"""Exercise the real CMake resource functions without requiring a Qt configure."""
from pathlib import Path
import os
import re
import subprocess
import tempfile
import unittest
import xml.etree.ElementTree as ET

ROOT = Path(__file__).resolve().parents[1]
SOURCE = ROOT / "freecad-source/cMake/FreeCAD_Helpers/SetupQt.cmake"


class TranslationResourceStability(unittest.TestCase):
    def test_content_changes_update_resources_but_reconfigure_preserves_timestamps(self):
        source = SOURCE.read_text()
        for name, prefix in (("qt_create_resource_file", "translations/"), ("qt_create_resource_file_prefix", "")):
            with self.subTest(name=name), tempfile.TemporaryDirectory(prefix="freecad-qrc-") as temporary:
                directory = Path(temporary)
                body = re.search(rf"function\({name} outfile\).*?endfunction\(\)", source, re.S)
                self.assertIsNotNone(body)
                script = directory / "test.cmake"
                output = directory / "with spaces" / "translations.qrc"
                def run(files):
                    arguments = " ".join(f'"/inputs/{value}"' for value in files)
                    script.write_text(f'{body.group()}\n{name}("{output.as_posix()}" {arguments})\n')
                    subprocess.run(["cmake", "-P", str(script)], check=True, capture_output=True, text=True, timeout=10)
                run(["Base_en.qm", "Base_zh_CN.qm"])
                expected = output.read_bytes()
                os.utime(output, ns=(1_600_000_000_000_000_000, 1_600_000_000_000_000_000))
                first_mtime = output.stat().st_mtime_ns
                run(["Base_en.qm", "Base_zh_CN.qm"])
                self.assertEqual(output.read_bytes(), expected)
                self.assertEqual(output.stat().st_mtime_ns, first_mtime)
                resource = ET.fromstring(expected).find("qresource")
                self.assertEqual([item.text for item in resource], [prefix + "Base_en.qm", prefix + "Base_zh_CN.qm"])
                self.assertEqual(resource.get("prefix"), "/translations" if not prefix else None)
                run(["Base_zh_CN.qm", "Base_fr.qm"])
                self.assertNotEqual(output.stat().st_mtime_ns, first_mtime)
                self.assertEqual([item.text for item in ET.fromstring(output.read_bytes()).find("qresource")], [prefix + "Base_zh_CN.qm", prefix + "Base_fr.qm"])
                run([])
                self.assertEqual(list(ET.fromstring(output.read_bytes()).find("qresource")), [])


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