"""Fresh spare adoption restores a namespace through the daemon's real link stack."""

from pathlib import Path
import unittest

from harness import Albedo, exclusive
from inspect_support import Inspection
from kernel_support import editable_daemon


@exclusive
class KernelSpareTests(unittest.TestCase):
    def test_unused_spares_end_on_stop_and_owner_death(self):
        with Albedo(prepare=lambda app: app.env.update(ALBEDO_INSPECT="1")) as app:
            probe = Inspection(
                app, Path(__file__).with_name("albedo_kernel_spare_probe.erl")
            )
            self.assertTrue(probe.call_json("stop_json")["stopped"])

    def test_stale_spare_is_cleaned_before_cold_fallback(self):
        def prepare(app):
            launcher, app.bundle = editable_daemon(app.root)
            app.env.update(ALBEDO_INSPECT="1", ALBEDO_DAEMON=str(launcher))

        with Albedo(prepare=prepare) as app:
            session = app.session()
            probe = Inspection(
                app, Path(__file__).with_name("albedo_kernel_spare_probe.erl")
            )
            changed = app.bundle / "albedo_bundle.py"
            result = probe.call_json(
                "run_json", f'[<<"{session}">>, <<"{app.workspace}">>, <<"{changed}">>]'
            )
            self.assertEqual(result["recalled"]["status"], "ok", result)
            self.assertIn("SPARE_OK", result["recalled"]["output"])

    def test_spare_is_single_use_and_restores_definitions(self):
        with Albedo(prepare=lambda app: app.env.update(ALBEDO_INSPECT="1")) as app:
            session = app.session()
            probe = Inspection(
                app, Path(__file__).with_name("albedo_kernel_spare_probe.erl")
            )
            result = probe.call_json(
                "run_json", f'[<<"{session}">>, <<"{app.workspace}">>, <<>>]'
            )
            self.assertEqual(result["recalled"]["status"], "ok", result)
            self.assertIn("SPARE_OK", result["recalled"]["output"])
            self.assertEqual(result["live_work"], 0)