    first = DatabaseManager(db_url)
    second = DatabaseManager(db_url)

    try:
        assert second.engine is first.engine
        assert second.Session is first.Session
    finally:
        DatabaseManager._instance_cache.clear()
        first.engine.dispose()


def test_database_manager_uses_bounded_postgres_pool(monkeypatch):
    import config
    import database.manager as manager

    captured = {}

    class FakeEngine:
        def dispose(self):
            pass

    class FakeSession:
        pass

    def fake_create_engine(url, **kwargs):
        captured["url"] = url
        captured["kwargs"] = kwargs
        return FakeEngine()

    def fake_sessionmaker(bind):
        captured["session_bind"] = bind
        return FakeSession

    DatabaseManager._instance_cache.clear()
    monkeypatch.setattr(config, "DATABASE_TYPE", "postgresql")
    monkeypatch.setattr(config, "DATABASE_PATH", "postgresql://example/db")
    monkeypatch.setattr(manager, "create_engine", fake_create_engine)
    monkeypatch.setattr(manager, "sessionmaker", fake_sessionmaker)
    monkeypatch.setattr(manager, "ensure_metadata_initialized", lambda *args, **kwargs: None)
    monkeypatch.setattr(DatabaseManager, "_init_autoheal_tables", lambda self: None)

    db = DatabaseManager()

    assert captured["url"] == "postgresql://example/db"
    assert captured["kwargs"]["pool_pre_ping"] is True
    assert captured["kwargs"]["pool_size"] == 2
    assert captured["kwargs"]["max_overflow"] == 3
    assert captured["kwargs"]["pool_recycle"] == 1800
    assert captured["kwargs"]["pool_timeout"] == 30
    assert captured["kwargs"]["connect_args"]["connect_timeout"] == 10
    assert "statement_timeout=60000" in captured["kwargs"]["connect_args"]["options"]
    assert db.engine is captured["session_bind"]

    DatabaseManager._instance_cache.clear()