chatbot_v3/tests/support/point_contract.py

"""One behavioural contract, run against both `PointRepository` implementations.

Plan 002 Phase 1's exit criterion is that the Qdrant adapter and the in-memory
fake agree on filtering, ordering, and pagination. Asserting that by writing two
parallel test files invites them to drift — the usual outcome is a fake that
quietly grows more forgiving than the real store, so unit tests keep passing
while production does something else.

So the scenarios live here once. `tests/unit/application/points/` runs them
against `FakePointRepository`; `tests/integration/qdrant/` runs the identical
functions against real Qdrant. A divergence fails one of the two runs rather
than hiding.

Each scenario takes an already-seeded repository plus the ids it was seeded
with, so seeding (which genuinely differs — one writes a dict, the other upserts
vectors) stays outside the shared code.
"""

import uuid
from dataclasses import dataclass
from datetime import UTC, datetime

from src.application.ingestion.chunking import chunk_id_for
from src.application.points.point import Point
from src.application.ports.point_repository import PayloadPatch, PointRepository

# Two tenants and two files, so every scenario can assert both that the right
# rows come back and that the wrong ones do not.
SEEDED_AT = datetime(2026, 1, 1, 12, 0, tzinfo=UTC)


@dataclass(frozen=True)
class SeedSpec:
    """One point to seed. Deliberately flat — the fixture builds the model."""

    tenant_id: uuid.UUID
    file_id: uuid.UUID
    chunk_index: int
    content: str
    order_id: float
    is_active: bool = True
    version: int = 1
    domain: str = "support"


def point_id_for(file_id: uuid.UUID, chunk_index: int) -> uuid.UUID:
    """The deterministic point id (ADR-0001), re-exported for readability."""
    return chunk_id_for(file_id, chunk_index)


def build_point(spec: SeedSpec) -> Point:
    point_id = point_id_for(spec.file_id, spec.chunk_index)
    return Point(
        point_id=point_id,
        tenant_id=spec.tenant_id,
        domain=spec.domain,
        file_id=spec.file_id,
        chunk_id=point_id,
        content=spec.content,
        content_type="paragraph",
        source_filename="handbook.docx",
        source_type="docx",
        order_id=spec.order_id,
        chunk_index=spec.chunk_index,
        previous_chunk_id=None,
        next_chunk_id=None,
        is_active=spec.is_active,
        deleted_at=None if spec.is_active else SEEDED_AT,
        created_at=SEEDED_AT,
        updated_at=SEEDED_AT,
        created_by="ingestion",
        updated_by="ingestion",
        version=spec.version,
        content_hash="0" * 64,
        embedding_model_version="test-model",
    )


def seed_specs(
    tenant_a: uuid.UUID,
    tenant_b: uuid.UUID,
    file_a: uuid.UUID,
    file_b: uuid.UUID,
    file_c: uuid.UUID,
) -> tuple[SeedSpec, ...]:
    """The fixed corpus every scenario below assumes.

    Ordering is deliberately not insertion order: `order_id` 3.0 is seeded
    before 2.0 so a repository that returns rows in write order fails
    `scenario_list_orders_by_order_id` instead of passing by accident.

    Tenant B owns its own file. Sharing a `file_id` across tenants would be a
    fixture that cannot occur: point ids are derived from `file_id` plus
    `chunk_index` alone, so two tenants in one file would collide on a single
    id and the corpus would be testing an impossible state.
    """
    return (
        SeedSpec(tenant_a, file_a, 0, "onboarding checklist for new staff", 1.0),
        SeedSpec(tenant_a, file_a, 2, "payroll schedule and bank details", 3.0),
        SeedSpec(tenant_a, file_a, 1, "expense policy and receipts", 2.0),
        SeedSpec(tenant_a, file_a, 3, "retired parking policy", 4.0, is_active=False),
        SeedSpec(tenant_a, file_b, 0, "supplier onboarding contacts", 1.0, domain="ops"),
        SeedSpec(tenant_b, file_c, 0, "other tenant onboarding secrets", 1.0),
    )


async def scenario_get_returns_point_within_tenant(
    repository: PointRepository, *, tenant_a: uuid.UUID, file_a: uuid.UUID
) -> None:
    point = await repository.get(tenant_id=tenant_a, point_id=point_id_for(file_a, 0))
    assert point is not None
    assert point.content == "onboarding checklist for new staff"
    assert point.chunk_index == 0
    assert point.order_id == 1.0


async def scenario_get_hides_other_tenants_point(
    repository: PointRepository, *, tenant_b: uuid.UUID, file_a: uuid.UUID
) -> None:
    """Tenant B probing a real point id that belongs to tenant A gets nothing.

