from pathlib import Path
import json
import FreeCAD as A, Part, Mesh, MeshPart

root=Path(r'C:\projects\wheel')
out=root/'models'/'washer_two_panels'
out.mkdir(parents=True,exist_ok=True)
V=A.Vector
reference=Part.read(str(root/'models'/'washer_panel_4x4'/'一体式4x4双厚垫片.step'))
results={}
for tag,thickness,orig_y in [('0.5mm',0.5,0),('1mm',1.0,24)]:
    d=A.newDocument('Panel'+tag.replace('.',''))
    params=d.addObject('Spreadsheet::Sheet','Parameters')
    params.set('A1','Thickness'); params.set('B1',str(thickness)+' mm'); params.setAlias('B1','Thickness')
    blank=d.addObject('Part::Box','Blank'); blank.Length=48; blank.Width=24; blank.setExpression('Height','Parameters.Thickness')
    tools=[]
    for row in range(2):
        for col in range(4):
            x,y=12*col+6,12*row+6
            c=d.addObject('Part::Cylinder','Hole%d%d'%(row,col)); c.Radius=2.2; c.Height=3; c.Placement.Base=V(x,y,-1);tools.append(c)
            p=d.addObject('Part::Box','Opening%d%d'%(row,col));p.Length=6;p.Width=6;p.Height=3;p.Placement.Base=V(x,y,-1);tools.append(p)
    union=d.addObject('Part::MultiFuse','Cutters');union.Shapes=tools
    panel=d.addObject('Part::Cut','Panel');panel.Base=blank;panel.Tool=union
    panel.Label='4x2 continuous washer panel '+tag
    d.recompute();s=panel.Shape
    assert s.isValid() and len(s.Solids)==1
    cells=[]
    for row in range(2):
        for col in range(4):
            cell=s.common(Part.makeBox(12,12,2,V(12*col,12*row,0)))
            old=reference.common(Part.makeBox(12,12,2,V(12*col,orig_y+12*row,0)))
            old.translate(V(0,-orig_y,0))
            diff=(cell.cut(old).Volume,old.cut(cell).Volume)
            assert cell.isValid() and len(cell.Solids)==1 and max(diff)<1e-6 and abs(cell.BoundBox.ZLength-thickness)<1e-7
            cells.append(diff)
    filename='一体垫片板_'+tag
    fc=out/(filename+'.FCStd'); step=out/(filename+'.step');stl=out/(filename+'.stl')
    d.saveAs(str(fc));Part.export([panel],str(step));MeshPart.meshFromShape(Shape=s,LinearDeflection=.025,AngularDeflection=.15,Relative=False).write(str(stl))
    A.closeDocument(d.Name)
    reopened=A.openDocument(str(fc)); reopened.recompute();f=reopened.getObject('Panel').Shape
    ss=Part.read(str(step));m=Mesh.Mesh(str(stl));components=m.getSeparateComponents()
    diff=(f.cut(ss).Volume,ss.cut(f).Volume)
    assert max(diff)<1e-6 and len(ss.Solids)==1 and ss.isValid() and len(components)==1 and components[0].isSolid()
    bb=ss.BoundBox
    assert abs(bb.XLength-48)<1e-6 and abs(bb.YLength-24)<1e-6 and abs(bb.ZLength-thickness)<1e-6
    results[tag]={'size_mm':[48,24,thickness],'quantity':8,'cells_diff_mm3':cells,'stl_components':len(components),'stl_closed':components[0].isSolid(),'step_fcstd_diff_mm3':diff,'step_valid':ss.isValid()}
    A.closeDocument(reopened.Name)
(out/'几何验证.json').write_text(json.dumps(results,ensure_ascii=False,indent=2),encoding='utf8')
print(json.dumps(results,ensure_ascii=False,indent=2))