"""Tests for the Linux evdev/uinput backend."""

from unittest import mock

import pytest

from vibe_coded_mcp_desktop_control.linux_backend import LinuxEvdevBackend


@pytest.fixture
def mock_uinput() -> mock.MagicMock:
    """Patch evdev.UInput so tests do not require /dev/uinput access."""
    with mock.patch("vibe_coded_mcp_desktop_control.linux_backend.UInput") as patched:
        yield patched


def test_backend_initialization(mock_uinput: mock.MagicMock) -> None:
    """The backend should create a UInput device on initialization."""
    backend = LinuxEvdevBackend(layout="us")
    assert backend.layout == "us"
    mock_uinput.assert_called_once()
    backend.close()


def test_close_releases_device(mock_uinput: mock.MagicMock) -> None:
    """Closing the backend should close the underlying UInput device."""
    backend = LinuxEvdevBackend(layout="us")
    device = backend.ui
    backend.close()
    device.close.assert_called_once()
    assert backend.ui is None


def test_mouse_click(mock_uinput: mock.MagicMock) -> None:
    """A left mouse click should write press and release events."""
    backend = LinuxEvdevBackend(layout="us")
    device = backend.ui
    backend.mouse_action("left", "click")

    assert device.write.call_count == 2
    assert device.syn.call_count == 2


def test_keyboard_key_resolves_string(mock_uinput: mock.MagicMock) -> None:
    """A string key name should be resolved to an evdev keycode."""
    backend = LinuxEvdevBackend(layout="us")
    device = backend.ui
    backend.keyboard_key("ENTER", "click")

    assert device.write.call_count == 2
    assert device.syn.call_count == 2


def test_keyboard_action_unknown_logs_error(
    mock_uinput: mock.MagicMock, caplog: pytest.LogCaptureFixture
) -> None:
    """An unknown keyboard action should log an error and return."""
    backend = LinuxEvdevBackend(layout="us")
    with caplog.at_level("ERROR"):
        backend.keyboard_action("unknown_action")
    assert "Unknown keyboard action" in caplog.text