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


ROOT = Path(__file__).resolve().parents[1]
SERVER_PATH = ROOT / "admin-web" / "server.py"


def load_server(tmpdir: Path):
    os.environ["GOTELEGRAM_BACKUP_DIR"] = str(tmpdir / "backups")
    os.environ["GOTELEGRAM_DIR"] = str(tmpdir / "gotelegram")
    module_name = "gotelegram_admin_server_test"
    sys.modules.pop(module_name, None)
    spec = importlib.util.spec_from_file_location(module_name, SERVER_PATH)
    module = importlib.util.module_from_spec(spec)
    assert spec.loader is not None
    spec.loader.exec_module(module)
    return module


class AdminFeatureTests(unittest.TestCase):
    def test_backup_path_accepts_only_local_archives(self):
        with tempfile.TemporaryDirectory() as raw:
            tmpdir = Path(raw)
            server = load_server(tmpdir)
            server.BACKUP_DIR.mkdir(parents=True)
            good = server.BACKUP_DIR / "gotelegram_backup_20260425_120000.tar.gz"
            good.write_text("backup", encoding="utf-8")
            encrypted = server.BACKUP_DIR / "gotelegram_backup_20260425_120001.tar.gz.enc"
            encrypted.write_text("backup", encoding="utf-8")
            legacy = server.BACKUP_DIR / "backup_20260425_120002.tar.gz"
            legacy.write_text("backup", encoding="utf-8")

            self.assertEqual(server.safe_backup_path(good.name), good.resolve())
            self.assertEqual(server.safe_backup_path(encrypted.name), encrypted.resolve())
            self.assertEqual(server.safe_backup_path(legacy.name), legacy.resolve())

            with self.assertRaises(ValueError):
                server.safe_backup_path("../outside.tar.gz")
            with self.assertRaises(ValueError):
                server.safe_backup_path("gotelegram_backup_20260425_120000.tar.gz.sha256")
            with self.assertRaises(FileNotFoundError):
                server.safe_backup_path("missing.tar.gz")

    def test_backup_schedule_calendar_rejects_unknown_values(self):
        with tempfile.TemporaryDirectory() as raw:
            server = load_server(Path(raw))
            self.assertEqual(server.backup_schedule_calendar("daily"), "*-*-* 03:20:00")
            self.assertEqual(server.backup_schedule_calendar("weekly"), "Sun 03:20:00")
            self.assertEqual(server.backup_schedule_calendar("monthly"), "*-*-01 03:20:00")
            self.assertIsNone(server.backup_schedule_calendar("off"))

            with self.assertRaises(ValueError):
                server.backup_schedule_calendar("hourly")


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