    The point exists, so this distinguishes a tenant filter from a plain
    existence check — the difference between `404` and a leak.
    """
    assert await repository.get(tenant_id=tenant_b, point_id=point_id_for(file_a, 0)) is None


async def scenario_get_reaches_inactive_points(
    repository: PointRepository, *, tenant_a: uuid.UUID, file_a: uuid.UUID
) -> None:
    """A direct `get` is not subject to the implied `is_active` read filter.

    Soft delete and relinking both address points by id and must be able to see
    a deactivated one; only listings hide them.
    """
    point = await repository.get(tenant_id=tenant_a, point_id=point_id_for(file_a, 3))
    assert point is not None
    assert point.is_active is False


async def scenario_get_many_returns_only_this_tenants_points(
    repository: PointRepository, *, tenant_a: uuid.UUID, file_a: uuid.UUID
) -> None:
    found = await repository.get_many(
        tenant_id=tenant_a,
        point_ids=[point_id_for(file_a, 0), point_id_for(file_a, 1), uuid.uuid4()],
    )
    assert {point.chunk_index for point in found} == {0, 1}


async def scenario_list_orders_by_order_id(
    repository: PointRepository, *, tenant_a: uuid.UUID, file_a: uuid.UUID
) -> None:
    page = await repository.list_by_file(tenant_id=tenant_a, file_id=file_a, limit=10)
    assert [point.order_id for point in page.points] == [1.0, 2.0, 3.0]
    assert page.next_cursor is None


async def scenario_list_excludes_inactive_by_default(
    repository: PointRepository, *, tenant_a: uuid.UUID, file_a: uuid.UUID
) -> None:
    default = await repository.list_by_file(tenant_id=tenant_a, file_id=file_a, limit=10)
    assert 4.0 not in [point.order_id for point in default.points]

    opted_in = await repository.list_by_file(
        tenant_id=tenant_a, file_id=file_a, limit=10, include_inactive=True
    )
    assert [point.order_id for point in opted_in.points] == [1.0, 2.0, 3.0, 4.0]


async def scenario_list_paginates_without_skipping_or_repeating(
    repository: PointRepository, *, tenant_a: uuid.UUID, file_a: uuid.UUID
) -> None:
    first = await repository.list_by_file(tenant_id=tenant_a, file_id=file_a, limit=2)
    assert [point.order_id for point in first.points] == [1.0, 2.0]
    assert first.next_cursor is not None

    second = await repository.list_by_file(
        tenant_id=tenant_a, file_id=file_a, limit=2, cursor=first.next_cursor
    )
    assert [point.order_id for point in second.points] == [3.0]
    assert second.next_cursor is None


async def scenario_list_is_scoped_to_one_file(
    repository: PointRepository, *, tenant_a: uuid.UUID, file_b: uuid.UUID
) -> None:
    page = await repository.list_by_file(tenant_id=tenant_a, file_id=file_b, limit=10)
    assert [point.content for point in page.points] == ["supplier onboarding contacts"]


async def scenario_count_respects_tenant_and_filters(
    repository: PointRepository,
    *,
    tenant_a: uuid.UUID,
    tenant_b: uuid.UUID,
    file_a: uuid.UUID,
) -> None:
    assert await repository.count(tenant_id=tenant_a) == 4
    assert await repository.count(tenant_id=tenant_a, include_inactive=True) == 5
    assert await repository.count(tenant_id=tenant_a, file_id=file_a) == 3
    assert await repository.count(tenant_id=tenant_a, domain="ops") == 1
    assert await repository.count(tenant_id=tenant_b) == 1


async def scenario_keyword_search_matches_content_within_tenant(
    repository: PointRepository, *, tenant_a: uuid.UUID, tenant_b: uuid.UUID
) -> None:
    found = await repository.keyword_search(tenant_id=tenant_a, query="onboarding", limit=10)
    assert {point.content for point in found.points} == {
        "onboarding checklist for new staff",
        "supplier onboarding contacts",
    }

