#!/usr/bin/env python3
# type: ignore

#**************************************************************************
#   Copyright (C) 2025, Paul Lutus                                        *
#                                                                         *
#   This program is free software; you can redistribute it and/or modify  *
#   it under the terms of the GNU General Public License as published by  *
#   the Free Software Foundation; either version 2 of the License, or     *
#   (at your option) any later version.                                   *
#                                                                         *
#   This program is distributed in the hope that it will be useful,       *
#   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
#   GNU General Public License for more details.                          *
#                                                                         *
#   You should have received a copy of the GNU General Public License     *
#   along with this program; if not, write to the                         *
#   Free Software Foundation, Inc.,                                       *
#   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
#**************************************************************************

import cadquery as cq

import math, sys

# classic interpolation algorithm


def ntrp(x, xa, xb, ya, yb):
    return (x - xa) * (yb - ya) / (xb - xa) + ya


def save_part(data, name):
    path = f"{name}.stl"
    cq.exporters.export(data, path)
    print(f'Saved "{path}"')


def build_container(length, width, height, wall_thickness, corner_radius):
    box = (
        cq.Workplane("XY")
        .rect(length + wall_thickness, width + wall_thickness)
        .extrude(height)
        .edges("|Z")
        .fillet(corner_radius + wall_thickness / 2)
    )

    box_interior = (
        cq.Workplane("XY")
        .rect(length, width)
        .extrude(height)
        .edges("|Z")
        .fillet(corner_radius)
        .translate((0, 0, wall_thickness))
    )

    return box - box_interior


def main():

    # box data, all dimensions mm

    name = "box"

    wall_thickness = 3

    # these are interior dimensions for the main container
    length = 204
    width = 114
    height = 140

    # curvature at corners
    corner_radius = 20

    # this determines the tightness of fit between body and cover
    body_cover_gap = 0.05

    cover_edge_height = 20

    container = build_container(length, width, height + wall_thickness, wall_thickness, corner_radius)

    save_part(container, f"{name}_container")

    cover_length = length + wall_thickness + body_cover_gap
    cover_width = width + wall_thickness + body_cover_gap

    cover = build_container(
        cover_length,
        cover_width,
        cover_edge_height,
        wall_thickness,
        corner_radius + wall_thickness / 2,
    )

    save_part(cover, f"{name}_cover")


if __name__ == "__main__":
    main()