import importlib.util
from pathlib import Path
from unittest.mock import Mock

import pytest


def _load_command():
    module_path = (
        Path(__file__).resolve().parents[2]
        / "src"
        / "fenrirscreenreader"
        / "commands"
        / "onCursorChange"
        / "65000-present_line_if_cursor_change_vertical.py"
    )
    spec = importlib.util.spec_from_file_location(
        "fenrir_present_line_if_cursor_change_vertical", module_path
    )
    module = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(module)
    return module.command()


def _build_environment(screen_name):
    settings_manager = Mock()
    settings_manager.get_setting_as_bool.side_effect = (
        lambda section, setting: section == "focus" and setting == "cursor"
    )
    output_manager = Mock()

    return {
        "commandsIgnore": {"onScreenUpdate": {"INCOMING_IGNORE": False}},
        "screen": {
            "newTTY": screen_name,
            "new_cursor": {"x": 0, "y": 1},
            "new_content_text": "first line\nsecond line",
        },
        "runtime": {
            "BarrierManager": Mock(),
            "CursorManager": Mock(is_cursor_vertical_move=Mock(return_value=True)),
            "OutputManager": output_manager,
            "ScreenManager": Mock(
                is_screen_change=Mock(return_value=False),
                is_delta=Mock(return_value=True),
            ),
            "SettingsManager": settings_manager,
        },
    }


@pytest.mark.unit
def test_pty_vertical_cursor_move_speaks_line_despite_repaint_delta():
    command = _load_command()
    env = _build_environment("pty")
    command.initialize(env)

    command.run()

    env["runtime"]["OutputManager"].present_text.assert_called_once_with(
        "second line", interrupt=True, flush=False
    )
    assert env["commandsIgnore"]["onScreenUpdate"]["INCOMING_IGNORE"] is True


@pytest.mark.unit
def test_non_pty_vertical_cursor_move_still_suppresses_delta():
    command = _load_command()
    env = _build_environment("1")
    command.initialize(env)

    command.run()

    env["runtime"]["OutputManager"].present_text.assert_not_called()
    assert env["commandsIgnore"]["onScreenUpdate"]["INCOMING_IGNORE"] is False


@pytest.mark.unit
def test_pty_dialog_button_row_speaks_nearby_question():
    command = _load_command()
    env = _build_environment("pty")
    env["screen"]["new_cursor"] = {"x": 30, "y": 4}
    env["screen"]["new_content_text"] = "\n".join(
        [
            "".ljust(80),
            "".ljust(80),
            "Do you want to save changes?".center(80),
            "".ljust(80),
            "< Yes >   < No >".center(80),
            "".ljust(80),
        ]
    )
    command.initialize(env)

    command.run()

    env["runtime"]["OutputManager"].present_text.assert_called_once_with(
        "Do you want to save changes?\n< Yes > < No >",
        interrupt=True,
        flush=False,
    )
    assert env["commandsIgnore"]["onScreenUpdate"]["INCOMING_IGNORE"] is True


@pytest.mark.unit
def test_pty_blank_cursor_line_does_not_suppress_nonblank_delta():
    command = _load_command()
    env = _build_environment("pty")
    env["screen"]["new_cursor"] = {"x": 0, "y": 1}
    env["screen"]["new_content_text"] = "Birthday soon\n".ljust(80)
    env["screen"]["new_delta"] = "Birthday soon"
    command.initialize(env)

    command.run()

    env["runtime"]["OutputManager"].present_text.assert_not_called()
    assert env["commandsIgnore"]["onScreenUpdate"]["INCOMING_IGNORE"] is False