# -*- coding: utf-8 -*-
"""Concrete of the cast piece that is not the panel rectangle.

A slab-seat ledge is modelled as its own family inside the assembly. It is
real concrete -- on WP371 it carried 8.99 ft3 = 1,349 lb, 7.5% of the piece
-- and leaving it out made the weight reconciliation accuse a correct model.
The lump rides at no station, so it is added to the geometric weight whole;
the statics rescale to the stated weight regardless, and this is what makes
that reconciliation honest.
"""
import pytest

from panellift import cli, section

from conftest import make_panel


LEDGE_FT3 = 8.992          # what WP371's LEDGE family actually measured
LEDGE_LB = LEDGE_FT3 * 150.0


def test_extra_cast_is_added_to_the_geometric_weight():
    """The ledge is weight whether or not it sits at a station."""
    bare = make_panel()
    ledged = make_panel()
    ledged.extra_cast_ft3 = LEDGE_FT3

    expected = section.geometric_weight_lb(bare) + LEDGE_LB
    assert section.geometric_weight_lb(ledged) == pytest.approx(expected)


def test_reconciliation_clears_when_the_ledge_is_counted():
    """A panel whose stated weight includes the ledge must not be accused."""
    panel = make_panel()
    panel.extra_cast_ft3 = LEDGE_FT3
    panel.weight_lb = section.geometric_weight_lb(panel)

    _geom, _stated, error = section.weight_reconciliation(panel)
    assert abs(error) < 0.001


def test_reconciliation_still_catches_a_missing_ledge():
    """Without the field, the old wrong answer is still visible.

    The ledge here is sized as a share of THIS panel -- on the smaller
    WP371 it was 7.5% of the piece, and check_weight warns past 5%.
    """
    panel = make_panel()
    ledge_ft3 = 0.075 * (panel.length_ft * panel.width_ft *
                         panel.thickness_ft)
    panel.weight_lb = (section.geometric_weight_lb(panel)
                       + ledge_ft3 * panel.unit_weight_pcf)

    _geom, _stated, error = section.weight_reconciliation(panel)
    assert error < -0.05                    # we are light by more than 5%


def test_cli_reads_extra_cast_ft3():
    """The job file carries the ledge, and the reader keeps it."""
    import json

    panel = make_panel()
    panel.extra_cast_ft3 = LEDGE_FT3
    data = json.loads(json.dumps({
        'mark': panel.mark,
        'length_ft': panel.length_ft,
        'width_ft': panel.width_ft,
        'thickness_in': panel.thickness_in,
        'unit_weight_pcf': panel.unit_weight_pcf,
        'extra_cast_ft3': LEDGE_FT3,
    }))

    assert cli.read_panel(data).extra_cast_ft3 == pytest.approx(LEDGE_FT3)


def test_cli_treats_a_missing_field_as_no_ledge():
    """Old job files without the key keep working, as zero."""
    import json

    data = json.loads(json.dumps({
        'mark': 'OLD-1',
        'length_ft': 32.0,
        'width_ft': 10.0,
        'thickness_in': 8.75,
    }))

    assert cli.read_panel(data).extra_cast_ft3 == 0.0