"""PCB card guide and board retaining clip, boards 1 to 2.4 mm thick, any length: as step.parts' published models
draw them.

A rectangular bar along X (centred on the origin, base on the XY plane) with a board slot along its top:
- guide: the slot runs the full length;
- retain-clip: the slot stops short of the +X end, and an end lip stands above the bar there, overhanging the end.
See the README.
"""
from steve import Model

kind = "guide"  # Kind: guide or retain-clip
board = "1.6"  # Board thickness (mm)
length = 100  # mm Length
material = "unspecified"  # Material

# mm, measured on step.parts' models pcb_card_guide_board<t>mm_l<length> and pcb_board_retain_clip_... (every planar
# face read): the same body for every board and length
BODY = {
    "width": 8.0,        # across (Y)
    "height": 6.0,       # bar top (Z)
    "floor": 1.8,        # slot floor above the base
    "lip_top": 6.6,      # clip: lip top
    "lip_inset": 1.0,    # clip: the slot stops this far from the +X end; the lip starts there
    "lip_overhang": 1.0, # clip: the lip overhangs the +X end by this
}
# board thickness: slot width (board + 0.3 in every model)
SLOTS = {"1": 1.3, "1.2": 1.5, "1.6": 1.9, "2": 2.3, "2.4": 2.7}
# material choice: (STEVE material library id, appearance colour); the models name no material
MATERIALS = {"unspecified": (None, None), "nylon": ("pa6", "#ece9e1"), "pom": ("pom-copolymer", "#f2f2ee")}

b = BODY
slot = SLOTS[board]
material_id, colour = MATERIALS[material]
end = length / 2

model = Model()
model.box("bar", length, b["width"], b["height"], at=(0, 0, b["height"] / 2), name="Bar")
slot_end = end if kind == "guide" else end - b["lip_inset"]
model.box("slot", slot_end + end, slot, b["height"], at=((slot_end - end) / 2, 0, b["floor"] + b["height"] / 2),
          op="cut", name="Board slot")
if kind == "retain-clip":
    lip_len = b["lip_inset"] + b["lip_overhang"]
    lip_h = b["lip_top"] - b["floor"]
    model.box("lip", lip_len, b["width"], lip_h,
              at=(end - b["lip_inset"] + lip_len / 2, 0, b["floor"] + lip_h / 2), op="join", name="End lip")
if material_id:
    model.material(material_id, color=colour)
result = model.result()