"""Behaviour of shared building geometry derived from EpcPropertyData —
reusable outside the SAP calculator (e.g. for Modelling cost quantities)."""

from datatypes.epc.domain.epc_property_data import BuildingPartIdentifier
from domain.building_geometry import (
    gross_heat_loss_wall_area,
    ground_floor_area,
    roof_area,
)
from tests.domain.sap10_calculator.worksheet._elmhurst_worksheet_000490 import (
    build_epc,
)


def test_gross_heat_loss_wall_area_sums_perimeter_times_height_per_storey() -> None:
    # Arrange
    # 000490 MAIN: floor 0 (perimeter 7.42 m x height 2.95 m) + floor 1
    # (7.42 m x 3.24 m) = 21.889 + 24.0408 = 45.93 m^2. Party walls are
    # excluded by construction (heat-loss perimeter, not total perimeter).
    epc = build_epc()

    # Act
    area: float = gross_heat_loss_wall_area(epc, BuildingPartIdentifier.MAIN)

    # Assert
    assert abs(area - 45.93) <= 0.01


def test_roof_area_is_the_parts_greatest_floor_area() -> None:
    # Arrange
    # RdSAP10 §3.8: roof area is the greatest of the floor areas on each
    # level. 000490 MAIN has two floors of 14.85 m^2, so the roof is 14.85.
    epc = build_epc()

    # Act
    area: float = roof_area(epc, BuildingPartIdentifier.MAIN)

    # Assert
    assert abs(area - 14.85) <= 0.01


def test_ground_floor_area_is_the_lowest_floors_area() -> None:
    # Arrange — 000490 MAIN floor 0 total area is 14.85 m^2
    epc = build_epc()

    # Act
    area: float = ground_floor_area(epc, BuildingPartIdentifier.MAIN)

    # Assert
    assert abs(area - 14.85) <= 0.01