"""Shared libraries must import without the desktop application or Qt."""
import os
from pathlib import Path
import subprocess
import sys
import tempfile
import unittest


class LibraryBoundaryTests(unittest.TestCase):
    def test_cores_import_with_gui_and_qt_blocked(self):
        root = Path(__file__).resolve().parents[1]
        code = '''
import importlib, importlib.abc, pkgutil, sys
class BlockGui(importlib.abc.MetaPathFinder):
    def find_spec(self, fullname, path=None, target=None):
        if fullname.split('.')[0] in ('gui_desktop', 'PySide6', 'PySide2'):
            raise ImportError('Application dependency in shared core: ' + fullname)
sys.meta_path.insert(0, BlockGui())
for name in ('logic_analyzer', 'set_devices'):
    package = importlib.import_module(name)
    for module in pkgutil.walk_packages(package.__path__, name + '.'):
        if '.qt_ports' not in module.name:
            importlib.import_module(module.name)
assert 'gui_desktop' not in sys.modules
'''
        env = dict(os.environ, PYTHONPATH=str(root))
        with tempfile.TemporaryDirectory() as directory:
            result = subprocess.run([sys.executable, '-c', code], cwd=directory, env=env,
                                    capture_output=True, text=True, timeout=30)
        self.assertEqual(result.returncode, 0, result.stderr)

    def test_no_reverse_imports_in_sources(self):
        root = Path(__file__).resolve().parents[1]
        for name in ('logic_analyzer', 'set_devices', 'altera_logic'):
            for path in (root / name).rglob('*.py'):
                text = path.read_text(encoding='utf-8')
                self.assertNotIn('gui_desktop', text, str(path))