FabledScribe/tests/test_integration_rule_scope.py

"""Real-Postgres tests for WHERE a rule reaches.

A rule lives in a rulebook topic (global) or on one project. Retrieval that
ignores the home and searches every rule the user owns injects each project's
rules into every other project's sessions. What a mock cannot show is the
join doing the scoping: these seed real rules with hand-made vectors and stub
only the embedder, so every rule is an equally good match and the home alone
decides what comes back.
"""
import traceback
import uuid
from unittest.mock import AsyncMock, MagicMock, patch

import pytest
import pytest_asyncio

from scribe.models import async_session
from scribe.models.embedding import EMBEDDING_DIM, RuleEmbedding
from scribe.models.project import Project
from scribe.models.share import ProjectShare
from scribe.services import rulebooks as rulebooks_svc
from scribe.services.embeddings import CHUNKER_VERSION, EMBEDDING_MODEL, semantic_search_rules
from tests.helpers import ensure_user

pytestmark = [pytest.mark.integration, pytest.mark.usefixtures("_dispose_engine")]

QUERY_VEC = [1.0] + [0.0] * (EMBEDDING_DIM - 1)


@pytest_asyncio.fixture
async def homes():
    """One global rule, one rule on project A, one on project B, and a
    collaborator A is shared with. Every rule embeds identically to the query."""
    # Fresh users per test: every rule matches the query equally, so a rule
    # left by another test would be indistinguishable from a scoping leak.
    tag = uuid.uuid4().hex[:8]
    async with async_session() as s:
        owner = await ensure_user(s, f"rule_scope_owner_{tag}")
        collaborator = await ensure_user(s, f"rule_scope_collaborator_{tag}")
        a = Project(user_id=owner.id, title="Scope A")
        b = Project(user_id=owner.id, title="Scope B")
        s.add_all([a, b])
        await s.flush()
        s.add(ProjectShare(project_id=a.id, shared_with_user_id=collaborator.id,
                           permission="viewer", invited_by=owner.id))
        ids = {"owner": owner.id, "collaborator": collaborator.id, "a": a.id, "b": b.id}
        await s.commit()

    with patch("scribe.services.rulebooks._refresh_rule_embedding", MagicMock()):
        book = await rulebooks_svc.create_rulebook(ids["owner"], "Scope house style")
        topic = await rulebooks_svc.create_topic(book.id, ids["owner"], "everywhere")
        glob = await rulebooks_svc.create_rule(
            topic.id, ids["owner"], "Global scope rule", "Applies in every project.",
            when_to_apply="always",
        )
        on_a = await rulebooks_svc.create_project_rule(
            ids["a"], ids["owner"], "Project A rule", "Applies to A only.",
            when_to_apply="working on A",
        )
        on_b = await rulebooks_svc.create_project_rule(
            ids["b"], ids["owner"], "Project B rule", "Applies to B only.",
            when_to_apply="working on B",
        )

    async with async_session() as s:
        for rule in (glob, on_a, on_b):
            s.add(RuleEmbedding(
                rule_id=rule.id, chunk_index=0, embedding=QUERY_VEC,
                chunk_text=rule.title, chunker_version=CHUNKER_VERSION,
                embedding_model=EMBEDDING_MODEL,
            ))
        await s.commit()
    ids.update(glob=glob.id, on_a=on_a.id, on_b=on_b.id)
    return ids


async def _found(user_id: int, **scope) -> set[int]:
    """The rule ids a search finds — and a failure, not an empty set, when the
    search never ran. `semantic_search_rules` fails open (an exception becomes
    []), so without `report["searched"]` an error and a scoping miss read the
    same."""
    report: dict = {}
    raised: list[str] = []
    with patch("scribe.services.embeddings.get_embedding",
               AsyncMock(return_value=QUERY_VEC)), \
            patch("scribe.services.embeddings.logger") as log:
        # Called inside the except block, so the traceback is still current.
        log.warning.side_effect = lambda *_a, **_k: raised.append(traceback.format_exc())
        hits = await semantic_search_rules(user_id, "anything", limit=10,
                                           threshold=0.5, report=report, **scope)
    assert report.get("searched"), "the rule search did not run:\n" + "\n".join(raised)
    return {rule.id for _score, rule in hits}


async def test_retrieval_reaches_a_rule_only_from_its_home(homes):
    owner = homes["owner"]
    glob, on_a, on_b = homes["glob"], homes["on_a"], homes["on_b"]

