import base64

import pytest

from server.main import manager


@pytest.fixture
def fake_screenshot() -> str:
    """Return a reproducible base64 string representing a dummy screenshot."""
    return base64.b64encode(b"clickthrough-dummy").decode()


@pytest.fixture
def default_grid_request(fake_screenshot):
    return {
        "width": 640,
        "height": 480,
        "screenshot_base64": fake_screenshot,
        "rows": 3,
        "columns": 3,
    }


@pytest.fixture(autouse=True)
def reset_manager_state():
    manager._grids.clear()
    yield
    manager._grids.clear()