from __future__ import annotations

import subprocess
import unittest
from pathlib import Path
from unittest.mock import patch

from tools.exiftool import run_exiftool_command


class ExiftoolInvocationTests(unittest.TestCase):
    def test_windows_uses_utf8_argument_file_for_unicode_paths(self) -> None:
        captured: dict[str, object] = {}

        def fake_run(command, **kwargs):
            captured["command"] = command
            argument_file = Path(kwargs["cwd"]) / command[-1]
            captured["contents"] = argument_file.read_text(encoding="utf-8")
            return subprocess.CompletedProcess(command, 0)

        with (
            patch("tools.exiftool._use_windows_argument_file", return_value=True),
            patch("tools.exiftool.subprocess.run", side_effect=fake_run),
        ):
            run_exiftool_command(
                "exiftool.exe",
                ["-j", "C:\\Photos\\M\u00e4rchen.jpg"],
                check=True,
            )

        self.assertEqual(
            captured["command"],
            ["exiftool.exe", "-charset", "filename=UTF8", "-@", "arguments.txt"],
        )
        self.assertEqual(captured["contents"], "-j\nC:\\Photos\\M\u00e4rchen.jpg\n")


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