"""Stage 3a tests (#1965) — house-type catalog integrity + lookup.

Asserts the hardcoded ``HOUSE_TYPES`` catalog is well-formed (unique keys, sane
footprints, valid housing classes) and the lookup helpers behave (hit / miss).
"""

from __future__ import annotations

import pytest

from app.services.generative import catalog


def test_catalog_non_empty_and_keys_unique() -> None:
    assert len(catalog.HOUSE_TYPES) >= 4
    keys = [ht.section_type for ht in catalog.HOUSE_TYPES]
    assert len(keys) == len(set(keys)), "section_type keys must be unique"


def test_catalog_fields_are_sane() -> None:
    valid_classes = {"econom", "comfort", "business"}
    for ht in catalog.HOUSE_TYPES:
        assert ht.section_type and ht.section_type.isascii()
        assert ht.label_ru, "RU label must be present"
        assert ht.footprint_w_m > 0 and ht.footprint_d_m > 0
        assert 1 <= ht.default_floors <= 40
        assert ht.housing_class in valid_classes
        # footprint_sqm helper == w * d.
        assert ht.footprint_sqm == ht.footprint_w_m * ht.footprint_d_m


def test_catalog_covers_expected_formats() -> None:
    # Каталог должен покрывать основные форматы массового жилья РФ.
    keys = {ht.section_type for ht in catalog.HOUSE_TYPES}
    assert {"panel_econom", "monolith_comfort", "tower_business"} <= keys
    # Есть и высотный (>=20 этажей), и малоэтажный (<=4) формат.
    floors = [ht.default_floors for ht in catalog.HOUSE_TYPES]
    assert max(floors) >= 20
    assert min(floors) <= 4


def test_get_house_type_hit() -> None:
    ht = catalog.get_house_type("monolith_comfort")
    assert ht.section_type == "monolith_comfort"
    assert ht.housing_class == "comfort"


def test_get_house_type_miss_raises_keyerror() -> None:
    with pytest.raises(KeyError):
        catalog.get_house_type("does_not_exist")


def test_available_section_types_matches_catalog() -> None:
    assert catalog.available_section_types() == frozenset(
        ht.section_type for ht in catalog.HOUSE_TYPES
    )