    # A session bound to A: the global rule and A's own, never B's.
    assert await _found(owner, project_id=homes["a"]) == {glob, on_a}
    assert await _found(owner, project_id=homes["b"]) == {glob, on_b}

    # No bound project, and the default: global only. A caller that forgets
    # to pass a scope surfaces less, not another project's rules.
    assert await _found(owner) == {glob}

    # The explicit whole-rulebook question still reaches everything.
    assert await _found(owner, everywhere=True) == {glob, on_a, on_b}


async def test_a_shared_project_brings_its_rules_to_a_collaborator(homes):
    """Readability goes through access.can_read_project: a viewer on
    A gets A's rules. Not the owner's global rules — rulebooks are the
    owner's — and not B's, which is not shared."""
    collaborator = homes["collaborator"]
    assert await _found(collaborator, project_id=homes["a"]) == {homes["on_a"]}
    assert await _found(collaborator, project_id=homes["b"]) == set()


async def test_an_in_scope_rule_is_found_however_many_closer_rules_are_out_of_scope():
    """A search ordered through the HNSW index takes the ~40 nearest chunks
    from every owner, and filtering them AFTERWARDS loses a reader's own rule
    ranked past the 40th chunk overall. Here another
    user's 80 rules all sit nearer the query than the reader's one rule; the
    reader's search must still find it."""
    tag = uuid.uuid4().hex[:8]
    async with async_session() as s:
        reader = await ensure_user(s, f"rule_scope_reader_{tag}")
        crowd = await ensure_user(s, f"rule_scope_crowd_{tag}")
        await s.commit()
        reader_id, crowd_id = reader.id, crowd.id

    def near(i: int) -> list[float]:
        # Cosine ~0.9996 to the query, each distinct so the graph is a graph.
        vec = [1.0] + [0.0] * (EMBEDDING_DIM - 1)
        vec[1 + i] = 0.02
        return vec

    mine_vec = [0.8, 0.6] + [0.0] * (EMBEDDING_DIM - 2)   # cosine 0.8
    books = []
    try:
        with patch("scribe.services.rulebooks._refresh_rule_embedding", MagicMock()):
            book = await rulebooks_svc.create_rulebook(reader_id, "Reader's rules")
            books.append((book.id, reader_id))
            topic = await rulebooks_svc.create_topic(book.id, reader_id, "mine")
            mine = await rulebooks_svc.create_rule(
                topic.id, reader_id, "The reader's own rule", "Mine.", when_to_apply="always",
            )
            crowd_book = await rulebooks_svc.create_rulebook(crowd_id, "Someone else's rules")
            books.append((crowd_book.id, crowd_id))
            crowd_topic = await rulebooks_svc.create_topic(crowd_book.id, crowd_id, "theirs")
            theirs = [
                await rulebooks_svc.create_rule(
                    crowd_topic.id, crowd_id, f"Crowd rule {i}", "Not the reader's.",
                    when_to_apply="always",
                )
                for i in range(80)
            ]
        async with async_session() as s:
            s.add(RuleEmbedding(
                rule_id=mine.id, chunk_index=0, embedding=mine_vec, chunk_text=mine.title,
                chunker_version=CHUNKER_VERSION, embedding_model=EMBEDDING_MODEL,
            ))
            for i, rule in enumerate(theirs):
                s.add(RuleEmbedding(
                    rule_id=rule.id, chunk_index=0, embedding=near(i), chunk_text=rule.title,
                    chunker_version=CHUNKER_VERSION, embedding_model=EMBEDDING_MODEL,
                ))
            await s.commit()

        assert await _found(reader_id) == {mine.id}
        # And the crowd still finds its own, not the reader's.
        found = await _found(crowd_id)
        assert mine.id not in found and len(found) == 10
    finally:
        # These vectors sit right beside the query every other test here uses.
        for book_id, owner in books:
            await rulebooks_svc.delete_rulebook(book_id, owner)