"""Две упругие лапки проходят отверстие и раскрываются под пакетом панелей. Зацепы доступны снизу для сжатия."""

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

# isort: split
import sys
from pathlib import Path

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

MODEL_ID = "split-pin"
DEFAULTS = {
    "panel_width": 28,
    "panel_thickness": 3,
    "hole_radius": 3.2,
    "head_radius": 5.5,
    "leg_width": 1.5,
    "tooth_radius": 4,
    "deflection": 1.4,
    "clearance": 0.3,
}
NOTE = "Две упругие лапки проходят отверстие и раскрываются под пакетом панелей. Зацепы доступны снизу для сжатия."
MODE = "elastic"


def make_parts(supplied=None):

    p = params(DEFAULTS, supplied)
    w, b, r, head, l, tooth, f, c = [
        p[k]
        for k in (
            "panel_width",
            "panel_thickness",
            "hole_radius",
            "head_radius",
            "leg_width",
            "tooth_radius",
            "deflection",
            "clearance",
        )
    ]
    require(
        head > r > l + 1 and tooth > r and f > tooth - r and w > 2 * head + 4,
        "Head and hooks must retain the panels",
    )
    lower = box(-w / 2, -w / 2, 6, w, w, b).cut(cyl(r, b + 2, (0, 0, 5)))
    upper = box(-w / 2, -w / 2, 6 + b + c, w, w, b).cut(
        cyl(r, b + 2, (0, 0, 5 + b + c))
    )
    z = 6 + 2 * b + 2 * c

    def pin(t):
        bend = f * phase(t, 0.15, 0.3) * (1 - phase(t, 0.99, 1))
        result = cyl(head, 2, (0, 0, z))
        for sign in (-1, 1):
            pts = [
                (1, z + 0.1),
                (1 + l, z + 0.1),
                (1 + l - bend, 5.7),
                (tooth - bend, 5.7),
                (1 + l - bend, 3.5),
                (1 - bend / 2, 3.5),
            ]
            result = join(result, section([(sign * x, zz) for x, zz in pts], -1.5, 3))
        return result

    return [
        Piece("lower", "Нижняя панель", lower),
        Piece("upper", "Верхняя панель", upper),
        Piece(
            "pin",
            "Разрезной штифт с зубьями",
            pin(1),
            lambda t: Pose(offset=(0, 0, 17 * (1 - t))),
            deform=pin,
        ),
    ]


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