"""访谈轮次「实质内容」启发式（阶段 LLM / 记忆检索门控）。"""

import pytest

from app.agents.chat import utterance_substance as us


@pytest.fixture
def heuristic_on(monkeypatch: pytest.MonkeyPatch) -> None:
    monkeypatch.setattr(
        "app.agents.chat.utterance_substance.settings.chat_substantive_heuristic_enabled",
        True,
    )
    monkeypatch.setattr(
        "app.agents.chat.utterance_substance.settings.chat_substantive_min_chars",
        12,
    )


def test_substantive_long_sentence(heuristic_on: None) -> None:
    assert us.should_run_chat_stage_memory_heavy_work(
        "我在下乡插队时住在生产队仓库里，印象最深的是冬天的早晨。"
    )


def test_non_substantive_ack(heuristic_on: None) -> None:
    assert not us.should_run_chat_stage_memory_heavy_work("嗯")
    assert not us.should_run_chat_stage_memory_heavy_work("对对")


def test_non_substantive_meta_process(heuristic_on: None) -> None:
    assert not us.should_run_chat_stage_memory_heavy_work("我回忆起了许多快忘的细节")


def test_five_char_short_substantive_not_skipped(heuristic_on: None) -> None:
    """五字短句未命中应答/元话语时不应被当成非实质（评审：旧 >=6 会误杀）。"""
    assert len("我进了工厂") == 5
    assert us.should_run_chat_stage_memory_heavy_work("我进了工厂")


def test_heuristic_disabled_always_true(monkeypatch: pytest.MonkeyPatch) -> None:
    monkeypatch.setattr(
        "app.agents.chat.utterance_substance.settings.chat_substantive_heuristic_enabled",
        False,
    )
    assert us.should_run_chat_stage_memory_heavy_work("嗯")