import importlib.util
import tempfile
import unittest
from pathlib import Path


MODULE_PATH = Path("updater_gui.py")
SPEC = importlib.util.spec_from_file_location("updater_gui_under_test", MODULE_PATH)
updater_gui = importlib.util.module_from_spec(SPEC)
SPEC.loader.exec_module(updater_gui)


class UpdaterGuiTests(unittest.TestCase):
    def test_read_version_marker(self):
        with tempfile.TemporaryDirectory() as tmp_dir:
            marker = Path(tmp_dir) / "version.txt"
            marker.write_text("2.0.1\n", encoding="utf-8")
            value = updater_gui._read_version_marker(tmp_dir)
            self.assertEqual(value, "2.0.1")

    def test_mirror_tree_skips_selected_file(self):
        with tempfile.TemporaryDirectory() as src_tmp, tempfile.TemporaryDirectory() as dst_tmp:
            src = Path(src_tmp)
            dst = Path(dst_tmp)
            (src / "keep.txt").write_text("ok", encoding="utf-8")
            (src / "skip.bin").write_text("x", encoding="utf-8")
            (src / "sub").mkdir()
            (src / "sub" / "nested.txt").write_text("nested", encoding="utf-8")

            updater_gui._mirror_tree(str(src), str(dst), skip_names={"skip.bin"})

            self.assertTrue((dst / "keep.txt").exists())
            self.assertTrue((dst / "sub" / "nested.txt").exists())
            self.assertFalse((dst / "skip.bin").exists())


if __name__ == "__main__":
    unittest.main()