import importlib.util
import subprocess
import sys
import tempfile
import types
import unittest
import zipfile
from pathlib import Path
from unittest.mock import patch

from openpyxl import Workbook

ROOT = Path(__file__).resolve().parents[2]
COMMON = ROOT / "config/skill-overrides/common"


def load_module(name):
    spec = importlib.util.spec_from_file_location(name, COMMON / f"{name}.py")
    module = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(module)
    return module


def load_recalc():
    office = types.ModuleType("office.soffice")
    office.run_soffice = lambda *args, **kwargs: None
    spec = importlib.util.spec_from_file_location("market_recalc", ROOT / "config/skill-overrides/xlsx/recalc.py")
    module = importlib.util.module_from_spec(spec)
    with patch.dict(sys.modules, {"office.soffice": office}):
        spec.loader.exec_module(module)
    return module


class OfficePortabilityTests(unittest.TestCase):
    def test_windows_install_path_and_arguments_with_spaces(self):
        office = load_module("soffice")
        with tempfile.TemporaryDirectory() as temporary:
            program_files = Path(temporary) / "Program Files"
            executable = program_files / "LibreOffice/program/soffice.com"
            executable.parent.mkdir(parents=True)
            executable.touch()
            with patch.object(office.platform, "system", return_value="Windows"), \
                    patch.object(office.shutil, "which", return_value=None), \
                    patch.dict(office.os.environ, {"ProgramFiles": str(program_files)}, clear=True), \
                    patch.object(office.subprocess, "run", return_value=subprocess.CompletedProcess([], 0)) as run:
                office.run_soffice(["--headless", "--convert-to", "pdf", "中文 文件.docx"])
                args, kwargs = run.call_args
                self.assertEqual(args[0][0], str(executable))
                self.assertEqual(args[0][-1], "中文 文件.docx")
                self.assertTrue(args[0][1].startswith("-env:UserInstallation=file:"))
                self.assertNotIn("LD_PRELOAD", kwargs["env"])

    def test_existing_profile_is_preserved(self):
        office = load_module("soffice")
        with patch.object(office, "resolve_soffice_binary", return_value="soffice"), \
                patch.object(office.subprocess, "run", return_value=subprocess.CompletedProcess([], 0)) as run:
            office.run_soffice(["-env:UserInstallation=file:///profile", "--headless"])
            self.assertEqual(run.call_args.args[0], ["soffice", "-env:UserInstallation=file:///profile", "--headless"])

    def test_package_roundtrip_and_removed_parts(self):
        package = load_module("office_package")
        with tempfile.TemporaryDirectory() as temporary:
            root = Path(temporary)
            source = root / "中文 输入.docx"
            with zipfile.ZipFile(source, "w") as archive:
                archive.writestr("[Content_Types].xml", "<Types/>")
                archive.writestr("word/document.xml", "<正文/>")
                archive.writestr("word/removed.xml", "<remove/>")
            extracted = root / "解包"
            package.unpack(source, extracted)
            (extracted / "word/removed.xml").unlink()
            output = root / "中文 输出.docx"
            package.pack(extracted, output)
            with zipfile.ZipFile(output) as archive:
                self.assertNotIn("word/removed.xml", archive.namelist())
                self.assertEqual(archive.read("word/document.xml").decode(), "<正文/>")

    def test_package_rejects_path_escape(self):
        package = load_module("office_package")
        with tempfile.TemporaryDirectory() as temporary:
            root = Path(temporary)
            source = root / "bad.docx"
            with zipfile.ZipFile(source, "w") as archive:
                archive.writestr("../escape.txt", "bad")
            with self.assertRaisesRegex(ValueError, "Unsafe ZIP entry"):
                package.unpack(source, root / "unpacked")
            self.assertFalse((root / "escape.txt").exists())

    def test_formula_without_cache_is_not_success(self):
        recalc = load_recalc()
        with tempfile.TemporaryDirectory() as temporary:
            source = Path(temporary) / "中文.xlsx"
            workbook = Workbook()
            workbook.active["A1"] = "=1+1"
            workbook.save(source)
            formulas, errors = recalc.inspect_workbook(source)
            self.assertEqual(formulas, {"Sheet!A1"})
            self.assertEqual(errors, {"MISSING_FORMULA_CACHE": ["Sheet!A1"]})

    def test_recalc_timeout_preserves_original(self):
        recalc = load_recalc()
        with tempfile.TemporaryDirectory() as temporary:
            source = Path(temporary) / "中文.xlsx"
            Workbook().save(source)
            before = source.read_bytes()
            with patch.object(recalc, "run_soffice", side_effect=subprocess.TimeoutExpired("soffice", 1)):
                report = recalc.recalc(source, 1)
            self.assertIn("error", report)
            self.assertEqual(source.read_bytes(), before)

    def test_recalc_external_links_refused_without_conversion(self):
        recalc = load_recalc()
        with tempfile.TemporaryDirectory() as temporary:
            source = Path(temporary) / "linked.xlsx"
            with zipfile.ZipFile(source, "w") as archive:
                archive.writestr("xl/externalLinks/externalLink1.xml", "<externalLink/>")
            before = source.read_bytes()
            with patch.object(recalc, "run_soffice") as convert:
                report = recalc.recalc(source)
            self.assertIn("error", report)
            convert.assert_not_called()
            self.assertEqual(source.read_bytes(), before)


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