"""Auto-converted from polyholes.scad — cadbuildr.foundation port."""
from cadbuildr.foundation import (
    Part, Sketch, Point,
    Square, Rectangle, Circle, RegularPolygon, RectangleRounded,
    Extrusion, Lathe, Hole,
    Cylinder, Box, Sphere, Cone,
    show,
)
import math

# === SCAD constants reproduced verbatim ===
def sides(r):
    return max(round(4 * r), 3)

def corrected_radius(r, n):
    return 0.1 + r / math.cos(math.pi / n)

def corrected_diameter(d):
    n = sides(d / 2)
    return 0.2 + d / math.cos(math.pi / n)

# Default demo: poly_cylinder r=5, h=10
DEMO_R = 5
DEMO_H = 10

class Polyholes(Part):
    def __init__(self, r=DEMO_R, h=DEMO_H):
        super().__init__()
        sketch = self._sketch = Sketch(self.xy())
        n = sides(r)
        cr = corrected_radius(r, n)
        # polyCylinder: cylinder with corrected radius
        self._add_cyl(0, 0, 0, cr, h)

    def _pt(self, x, y):
        return Point(self._sketch, x, y)

    def _add_box(self, x, y, z, w, d, h, cut=False):
        self.add_operation(Box(self._pt(x, y), w, d, h, cut=cut))

    def _add_cyl(self, x, y, z, radius, height, cut=False):
        self.add_operation(Cylinder(self._pt(x, y), radius, height, cut=cut))

    def _add_cone(self, x, y, z, r1, r2, height):
        self.add_operation(Cone(self._pt(x, y), r1, r2, height))

    def _add_sphere(self, x, y, z, radius, cut=False):
        self.add_operation(Sphere(self._pt(x, y), radius, cut=cut))

    def _add_extrusion(self, shape, end, start=0, cut=False):
        self.add_operation(Extrusion(shape, end=end, start=start, cut=cut))


part = Polyholes()
show(part)