"""
Shared fixtures for installer unit tests.

Resets stale tkinter MagicMocks before each test so that tests in
test_screen.py don't hit exhausted side-effect iterators left over from
test_navigation.py (which replaces sys.modules["tkinter"] at module level).
"""
import sys
from pathlib import Path
import pytest
from unittest.mock import MagicMock

# Ensure the repository root is first on sys.path so we import the local
# `installer` package (and not a site-packages name collision).
_REPO_ROOT = Path(__file__).resolve().parents[2]
if str(_REPO_ROOT) not in sys.path:
    sys.path.insert(0, str(_REPO_ROOT))

import knoe.screen as _screen_module


@pytest.fixture(autouse=True)
def reset_tkinter_mock():
    """
    Before each test, replace any stale tkinter MagicMock with a fresh
    instance both in sys.modules and in knoe.screen module namespace,
    so TerminalConsole widget calls don't hit exhausted side-effect iterators.
    """
    original_screen_tk = getattr(_screen_module, "tk", None)
    if isinstance(original_screen_tk, MagicMock):
        fresh = MagicMock()
        _screen_module.tk = fresh
        for mod_name in (
            "tkinter",
            "tkinter.ttk",
            "tkinter.scrolledtext",
            "tkinter.messagebox",
        ):
            if mod_name in sys.modules and isinstance(sys.modules[mod_name], MagicMock):
                sys.modules[mod_name] = fresh
    yield
    # Restore original reference so other tests in the suite are unaffected
    if isinstance(original_screen_tk, MagicMock):
        _screen_module.tk = original_screen_tk