$fn = 64;

// --- PARAMETERS ---

// Flat-to-flat inner diameter of the hex bin (minus tolerance)
hex_flat_to_flat = 33.5; 
// Depth of the snap-in plug
insert_depth = 12.0;
// Wall thickness of the flexible plug
wall_thickness = 1.6;
// Thickness of the bin wall (determines snap ridge placement)
bin_wall_thickness = 3.0;
// Size of the snap ridge protrusion
snap_ridge = 0.6;

// Label plate dimensions
label_width = 45.0;
label_height = 20.0;
label_thickness = 2.0;
label_corner_radius = 2.0;

// --- CALCULATIONS ---
r_outer = hex_flat_to_flat / sqrt(3);
r_inner = (hex_flat_to_flat - 2 * wall_thickness) / sqrt(3);

// --- MAIN GEOMETRY ---

union() {
    // 1. Front Label Plate
    translate([0, 0, -label_thickness])
    label_plate();

    // 2. Hexagonal Snap-in Plug
    difference() {
        union() {
            // Base hex body
            cylinder(h = insert_depth - 1.5, r = r_outer, $fn = 6);
            
            // Tapered tip for easy insertion
            translate([0, 0, insert_depth - 1.5])
            cylinder(h = 1.5, r1 = r_outer, r2 = r_outer - 1.5, $fn = 6);
            
            // Snap fit ridge
            translate([0, 0, bin_wall_thickness])
            cylinder(h = 1.5, r1 = r_outer, r2 = r_outer + snap_ridge, $fn = 6);
            
            translate([0, 0, bin_wall_thickness + 1.5])
            cylinder(h = 1.5, r1 = r_outer + snap_ridge, r2 = r_outer, $fn = 6);
        }

        // Hollow center for flexibility
        translate([0, 0, -0.1])
        cylinder(h = insert_depth + 0.2, r = r_inner, $fn = 6);

        // Slits at the corners to create flexible tabs
        for(i = [0 : 60 : 359]) {
            rotate([0, 0, i])
            translate([r_inner * 0.7, -0.75, 1.0]) // Start 1mm above base for strength
            cube([r_outer, 1.5, insert_depth + 1]);
        }
    }
}

// --- MODULES ---

module label_plate() {
    hull() {
        for(x = [-label_width/2 + label_corner_radius, label_width/2 - label_corner_radius]) {
            for(y = [-label_height/2 + label_corner_radius, label_height/2 - label_corner_radius]) {
                translate([x, y, 0])
                cylinder(h = label_thickness, r = label_corner_radius);
            }
        }
    }
}