"""The shape ledger judging against family ideas, without a database
(milestone 463 step 5).

Pinned here: what a project's shapes say about an idea, when an answer
contradicts them, which reference a shape in a given language is judged
against, and the family arm's rule — measured on 2026-10-06 (#4991), and
replayed below as the table it was chosen from. The two ledgers moving
together against Postgres are in tests/test_integration_family_adoption.py.
"""
from __future__ import annotations

from types import SimpleNamespace
from unittest.mock import AsyncMock, patch

import pytest

from scribe.services.family_adoption import (
    _contradiction, path_speaks, shape_outcome, shapes_say,
)
from scribe.services.shape_ledger import _FAMILY_FLOOR, _semantic_canon, pick_semantic
from tests.helpers import tool_doc


def _shape(status: str, symbol: str = "f", reason: str = "", snippet_id: int = 7):
    return SimpleNamespace(id=1, path=f"src/{symbol}.py", symbol=symbol, status=status,
                           reason=reason, snippet_id=snippet_id)


# --- what the shapes say ---------------------------------------------------------

@pytest.mark.parametrize("statuses,expected", [
    (["instance"], "adopted"),
    (["canonical"], "adopted"),
    (["variant", "instance"], "adopted"),
    (["variant"], "variant"),
    ([], None),
])
def test_shape_outcome(statuses, expected):
    assert shape_outcome(statuses) == expected


def test_no_shape_is_silence_not_owed():
    assert shapes_say([]) is None


def test_an_adopted_reason_is_fixed_text_so_another_instance_logs_nothing():
    one = shapes_say([_shape("instance", "a")])
    two = shapes_say([_shape("instance", "a"), _shape("instance", "b")])
    assert one["reason"] == two["reason"]
    assert two["evidence"] == ["src/a.py::a", "src/b.py::b"]


def test_a_variant_carries_the_shapes_why_and_only_variants_are_its_evidence():
    said = shapes_say([_shape("variant", "k", reason="a kiosk installs it")])
    assert said["outcome"] == "variant" and "a kiosk installs it" in said["reason"]
    mixed = shapes_say([_shape("variant", "k", reason="x"), _shape("instance", "i")])
    assert mixed["outcome"] == "adopted" and mixed["evidence"] == ["src/i.py::i"]


# --- the two ledgers never disagree -----------------------------------------------

def test_an_answer_the_shapes_contradict_names_them_and_the_way_out():
    said = shapes_say([_shape("instance", "a")])
    refused = _contradiction("owed", said, idea_id=5)
    assert "src/a.py::a" in refused and "classify_shapes" in refused and "#5" in refused


@pytest.mark.parametrize("outcome,said", [
    ("adopted", shapes_say([_shape("instance")])),
    ("owed", None),
    ("exempt", None),
])
def test_an_agreeing_answer_or_silent_shapes_refuse_nothing(outcome, said):
    assert _contradiction(outcome, said, idea_id=5) is None


# --- which reference a shape is judged against --------------------------------------

@pytest.mark.parametrize("path,language,expected", [
    ("tools/release.py", "python", True),
    ("app/Updater.kt", "kotlin", True),
    ("cmd/main.go", "go", True),
    ("cmd/main.go", "kotlin", False),
    ("web/App.vue", "vue", True),
    ("README", "python", False),
    ("x.py", "", False),
])
def test_path_speaks(path, language, expected):
    assert path_speaks(path, language) is expected


# --- the family arm, and the measurement it was chosen from -----------------------

OWN, REF, OTHER = 1, 2, 3


@pytest.mark.parametrize("name,hits,expected", [
    # #4991's pairs, the reference as REF and the best other hit as OTHER.
    ("A py->go", [(0.728, REF), (0.703, OTHER)], "family"),
    ("B py->go", [(0.715, REF), (0.675, OTHER)], "family"),
    ("D kt->kt", [(0.816, REF), (0.734, OTHER)], "family"),
    ("E go->go", [(0.610, REF), (0.604, OTHER)], None),
    # No reference exists: the best hit is unrelated, the reference trails.
    ("N4", [(0.715, OTHER), (0.706, REF)], None),
    ("N1", [(0.666, OTHER)], None),
])
def test_the_family_arm_replays_its_measurement(name, hits, expected):
    found = pick_semantic(hits, allowed=set(), family={REF}, floor=0.68)
    assert (found[2] if found else None) == expected, name


def test_a_family_reference_must_be_the_top_hit_not_merely_the_first_allowed():
    assert pick_semantic([(0.80, OTHER), (0.79, REF)], set(), {REF}, floor=0.68) is None


def test_the_own_project_arm_still_looks_past_disallowed_hits():
    assert pick_semantic([(0.80, OTHER), (0.70, OWN)], {OWN}, {REF}, floor=0.68) == (
        OWN, 0.7, "semantic")


def test_the_family_floor_sits_between_the_bands_it_was_measured_on():
    assert 0.610 < _FAMILY_FLOOR <= 0.715


async def test_a_project_on_a_shared_platform_is_searched_with_no_own_canon():
    """The own-project allowed set is often empty (the language gate); the
    family references alone are reason to search."""
    body = "def throttle(key: str) -> bool:\n    return attempts[key] < LIMIT and not locked(key)\n"
    hit = SimpleNamespace(id=REF)
    with patch("scribe.services.embeddings.semantic_search_notes",
               AsyncMock(return_value=[(0.72, hit)])):
        assert await _semantic_canon(1, body, set(), {REF}) == (REF, 0.72, "family")


# --- the agent-facing contract -----------------------------------------------------

def test_the_tools_teach_idea_id_and_the_family_basis():
    classify = tool_doc("scribe.mcp.tools.shapes", "classify_shapes")
    assert "idea_id" in classify and "shapes contradict" in classify
    assert "family" in tool_doc("scribe.mcp.tools.shapes", "list_shapes")
    assert '"family"' in tool_doc("scribe.mcp.tools.shapes", "confirm_shape_proposals")
    assert "classify_shapes" in tool_doc("scribe.mcp.tools.family", "assess_family_adoption")