from build123d import *

# --- Facade panel ---
PANEL = 1.6       # plate thickness (Cherry MX standard ~1.5 mm)

# --- Component footprints ---
SW_SIZE  = 14.0   # Cherry MX plate cutout (square)
SW_PITCH = 19.0   # switch centre-to-centre
N_SW     = 3

OLED_W = 25.0     # 0.96" SSD1306 visible window width
OLED_H = 13.0     # visible window height

# --- OLED alignment pegs (solid 2 mm, 24 mm square pattern) ---
POST_D       = 2.0    # peg diameter
POST_SPACING = 24.0   # hole centre-to-centre
POST_H       = 12.0   # peg length behind panel

# --- Layout ---
# MARGIN_Y=7 and OLED_SW_GAP=9 push outer_h to 50 mm, giving the top pegs
# 1.5 mm clearance from the panel edge and the bottom pegs 2.5 mm clearance
# above the switch cutout tops.
MARGIN_X    = 3.0
MARGIN_Y    = 7.0
OLED_SW_GAP = 9.0

outer_w = (N_SW - 1) * SW_PITCH + SW_SIZE + 2 * MARGIN_X   # 58 mm
outer_h = 2 * MARGIN_Y + OLED_H + OLED_SW_GAP + SW_SIZE    # 50 mm

oled_cy = outer_h / 2 - MARGIN_Y - OLED_H / 2   #  11.5 mm
sw_cy   = -outer_h / 2 + MARGIN_Y + SW_SIZE / 2  # -11.0 mm

with BuildPart() as case:
    Box(outer_w, outer_h, PANEL)

    with BuildSketch(Plane.XY.offset(PANEL / 2)):
        with Locations((0, oled_cy)):
            Rectangle(OLED_W, OLED_H)
        with Locations((-SW_PITCH, sw_cy), (0, sw_cy), (SW_PITCH, sw_cy)):
            RectangleRounded(SW_SIZE, SW_SIZE, 0.3)
    extrude(amount=-PANEL, mode=Mode.SUBTRACT)

    # Solid 2 mm alignment pegs extending from the back face
    half_s = POST_SPACING / 2
    post_z = -PANEL / 2 - POST_H / 2
    post_xy = [
        (-half_s, oled_cy - half_s),
        ( half_s, oled_cy - half_s),
        (-half_s, oled_cy + half_s),
        ( half_s, oled_cy + half_s),
    ]
    with Locations([(x, y, post_z) for x, y in post_xy]):
        Cylinder(POST_D / 2, POST_H)

export_stl(case.part, "case/output/case.stl")

try:
    from ocp_vscode import show
    show(case)
except Exception:
    pass