import os, sys
import FreeCAD as App
import Part
import Import
import MeshPart

def convert(step_path, out_path, lin=0.1, ang=0.35):
    doc = App.newDocument("conv")
    Import.insert(os.path.abspath(step_path), doc.Name)
    doc.recompute()

    shapes = []
    for o in doc.Objects:
        if hasattr(o, "Shape") and o.Shape and not o.Shape.isNull():
            shapes.append(o.Shape)

    if not shapes:
        raise RuntimeError("Keine Shapes gefunden.")

    compound = Part.makeCompound(shapes) if len(shapes) > 1 else shapes[0]
    mesh = MeshPart.meshFromShape(
        Shape=compound, LinearDeflection=lin, AngularDeflection=ang, Relative=False
    )
    mesh.write(os.path.abspath(out_path))
    App.closeDocument(doc.Name)

def main(argv):
    #print(argv, len(argv))
    if len(argv) < 3:
        print("Usage: FreeCADCmd script.py -- input.step output.stl [lin_defl] [ang_defl]")
        return 1
    inp = argv[2]
    out = argv[3]
    lin = float(argv[4]) if len(argv) > 4 else 0.1
    ang = float(argv[5]) if len(argv) > 5 else 0.35
    convert(inp, out, lin, ang)
    print(f"OK: {inp} -> {out}")
    return 0

# WICHTIG: immer ausführen (FreeCAD setzt __name__ nicht zuverlässig auf "__main__")
raise SystemExit(main(sys.argv))