$fn = 64;

// --- Parameters ---

// Wall Plate Dimensions
wall_plate_height = 120;
wall_plate_width = 40;
wall_plate_thickness = 8;
corner_radius = 5;

// Arm Dimensions
arm_length = 90; // Distance from wall to center of stack
arm_width = 16;
arm_height = 20;

// Collar/Holder Dimensions
collar_od = 45;
collar_id = 26; // 26mm fits a standard 1-inch (25.4mm) PVC pipe/pole
collar_height = 30;

// Mounting Hardware
screw_d = 5.5; // M5 screw
screw_head_d = 12;
screw_head_h = 6;
screw_offset = 45; // Distance from center for top/bottom screws
set_screw_d = 4.5; // M4 set screw for the collar

// --- Main Module ---

module plantstack_bracket() {
    difference() {
        union() {
            // 1. Wall Plate (Rounded)
            hull() {
                for (z = [wall_plate_height/2 - corner_radius, -wall_plate_height/2 + corner_radius]) {
                    for (y = [wall_plate_width/2 - corner_radius, -wall_plate_width/2 + corner_radius]) {
                        translate([wall_plate_thickness/2, y, z])
                            rotate([0, 90, 0])
                            cylinder(h=wall_plate_thickness, r=corner_radius, center=true);
                    }
                }
            }

            // 2. Main Horizontal Arm
            // Spans from the wall plate to the center of the collar
            translate([arm_length/2, 0, 0])
                cube([arm_length, arm_width, arm_height], center=true);

            // 3. Support Gussets (Top and Bottom for symmetric strength)
            for (z_mult = [1, -1]) {
                hull() {
                    // Attach to wall plate (slightly embedded for manifoldness)
                    translate([wall_plate_thickness/2, 0, z_mult * 25])
                        cube([wall_plate_thickness + 0.2, arm_width, 10], center=true);
                    
                    // Attach to arm
                    translate([arm_length - collar_od/2 - 10, 0, z_mult * (arm_height/2 - 0.1)])
                        cube([20, arm_width, 0.2], center=true);
                }
            }

            // 4. Pole Collar
            translate([arm_length, 0, 0])
                cylinder(h=collar_height, d=collar_od, center=true);
        }

        // --- Subtractions (Holes) ---

        // Central Pole Hole
        translate([arm_length, 0, 0])
            cylinder(h=collar_height + 2, d=collar_id, center=true);

        // Wall Mounting Screw Holes
        for (z = [screw_offset, -screw_offset]) {
            translate([0, 0, z]) {
                // Screw shaft
                translate([wall_plate_thickness/2, 0, 0])
                    rotate([0, 90, 0])
                    cylinder(h=wall_plate_thickness + 5, d=screw_d, center=true);
                
                // Countersink / Screw head recess
                translate([wall_plate_thickness - screw_head_h, 0, 0])
                    rotate([0, 90, 0])
                    cylinder(h=screw_head_h + 1, d1=screw_d, d2=screw_head_d);
            }
        }

        // Set Screw Hole (Front of collar to secure the pole)
        translate([arm_length + collar_od/2, 0, 0])
            rotate([0, 90, 0])
            cylinder(h=collar_od/2, d=set_screw_d, center=true);
    }
}

// Render the bracket
plantstack_bracket();