from __future__ import annotations

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

from tools.exiftool import run_exiftool_command, run_exiftool_write
from tools.media_metadata import parse_exif_datetime
from tools.metadata_copy import copy_meaningful_metadata


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")

    def test_write_captures_success_output(self) -> None:
        with patch(
            "tools.exiftool.subprocess.run",
            return_value=subprocess.CompletedProcess([], 0, "1 image files updated\n", ""),
        ) as run:
            run_exiftool_write("exiftool", Path("photo.jpg"), ["-Artist=Test"])

        self.assertTrue(run.call_args.kwargs["capture_output"])
        self.assertTrue(run.call_args.kwargs["text"])

    def test_write_includes_exiftool_failure_output(self) -> None:
        with patch(
            "tools.exiftool.subprocess.run",
            return_value=subprocess.CompletedProcess([], 1, "", "Error renaming temporary file"),
        ):
            with self.assertRaisesRegex(RuntimeError, "Error renaming temporary file"):
                run_exiftool_write("exiftool", Path("photo.jpg"), ["-Artist=Test"])

    def test_metadata_copy_uses_exiftool_for_photos(self) -> None:
        with patch("tools.metadata_copy.run_exiftool_command") as run:
            copy_meaningful_metadata("exiftool", Path("source.jpg"), Path("target.jpg"))

        args = run.call_args.args[1]
        self.assertEqual(args[:4], ["-overwrite_original", "-TagsFromFile", "source.jpg", "-all:all"])
        self.assertEqual(args[-1], "target.jpg")

    def test_metadata_datetime_can_assume_utc(self) -> None:
        parsed = parse_exif_datetime("2026:07:04 14:13:36", assume_utc=True)
        self.assertEqual(str(parsed.tzinfo), "UTC")


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