# SPDX-License-Identifier: GPL-3.0-or-later
"""Boundary tests for the desktop GUI package.

The logic module must not import tkinter so it can be tested on headless
runners; only app.py may import GUI libraries.
"""
import re
import tomllib
import unittest
from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]
GUI = ROOT / "enodia_sentinel" / "gui"


class TestGuiBoundaries(unittest.TestCase):
    def test_model_has_no_tkinter_imports(self):
        text = (GUI / "model.py").read_text()
        self.assertFalse(
            re.search(r"\b(import tkinter|from tkinter)\b", text),
            "model.py must not import tkinter",
        )

    def test_model_imports_without_tkinter(self):
        # Must succeed even when tkinter is unavailable.
        from enodia_sentinel.gui import model  # noqa: F401

    def test_app_module_imports_without_tkinter(self):
        # The shell is importable without a display/GUI libraries; runtime
        # use raises a graceful SystemExit when tkinter is absent.
        from enodia_sentinel.gui import app  # noqa: F401

    def test_pyproject_declares_gui_script(self):
        data = tomllib.loads((ROOT / "pyproject.toml").read_text())
        self.assertEqual(
            data["project"]["scripts"]["enodia-sentinel-gui"],
            "enodia_sentinel.gui.app:main",
        )
        # Core runtime deps stay empty; tkinter is stdlib.
        self.assertEqual(data["project"]["dependencies"], [])