"""Bind shared contact surfaces without changing rebar or other concrete."""
import copy,json,os,sys,tempfile,time
from pathlib import Path
root=Path(__file__).resolve().parents[1]
sys.path.insert(0,str(root/'src/backend' if (root/'src/backend').is_dir() else root))
import server
from shared_contact_surface import bind
from box_member_schema import member_model

server.require_modeling_rules()
target=Path(sys.argv[1]).resolve();raw=target.read_bytes();job=json.loads(raw)
if job.get('status')=='running':raise ValueError('active job preserved')
old=job['result'];plan=copy.deepcopy(old)
rows=bind(plan['concrete_components'],server.component_surface_z_at_xy)
assert plan['rebar_groups']==old['rebar_groups']
for a,b in zip(old['concrete_components'],plan['concrete_components']):
    audit=next((r for r in rows if r['id']==a['id'] and r.get('rule')=='identical_planar_contact'),None)
    if audit:
        assert audit['max_rounding_correction_m']<=1e-6
        assert a.get('top_z_m')==b.get('top_z_m') and a.get('faces')==b.get('faces')
        assert a['vertices_xyz_m'][len(a['footprint_xy_m']):]==b['vertices_xyz_m'][len(b['footprint_xy_m']):]
    else:assert a=={k:v for k,v in b.items() if k!='shared_contact_surface'} or a==b
print(json.dumps(rows),flush=True)
if '--apply' in sys.argv and rows:
    plan['memberModel']=member_model(plan)
    plan.setdefault('drawingEvidence',{}).setdefault('preview_geometry',{})['components']=copy.deepcopy(plan['concrete_components'])
    plan['sharedContactSurfaceAudit']=rows
    job.update(result=plan,partialResult=copy.deepcopy(plan),geometryRevision=time.time_ns())
    if target.read_bytes()!=raw:raise ValueError('concurrent update')
    backup=target.with_name(target.stem+f'.before-shared-contact-{time.time_ns()}.json')
    with backup.open('xb')as f:f.write(raw)
    with tempfile.NamedTemporaryFile(mode='w',dir=target.parent,delete=False)as f:
        json.dump(job,f,ensure_ascii=False,allow_nan=False);temp=f.name
    if target.read_bytes()!=raw:raise ValueError('concurrent update before publication')
    os.replace(temp,target)
    print(json.dumps({'saved':True,'backup':str(backup)}))