import importlib.util
import unittest
from pathlib import Path
from unittest.mock import patch

ROOT = Path(__file__).resolve().parents[3]
PATH = ROOT / "harness/agents/impl/skills/gitea-issue-implementation/scripts/delivery_adoption.py"
spec = importlib.util.spec_from_file_location("delivery_adoption", PATH)
mod = importlib.util.module_from_spec(spec)
spec.loader.exec_module(mod)


class DeliveryConsumerTests(unittest.TestCase):
    def test_delivery_requires_adoption_then_calls_adapter_once(self):
        calls = []
        with patch.object(mod, "require_adoption", return_value={"status": "pass"}) as adopted:
            result = mod.deliver(lambda: {"adapter": "actual"}, head="a" * 40,
                                 declaration={"mode": "delegated"})
        adopted.assert_called_once_with({"mode": "delegated"}, expected_source={"kind": "git_tree", "revision": "a" * 40}, expected_stage="implementation-delivery")
        self.assertEqual(result, {"adapter": "actual"})

    def test_rejected_adoption_blocks_adapter(self):
        calls = []
        with patch.object(mod, "require_adoption", side_effect=mod.AdoptionError("no")):
            with self.assertRaises(mod.AdoptionError):
                mod.deliver(lambda: calls.append("called"), head="a" * 40,
                            declaration={"mode": "delegated"})
        self.assertEqual(calls, [])

    def test_missing_declaration_blocks_adapter(self):
        calls = []
        with self.assertRaises(mod.AdoptionError):
            mod.deliver(lambda: calls.append("called"), head="a" * 40, declaration=None)
        self.assertEqual(calls, [])

    def test_explicit_none_still_validates_head_and_calls_adapter(self):
        calls = []
        with patch.object(mod, "require_adoption", return_value={"status": "none"}):
            with self.assertRaises(mod.AdoptionError):
                mod.deliver(lambda: calls.append("called"), head="bad", declaration={"mode": "none"})
            mod.deliver(lambda: calls.append("called"), head="a" * 40, declaration={"mode": "none"})
        self.assertEqual(calls, ["called"])


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