$fn = 64;

// --- Parameters ---
hole_dia = 30;         // Diameter of the main holding hole
slot_width = 22;       // Width of the front opening
wall = 5;              // Wall thickness
depth = 40;            // Distance from wall to hole center
bracket_h = 20;        // Height of the holding bracket
back_w = 90;           // Backplate width
back_h = 35;           // Backplate height
screw_dia = 4.5;       // Screw hole diameter
screw_dist = 70;       // Distance between screw holes
corner_radius = 4;     // Radius for backplate corners

module rounded_backplate() {
    // Centered on X and Y, sitting flat on Z=0
    hull() {
        for (x = [-back_w/2 + corner_radius, back_w/2 - corner_radius]) {
            for (y = [-back_h/2 + corner_radius, back_h/2 - corner_radius]) {
                translate([x, y, 0])
                    cylinder(r=corner_radius, h=wall);
            }
        }
    }
}

module scoop_holder() {
    difference() {
        // --- Main Solid Body ---
        union() {
            rounded_backplate();

            // Bracket arm
            hull() {
                // Outer cylinder around the scoop handle
                translate([0, 0, depth])
                    rotate([90, 0, 0])
                        cylinder(r=hole_dia/2 + wall, h=bracket_h, center=true);

                // Wide base connecting to the backplate
                translate([0, 0, wall/2])
                    cube([hole_dia + wall*4, bracket_h, wall], center=true);
            }
        }

        // --- Cutouts ---

        // Main handle hole
        translate([0, 0, depth])
            rotate([90, 0, 0])
                cylinder(r=hole_dia/2, h=bracket_h + 2, center=true);

        // Front slot for sliding the handle in
        // Centered to cut from the middle of the hole straight out the front
        translate([0, 0, depth + (hole_dia/2 + wall)/2 + 0.5])
            cube([slot_width, bracket_h + 2, hole_dia/2 + wall + 1], center=true);

        // Left screw hole & countersink
        translate([-screw_dist/2, 0, -1])
            cylinder(r=screw_dia/2, h=wall + 2);
        translate([-screw_dist/2, 0, wall - 2])
            cylinder(r1=screw_dia/2, r2=screw_dia, h=2.1);

        // Right screw hole & countersink
        translate([screw_dist/2, 0, -1])
            cylinder(r=screw_dia/2, h=wall + 2);
        translate([screw_dist/2, 0, wall - 2])
            cylinder(r1=screw_dia/2, r2=screw_dia, h=2.1);
    }
}

// Render the final part
scoop_holder();