$fn=64;

// --- Parameters ---
rack_width = 220;
rack_depth = 70;
backplate_height = 45;
wall_thickness = 5;
mount_hole_d = 5;

module grooming_rack() {
    difference() {
        union() {
            // Wall mount backplate
            cube([rack_width, wall_thickness, backplate_height]);
            
            // Main shelf with rounded front corners
            hull() {
                cube([rack_width, 1, wall_thickness]);
                translate([5, rack_depth - 5, 0]) 
                    cylinder(h=wall_thickness, r=5);
                translate([rack_width - 5, rack_depth - 5, 0]) 
                    cylinder(h=wall_thickness, r=5);
            }
            
            // Triangular support gussets for structural integrity
            translate([wall_thickness, wall_thickness, wall_thickness]) 
                support_gusset();
            translate([rack_width / 2 - wall_thickness / 2, wall_thickness, wall_thickness]) 
                support_gusset();
            translate([rack_width - wall_thickness * 2, wall_thickness, wall_thickness]) 
                support_gusset();
        }

        // --- Mounting Holes with Countersinks ---
        translate([25, wall_thickness + 1, backplate_height - 15]) {
            rotate([90, 0, 0]) cylinder(h=wall_thickness + 2, d=mount_hole_d);
            rotate([90, 0, 0]) cylinder(h=3, d1=mount_hole_d * 2, d2=mount_hole_d);
        }
        translate([rack_width - 25, wall_thickness + 1, backplate_height - 15]) {
            rotate([90, 0, 0]) cylinder(h=wall_thickness + 2, d=mount_hole_d);
            rotate([90, 0, 0]) cylinder(h=3, d1=mount_hole_d * 2, d2=mount_hole_d);
        }

        // --- Tool Cutouts ---
        
        // 1. Clipper / Heavy Tool U-slot (Left)
        translate([35, rack_depth - 20, -1]) {
            cylinder(h=wall_thickness + 2, d=35);
            translate([-17.5, 0, 0]) cube([35, 25, wall_thickness + 2]);
        }

        // 2. Brush Handle Holes (Middle-Left)
        translate([85, rack_depth / 2 + 5, -1]) 
            cylinder(h=wall_thickness + 2, d=28);
        translate([120, rack_depth / 2 + 5, -1]) 
            cylinder(h=wall_thickness + 2, d=28);

        // 3. Comb Slots (Middle-Right)
        translate([150, 15, -1]) hull() {
            cylinder(h=wall_thickness + 2, d=6);
            translate([0, 35, 0]) cylinder(h=wall_thickness + 2, d=6);
        }
        translate([165, 15, -1]) hull() {
            cylinder(h=wall_thickness + 2, d=6);
            translate([0, 35, 0]) cylinder(h=wall_thickness + 2, d=6);
        }

        // 4. Scissors / Tweezers Holes (Right)
        translate([190, 25, -1]) cylinder(h=wall_thickness + 2, d=14);
        translate([190, 45, -1]) cylinder(h=wall_thickness + 2, d=14);
        translate([205, 35, -1]) cylinder(h=wall_thickness + 2, d=14);
    }
}

module support_gusset() {
    // Simple 3D-printable 45-degree triangular prism
    hull() {
        cube([wall_thickness, 0.1, backplate_height - wall_thickness - 5]);
        cube([wall_thickness, rack_depth - wall_thickness - 10, 0.1]);
        cube([wall_thickness, 0.1, 0.1]);
    }
}

// Render the rack
grooming_rack();