"""Tests for dynamic word ceiling scaling.

The standard generator's max_words used to be a fixed cap per tier; for a
600-word dense note dump on L3 it would compress to 140 words and silently
drop observations. ``_scale_max_words_for_notes_density`` exists to let the
cap stretch upwards when the inspector's bullets carry more content than
the baseline assumes.
"""

from __future__ import annotations

from app.generator.prompts import (
    _bullets_word_count,
    _scale_max_words_for_notes_density,
    _word_target_for_involvement,
)


def test_bullets_word_count_handles_empty() -> None:
    assert _bullets_word_count(None) == 0
    assert _bullets_word_count([]) == 0
    assert _bullets_word_count(["", "  "]) == 0


def test_bullets_word_count_sums_words() -> None:
    bullets = ["roof tiles slipped at south elevation", "rising damp at rear"]
    assert _bullets_word_count(bullets) == 10


def test_scale_max_words_no_growth_for_sparse_notes() -> None:
    assert _scale_max_words_for_notes_density(180, 40) == 180


def test_scale_max_words_grows_for_dense_notes() -> None:
    grown = _scale_max_words_for_notes_density(180, 600)
    assert grown > 180
    huge = _scale_max_words_for_notes_density(180, 3000)
    assert huge > grown


def test_scale_max_words_respects_absolute_ceiling() -> None:
    huge = _scale_max_words_for_notes_density(180, 50_000)
    assert huge <= 2400


def test_word_target_grows_with_bullets() -> None:
    sparse = _word_target_for_involvement(3, 50)
    dense = _word_target_for_involvement(
        3,
        50,
        bullets=["damp " * 400],
    )
    assert dense[1] >= sparse[1]