from math import sqrt
from build123d import *
from ocp_vscode import *

set_defaults(reset_camera=False)

lid_d = 212 * MM  # lid diameter
lid_t = 15 * MM  # lid edge thickness
gap = 2 * MM  # gap to allow easy insertion
lip = 15 * MM  # amount the holder folds back on itself
thickness = 3 * MM  # material thickness

with BuildPart() as holder:
    # Create the profile from a filleted line
    with BuildSketch() as profile:
        with BuildLine() as outline:
            Polyline(
                (0, 0),
                (lid_d / 2 + gap, 0),
                (lid_d / 2 + gap, lid_t + gap),
                (lid_d / 2 - lip, lid_t + gap),
            )
            fillet(outline.vertices(), radius=gap)
            offset(amount=thickness, side=Side.RIGHT)
        make_face()

    # Revolve 90° as the part is mirrored later
    revolve(axis=Axis.Y, revolution_arc=90)

    # Create a box to control the part of the revolution to keep
    size = holder.part.bounding_box().size
    with Locations((0, -thickness, -lid_d / 4)):
        Box(
            2 * size.X,
            size.Y,
            size.Y,
            mode=Mode.INTERSECT,
            align=(Align.CENTER, Align.MIN, Align.CENTER),
        )

    # Soften the sharp edges
    fillet(holder.edges().filter_by(Axis.Y).sort_by(Axis.X)[2:4], lip / 3)
    chamfer(holder.edges().filter_by_position(Axis.X, 1, size.X), 1 * MM)

    # Create the mounting screw hole
    with Locations(holder.faces().group_by(SortBy.AREA)[-1].sort_by(Axis.Y)[-1]):
        h = CounterSinkHole(3.8 * MM / 2, 7 * MM / 2)

    # Mirror to complete the part
    mirror(about=Plane.YZ)

    # Create a centered alignment notch to help with mounting
    min_z = holder.part.bounding_box().min.Z
    with Locations((0, -thickness, min_z)):
        Box(
            sqrt(2),
            thickness,
            sqrt(2),
            rotation=(0, 45, 0),
            align=(Align.CENTER, Align.MIN, Align.CENTER),
            mode=Mode.SUBTRACT,
        )

holder.part.export_step("holder-212.step")
print(f"Mounting holes spacing: {2*h.center().X:0.1f}mm")
show(holder)