    # The same term matches a different tenant's point, which must not leak.
    other = await repository.keyword_search(tenant_id=tenant_b, query="onboarding", limit=10)
    assert {point.content for point in other.points} == {"other tenant onboarding secrets"}


async def scenario_keyword_search_excludes_inactive_by_default(
    repository: PointRepository, *, tenant_a: uuid.UUID
) -> None:
    """ "retired parking policy" is seeded inactive, so only the opt-in sees it."""
    default = await repository.keyword_search(tenant_id=tenant_a, query="parking", limit=10)
    assert default.points == ()

    opted_in = await repository.keyword_search(
        tenant_id=tenant_a, query="parking", limit=10, include_inactive=True
    )
    assert {point.content for point in opted_in.points} == {"retired parking policy"}


async def scenario_keyword_search_filters_by_domain(
    repository: PointRepository, *, tenant_a: uuid.UUID
) -> None:
    found = await repository.keyword_search(
        tenant_id=tenant_a, query="onboarding", limit=10, domain="ops"
    )
    assert {point.content for point in found.points} == {"supplier onboarding contacts"}


async def scenario_patch_applies_when_version_matches(
    repository: PointRepository, *, tenant_a: uuid.UUID, file_a: uuid.UUID
) -> None:
    target = point_id_for(file_a, 0)
    await repository.apply_patches(
        tenant_id=tenant_a,
        patches=[
            PayloadPatch(
                point_id=target,
                payload={"content": "amended onboarding checklist", "version": 2},
                expected_version=1,
            )
        ],
    )
    point = await repository.get(tenant_id=tenant_a, point_id=target)
    assert point is not None
    assert point.content == "amended onboarding checklist"
    assert point.version == 2


async def scenario_patch_is_a_noop_when_version_is_stale(
    repository: PointRepository, *, tenant_a: uuid.UUID, file_a: uuid.UUID
) -> None:
    """A stale guard must match nothing rather than raise or clobber.

    This is the behaviour the service's post-apply check depends on: Qdrant
    reports success for a filtered `set_payload` that matched zero points, so
    "did my write land?" is only answerable by reading back.
    """
    target = point_id_for(file_a, 1)
    await repository.apply_patches(
        tenant_id=tenant_a,
        patches=[
            PayloadPatch(
                point_id=target,
                payload={"content": "should not land"},
                expected_version=99,
            )
        ],
    )
    point = await repository.get(tenant_id=tenant_a, point_id=target)
    assert point is not None
    assert point.content == "expense policy and receipts"


async def scenario_patch_cannot_cross_tenants(
    repository: PointRepository, *, tenant_a: uuid.UUID, tenant_b: uuid.UUID, file_a: uuid.UUID
) -> None:
    """Tenant B patching tenant A's point id must change nothing.

    An unguarded patch (no `expected_version`) addressed by a known-good id is
    the sharpest form of the probe: only the tenant condition can stop it, so a
    repository that filtered on id alone would rewrite another tenant's row.
    """
    target = point_id_for(file_a, 0)
    await repository.apply_patches(
        tenant_id=tenant_b,
        patches=[PayloadPatch(point_id=target, payload={"content": "hijacked"})],
    )
    victim = await repository.get(tenant_id=tenant_a, point_id=target)
    assert victim is not None
    assert victim.content == "onboarding checklist for new staff"


# Scenarios that only read, safe to run in any order against one seeded corpus.
READ_SCENARIOS = (
    scenario_get_returns_point_within_tenant,
    scenario_get_hides_other_tenants_point,
    scenario_get_reaches_inactive_points,
    scenario_get_many_returns_only_this_tenants_points,
    scenario_list_orders_by_order_id,
    scenario_list_excludes_inactive_by_default,
    scenario_list_paginates_without_skipping_or_repeating,
    scenario_list_is_scoped_to_one_file,
    scenario_count_respects_tenant_and_filters,
    scenario_keyword_search_matches_content_within_tenant,
    scenario_keyword_search_excludes_inactive_by_default,
    scenario_keyword_search_filters_by_domain,
)

# Scenarios that mutate, and therefore need a freshly seeded corpus each.
WRITE_SCENARIOS = (
    scenario_patch_applies_when_version_matches,
    scenario_patch_is_a_noop_when_version_is_stale,
    scenario_patch_cannot_cross_tenants,
)