feat: complete_instance no-op if already done

tests/test_completion.py

@@ -8,7 +8,11 @@ import re
 
 import pytest
 
-from custom_components.nestquest.completion import append_event, instance_state
+from custom_components.nestquest.completion import (
+    append_event,
+    complete_instance,
+    instance_state,
+)
 from custom_components.nestquest.dao_children import ChildrenDao
 from custom_components.nestquest.dao_instances import (
     EVENT_COMPLETED,
@@ -333,7 +337,7 @@ def test_module_never_exposes_update_or_delete() -> None:
     )
     assert "append_event" in public
     assert "instance_state" in public
-    assert "complete_instance" not in public
+    assert "complete_instance" in public
     assert "uncomplete_instance" not in public
     source = inspect.getsource(completion)
     assert "UPDATE" not in source
@@ -444,3 +448,147 @@ def test_instance_state_three_events_returns_done_and_preserves_rows(
         assert len(after) == 3
 
     _with_db(tmp_path, "state-three.db")(_body)
+
+
+# ---------------------------------------------------------------------------
+# complete_instance: append completed, no-op if already done
+# ---------------------------------------------------------------------------
+
+
+def test_complete_instance_appends_and_returns_done(tmp_path) -> None:
+    async def _body(database, child, instance):
+        events = CompletionEventsDao(database)
+        assert await events.list_by_instance(instance.id) == []
+        state = await complete_instance(
+            database,
+            instance.id,
+            actor_source="user",
+            actor_user_id="user-1",
+        )
+        assert state == "done"
+        assert await instance_state(database, instance.id) == "done"
+        rows = await events.list_by_instance(instance.id)
+        assert len(rows) == 1
+        assert rows[0].event_type == EVENT_COMPLETED
+        assert rows[0].actor_source == "user"
+        assert rows[0].actor_user_id == "user-1"
+        assert rows[0].was_on_time is True
+
+    _with_db(tmp_path, "complete-open.db")(_body)
+
+
+def test_complete_instance_already_done_is_noop(tmp_path) -> None:
+    async def _body(database, child, instance):
+        first = await complete_instance(
+            database,
+            instance.id,
+            actor_source="user",
+            actor_user_id="user-1",
+        )
+        events = CompletionEventsDao(database)
+        before = await events.list_by_instance(instance.id)
+        assert first == "done"
+        assert len(before) == 1
+        second = await complete_instance(
+            database,
+            instance.id,
+            actor_source="user",
+            actor_user_id="user-2",
+        )
+        after = await events.list_by_instance(instance.id)
+        assert second == "done"
+        assert after == before
+        assert after[0].actor_user_id == "user-1"
+
+    _with_db(tmp_path, "complete-noop.db")(_body)
+
+
+def test_complete_instance_unknown_instance_id_raises(tmp_path) -> None:
+    async def _body(database, child, instance):
+        with pytest.raises(ValueError, match="instance_id"):
+            await complete_instance(
+                database,
+                instance.id + 999,
+                actor_source="user",
+                actor_user_id="user-1",
+            )
+
+    _with_db(tmp_path, "complete-unknown.db")(_body)
+
+
+def test_complete_instance_rejects_non_integer_id() -> None:
+    async def _body():
+        with pytest.raises(ValueError, match="instance_id"):
+            await complete_instance(
+                object(),
+                "1",
+                actor_source="user",
+                actor_user_id="user-1",
+            )
+        with pytest.raises(ValueError, match="instance_id"):
+            await complete_instance(
+                object(),
+                True,
+                actor_source="user",
+                actor_user_id="user-1",
+            )
+
+    _run(_body())
+
+
+def test_complete_instance_after_uncompleted_appends(tmp_path) -> None:
+    async def _body(database, child, instance):
+        await append_event(
+            database,
+            instance.id,
+            child.id,
+            EVENT_COMPLETED,
+            actor_source="user",
+            actor_user_id="user-1",
+            was_on_time=True,
+        )
+        await append_event(
+            database,
+            instance.id,
+            child.id,
+            EVENT_UNCOMPLETED,
+            actor_source="user",
+            actor_user_id="user-1",
+        )
+        events = CompletionEventsDao(database)
+        before = await events.list_by_instance(instance.id)
+        assert await instance_state(database, instance.id) == "open"
+        state = await complete_instance(
+            database,
+            instance.id,
+            actor_source="panel",
+            actor_child_id=child.id,
+        )
+        assert state == "done"
+        after = await events.list_by_instance(instance.id)
+        assert len(after) == len(before) + 1
+        assert after[-1].event_type == EVENT_COMPLETED
+        assert after[-1].actor_source == "panel"
+        assert after[-1].was_on_time is True
+
+    _with_db(tmp_path, "complete-reopen.db")(_body)
+
+
+def test_complete_instance_now_pins_occurred_at(tmp_path) -> None:
+    async def _body(database, child, instance):
+        pinned = datetime.datetime(
+            2026, 9, 18, 8, 0, 0, tzinfo=datetime.timezone.utc
+        )
+        await complete_instance(
+            database,
+            instance.id,
+            actor_source="user",
+            actor_user_id="user-1",
+            now=pinned,
+        )
+        rows = await CompletionEventsDao(database).list_by_instance(
+            instance.id
+        )
+        assert rows[0].occurred_at == "2026-09-18T08:00:00+00:00"
+
+    _with_db(tmp_path, "complete-pinned.db")(_body)