"""Заходной скос отгибает балку, затем зуб возвращается за кромку. Форма прогиба задана для показа сборки; напряжения и ресурс требуют пробы."""

import FreeCAD  # noqa: F401 (initialize the CAD runtime first)

# isort: split
import math
import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
from common import Piece, Pose, box, join, main, params, phase, require, section

MODEL_ID = "cantilever"
DEFAULTS = {
    "beam_length": 28,
    "beam_width": 8,
    "beam_thickness": 1.6,
    "height": 12,
    "tooth_depth": 2,
    "deflection": 3,
    "clearance": 0.25,
}
NOTE = "Заходной скос отгибает балку, затем зуб возвращается за кромку. Форма прогиба задана для показа сборки; напряжения и ресурс требуют пробы."
MODE = "elastic"


def make_parts(supplied=None):

    p = params(DEFAULTS, supplied)
    l, w, b, h, d, f, c = [
        p[k]
        for k in (
            "beam_length",
            "beam_width",
            "beam_thickness",
            "height",
            "tooth_depth",
            "deflection",
            "clearance",
        )
    ]
    require(
        l > 12 and h > f + 4 and f > d and w > 3,
        "Beam needs working length and deflection clearance",
    )
    base = join(
        box(l - 3, -w / 2 - 4, 0, 15, w + 8, 3),
        box(l - 3, -w / 2 - 4, 3, 3, w + 8, h - d - c - 3),
        box(l + 9, -w / 2 - 4, 3, 3, w + 8, h + b + 6 - 3),
        box(l - 3, -w / 2 - 4, h + b + 5, 15, w + 8, 2),
    )

    def beam(t):
        bend = f * math.sin(math.pi * phase(t, 0.18, 0.86))
        lower = [(l * i / 8, h + bend * (i / 8) ** 2) for i in range(9)]
        outline = (
            lower
            + [(l, h - d + bend), (l + 4, h - d + bend), (l + 1, h + b + bend)]
            + [(l * i / 8, h + b + bend * (i / 8) ** 2) for i in range(8, -1, -1)]
        )
        return join(box(-4, -w / 2, 4, 4, w, h + b - 4), section(outline, -w / 2, w))

    return [
        Piece("receiver", "Ответная кромка", base),
        Piece(
            "latch",
            "Консольная защёлка",
            beam(1),
            lambda t: Pose(offset=(-18 * (1 - t), 0, 0)),
            deform=beam,
        ),
    ]


if __name__ == "__main__":
    main(make_parts, DEFAULTS, MODEL_ID, __file__, NOTE, MODE)