"""Tests for the prune logic — both rolling (pin_kind IS NULL) and the
auto-pin bucket (pin_kind='auto').

Design: docs/superpowers/specs/2026-05-13-note-version-pinning-design.md
"""
from unittest.mock import AsyncMock, MagicMock, patch


async def test_create_version_prune_sql_filters_to_unpinned():
    """The DELETE statement issued by create_version's prune step must
    include `pin_kind IS NULL` in the inner SELECT so pinned versions
    aren't counted toward MAX_VERSIONS and can't be pruned by it."""
    mock_session = AsyncMock()
    select_result = MagicMock()
    # No prior version → skips the throttle/dedupe early-return paths and
    # proceeds straight to insert + prune.
    select_result.scalars.return_value.first.return_value = None
    mock_session.add = MagicMock()
    mock_session.commit = AsyncMock()
    mock_session.refresh = AsyncMock()
    mock_session.__aenter__ = AsyncMock(return_value=mock_session)
    mock_session.__aexit__ = AsyncMock(return_value=False)

    captured_sql: list[str] = []

    async def execute_capture(stmt, *args, **kwargs):
        captured_sql.append(str(stmt))
        if len(captured_sql) == 1:
            return select_result
        return MagicMock()

    mock_session.execute = AsyncMock(side_effect=execute_capture)

    with patch(
        "fabledassistant.services.note_versions.async_session",
        return_value=mock_session,
    ):
        from fabledassistant.services.note_versions import create_version
        await create_version(
            user_id=1, note_id=42, body="content", title="t", tags=["a"],
        )

    assert any("pin_kind IS NULL" in s for s in captured_sql), (
        f"Expected prune SQL to filter pin_kind IS NULL; got: {captured_sql!r}"
    )