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


_SCRIPT = Path(__file__).parents[1] / "scripts" / "preflight-deployment.py"
_SPEC = importlib.util.spec_from_file_location("deployment_preflight", _SCRIPT)
assert _SPEC is not None and _SPEC.loader is not None
preflight = importlib.util.module_from_spec(_SPEC)
sys.modules[_SPEC.name] = preflight
_SPEC.loader.exec_module(preflight)


class DeploymentPreflightTests(unittest.TestCase):
    def test_maps_nested_container_path_to_host_source(self):
        container = {
            "Mounts": [
                {"Type": "bind", "Source": "/srv/data", "Destination": "/data"},
                {"Type": "bind", "Source": "/srv/sync", "Destination": "/data/Sync"},
            ]
        }
        mapping = preflight.map_path(container, "/data/Sync/routes/route-1")
        self.assertEqual(mapping.source, Path("/srv/sync/routes/route-1"))
        self.assertEqual(str(mapping.destination), "/data/Sync")

    def test_rejects_api_and_client_roots_from_different_host_paths(self):
        with self.assertRaisesRegex(preflight.CheckFailure, "host paths differ"):
            preflight.require_same_path(
                "Syncthing api_root/local_root",
                preflight.Mapping(Path("/srv/syncthing-config/routes"), Path("/var/syncthing")),
                preflight.Mapping(Path("/srv/sync/routes"), Path("/data/storage")),
            )

    def test_rejects_unmounted_container_path(self):
        with self.assertRaisesRegex(preflight.CheckFailure, "not backed"):
            preflight.map_path({"Mounts": []}, "/missing")


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